JMeter获取JSON内容

source("D:\apache-jmeter-3.0\用例\Test.java");
public static void f(){
    String response_data=prev.getResponseDataAsString();
    String JsonPath="$.data.groupList[0].dateList";
    String result=Test.readjson(response_data,JsonPath);//调用方法时语句要在方法体内，不能直接写语句，否则报错。
    log.info("---------------"+result+"---------------");
}
f();

import com.jayway.jsonpath.JsonPath;
import com.jayway.jsonpath.Predicate;
import net.minidev.json.JSONArray;
public class Test {    
    public static String readjson(String json, String jsonPath) {        
        try
        {
            Object value = JsonPath.read(json, jsonPath, new Predicate[0]);            
            if (value instanceof Integer)
              {
                return value.toString();
              }else if (value instanceof String)
              {
                    return value.toString();
              }else if (value instanceof Boolean)
              {
                    return value.toString();
              }else if (value instanceof JSONArray)
              {
                  JSONArray arr = (JSONArray)value;
                  if(!arr.isEmpty()){return arr.toJSONString();}                  
                  return "";
              }else if (value instanceof LinkedHashMap)
              {
                    return value.toString();
              }else if (value instanceof float)
              {
                    return value.toString();
              }else{
                  return  value.toString();
              }
        }
        catch(Exception e){
            return "pathnotfound";
        }        
    }    
}

import com.jayway.jsonpath.JsonPath;
import com.jayway.jsonpath.Predicate;
import net.minidev.json.JSONArray;
public class Test {    
    public static String readjson(String json, String jsonPath) {        
        try
        {
            Object value = JsonPath.read(json, jsonPath, new Predicate[0]);            
            if (value instanceof Integer)
              {
                return value.toString();
              }else if (value instanceof String)
              {
                    return value.toString();
              }else if (value instanceof Boolean)
              {
                    return value.toString();
              }else if (value instanceof JSONArray)
              {
                  JSONArray arr = (JSONArray)value;
                  if(!arr.isEmpty()){return arr.toJSONString();}                  
                  return "";
              }else if (value instanceof LinkedHashMap)
              {
                    return value.toString();
              }else if (value instanceof float)
              {
                    return value.toString();
              }else{
                  return  value.toString();
              }
        }
        catch(Exception e){
            return "null"; //此处设为"null“字符串，与实际返回null保持一致
        }        
    }    
}