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";
         }
     }
 }

Test.java

 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
         }
     }
 }

Test2.java