1：GsonTools.java

package com.example.c10demo;


import java.util.List;
import java.util.Map;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

public class GsonTools {

    public GsonTools() {
        // TODO Auto-generated constructor stub
    }

    public static String createGsonString(Object object) {
        Gson gson 
 
= new Gson();
        String gsonString = gson.toJson(object);
        return gsonString;
    }

    public static <T> T changeGsonToBean(String gsonString, Class<T> cls) {
        Gson gson = new Gson();
        T t = gson.fromJson(gsonString, cls);
        return t;
    }

    public static
 
 <T> List<T> changeGsonToList(String gsonString, Class<T> cls) {
        Gson gson = new Gson();
        List<T> list = gson.fromJson(gsonString, new TypeToken<List<T>>() {
        }.getType());
        return list;
    }

    

    public static <T> List<Map<String, T>> changeGsonToListMaps(
            String gsonString) {
        List
 
<Map<String, T>> list = null;
        Gson gson = new Gson();
        list = gson.fromJson(gsonString, new TypeToken<List<Map<String, T>>>() {
        }.getType());
        return list;
    }

    public static <T> Map<String, T> changeGsonToMaps(String gsonString) {
        Map<String, T> map = null;
        Gson gson = new Gson();
        map = gson.fromJson(gsonString, new TypeToken<Map<String, T>>() {
        }.getType());
        return map;
    }
}

10：Gson類封裝