importcom.fasterxml.jackson.databind.ObjectMapper;importjava.io.File;importjava.io.IOException;publicclassMapToJsonExample{publicstaticvoidmain(String[]args){// 创建一个Map对象Map<String,Object>map=newHashMap<>();map.put("name","John");map.put("age",30);map.put("city","New York");// 使...
The method *** is undefined for the type JSONObject 缺哪个包—— json-lib.jar 这样还是不行的 需要一个依赖的jar包要不然会报错 java.lang.ClassNotFoundException: net.sf.ezmorph.Morpher 当当当当 jar包是ezmorph-***.jar 下面我们使用的方法是 JSONSerializer.toJSON(map对象) 比如我们的map对象是 {t...
importcom.alibaba.fastjson.JSON;importjava.util.HashMap;importjava.util.Map;publicclassMapToJsonExample{publicstaticvoidmain(String[]args){Map<String,Object>map=newHashMap<>();map.put("name","Alice");map.put("age",25);Stringjson=JSON.toJSONString(map);System.out.println(json);}} 1. 2....
1. JSON String to Map package com.inspur.trc.util; import java.util.HashMap; import java.util.Map; import com.fasterxml.jackson.core.type.TypeReference; import com.fasterxml.jackson.databind.ObjectMapper; public class Json2Map { public static void main(String[] args) { String json = "{\"n...
map转json字符串 <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.24</version> </dependency> Map<String, Object> resultMap =newHashMap<>(); resultMap.put("type", type); resultMap.put("id",10); ...
Java的fastjson对象,JSON,字符串,map之间的互转 对象与字符串之间的互转 将对象转换成为字符串 String str=JSON.toJSONString(infoDo)字符串转换成为对象 InfoDo infoDo=JSON.parseObject(strInfoDoInfoDo.class2.对象集合与字符串之间的互转 将对象集合转换成为字符串...
import com.google.gson.Gson; public class MapToJson { public static void main(String[] args) { Gson gson = new Gson(); Map<String, Object> map = new HashMap<>(); map.put("key1", "value1"); map.put("key2", 123); String json = gson.toJson(map); System.out.println(json)...
1 将数组转换为JSON：String[] arr = {"asd","dfgd","asd","234"};JSONArray jsonarray = JSONArray.fromObject(arr);System.out.println(jsonarray);2 对象转换成JSON：UserInfo user = new UserInfo(1001,"张三");JSONArray jsonArray = JSONArray.fromObject(user); System.out.println( jsonArray );...
当执行上段代码时,我惊奇地发现经过toJson方法后,获得的object的value竟然是空的,我断点进JSON里看过,在处理value时又进行了一次toJSON的操作,然后一次序列之后,value消失了
("JSON数据:[{}]转换对象失败",json,e);thrownewRuntimeException(e);}}/*** json转Arr* @param json* @param resultClazz* @return*/publicstatic<T>T[]jsonToArray(Stringjson,Class<T>resultClazz){try{ArrayTypearrayType=mapper.getTypeFactory().constructArrayType(resultClazz);returnmapper.readValue...