Android 编程下使用 Google 的 Gson 解析 Json

package cn.sunzn.gson;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import cn.sunzn.bean.Person;

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

public class GsonActivity extends Activity {

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

Gson gson = new Gson();

/**
* 将给定的 JSON 字符串转换成指定的类型对象
*/
String json = "{\"name\":\"Tom\",\"age\":90}";
Person person = gson.fromJson(json, Person.class);
Log.e("GSON", person.toString());

/**
* 将给定的目标对象转换成 JSON 格式的字符串
*/
String json_Person = gson.toJson(person);
Log.e("GSON", json_Person);

/**
* 将给定的集合对象转换成 JSON 格式的字符串
*/
ArrayList<Person> persons = new ArrayList<Person>();
Collections.addAll(persons, new Person("tom", 10), new Person("jon", 20));
String json_list = gson.toJson(persons);
Log.e("GSON", json_list);

/**
* 将给定的 JSON 格式字符串转换为带泛型的集合对象
*/
List<Person> retList = gson.fromJson(json_list, new TypeToken<List<Person>>() {}.getType());
for (Person p : retList) {
Log.e("GSON", p.toString());
}
}
}

02-19 07:39:23.467: E/GSON(669): Person [name=Tom, age=90]
02-19 07:39:23.487: E/GSON(669): {"name":"Tom","age":90}
02-19 07:39:23.517: E/GSON(669): [{"name":"tom","age":10},{"name":"jon","age":20}]
02-19 07:39:23.547: E/GSON(669): Person [name=tom, age=10]
02-19 07:39:23.547: E/GSON(669): Person [name=jon, age=20]

package cn.sunzn.bean;

import com.google.gson.annotations.Expose;

public class Person {
@Expose
private String name;
@Expose
private int age;

public Person() {
super();
}

public Person(String name, int age) {
super();
this.name = name;
this.age = age;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public int getAge() {
return age;
}

public void setAge(int age) {
this.age = age;
}

public String toString() {
return "Person [name=" + name + ", age=" + age + "]";
}

}