android中Gson解析

最近在做Android项目，用到了Gson解析，总结一下放在这里，方便以后使用

 

服务器端代码：

 

package com.sdufe.domain;

/**
 * @author lili.guo
 *
 *         2014-6-10下午2:20:31
 */
public class People {

    private int id;
    private String username;
    private String address;

    /**
     * 无参构造函数
     */
    public People() {
        // TODO Auto-generated constructor stub
    }

    public People(int id, String username, String address) {
        this.id = id;
        this.username = username;
        this.address = address;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

}

 

package com.sdufe.tools;

import com.google.gson.Gson;

/**
 * @author lili.guo
 *
 * 2014-6-10下午2:39:47
 */
public class JsonTools {

    /**
     * 将普通的字符串转化为json
     * @param value
     * @return
     */
    public static String CreateJsonStringbyGson(String value){
        Gson gson=new Gson();
        String json=gson.toJson(value);
        return json;
    }

}

 

package com.sdufe.Service;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.sdufe.domain.People;

/**
 * @author lili.guo
 *
 * 2014-6-10下午2:27:36
 */
public class JsonService {

    public People getPeople(){
        People people=new People(1001, "Thea", "beijing");
        return people;
    }

    public List<People> getList(){
        List<People> list=new ArrayList<People>();
        list.add(new People(1001, "Thea", "beijing"));
        list.add(new People(1001, "Thea", "beijing"));
        list.add(new People(1001, "Thea", "beijing"));
        return list;
    }

    public List<String> getString(){
        List<String> list=new ArrayList<String>();
        list.add("beijing");
        list.add("shanghai");
        return list;
    }

    public List<Map<String, Object>> getListMap(){
        List<Map<String, Object>> list=new ArrayList<Map<String,Object>>();
        Map<String, Object> map1=new HashMap<String, Object>();
        map1.put("id", 1001);
        map1.put("username", "Thea");
        map1.put("address", "beijing");
        list.add(map1);
        Map<String, Object> map2=new HashMap<String, Object>();
        map2.put("id", 1001);
        map2.put("username", "Thea");
        map2.put("address", "beijing");
        list.add(map2);
        return list;
    }

}

其中jsonService中转化的数据类型比较多，差不多经常用到的几种都放在这里了

 

 

客户端代码：

 

package com.sdufe.tools;

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

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import com.sdufe.domain.People;

/**
 * @author lili.guo
 *
 *         2014-6-10下午2:53:16
 */
public class GsonTool {

    public static People getPeople(String jsonString) {

        Gson gson = new Gson();
        People people = gson.fromJson(jsonString, People.class);
        return people;
    }

    public static List<People> getList(String jsonString) {

        Gson gson = new Gson();
        List<People> list=new ArrayList<People>();
        list=gson.fromJson(jsonString, new TypeToken<List<People>>() {
        }.getType());
        return list;
    }

    public static List<String> getString(String json){

        Gson gson=new Gson();
        List<String> list=new ArrayList<String>();
        list=gson.fromJson(json, new TypeToken<List<String>>() {
        }.getType());
        return list;
    }

    public List<Map<String, Object>> getListMap(String json){
        List<Map<String, Object>> list=new ArrayList<Map<String,Object>>();
        Gson gson=new Gson();
        list=gson.fromJson(json, new TypeToken<List<Map<String,Object>>>() {
        }.getType());
        return list;
    }

}

稍微解释一下

 

服务器端负责把String类型的字符串转化成json类型，而客户端则负责把json类型解析成普通的String类型