Gson JsonParser的使用

package iotest;



import com.google.gson.Gson;

import com.google.gson.JsonArray;

import com.google.gson.JsonElement;

import com.google.gson.JsonObject;

import com.google.gson.JsonParser;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;



/**

 * @author yan

 * @version V1.0

 * @desc 

 */

public class Iotest {

    

    public static void main(String[] args) {

        Result result = new Result();

        result.setNo(1);

        result.setMsg("OK");

        List<String> list = new ArrayList<String>();

        list.add("123");

        list.add("234");

        list.add("345");

        result.setObj(list);

        

        Gson gson = new Gson();

        String json = gson.toJson(result);

        

        System.out.println(json);

        

        /**

         * {"no":1,"msg":"OK","obj":["123","234","345"]}

         */

        

        JsonParser jp = new JsonParser();

        JsonObject jsonObj = jp.parse(json).getAsJsonObject();

        

        int no = jsonObj.get("no").getAsInt();

        System.out.println("no:"+no);

        

        String msg = jsonObj.get("msg").getAsString();

        System.out.println("msg:"+msg);

        

        JsonArray jsonArray = jsonObj.get("obj").getAsJsonArray();

        Iterator<JsonElement> iter = jsonArray.iterator();

        List<String> objs = new ArrayList<String>();

        while(iter.hasNext()){

            objs.add(iter.next().getAsString());

        }

        

        for(String s:objs){

            System.out.println("==s:"+s);

        }

        

    }

    

    

    static class Result{

        private Integer no;

        private String msg;

        private Object obj;



        public Integer getNo() {

            return no;

        }



        public void setNo(Integer no) {

            this.no = no;

        }



        public String getMsg() {

            return msg;

        }



        public void setMsg(String msg) {

            this.msg = msg;

        }



        public Object getObj() {

            return obj;

        }



        public void setObj(Object obj) {

            this.obj = obj;

        }

        

        

    }



}