提取json字符串中指定格式中的参数值

直接上代码：

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\"";// 使用非贪婪模式！
        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:\"广东XX电力有限公司\",FIX_GNL:\"111810158\",FIX_ACC:\"D201306070003\"," +
                "OP_FLAG:\"正常\",BUSS_KIND_NAME:\"三个月定期存款\",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:\"广东XX电力有限公司\",FIX_GNL:\"111810158\",FIX_ACC:\"D201306070002\",OP_FLAG:\"正常\"," +
                "BUSS_KIND_NAME:\"三个月定期存款\",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:\"广东XX电力有限公司\"," +
                "FIX_GNL:\"111810158\",FIX_ACC:\"D201306070005\",OP_FLAG:\"正常\",BUSS_KIND_NAME:\"三个月定期存款\"," +
                "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";//别忘了使用非贪婪模式！
        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]，你能帮帮我吗";
        Pattern pattern1 = Pattern.compile("\\[(.*?)\\]");
        Matcher matcher2 = pattern1.matcher(str);
        while(matcher2.find()){
            System.out.println(matcher2.group(1));
        }
    }
}

打印结果如下：

({"code":"200","json":["111","222","333"],"message":"true"})
111","222","333
"D201306070003"
"D201306070002"
"D201306070005"
001
002
 
Process finished with exit code 0