提取json字符串中指定格式中的參數值

直接上代碼：

import java.util.ArrayList; import java.util.regex.Matcher; import java.util.regex.Pattern; public class TestDemo { public static void main(String[] args) {
 ArrayList json = new ArrayList(); json.add("111"); json.add("222"); json.add("333"); User user = new User(); user.setJson(json); user.setCode("200"); user.setMessage("true"); String string = "(" + JSON.toJSONString(user) + ")"; System.out.println(string); // String regex = "\"json\":(.*?),\"message\"";// 使用非貪婪模式！ Pattern pattern = Pattern.compile("\\[\"(.*?)\"\\]"); Matcher matcher = pattern.matcher(string); while (matcher.find()) { System.out.println(matcher.group(1)); } String parse = "[{CSTM_NO:\"11118\",CSTM_NAME:\"廣東XX電力有限公司\",FIX_GNL:\"111810158\",FIX_ACC:\"D201306070003\"," + "OP_FLAG:\"正常\",BUSS_KIND_NAME:\"三個月定期存款\",BAL:\"25,178,750.00\",AVAL_BAL:\"25,178,750.00\"," + "OP_DATE:\"2013-06-07\",DUE_DATE:\"2013-12-07\",ROWNUM_:1,idx:0},{CSTM_NO:\"11118\"," + "CSTM_NAME:\"廣東XX電力有限公司\",FIX_GNL:\"111810158\",FIX_ACC:\"D201306070002\",OP_FLAG:\"正常\"," + "BUSS_KIND_NAME:\"三個月定期存款\",BAL:\"25,178,750.00\",AVAL_BAL:\"25,178,750.00\",OP_DATE:\"2013-06-07\"," + "DUE_DATE:\"2013-12-07\",ROWNUM_:3,idx:2},{CSTM_NO:\"11118\",CSTM_NAME:\"廣東XX電力有限公司\"," + "FIX_GNL:\"111810158\",FIX_ACC:\"D201306070005\",OP_FLAG:\"正常\",BUSS_KIND_NAME:\"三個月定期存款\"," + "BAL:\"25,178,750.00\",AVAL_BAL:\"25,178,750.00\",OP_DATE:\"2013-06-07\",DUE_DATE:\"2013-12-07\"," + "ROWNUM_:4,idx:3}]";  String regex = "FIX_ACC:(.*?),OP_FLAG";//別忘了使用非貪婪模式！ Matcher matcher1 = Pattern.compile(regex).matcher(parse); while (matcher1.find()) { String ret = matcher1.group(1); System.out.println(ret); }

 String str = "我是[001]真心求救的[002]，你能幫幫我嗎"; Pattern pattern1 = Pattern.compile("\\[(.*?)\\]"); Matcher matcher2 = pattern1.matcher(str); while(matcher2.find()){ System.out.println(matcher2.group(1)); } } }

打印結果如下：

({"code":"200","json":["111","222","333"],"message":"true"})
111","222","333
"D201306070003"
"D201306070002"
"D201306070005"
001
002

Process finished with exit code 0