如果要将数组、对象、Map、List转换成JSON数据,那我们需要一些jar包:
json-lib-2.4-jdk15.jar
ezmorph-1.0.6.jar
commons-logging.jar
commons-lang.jar
commons-collections.jar
commons-beanutils.jar
maven依赖
https://blog.csdn.net/baidu_35468322/article/details/81207337
// 将数组转换为JSON: String[] arr = {"asd","dfgd","asd","234"}; JSONArray jsonarray = JSONArray.fromObject(arr); System.out.println(jsonarray); // 对象转换成JSON: UserInfo user = new UserInfo(1001,"张三"); JSONArray jsonArray = JSONArray.fromObject(user); System.out.println( jsonArray ); // 把Map转换成json, 要使用jsonObject对象: Map<String, Object> map = new HashMap<String, Object>(); map.put("userId", 1001); map.put("userName", "张三"); map.put("userSex", "男"); JSONObject jsonObject = JSONObject.fromObject(map); System.out.println(jsonObject); // 把List转换成JSON数据: List<UserInfo> list = new ArrayList<UserInfo>(); UserInfo user = new UserInfo(1001, "张三"); list.add(user); list.add(user); list.add(user); JSONArray jsonArray = JSONArray.fromObject(list); System.out.println(jsonArray);