android Json解析全

方式一

1、实体类

public class Person {

	private int age;
	private String name;

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

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

	public int getAge() {
		return age;
	}

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

	public String getName() {
		return name;
	}

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

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

}

2、服务类

public class JsonList {

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

	public static List<Person> getList() {
		List<Person> list = new ArrayList<Person>();
		list.add(new Person(1002,"李四2"));
		list.add(new Person(1003,"李四3"));
		list.add(new Person(1001,"李四1"));
		return list;
	}
	public static Person getPerson(){
		return new Person(1002,"李四2"); 
	}
}

import net.sf.json.JSON;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import net.sf.json.JSONSerializer;

public class JsonTools {

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

	public static String getString(Person person) {
		JSON json = JSONSerializer.toJSON(JsonList.getPerson());
		return json.toString();
	}

	/**
	 * 
	 * @param msgString
	 * @return
	 */
	public static Person getPerson(String msgString) {
		Person person = new Person();
		JSONArray array = new JSONArray();
		array.add(msgString);
		JSONObject obj = array.getJSONObject(0);
		// System.out.println(obj.get("age"));
		// System.out.println(obj.get("name"));
		person.setAge(obj.getInt("age"));
		person.setName(obj.getString("name"));
		return person;
	}

	public static String getListString(List<Person> listPersons) {
		JSON json = JSONSerializer.toJSON(listPersons);
		return json.toString();
	}

	
	/**
	 * 将一个json格式的字符串转换成行对应的对象
	 * @param str
	 * @return
	 */
	public static List<Person> getPersons(String str) {
		List<Person> list = new ArrayList<Person>();
		JSONArray array = new JSONArray();
		array.add(str);
		JSONArray array2 = array.getJSONArray(0);
		for (int i = 0; i <array2.size(); i++) {
			JSONObject jsonObject =  array2.getJSONObject(i);
			Person person = new Person();
			person.setAge(jsonObject.getInt("age"));
			person.setName(jsonObject.getString("name"));
			list.add(person);
		}
		return list;
	}


}

方式二

1、实体类

public class Person {

	private int age;
	private String name;

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

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

	public int getAge() {
		return age;
	}

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

	public String getName() {
		return name;
	}

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

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

}

2、服务类

public class JsonList {

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

	public static List<Person> getList() {
		List<Person> list = new ArrayList<Person>();
		list.add(new Person(1002,"李四2"));
		list.add(new Person(1003,"李四3"));
		list.add(new Person(1001,"李四1"));
		return list;
	}
	public static Person getPerson(){
		return new Person(1002,"李四2"); 
	}
}

import net.sf.json.JSON;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import net.sf.json.JSONSerializer;

public class JsonTools {

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

	public static String getString(Person person) {
		JSON json = JSONSerializer.toJSON(JsonList.getPerson());
		return json.toString();
	}

	/**
	 * 
	 * @param msgString
	 * @return
	 */
	public static Person getPerson(String msgString) {
		Person person = new Person();
		JSONArray array = new JSONArray();
		array.add(msgString);
		JSONObject obj = array.getJSONObject(0);
		// System.out.println(obj.get("age"));
		// System.out.println(obj.get("name"));
		person.setAge(obj.getInt("age"));
		person.setName(obj.getString("name"));
		return person;
	}

	public static String getListString(List<Person> listPersons) {
		JSON json = JSONSerializer.toJSON(listPersons);
		return json.toString();
	}

	
	/**
	 * 将一个json格式的字符串转换成行对应的对象
	 * @param str
	 * @return
	 */
	public static List<Person> getPersons(String str) {
		List<Person> list = new ArrayList<Person>();
		JSONArray array = new JSONArray();
		array.add(str);
		JSONArray array2 = array.getJSONArray(0);
		for (int i = 0; i <array2.size(); i++) {
			JSONObject jsonObject =  array2.getJSONObject(i);
			Person person = new Person();
			person.setAge(jsonObject.getInt("age"));
			person.setName(jsonObject.getString("name"));
			list.add(person);
		}
		return list;
	}

	

}

方式三

1、实体类

public class Person {

	private String name;
	private int age;
	private String address;

	public String getName() {
		return name;
	}

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

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

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

	public int getAge() {
		return age;
	}

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

	public String getAddress() {
		return address;
	}

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

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

}

2、服务类

import com.android.domain.Person;
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_person = gson.fromJson(gsonString,
				new TypeToken<List<T>>() {
				}.getType());
		return list_person;
	}

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

	

}

方式四

1、实体类

public class Person {

	private String name;
	private int age;
	private String address;

	public String getName() {
		return name;
	}

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

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

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

	public int getAge() {
		return age;
	}

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

	public String getAddress() {
		return address;
	}

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

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

}

2、服务类

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;
import com.alibaba.fastjson.asm.Type;
import com.alibaba.fastjson.util.TypeUtils;

public class FastJsonTools {

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

	public static String createJsonString(Object object) {
		String jsonString = JSON.toJSONString(object);
		return jsonString;
	}

	public static <T> T createJsonBean(String jsonString, Class<T> cls) {
		T t = JSON.parseObject(jsonString, cls);
		return t;
	}

	public static <T> List<T> createJsonToListBean(String jsonString,
			Class<T> cls) {
		List<T> list = null;
		list = JSON.parseArray(jsonString, cls);
		return list;
	}

	/**
	 * @param jsonString
	 * @return
	 */
	public static List<Map<String, Object>> createJsonToListMap(
			String jsonString) {
		List<Map<String, Object>> list2 = JSON.parseObject(jsonString,
				new TypeReference<List<Map<String, Object>>>() {
				});
		return list2;
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		// Person person1 = new Person("张三1", 24, "北京1");
		// Person person2 = new Person("张三2", 23, "北京2");
		// List<Person> list = new ArrayList<Person>();
		// list.add(person1);
		// list.add(person2);
		List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
		Map<String, Object> map = new HashMap<String, Object>();
		map.put("name", "jack");
		map.put("age", 23);
		Map<String, Object> map2 = new HashMap<String, Object>();
		map2.put("name", "rose");
		map2.put("age", 24);
		list.add(map);
		list.add(map2);

		String jsonString = JSON.toJSONString(list);
		System.out.println(jsonString);
		// JSON.parseArray(arg0, arg1)
		List<Map<String, Object>> list2 = JSON.parseObject(jsonString,
				new TypeReference<List<Map<String, Object>>>() {
				});
		// List<Person> lists = JSON.parseArray(arg0, arg1);
		System.out.println(list2.toString());

	}

}

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