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Json转list，两种包，两种方式

2024-07-17 15:05:37   230人阅读

1、使用fastjson

对于json串大小写没什么要求，测试的时候，我把javaBean属性设置成和json串一样的大小写，代码如下：

package com.myTest.json.test1;import java.util.ArrayList;import java.util.List;import com.alibaba.fastjson.JSON;public class app1 {    public static void main(String[] args) {        String jsonString = "[{‘Value‘:‘0‘,‘Name‘:‘测试0‘,‘statusInfo‘:{‘Status‘:‘0‘}},{‘Value‘:‘1‘,‘Name‘:‘测试1‘,‘statusInfo‘:{‘Status‘:‘10‘}},{‘Value‘:‘2‘,‘Name‘:‘测试2‘,‘statusInfo‘:{‘Status‘:‘20‘}},{‘Value‘:‘3‘,‘Name‘:‘测试3‘,‘statusInfo‘:{‘Status‘:‘30‘}},{‘Value‘:‘4‘,‘Name‘:‘测试4‘,‘statusInfo‘:{‘Status‘:‘40‘}},{‘Value‘:‘5‘,‘Name‘:‘测试5‘,‘statusInfo‘:{‘Status‘:‘50‘}},{‘Value‘:‘6‘,‘Name‘:‘测试6‘,‘statusInfo‘:{‘Status‘:‘60‘}},{‘Value‘:‘7‘,‘Name‘:‘测试7‘,‘statusInfo‘:{‘Status‘:‘70‘}},{‘Value‘:‘8‘,‘Name‘:‘测试8‘,‘statusInfo‘:{‘Status‘:‘80‘}},{‘Value‘:‘9‘,‘Name‘:‘测试9‘,‘statusInfo‘:{‘Status‘:‘90‘}}]";        //String jsonString = "{‘Value‘:‘0‘,‘Name‘:‘测试0‘,‘statusInfo‘:{‘Status‘:‘12‘}}";        List<DeviceReturn> deviceReturns= app1.getPersons(jsonString, DeviceReturn.class);        System.out.println(deviceReturns);        String toJsonString = JSON.toJSONString(deviceReturns);        System.out.println(toJsonString);            }    public static <T> T getPerson(String jsonString, Class cls) {        T t = null;        try {            t = (T) JSON.parseObject(jsonString, cls);        } catch (Exception e) {            // TODO: handle exception        }        return t;    }        public static <T> List<T> getPersons(String jsonString, Class cls) {        List<T> list = new ArrayList<T>();        try {            list = JSON.parseArray(jsonString, cls);        } catch (Exception e) {        }        return list;    }}

结果如下：

[com.myTest.json.test1.DeviceReturn@25d285b, com.myTest.json.test1.DeviceReturn@32046f93, com.myTest.json.test1.DeviceReturn@4139358c, com.myTest.json.test1.DeviceReturn@12ea9bc8, com.myTest.json.test1.DeviceReturn@6899712b, com.myTest.json.test1.DeviceReturn@31d4f3b3, com.myTest.json.test1.DeviceReturn@13cb8654, com.myTest.json.test1.DeviceReturn@16dffef3, com.myTest.json.test1.DeviceReturn@4bdb0f40, com.myTest.json.test1.DeviceReturn@1ac659a8][{"name":"测试0","statusInfo":{"status":"0"},"value":"0"},{"name":"测试1","statusInfo":{"status":"10"},"value":"1"},{"name":"测试2","statusInfo":{"status":"20"},"value":"2"},{"name":"测试3","statusInfo":{"status":"30"},"value":"3"},{"name":"测试4","statusInfo":{"status":"40"},"value":"4"},{"name":"测试5","statusInfo":{"status":"50"},"value":"5"},{"name":"测试6","statusInfo":{"status":"60"},"value":"6"},{"name":"测试7","statusInfo":{"status":"70"},"value":"7"},{"name":"测试8","statusInfo":{"status":"80"},"value":"8"},{"name":"测试9","statusInfo":{"status":"90"},"value":"9"}]

json串中大写的，转成javaBean，再转成Json串后，变成符合java规范的属性名，很强大的一个包，赞一个。

2、使用net.sf.json.JSON

json串必须是符合java规范的属性，首字母必须小写，否则不能转成javaBean

public static void main(String[] args) {        String jsonString = "[{\"value\":\"0\",\"name\":\"测试0\",\"statusInfo\":{\"status\":\"0\"}},{\"value\":\"1\",\"name\":\"测试1\",\"statusInfo\":{\"status\":\"10\"}}]";        JSONArray array = JSONArray.fromObject(jsonString);        System.out.println("JSONArray:"+array);        List<?> deviceReturns = JSONArray.toList(array, new DeviceReturn(), new JsonConfig());        JSONObject ob = JSONObject.fromObject(deviceReturns.get(0));        System.out.println(ob);    }

修改javaBean与之对应，也能成功。


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