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;
        }
        
        
    }

}