自己写的Java对象转json

package com.tools;

import com.entity.Province;
import com.google.gson.Gson;


public class JsonTool {
    public static String ToJson(Province province){
        //"{"+"id"+":1,"+"name"+":"+"666"+","+"jianCheng"+":"+"777"+","+"shengHui"+":"+"888"+"}";

        //Gson gson = new Gson();
        //String jso = gson.toJson(province);
        //System.out.println(jso);

        String id = String.valueOf(province.getId());
        String name = province.getName();
        String jianCheng = province.getJianCheng();
        String shengHui = province.getShengHui();

        String json = "{"+""id":"+id+","name""+":""+name+"","+""jianCheng""+":""+jianCheng+"","+""shengHui""+":""+shengHui+""}";
        return json;
    }

    public static void main(String[] args) {
        Province province = new Province(1,"陕西","秦","西安");
        System.out.println(ToJson(province));
        //System.out.println(""");
    }

}