{"id":190,"date":"2023-05-17T13:47:05","date_gmt":"2023-05-17T05:47:05","guid":{"rendered":"https:\/\/www.escook.cn\/?p=190"},"modified":"2023-09-26T21:08:45","modified_gmt":"2023-09-26T13:08:45","slug":"dart-%e5%9f%ba%e7%a1%80-%e5%86%85%e7%bd%ae%e7%b1%bb%e5%9e%8b-%e5%ad%97%e7%ac%a6%e4%b8%b2","status":"publish","type":"post","link":"https:\/\/www.escook.cn\/index.php\/2023\/05\/17\/dart-%e5%9f%ba%e7%a1%80-%e5%86%85%e7%bd%ae%e7%b1%bb%e5%9e%8b-%e5%ad%97%e7%ac%a6%e4%b8%b2\/","title":{"rendered":"Dart \u57fa\u7840 – \u5185\u7f6e\u7c7b\u578b – \u5b57\u7b26\u4e32"},"content":{"rendered":"
\n

\u7248\u6743\u5f52\u4f5c\u8005 \u00a9\u5218\u9f99\u5bbe<\/strong> \u6240\u6709\uff0c\u672c\u6587\u7ae0\u672a\u7ecf\u4f5c\u8005\u5141\u8bb8\uff0c\u7981\u6b62\u79c1\u81ea\u8f6c\u8f7d\uff01<\/p>\n<\/blockquote>\n

1. \u5b9a\u4e49\u5b57\u7b26\u4e32<\/h2>\n

1.1 \u5b9a\u4e49\u5355\u884c\u5b57\u7b26\u4e32<\/h3>\n

\u5728 Dart \u8bed\u8a00\u4e2d\uff0c\u652f\u6301\u5355\u5f15\u53f7<\/strong>\u548c\u53cc\u5f15\u53f7<\/strong>\u4e24\u79cd\u65b9\u5f0f\u5b9a\u4e49\u5355\u884c\u5b57\u7b26\u4e32<\/strong>\uff0c\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

void main(List<String> args) {\n  String s1 = '\u4f7f\u7528\u5355\u5f15\u53f7\u5b9a\u4e49\u5b57\u7b26\u4e32';\n  print(s1);\n\n  String s2 = "\u4f7f\u7528\u53cc\u5f15\u53f7\u5b9a\u4e49\u5b57\u7b26\u4e32";\n  print(s2);\n}<\/code><\/pre>\n
\u6ce8\u610f\uff1a\u76f8\u540c\u5185\u5bb9\u7684\u5b57\u7b26\u4e32\uff0c\u5728\u5185\u5b58\u4e2d\u4f1a\u88ab\u590d\u7528\uff0c\u8fd9\u6837\u80fd\u591f\u8282\u7701\u5185\u5b58\u7a7a\u95f4\u3002\u4f8b\u5982\uff1a<\/p>\n
void main(List<String> args) {\n  String s1 = 'liulongbin';\n  String s2 = "liulongbin";\n\n  \/\/ \u8f93\u51fa true\n  \/\/ \u8bc1\u660e\u5728\u5185\u5b58\u4e2d\u53ea\u521b\u5efa\u4e86\u4e00\u4e2a 'liulongbin' \u7684\u5b57\u7b26\u4e32\uff0c\u53d8\u91cf s1 \u548c s2 \u90fd\u6307\u5411\u8fd9\u4e2a\u5185\u5b58\u5730\u5740\n  print(identical(s1, s2));\n}<\/code><\/pre>\n
1.2 \u5b9a\u4e49\u591a\u884c\u5b57\u7b26\u4e32<\/h3>\n
Dart \u63d0\u4f9b\u4e86\u4e09\u4e2a\u5355\u5f15\u53f7<\/strong>\u548c\u4e09\u4e2a\u53cc\u5f15\u53f7<\/strong>\u4e24\u79cd\u5b9a\u4e49\u591a\u884c\u5b57\u7b26\u4e32\u7684\u65b9\u5f0f\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
void main(List<String> args) {\n  \/\/ \u4f7f\u7528\u4e09\u4e2a\u5355\u5f15\u53f7\u5b9a\u4e49\u591a\u884c\u5b57\u7b26\u4e32\n  String s1 = '''\n\u9762\u671d\u5927\u6d77\uff0c\n\u6625\u6696\u82b1\u5f00\u3002''';\n  print(s1);\n\n  \/\/ \u4f7f\u7528\u4e09\u4e2a\u53cc\u5f15\u53f7\u5b9a\u4e49\u591a\u884c\u5b57\u7b26\u4e32\n  String s2 = """\n\u597d\u597d\u5b66\u4e60\uff0c\n\u5929\u5929\u5411\u4e0a\u3002""";\n  print(s2);\n}<\/code><\/pre>\n
\n
\u6ce8\u610f\uff1a\u5728\u5b9a\u4e49\u591a\u884c\u5b57\u7b26\u4e32\u7684\u65f6\u5019\uff0c\u5185\u90e8\u7684\u6587\u672c\u9700\u8981\u9876\u5934\u5bf9\u9f50<\/strong>\uff0c\u5426\u5219\u4f1a\u5728\u5bf9\u5e94\u884c\u7684\u524d\u9762\uff0c\u51fa\u73b0\u989d\u5916\u7a7a\u767d\u5b57\u7b26<\/strong>\u7684\u60c5\u51b5\u3002<\/p>\n<\/blockquote>\n
1.3 \u5b57\u7b26\u4e32\u662f\u4e0d\u53ef\u53d8\u7684<\/h3>\n
\u5b57\u7b26\u4e32\u4e00\u65e6\u5728\u5185\u5b58\u4e2d\u88ab\u521b\u5efa\uff0c\u5c31\u65e0\u6cd5\u88ab\u91cd\u65b0\u4fee\u6539\uff0c\u5bf9\u5b57\u7b26\u4e32\u7684\u64cd\u4f5c\u603b\u662f\u4f1a\u5728\u5185\u5b58\u4e2d\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u3002\u4ee3\u7801\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n
void main(List<String> args) {\n  \/\/ \u5728\u5185\u5b58\u4e2d\u5f00\u8f9f\u7b2c1\u4e2a\u5b57\u7b26\u4e32 'liulongbin'\n  \/\/ \u5e76\u628a\u8fd9\u4e2a\u5b57\u7b26\u4e32\u7684\u5185\u5b58\u5730\u5740\u8d4b\u503c\u7ed9\u53d8\u91cf s1 \u548c s2\n  String s1 = 'liulongbin';\n  String s2 = 'liulongbin';\n\n  print(s1); \/\/ \u8f93\u51fa liulongbin\n  print(s2); \/\/ \u8f93\u51fa liulongbin\n\n  \/\/ \u5728\u5185\u5b58\u4e2d\u5f00\u8f9f\u7b2c2\u4e2a\u5b57\u7b26\u4e32 '---'\uff0c\n  \/\/ \u518d\u628a\u5185\u5b58\u4e2d\u7684\u7b2c1\u4e2a\u5b57\u7b26\u4e32 'liulongbin' \u548c\u7b2c2\u4e2a\u5b57\u7b26\u4e32 '---' \u62fc\u63a5\u8d77\u6765\uff0c\n  \/\/ \u62fc\u63a5\u7684\u7ed3\u679c\u662f\uff1a\u5728\u5185\u5b58\u4e2d\u5f00\u8f9f\u7b2c3\u4e2a\u5b57\u7b26\u4e32 'liulongbin---'\uff0c\n  \/\/ \u6700\u7ec8\uff0c\u628a\u7b2c3\u4e2a\u5b57\u7b26\u4e32\u7684\u5b58\u50a8\u5730\u5740\uff0c\u8d4b\u503c\u7ed9\u53d8\u91cf s2\n  s2 += '---';\n\n  print(s1); \/\/ \u8f93\u51fa liulongbin\uff0c\u56e0\u4e3a s1 \u53d8\u91cf\u6307\u5411\u5185\u5b58\u4e2d\u7684\u7b2c1\u4e2a\u5b57\u7b26\u4e32\n  print(s2); \/\/ \u8f93\u51fa liulongbin---\uff0c\u56e0\u4e3a s2 \u53d8\u91cf\u6307\u5411\u5185\u5b58\u4e2d\u7684\u7b2c3\u4e2a\u5b57\u7b26\u4e32\n}<\/code><\/pre>\n
2. \u62fc\u63a5\u4e0e\u6784\u5efa\u5b57\u7b26\u4e32<\/h2>\n
2.1 \u62fc\u63a5\u5b57\u7b26\u4e32<\/h3>\n
Dart \u4e2d\u652f\u6301\u4e24\u79cd\u62fc\u63a5\u5b57\u7b26\u4e32<\/strong>\u7684\u65b9\u6cd5\uff0c\u5206\u522b\u662f + \u8fd0\u7b97\u7b26<\/strong>\u548c\u5e76\u5217\u653e\u7f6e\u591a\u4e2a\u5b57\u7b26\u4e32<\/strong>\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
void main(List<String> args) {\n  \/\/ \u4f7f\u7528 + \u8fd0\u7b97\u7b26\u8fdb\u884c\u62fc\u63a5\n  String s1 = '\u4e2d\u534e' + "\u4eba\u6c11" + '''\u5171\u548c\u56fd''' + """\u4e07\u5c81""";\n  print(s1); \/\/ \u8f93\u51fa\u5b57\u7b26\u4e32\uff1a\u4e2d\u534e\u4eba\u6c11\u5171\u548c\u56fd\u4e07\u5c81\n\n  \/\/ \u5e76\u5217\u653e\u7f6e\u591a\u4e2a\u5b57\u7b26\u4e32\u8fdb\u884c\u62fc\u63a5\n  String s2 = '\u4e16\u754c' "\u4eba\u6c11" '''\u5927\u56e2\u7ed3''' """\u4e07\u5c81""";\n  print(s2); \/\/ \u8f93\u51fa\u5b57\u7b26\u4e32\uff1a\u4e16\u754c\u4eba\u6c11\u5927\u56e2\u7ed3\u4e07\u5c81\n\n  \/\/ \u5373\u4f7f\u6362\u884c\u7684\u591a\u4e2a\u5b57\u7b26\u4e32\uff0c\u4e5f\u80fd\u8fdb\u884c\u62fc\u63a5\n  String s3 = '\u6211'\n      "\u7231"\n      '''\u6211\u7684'''\n      """\u7956\u56fd""";\n  print(s3); \/\/ \u8f93\u51fa\u5b57\u7b26\u4e32\uff1a\u6211\u7231\u6211\u7684\u7956\u56fd\n}<\/code><\/pre>\n
2.2 \u6784\u5efa\u5b57\u7b26\u4e32<\/h3>\n
\u53ef\u4ee5\u4f7f\u7528 StringBuffer<\/code> \u4ee5\u4ee3\u7801\u7684\u65b9\u5f0f\u751f\u6210\u5b57\u7b26\u4e32\u3002\u4f7f\u7528 StringBuffer<\/code> \u7684\u4f18\u52bf\u662f\u5728\u8c03\u7528 .toString()<\/code> \u4e4b\u524d\uff0cStringBuffer<\/code> \u4e0d\u4f1a\u5728\u5185\u5b58\u4e2d\u751f\u6210\u65b0\u5b57\u7b26\u4e32\u5bf9\u8c61\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
void main(List<String> args) {\n  \/\/ 1. \u521b\u5efa StringBuffer \u5bf9\u8c61\n  StringBuffer sb = new StringBuffer();\n\n  \/\/ 2. \u8c03\u7528 write() \u65b9\u6cd5\uff0c\u5411 sb \u4e2d\u5199\u5165\u5355\u4e2a\u5b57\u7b26\u4e32\u7247\u6bb5\n  sb.write('\u4ece\u660e\u5929\u8d77\uff0c');\n  \/\/ 3. \u8c03\u7528 writeln() \u65b9\u6cd5\uff0c\u5411 sb \u4e2d\u5199\u5165\u5355\u4e2a\u5b57\u7b26\u4e32\u7247\u6bb5\uff0c\u5e76\u5728\u672b\u5c3e\u5199\u5165\u6362\u884c\u7b26\n  sb.writeln('\u505a\u4e00\u4e2a\u5e78\u798f\u7684\u4eba');\n  \/\/ 4. \u8c03\u7528 writeAll() \u65b9\u6cd5\uff0c\u4e00\u6b21\u6027\u5411 sb \u4e2d\u5199\u5165\u591a\u4e2a\u5b57\u7b26\u4e32\u7247\u6bb5\uff0c\u5e76\u4f7f\u7528\u7b2c\u4e8c\u4e2a\u53c2\u6570 '\uff0c' \u8fdb\u884c\u62fc\u63a5\n  \/\/ \u53c2\u65701\uff1a\u8981\u62fc\u63a5\u7684\u5b57\u7b26\u4e32\u7684\u6570\u7ec4\n  \/\/ \u53c2\u65702\uff1a\u62fc\u63a5\u65f6\u5019\u7684\u5206\u9694\u7b26\n  sb.writeAll(['\u5582\u9a6c', '\u5288\u67f4', '\u5468\u6e38\u4e16\u754c\\n'], '\uff0c');\n\n  \/\/ 5. \u8c03\u7528 StringBuffer \u5bf9\u8c61\u7684 toString() \u65b9\u6cd5\uff0c\u751f\u6210\u6700\u7ec8\u7684\u5b57\u7b26\u4e32\n  print(sb.toString());\n  \/\/ \u6700\u7ec8\u5728\u63a7\u5236\u53f0\u8f93\u51fa\u7684\u7ed3\u679c\u4e3a\uff1a\n  \/\/ \u4ece\u660e\u5929\u8d77\uff0c\u505a\u4e00\u4e2a\u5e78\u798f\u7684\u4eba\n  \/\/ \u5582\u9a6c\uff0c\u5288\u67f4\uff0c\u5468\u6e38\u4e16\u754c\n}<\/code><\/pre>\n
3. \u8f6c\u4e49\u4e0e\u539f\u59cb\u5b57\u7b26\u4e32<\/h2>\n
\u5728\u5b57\u7b26\u4e32\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 \\<\/code> \u6765\u8868\u793a\u8f6c\u4e49\u5b57\u7b26\uff0c\u4f8b\u5982 \\n<\/code> \u8868\u793a\u6362\u884c\u7b26\uff0c\\t<\/code> \u8868\u793a\u5236\u8868\u7b26\uff0c\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
void main(List<String> args) {\n  String s1 = '\u9762\u671d\u5927\u6d77\uff0c\\n\u6625\u6696\u82b1\u5f00\u3002\\t\u2014\u2014\u6d77\u5b50';\n  print(s1);\n  \/\/ \u5728\u63a7\u5236\u53f0\u8f93\u51fa\u7684\u7ed3\u679c\u4e3a\uff1a\n  \/\/ \u9762\u671d\u5927\u6d77\uff0c\n    \/\/ \u6625\u6696\u82b1\u5f00\u3002      \u2014\u2014\u6d77\u5b50\n}<\/code><\/pre>\n
\u5b57\u7b26\u4e32\u524d\u52a0\u4e0a r<\/code> \u4f5c\u4e3a\u524d\u7f00\u521b\u5efa \u201craw\u201d \u5b57\u7b26\u4e32\uff08\u5373\u4e0d\u4f1a\u88ab\u505a\u4efb\u4f55\u5904\u7406\uff08\u6bd4\u5982\u8f6c\u4e49\uff09\u7684\u5b57\u7b26\u4e32\uff09\uff1a<\/p>\n
void main(List<String> args) {\n  String s2 = r'\u9762\u671d\u5927\u6d77\uff0c\\n\u6625\u6696\u82b1\u5f00\u3002\\t\u2014\u2014\u6d77\u5b50';\n  print(s2);\n  \/\/ \u5728\u63a7\u5236\u53f0\u8f93\u51fa\u7684\u7ed3\u679c\u4e3a\uff08\u539f\u6837\u8f93\u51fa\uff0c\\n \u4e0d\u4f1a\u88ab\u5f53\u4f5c\u6362\u884c\u7b26\uff0c\\t \u4e5f\u4e0d\u4f1a\u88ab\u5f53\u4f5c\u5236\u8868\u7b26\uff09\uff1a\n  \/\/ \u9762\u671d\u5927\u6d77\uff0c\\n\u6625\u6696\u82b1\u5f00\u3002\\t\u2014\u2014\u6d77\u5b50\n}<\/code><\/pre>\n
4. \u5b57\u7b26\u4e32\u63d2\u503c<\/h2>\n
\u5728\u5b57\u7b26\u4e32\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 ${\u8868\u8fbe\u5f0f}<\/code> \u7684\u5f62\u5f0f\u5f80\u5b57\u7b26\u4e32\u4e2d\u63d2\u5165\u8868\u8fbe\u5f0f\u5bf9\u5e94\u7684\u503c\u3002\u5982\u679c\u8868\u8fbe\u5f0f\u662f\u4e00\u4e2a\u6807\u8bc6\u7b26\uff0c\u8fd8\u53ef\u4ee5\u7701\u7565\u6389 {}<\/code>\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
void main(List<String> args) {\n  String name = '\u5c0f\u660e';\n  int age = 18;\n\n  \/\/ \u6ce8\u610f\uff1a\n  \/\/ ${name} \u662f\u5b8c\u6574\u5199\u6cd5\uff0c\u7b80\u5199\u5f62\u5f0f\u4e3a $name\n  \/\/ ${age} \u662f\u5b8c\u6574\u5199\u6cd5\uff0c\u7b80\u5199\u5f62\u5f0f\u4e3a $age\n  \/\/ ${age + 2} \u4e0d\u80fd\u7b80\u5199\n  String s1 = '\u5927\u5bb6\u597d\u6211\u662f${name}\uff0c\u4eca\u5e74$age\u5c81\u4e86\uff0c\u4e24\u5e74\u540e${age + 2}\u5c81\u3002';\n  print(s1);\n}<\/code><\/pre>\n
5. \u5b57\u7b26\u4e32\u7684\u5e38\u7528\u65b9\u6cd5<\/h2>\n
5.1 \u5927\u5c0f\u5199\u8f6c\u6362<\/h3>\n
\u57fa\u4e8e\u5b57\u7b26\u4e32\u7684 toUpperCase()<\/code> \u548c toLowerCase()<\/code> \u65b9\u6cd5\uff0c\u53ef\u4ee5\u8f7b\u677e\u628a\u5b57\u7b26\u4e32\u8f6c\u4e3a\u5927\u5199<\/strong>\u548c\u5c0f\u5199<\/strong>\u5f62\u5f0f\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
void main(List<String> args) {\n  String slogan = 'You guilty\uff0cyou died';\n  \/\/ \u628a\u5b57\u7b26\u4e32\u8f6c\u4e3a\u5927\u5199\n  String upperSlogan = slogan.toUpperCase();\n  print(upperSlogan); \/\/ \u8f93\u51fa YOU GUILTY\uff0cYOU DIED\n\n  \/\/ \u628a\u5b57\u7b26\u4e32\u8f6c\u4e3a\u5c0f\u5199\n  String lowerSlogan = upperSlogan.toLowerCase();\n  print(lowerSlogan); \/\/ \u8f93\u51fa you guilty\uff0cyou died\n}<\/code><\/pre>\n
5.2 \u53bb\u9664\u5b57\u7b26\u4e32\u4e24\u7aef\u7684\u7a7a\u683c<\/h3>\n
\u8c03\u7528\u5b57\u7b26\u4e32 trim<\/code> \u76f8\u5173\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u9488\u5bf9\u6027\u7684\u53bb\u9664\u5b57\u7b26\u4e32\u4e24\u7aef\u7684\u7a7a\u683c\uff0c\u5176\u4e2d\uff1a<\/p>\n
    \n
  1. trim()<\/code> \u8868\u793a\u53bb\u9664\u5b57\u7b26\u4e32\u4e24\u7aef\u7684\u6240\u6709\u7a7a\u683c<\/li>\n
  2. trimLeft()<\/code> \u8868\u793a\u4ec5\u53bb\u9664\u5b57\u7b26\u4e32\u5de6\u4fa7\u7684\u6240\u6709\u7a7a\u683c<\/li>\n
  3. trimRight()<\/code> \u8868\u793a\u4ec5\u53bb\u9664\u5b57\u7b26\u4e32\u53f3\u4fa7\u7684\u6240\u6709\u7a7a\u683c<\/li>\n
  4. \u6ce8\u610f\uff1a\u4ee5\u4e0a3\u4e2a\u65b9\u6cd5\uff0c\u5bf9\u5b57\u7b26\u4e32\u4e2d\u95f4\u5305\u542b\u7684\u7a7a\u683c\u6ca1\u6709\u4efb\u4f55\u6548\u679c\u3002<\/li>\n<\/ol>\n
    \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
    void main(List<String> args) {\n  String greeting = '  hello world.  ';\n  \/\/ \u53bb\u9664\u5b57\u7b26\u4e32\u4e24\u7aef\u7684\u7a7a\u683c\n  print(greeting.trim());\n  \/\/ \u4ec5\u53bb\u9664\u5b57\u7b26\u4e32\u5de6\u4fa7\u7684\u7a7a\u683c\n  print(greeting.trimLeft());\n  \/\/ \u4ec5\u53bb\u9664\u5b57\u7b26\u4e32\u53f3\u4fa7\u7684\u7a7a\u683c\n  print(greeting.trimRight());\n}<\/code><\/pre>\n
    5.3 \u5224\u65ad\u7a7a\u5b57\u7b26\u4e32<\/h3>\n
      \n
    1. \u53ef\u4ee5\u901a\u8fc7\u5b57\u7b26\u4e32\u7684 isEmpty<\/code> \u5c5e\u6027\uff0c\u6765\u5224\u65ad\u67d0\u4e00\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\u5b57\u7b26\u4e32<\/strong>\u3002\n
        \n
      1. \u5982\u679c isEmpty<\/code> \u4e3a true\uff0c\u5219\u8bc1\u660e\u8fd9\u4e2a\u5b57\u7b26\u4e32\u662f\u7a7a\u5b57\u7b26\u4e32<\/strong><\/li>\n
      2. \u5982\u679c isEmpty<\/code> \u4e3a false\uff0c\u5219\u8bc1\u660e\u8fd9\u4e2a\u5b57\u7b26\u4e32\u4e0d\u662f\u7a7a\u5b57\u7b26\u4e32<\/strong><\/li>\n<\/ol>\n<\/li>\n
      3. \u76f8\u5e94\u7684\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u5b57\u7b26\u4e32\u7684 isNotEmpty<\/code> \u5c5e\u6027\uff0c\u6765\u5224\u65ad\u67d0\u4e00\u5b57\u7b26\u4e32\u662f\u5426\u662f\u4e0d\u4e3a\u7a7a\u7684\u5b57\u7b26\u4e32<\/strong>\u3002\n
          \n
        1. \u5982\u679c isNotEmpty<\/code> \u4e3a true\uff0c\u5219\u8bc1\u660e\u8fd9\u4e2a\u5b57\u7b26\u4e32\u662f\u4e0d\u4e3a\u7a7a\u7684\u5b57\u7b26\u4e32<\/strong><\/li>\n
        2. \u5982\u679c isNotEmpty<\/code> \u4e3a false\uff0c\u5219\u8bc1\u660e\u8fd9\u4e2a\u5b57\u7b26\u4e32\u4e0d\u662f\u4e0d\u4e3a\u7a7a\u7684\u5b57\u7b26\u4e32<\/strong><\/li>\n<\/ol>\n<\/li>\n<\/ol>\n
          \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
          void main(List<String> args) {\n  String s1 = '';\n  print(s1.isEmpty); \/\/ \u8f93\u51fa true\uff0c\u8868\u793a s1 \u662f\u7a7a\u5b57\u7b26\u4e32\n  print(s1.isNotEmpty); \/\/ \u8f93\u51fa false\uff0c\u8868\u793a s1 \u4e0d\u662f\u4e0d\u4e3a\u7a7a\u7684\u5b57\u7b26\n\n  String s2 = '   ';\n  print(s2.isEmpty); \/\/ \u8f93\u51fa false\uff0c\u8868\u793a s2 \u4e0d\u662f\u7a7a\u5b57\u7b26\u4e32\uff08\u56e0\u4e3a\u7a7a\u683c\u4e5f\u662f\u5b57\u7b26\uff09\n  print(s2.isNotEmpty); \/\/ \u8f93\u51fa true\uff0c\u8868\u793a s2 \u662f\u4e0d\u4e3a\u7a7a\u7684\u5b57\u7b26\u4e32\n}<\/code><\/pre>\n
          \n
          \u6ce8\u610f\uff1a\u76f8\u5bf9\u4e8e isEmpty<\/code> \u5c5e\u6027\u6765\u8bb2\uff0cisNotEmpty<\/code> \u5c5e\u6027\u7684\u8bed\u4e49\u6bd4\u8f83\u7ed5\uff0c\u56e0\u6b64\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u63a8\u8350\u4f7f\u7528 isEmpty<\/code> \u6765\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\u3002<\/p>\n<\/blockquote>\n
          5.4 \u5728\u5b57\u7b26\u4e32\u4e2d\u641c\u7d22<\/h3>\n
          \u53ef\u4ee5\u901a\u8fc7\u5b57\u7b26\u4e32\u7684 contains()<\/code> \u65b9\u6cd5\uff0c\u5224\u65ad\u67d0\u4e00\u5b57\u7b26\u4e32\u4e2d\u662f\u5426\u5305\u542b\u7279\u5b9a\u7684\u5b57\u7b26\u4e32\uff0c\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
          void main(List<String> args) {\n  String slogan = 'You guilty\uff0cyou died';\n\n  \/\/ \u5224\u65ad\u5b57\u7b26\u4e32\u53d8\u91cf slogan \u4e2d\u662f\u5426\u5305\u542b\u5b57\u7b26\u4e32 you\n  print(slogan.contains('you')); \/\/ \u8f93\u51fa true\n\n  \/\/ \u5224\u65ad\u5b57\u7b26\u4e32\u53d8\u91cf slogan \u4e2d\u662f\u5426\u5305\u542b\u5b57\u7b26\u4e32 your\n  print(slogan.contains('your')); \/\/ \u8f93\u51fa false\n}<\/code><\/pre>\n
          \u53ef\u4ee5\u901a\u8fc7\u5b57\u7b26\u4e32\u7684 startsWith()<\/code> \u65b9\u6cd5\uff0c\u5224\u65ad\u67d0\u4e00\u5b57\u7b26\u4e32\u662f\u5426\u4ee5\u7279\u5b9a\u7684\u5b57\u7b26\u4e32\u5f00\u5934\u3002\u76f8\u5e94\u7684\uff0c\u53ef\u4ee5\u901a\u8fc7\u5b57\u7b26\u4e32\u7684 endsWith()<\/code> \u65b9\u6cd5\uff0c\u5224\u65ad\u67d0\u4e00\u5b57\u7b26\u4e32\u662f\u5426\u4ee5\u7279\u5b9a\u7684\u5b57\u7b26\u4e32\u7ed3\u5c3e\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
          void main(List<String> args) {\n  String slogan = 'You guilty\uff0cyou died';\n\n  print(slogan.startsWith('You')); \/\/ \u8f93\u51fa true\n  print(slogan.startsWith('you')); \/\/ \u8f93\u51fa false\n\n  print(slogan.endsWith('died')); \/\/ \u8f93\u51fa true\n  print(slogan.endsWith('died.')); \/\/ \u8f93\u51fa false\n}<\/code><\/pre>\n
          \u53ef\u4ee5\u901a\u8fc7\u5b57\u7b26\u4e32\u7684 indexOf()<\/code> \u65b9\u6cd5\uff0c\u5728\u5b57\u7b26\u4e32\u5185\u67e5\u627e\u7279\u5b9a\u7684\u5b57\u7b26\u4e32\u7b2c\u4e00\u6b21\u51fa\u73b0\u65f6<\/strong>\u5bf9\u5e94\u7684\u7d22\u5f15\u7684\u4f4d\u7f6e\uff08\u6ce8\u610f\uff1a\u7d22\u5f15\u4ece 0 \u5f00\u59cb\uff09\u3002\u76f8\u5e94\u7684\uff0c\u8fd8\u53ef\u4ee5\u901a\u8fc7 lastIndexOf()<\/code> \u65b9\u6cd5\uff0c\u5728\u5b57\u7b26\u4e32\u5185\u67e5\u627e\u7279\u5b9a\u7684\u5b57\u7b26\u4e32\u6700\u540e\u4e00\u6b21\u51fa\u73b0\u65f6<\/strong>\u5bf9\u5e94\u7684\u7d22\u5f15\u7684\u4f4d\u7f6e\u3002\u5982\u679c\u67e5\u627e\u7684\u7ed3\u679c\u662f -1<\/code>\uff0c\u5219\u8bc1\u660e\u8981\u67e5\u627e\u7684\u5b57\u7b26\u4e32\u4e0d\u5305\u542b\u5728\u5f53\u524d\u5b57\u7b26\u4e32\u4e2d\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
          void main(List<String> args) {\n  String slogan = 'You guilty\uff0cyou died';\n\n  print(slogan.indexOf('ou')); \/\/ \u8f93\u51fa 1\uff0c\u8bc1\u660e ou \u7b2c\u4e00\u6b21\u51fa\u73b0\u7684\u4f4d\u7f6e\uff0c\u662f\u7d22\u5f15\u4e3a 1 \u7684\u4f4d\u7f6e\n  print(slogan.lastIndexOf('ou')); \/\/ \u8f93\u51fa 12\uff0c\u8bc1\u660e ou \u6700\u540e\u4e00\u6b21\u51fa\u73b0\u7684\u4f4d\u7f6e\uff0c\u662f\u7d22\u5f15\u4e3a 12 \u7684\u4f4d\u7f6e\n\n  print(slogan.indexOf('Punisher')); \/\/ \u8f93\u51fa -1\uff0c\u8bc1\u660e\u5b57\u7b26\u4e32 Punisher \u4e0d\u5305\u542b\u5728\u5b57\u7b26\u4e32\u4e2d\n  print(slogan.lastIndexOf('Punisher')); \/\/ \u8f93\u51fa -1\uff0c\u8bc1\u660e\u5b57\u7b26\u4e32 Punisher \u4e0d\u5305\u542b\u5728\u5b57\u7b26\u4e32\u4e2d\n}<\/code><\/pre>\n
          5.5 \u5206\u5272\u5b57\u7b26\u4e32<\/h3>\n
          \u5b57\u7b26\u4e32\u7684 split()<\/code> \u65b9\u6cd5\u7528\u6765\u5206\u5272\u5b57\u7b26\u4e32\uff0c\u5206\u5272\u7684\u7ed3\u679c\u4f1a\u5f97\u5230\u4e00\u4e2a\u5b57\u7b26\u4e32\u7684\u6570\u7ec4\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
          void main(List<String> args) {\n  String s1 = 'green red blue cyan';\n\n  \/\/ \u6309\u7167\u4e00\u4e2a\u7a7a\u683c\u5206\u5272\u5f53\u524d\u7684 s1 \u5b57\u7b26\u4e32\n  List<String> colors = s1.split(' ');\n\n  \/\/ \u8f93\u51fa [green, red, blue, cyan]\n  print(colors);\n}<\/code><\/pre>\n
          \u5728\u8c03\u7528 split()<\/code> \u65b9\u6cd5\u65f6\uff0c\u5982\u679c\u63d0\u4f9b\u4e86\u4e00\u4e2a\u7a7a\u5b57\u7b26\u4e32\uff0c\u5219\u4f1a\u628a\u5b57\u7b26\u4e32\u5206\u5272\u4e3a\u5355\u4e2a\u5b57\u7b26\u7684\u6570\u7ec4\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
          void main(List<String> args) {\n  String s1 = 'administration';\n\n  \/\/ \u4f7f\u7528\u201c\u7a7a\u5b57\u7b26\u4e32\u201d\u5206\u5272 s1 \u5b57\u7b26\u4e32\n  List<String> chars = s1.split('');\n\n  \/\/ \u8f93\u51fa [a, d, m, i, n, i, s, t, r, a, t, i, o, n]\n  print(chars);\n}<\/code><\/pre>\n
          5.6 \u57fa\u4e8e\u7d22\u5f15\u8bbf\u95ee\u5355\u4e2a\u5b57\u7b26<\/h3>\n
          \u5b57\u7b26\u4e32\u53ef\u4ee5\u57fa\u4e8e [index]<\/code> \u7d22\u5f15\u7684\u65b9\u5f0f\uff0c\u8bbf\u95ee\u5bf9\u5e94\u7684\u5355\u4e2a\u5b57\u7b26\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
          void main(List<String> args) {\n  String s1 = 'administration';\n\n  \/\/ \u8f93\u51fa\u7d22\u5f15\u4e3a3\u5bf9\u5e94\u7684\u5b57\u7b26\u4e32\uff0c\u4e3a i\n  \/\/ \u6ce8\u610f\uff1a\u7d22\u5f15\u4ece 0 \u5f00\u59cb\n  print(s1[3]);\n}<\/code><\/pre>\n
          5.7 \u586b\u5145\u5b57\u7b26\u4e32<\/h3>\n
          \u57fa\u4e8e\u5b57\u7b26\u4e32\u7684 padLeft(width, padding)<\/code> \u65b9\u6cd5\uff0c\u53ef\u4ee5\u5728\u5b57\u7b26\u4e32\u5de6\u4fa7<\/strong>\u586b\u5145\u6307\u5b9a\u7684\u5b57\u7b26\uff0c\u4ece\u800c\u4fdd\u8bc1\u586b\u5145\u540e\u7684\u5b57\u7b26\u4e32\u8fbe\u5230\u6307\u5b9a\u7684\u957f\u5ea6\u3002\u5176\u4e2d\uff1a<\/p>\n
            \n
          1. \u7b2c\u4e00\u4e2a\u53c2\u6570 width<\/code> \u662f\u4e00\u4e2a int \u6574\u6570\uff0c\u8868\u793a\u586b\u5145\u5b8c\u6bd5\u540e<\/strong>\u5b57\u7b26\u4e32\u7684\u603b\u957f\u5ea6<\/strong><\/li>\n
          2. \u7b2c\u4e8c\u4e2a\u53c2\u6570 padding<\/code> \u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u8868\u793a\u4ee5\u4ec0\u4e48\u6837\u7684\u5b57\u7b26\u4e32\u8fdb\u884c\u586b\u5145<\/li>\n<\/ol>\n
            \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
            void main(List<String> args) {\n  String s1 = '7';\n\n  \/\/ \u5728\u5b57\u7b26\u4e32 7 \u7684\u5de6\u4fa7\u4ee5\u5b57\u7b26\u4e32 0 \u8fdb\u884c\u586b\u5145\uff0c\u586b\u5145\u5b8c\u6bd5\u540e\u603b\u957f\u5ea6\u4e3a 3\u3002\n  \/\/ \u6700\u540e\uff0c\u8f93\u51fa\u5b57\u7b26\u4e32 007\n  print(s1.padLeft(3, '0'));\n}<\/code><\/pre>\n
            \u76f8\u5e94\u7684\uff0c\u8fd8\u6709\u4e00\u4e2a\u53f3\u4fa7\u586b\u5145\u5b57\u7b26\u4e32\u7684 padRight(width, padding)<\/code> \u65b9\u6cd5\uff0c\u7528\u6cd5\u4e0e padLeft()<\/code> \u7c7b\u4f3c\uff0c\u53ea\u662f padRight()<\/code> \u4f1a\u5728\u53f3\u4fa7\u8fdb\u884c\u586b\u5145\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
            void main(List<String> args) {\n  String s1 = '7';\n\n  \/\/ \u5728\u5b57\u7b26\u4e32 7 \u7684\u53f3\u4fa7\u4ee5\u5b57\u7b26\u4e32 0 \u8fdb\u884c\u586b\u5145\uff0c\u586b\u5145\u5b8c\u6bd5\u540e\u603b\u957f\u5ea6\u4e3a 3\u3002\n  \/\/ \u8f93\u51fa\u5b57\u7b26\u4e32700\n  print(s1.padRight(3, '0'));\n}<\/code><\/pre>\n
            6. \u5b57\u7b26\u548c\u6b63\u5219\u8868\u8fbe\u5f0f<\/h2>\n
            6.1 \u521b\u5efa\u6b63\u5219\u5b9e\u4f8b<\/h3>\n
            \u6b63\u5219\u8868\u8fbe\u5f0f\u53ef\u4ee5\u65b9\u4fbf\u7684\u5339\u914d<\/strong>\u548c\u63d0\u53d6<\/strong>\u5b57\u7b26\u4e32\u4e2d\u7684\u5185\u5bb9\u3002\u5728 Dart \u4e2d\u53ef\u4ee5\u57fa\u4e8e RegExp<\/code> \u7c7b\u8f7b\u677e\u521b\u5efa\u6b63\u5219\u5bf9\u8c61\uff0c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
            RegExp reg = new RegExp(r'\u6b63\u5219\u8868\u8fbe\u5f0f');<\/code><\/pre>\n
            \u5176\u4e2d new RegExp()<\/code> \u671f\u95f4\uff0c\u5de6\u4fa7\u7684 r<\/code> \u8868\u793a raw \u539f\u59cb\u683c\u5f0f\u7684\u5b57\u7b26\u4e32<\/strong>\uff08\u539f\u6837\u8f93\u51fa\u7684\u5b57\u7b26\u4e32\uff09\u3002\u56e0\u4e3a\u6b63\u5219\u4e2d\u5f80\u5f80\u4f1a\u5305\u542b \\d<\/code>\uff0c\\s<\/code> \u7b49\u8fd9\u4e9b\u5143\u5b57\u7b26<\/strong>\uff08\u5177\u6709\u7279\u6b8a\u610f\u4e49\u7684\u4e13\u7528\u5b57\u7b26\uff09\uff0c\u901a\u8fc7\u6307\u5b9a r<\/code> \u4ece\u800c\u8ba9\u4f20\u9012\u7ed9\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u5b57\u7b26\u4e32\uff0c\u80fd\u591f\u88ab\u5f53\u4f5c\u666e\u901a\u7684\u5b57\u9762\u503c\u5bf9\u5f85\uff0c\u4e0d\u9700\u8981\u628a\u5b83\u4eec\u5f53\u4f5c\u5b57\u7b26\u4e32\u4e2d\u7684\u8f6c\u4e49\u5b57\u7b26\u5bf9\u5f85\u3002<\/p>\n
            6.2 \u5224\u65ad\u6b63\u5219\u80fd\u5426\u6210\u529f\u5339\u914d\u5b57\u7b26\u4e32<\/h3>\n
            \u6b63\u5219\u5bf9\u8c61\u63d0\u4f9b\u4e86 hasMatch(string)<\/code> \u65b9\u6cd5\uff0c\u7528\u6765\u5224\u65ad\u5f53\u524d\u7684\u6b63\u5219\u80fd\u5426\u6210\u529f\u5339\u914d\u6307\u5b9a\u7684\u5b57\u7b26\u4e32\u3002\u5982\u679c\u80fd\u591f\u5339\u914d\u6210\u529f\uff0c\u5219 hasMatch()<\/code> \u7684\u8fd4\u56de\u503c\u4e3a true\uff0c\u5982\u679c hasMatch()<\/code> \u7684\u8fd4\u56de\u503c\u4e3a false \u5219\u8bc1\u660e\u5339\u914d\u5931\u8d25\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
            void main(List<String> args) {\n  \/\/ \u8981\u5339\u914d\u7684\u5b57\u7b26\u4e32\n  String s1 = '2022\u5e7411\u670827\u65e5 14:13:30';\n  \/\/ \u521b\u5efa\u6b63\u5219\u5bf9\u8c61\uff0c\u5176\u4e2d \\d \u8868\u793a\u5339\u914d\u4e00\u4e2a\u6570\u5b57\uff0c+ \u8868\u793a\u81f3\u5c11\u51fa\u73b01\u6b21\n  RegExp reg = new RegExp(r'\\d+');\n  \/\/ \u8f93\u51fa true\uff0c\u8868\u793a\u5339\u914d\u6210\u529f\uff0c\u5b57\u7b26\u4e32\u53d8\u91cf s1 \u4e2d\u5b58\u5728\u6570\u5b57\n  print(reg.hasMatch(s1));\n\n  String s2 = 'abc';\n  \/\/ \u8f93\u51fa false\uff0c\u8868\u793a\u5b57\u7b26\u4e32\u53d8\u91cf s2 \u4e2d\u4e0d\u5b58\u5728\u6570\u5b57\n  print(reg.hasMatch(s2));\n}<\/code><\/pre>\n
            6.3 \u83b7\u53d6\u5339\u914d\u6210\u529f\u7684\u7b2c\u4e00\u4e2a\u7ed3\u679c<\/h3>\n
            \u6b63\u5219\u5bf9\u8c61\u63d0\u4f9b\u4e86 firstMatch(string)<\/code> \u65b9\u6cd5\uff0c\u7528\u6765\u83b7\u53d6\u5339\u914d\u6210\u529f\u540e\u7684\u7b2c\u4e00\u4e2a\u7ed3\u679c\uff0c\u8fd4\u56de\u503c\u7684\u7c7b\u578b\u662f RegExpMatch<\/code> \u5bf9\u8c61\u3002\u5982\u679c\u6ca1\u6709\u4efb\u4f55\u5339\u914d\u7684\u7ed3\u679c\uff0c\u5219\u8fd4\u56de null<\/code>\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
            void main(List<String> args) {\n  String s1 = 'abc';\n  \/\/ \u521b\u5efa\u6b63\u5219\u5bf9\u8c61\uff0c\u5176\u4e2d \\d \u8868\u793a\u5339\u914d\u4e00\u4e2a\u6570\u5b57\uff0c+ \u8868\u793a\u81f3\u5c11\u51fa\u73b01\u6b21\n  RegExp reg = new RegExp(r'\\d+');\n\n  \/\/ \u8c03\u7528 firstMatch \u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u6b63\u5219\u5339\u914d\uff0c\n  \/\/ \u8fd4\u56de\u503c\u7528 match \u63a5\u6536\uff0c\u5b83\u7684\u7c7b\u578b\u662f\u53ef\u4e3a null \u7684 RegExpMatch \u7c7b\u578b\n  RegExpMatch? match = reg.firstMatch(s1);\n  \/\/ \u8f93\u51fa null\uff0c\u8bc1\u660e\u6ca1\u6709\u4efb\u4f55\u5339\u914d\u7684\u7ed3\u679c\n  print(match);\n}<\/code><\/pre>\n
            \u5982\u679c\u5b58\u5728\u591a\u4e2a\u5339\u914d\u7ed3\u679c<\/strong>\uff0c\u5219 firstMatch()<\/code> \u53ea\u4f1a\u8fd4\u56de\u7b2c\u4e00\u4e2a<\/strong>\u5339\u914d\u6210\u529f\u7684\u7ed3\u679c\uff0c\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
            void main(List<String> args) {\n  \/\/ \u8981\u5339\u914d\u7684\u5b57\u7b26\u4e32\n  String s1 = '2022\u5e7411\u670827\u65e5 14:13:30';\n  \/\/ \u521b\u5efa\u6b63\u5219\u5bf9\u8c61\uff0c\u5176\u4e2d \\d \u8868\u793a\u5339\u914d\u4e00\u4e2a\u6570\u5b57\uff0c+ \u8868\u793a\u81f3\u5c11\u51fa\u73b01\u6b21\n  RegExp reg = new RegExp(r'\\d+');\n\n  \/\/ \u8c03\u7528 firstMatch \u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u6b63\u5219\u5339\u914d\n  RegExpMatch? match = reg.firstMatch(s1);\n\n  \/\/ match?[0] \u548c match?.group(0) \u7684\u4f5c\u7528\u5b8c\u5168\u7b49\u4ef7\uff0c\u7528\u6765\u83b7\u53d6\u5339\u914d\u5230\u7684\u5b8c\u6574\u5185\u5bb9\n  print(match?[0]);       \/\/ \u8f93\u51fa 2022\n  print(match?.group(0)); \/\/ \u8f93\u51fa 2022\n}<\/code><\/pre>\n
            6.4 \u5728\u5339\u914d\u7684\u7ed3\u679c\u4e2d\u63d0\u53d6\u5206\u7ec4<\/h3>\n
            \u5728\u521b\u5efa\u6b63\u5219\u5bf9\u8c61\u671f\u95f4\uff0c\u53ef\u4ee5\u4f7f\u7528()<\/code> \u6765\u63d0\u53d6\u5206\u7ec4\u3002\u5982\u679c\u5339\u914d\u6210\u529f\uff0c\u53ef\u4ee5\u4f7f\u7528 .group(index)<\/code> \u65b9\u6cd5\u6216\u8005 [index]<\/code> \u7684\u65b9\u5f0f\uff0c\u63d0\u53d6\u5206\u7ec4\u5185\u5bb9\u3002\u6ce8\u610f\uff1a<\/p>\n
              \n
            1. .group(index)<\/code> \u548c [index]<\/code> \u662f\u5b8c\u5168\u7b49\u4ef7\u7684\uff0c\u90fd\u53ef\u4ee5\u63d0\u53d6\u5206\u7ec4\u5185\u5bb9<\/li>\n
            2. .group(0)<\/code> \u6216 [0]<\/code> \u6c38\u8fdc\u90fd\u662f\u5339\u914d\u6210\u529f\u7684\u5b8c\u6574\u5185\u5bb9\uff0c\u4ece .group(1)<\/code> \u6216 [1]<\/code> \u5f00\u59cb\u624d\u662f\u63d0\u53d6\u5230\u7684\u5206\u7ec4\u5185\u5bb9<\/li>\n<\/ol>\n
              \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
              void main(List<String> args) {\n  String s1 = '2022\u5e7411\u670827\u65e5 14:13:30';\n  \/\/ \u521b\u5efa\u6b63\u5219\u5bf9\u8c61\u671f\u95f4\uff0c\u4f7f\u7528 () \u63d0\u53d6\u5206\u7ec4\n  RegExp reg = new RegExp(r'(\\d+)\u5e74(\\d+)\u6708(\\d+)\u65e5');\n\n  \/\/ \u83b7\u53d6\u5339\u914d\u7684\u7b2c\u4e00\u4e2a\u7ed3\u679c\n  RegExpMatch? match = reg.firstMatch(s1);\n\n  print(match?[0]); \/\/ \u8f93\u51fa 2022\u5e7411\u670827\u65e5\n  print(match?[1]); \/\/ \u63d0\u53d6\u7b2c1\u4e2a\u5206\u7ec4\u7684\u5185\u5bb9\uff0c\u8f93\u51fa 2022\n  print(match?[2]); \/\/ \u63d0\u53d6\u7b2c2\u4e2a\u5206\u7ec4\u7684\u5185\u5bb9\uff0c\u8f93\u51fa 11\n  print(match?[3]); \/\/ \u63d0\u53d6\u7b2c3\u4e2a\u5206\u7ec4\u7684\u5185\u5bb9\uff0c\u8f93\u51fa 27\n}<\/code><\/pre>\n
              6.5 \u83b7\u53d6\u5339\u914d\u6210\u529f\u7684\u6240\u6709\u7ed3\u679c<\/h3>\n
              \u6b63\u5219\u5bf9\u8c61\u63d0\u4f9b\u4e86\u540d\u4e3a allMatches()<\/code> \u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u83b7\u53d6\u5230\u6240\u6709\u7684\u5339\u914d\u7ed3\u679c\uff0c\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
              void main(List<String> args) {\n  \/\/ \u8981\u5339\u914d\u7684\u5b57\u7b26\u4e32\n  String s1 = '2022\u5e7411\u670827\u65e5 14:13:30';\n  \/\/ \u521b\u5efa\u6b63\u5219\u5bf9\u8c61\uff0c\u5176\u4e2d \\d \u8868\u793a\u5339\u914d\u4e00\u4e2a\u6570\u5b57\uff0c+ \u8868\u793a\u81f3\u5c11\u51fa\u73b01\u6b21\n  RegExp reg = new RegExp(r'\\d+');\n\n  \/\/ 1. \u8c03\u7528 allMatches() \u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u6b63\u5219\u5339\u914d\uff0c\u83b7\u53d6\u6240\u6709\u7684\u5339\u914d\u7ed3\u679c\n  \/\/ \u8fd4\u56de\u503c\u7528 matches \u6765\u63a5\u6536\uff0c\u503c\u7c7b\u578b\u662f Iterable<RegExpMatch>\uff0c\u8868\u793a\u53ef\u8fed\u4ee3\u7684 RegExpMatch \u96c6\u5408\n  \/\/ 2. \u4e3a\u4e86\u65b9\u4fbf\u8d77\u89c1\uff0cIterable<RegExpMatch> \u53ef\u4ee5\u7b80\u5199\u4e3a var\uff0c\u8868\u793a\u7c7b\u578b\u63a8\u65ad\n  \/\/ var matches \u5b9a\u4e49\u7684\u53d8\u91cf\uff0c\u4f1a\u88ab Dart \u81ea\u52a8\u63a8\u65ad\u4e3a Iterable<RegExpMatch> \u7c7b\u578b\u7684\u53d8\u91cf\n  \/\/ Iterable<RegExpMatch> matches = reg.allMatches(s1); \/\/ \u5b8c\u6574\u5199\u6cd5\n  var matches = reg.allMatches(s1); \/\/ \u57fa\u4e8e\u7c7b\u578b\u63a8\u65ad\u7684\u7b80\u5316\u5199\u6cd5\n\n  \/\/ 3. \u4f7f\u7528 for \u5faa\u73af\u4f9d\u6b21\u8f93\u51fa\u6240\u6709\u5339\u914d\u5230\u7684\u5185\u5bb9\n  for (var match in matches) {\n    print(match[0]);\n    \/\/ \u5171\u5faa\u73af\u4e86 6 \u6b21\uff0c\u5206\u522b\u8f93\u51fa\uff1a\n    \/\/ 2022\n    \/\/ 11\n    \/\/ 27\n    \/\/ 14\n    \/\/ 13\n    \/\/ 30\n  }\n}<\/code><\/pre>\n
              6.6 \u4f7f\u7528\u6b63\u5219\u66ff\u6362\u5b57\u7b26\u4e32<\/h3>\n
              6.6.1 replaceAll<\/h4>\n
              \u8c03\u7528\u5b57\u7b26\u4e32\u7684 replaceAll(RegExp, string)<\/code> \u65b9\u6cd5\uff0c\u53ef\u4ee5\u628a\u6b63\u5219\u5339\u914d\u5230\u7684\u5185\u5bb9\uff0c\u5168\u90e8\u66ff\u6362\u4e3a\u6307\u5b9a\u7684\u5b57\u7b26\u4e32\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
              void main(List<String> args) {\n  \/\/ \u9700\u6c42\uff1a\u628a\u5b57\u7b26\u4e32\u4e2d\u7684\u201c\u6240\u6709\u6570\u5b57\u201d\u66ff\u6362\u4e3a\u201c\u4fdd\u5bc6\u201d\n  String s1 = '\u59d3\u540d\uff1a\u5c0f\u7ea2\uff0c\u5e74\u9f84\uff1a18\uff0c\u8eab\u9ad8\uff1a172\uff0c\u4f53\u91cd\uff1a99\uff0c\u7231\u597d\uff1a\u9ad8\u5c14\u592b';\n  \/\/ \u5339\u914d\u6570\u5b57\u7684\u6b63\u5219\n  RegExp reg = new RegExp(r'\\d+');\n\n  \/\/ \u8c03\u7528\u5b57\u7b26\u4e32\u7684 replaceAll() \u65b9\u6cd5\uff0c\n  \/\/ \u628a\u6b63\u5219\u5339\u914d\u5230\u7684\u5185\u5bb9\u66ff\u6362\u4e3a\u53c2\u65702\u5bf9\u5e94\u7684\u5b57\u7b26\u4e32\n  String newS1 = s1.replaceAll(reg, '\u4fdd\u5bc6');\n\n  \/\/ \u8f93\u51fa\u7684\u7ed3\u679c\u5982\u4e0b\uff1a\n  \/\/ \u59d3\u540d\uff1a\u5c0f\u7ea2\uff0c\u5e74\u9f84\uff1a\u4fdd\u5bc6\uff0c\u8eab\u9ad8\uff1a\u4fdd\u5bc6\uff0c\u4f53\u91cd\uff1a\u4fdd\u5bc6\uff0c\u7231\u597d\uff1a\u9ad8\u5c14\u592b\n  print(newS1);\n}<\/code><\/pre>\n
              6.6.2 replaceAllMapped<\/h4>\n
              \u5b57\u7b26\u4e32\u7684 replaceAll()<\/code> \u65b9\u6cd5\u53ea\u80fd\u628a\u5339\u914d\u5230\u7684\u5185\u5bb9\u66ff\u6362\u4e3a\u56fa\u5b9a\u7684\u6587\u672c<\/strong>\uff0c\u53ef\u64cd\u4f5c\u6027\u8f83\u4f4e\u3002\u5982\u679c\u60f3\u52a8\u6001\u63d0\u4f9b<\/strong>\u8981\u66ff\u6362\u7684\u5185\u5bb9\uff0c\u5efa\u8bae\u4f7f\u7528 replaceAllMapped()<\/code>  \u65b9\u6cd5\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
              void main(List<String> args) {\n  \/\/ \u9700\u6c42\uff1a\u628a\u5b57\u7b26\u4e32\u4e2d\u7684\u201c\u6570\u5b57\u201d\uff0c\u66ff\u6362\u76f8\u540c\u4f4d\u6570\u7684"x"\uff0c\u4f8b\u5982\uff1a\n  \/\/ \u6570\u5b57 9 \u53ea\u6709\u4e00\u4f4d\u6570\u5b57\uff0c\u6240\u4ee5\u8981\u66ff\u6362\u4e3a x\n  \/\/ \u6570\u5b57 110 \u6709\u4e09\u4f4d\u6570\u5b57\uff0c\u6240\u4ee5\u8981\u66ff\u6362\u4e3a xxx\n  \/\/ \u6570\u5b57 48 \u6709\u4e24\u4f4d\u6570\u5b57\uff0c\u6240\u4ee5\u8981\u66ff\u6362\u4e3a xx\n  String s1 = '\u59d3\u540d\uff1a\u5c0f\u767d\uff0c\u5e74\u9f84\uff1a9\uff0c\u8eab\u9ad8\uff1a110\uff0c\u4f53\u91cd\uff1a48\uff0c\u7231\u597d\uff1a\u753b\u753b';\n\n  \/\/ \u5339\u914d\u6570\u5b57\u7684\u6b63\u5219\n  RegExp reg = new RegExp(r'\\d+');\n\n  \/\/ \u8c03\u7528\u5b57\u7b26\u4e32\u7684 replaceAllMapped() \u65b9\u6cd5\uff0c\n  \/\/ \u628a\u6b63\u5219\u5339\u914d\u5230\u7684\u5185\u5bb9\uff0c\u66ff\u6362\u4e3a\u201c\u53c2\u65702\u201d\u8fd9\u4e2a\u51fd\u6570\u201c\u52a8\u6001\u8fd4\u56de\u7684\u5b57\u7b26\u4e32\u201d\n  String newS1 = s1.replaceAllMapped(\n      reg, (match) => match[0]!.replaceAll(RegExp(r'.'), 'x'));\n\n  \/\/ \u8f93\u51fa\u7684\u7ed3\u679c\u5982\u4e0b\uff1a\n  \/\/ \u59d3\u540d\uff1a\u5c0f\u767d\uff0c\u5e74\u9f84\uff1ax\uff0c\u8eab\u9ad8\uff1axxx\uff0c\u4f53\u91cd\uff1axx\uff0c\u7231\u597d\uff1a\u753b\u753b\n  print(newS1);\n}<\/code><\/pre>\n
              6.7 \u989d\u5916\u7684\u914d\u7f6e\u9879<\/h3>\n
              \u5728\u521b\u5efa\u6b63\u5219\u5bf9\u8c61\u671f\u95f4\uff0c\u53ef\u4ee5\u6307\u5b9a caseSensitive<\/code>, dotAll<\/code>, multiLine<\/code> \u7b49\u989d\u5916\u7684\u914d\u7f6e\u9879\u3002\u63a5\u4e0b\u6765\u5206\u522b\u5bf9\u4ed6\u4eec\u8fdb\u884c\u4ecb\u7ecd\u3002<\/p>\n
              6.7.1 caseSensitive<\/h4>\n
              caseSensitive<\/code> \u9009\u9879\u7528\u6765\u6307\u5b9a\u6b63\u5219\u5339\u914d\u65f6\u662f\u5426\u5ffd\u7565\u5927\u5c0f\u5199<\/strong>\u3002\u5982\u679c caseSensitive<\/code> \u7684\u503c\u662f true\uff0c\u8868\u793a\u4e25\u683c\u5339\u914d\u5927\u5c0f\u5199\uff1b\u5982\u679c caseSensitive<\/code> \u7684\u503c\u662f false\uff0c\u8868\u793a\u5ffd\u7565\u5927\u5c0f\u5199\u3002\u5982\u679c\u4e0d\u63d0\u4f9b caseSensitive<\/code> \u9009\u9879\u7684\u503c\uff0c\u5219\u9ed8\u8ba4\u503c\u4e3a true\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
              void main(List<String> args) {\n  String s1 = 'Abc';\n  \/\/ caseSensitive: false \u8868\u793a\u6b63\u5219\u5339\u914d\u65f6\u5ffd\u7565\u5927\u5c0f\u5199\n  RegExp reg = new RegExp(r'abc', caseSensitive: false);\n\n  \/\/ \u6b63\u5219\u5bf9\u8c61\u7684 hasMatch() \u65b9\u6cd5\uff0c\u7528\u6765\u5224\u65ad\u6b63\u5219\u80fd\u5426\u6210\u529f\u5339\u914d\u5bf9\u5e94\u7684\u5b57\u7b26\u4e32\uff0c\n  \/\/ true \u8868\u793a\u5339\u914d\u6210\u529f\uff1bfalse \u8868\u793a\u5339\u914d\u5931\u8d25\u3002\n  \/\/ \u8fd9\u91cc\u8f93\u51fa\u7684\u7ed3\u679c\u662f true\uff0c\u8868\u793a\u5339\u914d\u6210\u529f\n  print(reg.hasMatch(s1));\n}<\/code><\/pre>\n
              6.7.2 dotAll<\/h4>\n
              dotAll<\/code> \u9009\u9879\u7528\u6765\u6307\u5b9a\u6b63\u5219\u5339\u914d\u65f6 .<\/code> \u5143\u5b57\u7b26\u80fd\u5426\u5339\u914d \\r<\/code> \u56de\u8f66\u7b26\u4e0e \\n<\/code> \u6362\u884c\u7b26\u3002<\/p>\n
              dotAll<\/code> \u9009\u9879\u7684\u9ed8\u8ba4\u503c\u662f false\uff0c\u8868\u793a\u5143\u5b57\u7b26 .<\/code> \u53ea\u80fd\u5339\u914d\u9664\u4e86 \\r<\/code> \u548c \\n<\/code> \u4e4b\u5916\u7684\u4efb\u4f55\u5355\u4e2a\u5b57\u7b26\u3002<\/p>\n
              \u628a dotAll<\/code> \u9009\u9879\u8bbe\u7f6e\u4e3a true \u4e4b\u540e\uff0c\u5143\u5b57\u7b26 .<\/code> \u53ef\u4ee5\u5339\u914d\u5305\u62ec \\r<\/code> \u548c \\n<\/code> \u5728\u5185\u7684\u4efb\u4f55\u5355\u4e2a\u5b57\u7b26\uff0c\u76f8\u5f53\u4e8e\u89e3\u9664\u4e86\u5143\u5b57\u7b26 .<\/code> \u7684\u5c01\u5370\uff0c\u4f7f\u4e4b\u62e5\u6709\u66f4\u5f3a\u7684\u5339\u914d\u80fd\u529b\u3002<\/p>\n
              \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
              void main(List<String> args) {\n  String s1 = 'Abc\\r\\n';\n  \/\/ 1. dotAll \u7684\u9ed8\u8ba4\u503c\u4e3a false\uff0c\u6240\u4ee5\u6b64\u65f6\u5143\u5b57\u7b26 . \u4e0d\u80fd\u5339\u914d \\r \u548c \\n\n  RegExp reg = new RegExp(r'^.+$');\n  print(reg.hasMatch(s1)); \/\/ \u8f93\u51fa false\uff0c\u8868\u793a\u5339\u914d\u5931\u8d25\n\n  \/\/ ----\n\n  String s2 = 'Abc\\r\\n';\n  \/\/ 2. \u628a doAll \u8bbe\u7f6e\u4e3a true \u4e4b\u540e\uff0c\u5143\u5b57\u7b26 . \u80fd\u591f\u5339\u914d \\r \u548c \\n \u4e86\n  RegExp reg2 = new RegExp(r'^.+$', dotAll: true);\n  print(reg2.hasMatch(s2)); \/\/ \u8f93\u51fa true\uff0c\u8868\u793a\u5339\u914d\u6210\u529f\n}<\/code><\/pre>\n
              6.7.3 multiLine<\/h4>\n
              multiLine<\/code> \u9009\u9879\u7528\u6765\u6307\u5b9a\u6b63\u5219\u80fd\u5426\u5339\u914d\u591a\u884c\u6587\u672c<\/strong>\u3002\u9ed8\u8ba4\u503c\u4e3a false\uff0c\u8868\u793a\u65e0\u6cd5\u5339\u914d\u591a\u884c\u6587\u672c\u3002<\/p>\n
              \u628a multiLine<\/code> \u8bbe\u7f6e\u4e3a true \u4e4b\u540e\uff0c\u6b63\u5219\u4f1a\u4f9d\u6b21\u5339\u914d<\/strong>\u591a\u884c\u6587\u672c\u4e2d\u7684\u6bcf\u884c\u6587\u672c<\/strong>\uff0c\u53ea\u8981\u5b58\u5728\u80fd\u5339\u914d\u6210\u529f\u7684\u884c\uff0c\u5219 hasMatch()<\/code> \u65b9\u6cd5\u4f1a\u8fd4\u56de true\uff0c\u8868\u793a\u5339\u914d\u6210\u529f\u3002<\/p>\n
              \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
              void main(List<String> args) {\n  String s1 = '''\n111\n2A2\n333\n456C''';\n\n  \/\/ 1. \u56e0\u4e3a\u8981\u5339\u914d\u591a\u884c\u6587\u672c\uff0c\u56e0\u6b64\u8981\u5f00\u542f multiLine \u9009\u9879\n  RegExp reg = new RegExp(r'^\\d+$', multiLine: true);\n  \/\/ 2. \u8f93\u51fa true\u3002\u56e0\u4e3a\u7b2c1\u884c\u7684 '111' \u548c\u7b2c3\u884c\u7684 '333' \u80fd\u591f\u5339\u914d\u6210\u529f\n  print(reg.hasMatch(s1));\n\n  \/\/ 3. \u8c03\u7528\u6b63\u5219\u7684 allMatches() \u83b7\u53d6\u5230\u6240\u6709\u5339\u914d\u7684\u7ed3\u679c\n  for (RegExpMatch match in reg.allMatches(s1)) {\n    \/\/ 4. \u5e76\u4f7f\u7528 .group(0) \u8f93\u51fa\u6bcf\u6b21\u5339\u914d\u5230\u7684\u5185\u5bb9\uff08\u7b49\u540c\u4e8e match[0]\uff09\n    print(match.group(0));\n    \/\/ 5. \u5171\u8f93\u51fa\u4e86 2 \u6b21\uff0c\u5206\u522b\u662f\uff1a\n    \/\/ 111\n    \/\/ 333\n  }\n}<\/code><\/pre>\n
              \n
              \u7248\u6743\u5f52\u4f5c\u8005 \u00a9\u5218\u9f99\u5bbe<\/strong> \u6240\u6709\uff0c\u672c\u6587\u7ae0\u672a\u7ecf\u4f5c\u8005\u5141\u8bb8\uff0c\u7981\u6b62\u79c1\u81ea\u8f6c\u8f7d\uff01<\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"
              \u7248\u6743\u5f52\u4f5c\u8005 \u00a9\u5218\u9f99\u5bbe \u6240\u6709\uff0c\u672c\u6587\u7ae0\u672a\u7ecf\u4f5c\u8005\u5141\u8bb8\uff0c\u7981\u6b62\u79c1\u81ea\u8f6c\u8f7d\uff01 1. \u5b9a\u4e49\u5b57\u7b26\u4e32 1.1 \u5b9a\u4e49\u5355\u884c\u5b57\u7b26\u4e32 \u5728 Dart \u8bed\u8a00\u4e2d\uff0c\u652f\u6301\u5355\u5f15\u53f7\u548c\u53cc\u5f15\u53f7\u4e24\u79cd\u65b9\u5f0f\u5b9a\u4e49\u5355\u884c\u5b57\u7b26\u4e32\uff0c\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a void main(List<String> args) { String s1 = '\u4f7f\u7528\u5355\u5f15\u53f7\u5b9a\u4e49\u5b57\u7b26\u4e32'; print(s1); String s2 = "\u4f7f\u7528\u53cc\u5f15\u53f7\u5b9a\u4e49\u5b57\u7b26\u4e32"; print(s2); } \u6ce8\u610f\uff1a\u76f8\u540c\u5185\u5bb9\u7684\u5b57\u7b26\u4e32\uff0c\u5728\u5185\u5b58\u4e2d\u4f1a\u88ab\u590d\u7528\uff0c\u8fd9\u6837\u80fd\u591f\u8282\u7701\u5185\u5b58\u7a7a\u95f4\u3002\u4f8b\u5982\uff1a void main(List<String> args) { String s1 = 'liulongbin'; String s2 = "liulongbin"; \/\/ \u8f93\u51fa true \/\/ \u8bc1\u660e\u5728\u5185\u5b58\u4e2d\u53ea\u521b\u5efa\u4e86\u4e00\u4e2a 'liulongbin' \u7684\u5b57\u7b26\u4e32\uff0c\u53d8\u91cf s1 \u548c s2 \u90fd\u6307\u5411\u8fd9\u4e2a\u5185\u5b58\u5730\u5740 print(identical(s1, s2)); } 1.2 \u5b9a\u4e49\u591a\u884c\u5b57\u7b26\u4e32 Dart \u63d0\u4f9b\u4e86\u4e09\u4e2a\u5355\u5f15\u53f7\u548c\u4e09\u4e2a\u53cc\u5f15\u53f7\u4e24\u79cd\u5b9a\u4e49\u591a\u884c\u5b57\u7b26\u4e32\u7684\u65b9\u5f0f\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a void main(List<String> args) { \/\/ \u4f7f\u7528\u4e09\u4e2a\u5355\u5f15\u53f7\u5b9a\u4e49\u591a\u884c\u5b57\u7b26\u4e32 String s1 = ''' \u9762\u671d\u5927\u6d77\uff0c \u6625\u6696\u82b1\u5f00\u3002'''; print(s1); \/\/ \u4f7f\u7528\u4e09\u4e2a\u53cc\u5f15\u53f7\u5b9a\u4e49\u591a\u884c\u5b57\u7b26\u4e32 String s2 = """ \u597d\u597d\u5b66\u4e60\uff0c \u5929\u5929\u5411\u4e0a\u3002"""; print(s2); } \u6ce8\u610f\uff1a\u5728\u5b9a\u4e49\u591a\u884c\u5b57\u7b26\u4e32\u7684\u65f6\u5019\uff0c\u5185\u90e8\u7684\u6587\u672c\u9700\u8981\u9876\u5934\u5bf9\u9f50\uff0c\u5426\u5219\u4f1a\u5728\u5bf9\u5e94\u884c\u7684\u524d\u9762\uff0c\u51fa\u73b0\u989d\u5916\u7a7a\u767d\u5b57\u7b26\u7684\u60c5\u51b5\u3002 1.3 \u5b57\u7b26\u4e32\u662f\u4e0d\u53ef\u53d8\u7684 \u5b57\u7b26\u4e32\u4e00\u65e6\u5728\u5185\u5b58\u4e2d\u88ab\u521b\u5efa\uff0c\u5c31\u65e0\u6cd5\u88ab\u91cd\u65b0\u4fee\u6539\uff0c\u5bf9\u5b57\u7b26\u4e32\u7684\u64cd\u4f5c\u603b\u662f\u4f1a\u5728\u5185\u5b58\u4e2d\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u3002\u4ee3\u7801\u793a\u4f8b\u5982\u4e0b\uff1a void main(List<String> args) { \/\/ \u5728\u5185\u5b58\u4e2d\u5f00\u8f9f\u7b2c1\u4e2a\u5b57\u7b26\u4e32 'liulongbin' \/\/ \u5e76\u628a\u8fd9\u4e2a\u5b57\u7b26\u4e32\u7684\u5185\u5b58\u5730\u5740\u8d4b\u503c\u7ed9\u53d8\u91cf s1 \u548c s2 String s1 = 'liulongbin'; String s2 = 'liulongbin'; print(s1); \/\/ \u8f93\u51fa liulongbin print(s2); \/\/ \u8f93\u51fa liulongbin \/\/ \u5728\u5185\u5b58\u4e2d\u5f00\u8f9f\u7b2c2\u4e2a\u5b57\u7b26\u4e32 '—'\uff0c \/\/ \u518d\u628a\u5185\u5b58\u4e2d\u7684\u7b2c1\u4e2a\u5b57\u7b26\u4e32 'liulongbin' \u548c\u7b2c2\u4e2a\u5b57\u7b26\u4e32 '—' \u62fc\u63a5\u8d77\u6765\uff0c \/\/ \u62fc\u63a5\u7684\u7ed3\u679c\u662f\uff1a\u5728\u5185\u5b58\u4e2d\u5f00\u8f9f\u7b2c3\u4e2a\u5b57\u7b26\u4e32 'liulongbin—'\uff0c \/\/ \u6700\u7ec8\uff0c\u628a\u7b2c3\u4e2a\u5b57\u7b26\u4e32\u7684\u5b58\u50a8\u5730\u5740\uff0c\u8d4b\u503c\u7ed9\u53d8\u91cf s2 s2 += '—'; print(s1); \/\/ \u8f93\u51fa liulongbin\uff0c\u56e0\u4e3a s1 \u53d8\u91cf\u6307\u5411\u5185\u5b58\u4e2d\u7684\u7b2c1\u4e2a\u5b57\u7b26\u4e32 print(s2); \/\/ \u8f93\u51fa liulongbin—\uff0c\u56e0\u4e3a s2 \u53d8\u91cf\u6307\u5411\u5185\u5b58\u4e2d\u7684\u7b2c3\u4e2a\u5b57\u7b26\u4e32 } 2. \u62fc\u63a5\u4e0e\u6784\u5efa\u5b57\u7b26\u4e32 2.1 \u62fc\u63a5\u5b57\u7b26\u4e32 Dart \u4e2d\u652f\u6301\u4e24\u79cd\u62fc\u63a5\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\uff0c\u5206\u522b\u662f + \u8fd0\u7b97\u7b26\u548c\u5e76\u5217\u653e\u7f6e\u591a\u4e2a\u5b57\u7b26\u4e32\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a void main(List<String> args) { \/\/ \u4f7f\u7528 + \u8fd0\u7b97\u7b26\u8fdb\u884c\u62fc\u63a5 String s1 = '\u4e2d\u534e' + "\u4eba\u6c11" + '''\u5171\u548c\u56fd''' + """\u4e07\u5c81"""; print(s1); \/\/ \u8f93\u51fa\u5b57\u7b26\u4e32\uff1a\u4e2d\u534e\u4eba\u6c11\u5171\u548c\u56fd\u4e07\u5c81 \/\/ \u5e76\u5217\u653e\u7f6e\u591a\u4e2a\u5b57\u7b26\u4e32\u8fdb\u884c\u62fc\u63a5 String s2 = '\u4e16\u754c' "\u4eba\u6c11" '''\u5927\u56e2\u7ed3''' """\u4e07\u5c81"""; print(s2); \/\/ \u8f93\u51fa\u5b57\u7b26\u4e32\uff1a\u4e16\u754c\u4eba\u6c11\u5927\u56e2\u7ed3\u4e07\u5c81 \/\/ \u5373\u4f7f\u6362\u884c\u7684\u591a\u4e2a\u5b57\u7b26\u4e32\uff0c\u4e5f\u80fd\u8fdb\u884c\u62fc\u63a5 String s3 = '\u6211' "\u7231" '''\u6211\u7684''' """\u7956\u56fd"""; print(…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[9],"class_list":["post-190","post","type-post","status-publish","format-standard","hentry","category-dart","tag-dart"],"_links":{"self":[{"href":"https:\/\/www.escook.cn\/index.php\/wp-json\/wp\/v2\/posts\/190","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.escook.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.escook.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.escook.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.escook.cn\/index.php\/wp-json\/wp\/v2\/comments?post=190"}],"version-history":[{"count":3,"href":"https:\/\/www.escook.cn\/index.php\/wp-json\/wp\/v2\/posts\/190\/revisions"}],"predecessor-version":[{"id":580,"href":"https:\/\/www.escook.cn\/index.php\/wp-json\/wp\/v2\/posts\/190\/revisions\/580"}],"wp:attachment":[{"href":"https:\/\/www.escook.cn\/index.php\/wp-json\/wp\/v2\/media?parent=190"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.escook.cn\/index.php\/wp-json\/wp\/v2\/categories?post=190"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.escook.cn\/index.php\/wp-json\/wp\/v2\/tags?post=190"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}