FastJsonTest1.java

package org.xmx0632.deliciousfruit.erp.fastjson;

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

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.TypeReference;

public class FastJsonTest1 {

	/**
	 * 数组转json格式字符串
	 */
	public void array2Json() {
		String[] arr = { "bill", "green", "maks", "jim" };
		String jsonText = JSON.toJSONString(arr, true);
		System.out.println("array2Json()方法：jsonText==" + jsonText);
		// 输出结果：jsonText==["bill","green","maks","jim"]
	}

	/**
	 * json格式字符串转数组
	 */
	public void json2Array() {
		String jsonText = "[\"bill\",\"green\",\"maks\",\"jim\"]";
		JSONArray jsonArr = JSON.parseArray(jsonText);
		System.out.println("json2Array()方法：jsonArr==" + jsonArr);
		// 输出结果：jsonArr==["bill","green","maks","jim"]
	}

	/**
	 * 数组转json格式字符串
	 */
	public void array2Json2() {
		User user1 = new User("P001", "TOM", 16);
		User user2 = new User("P002", "JACKSON", 21);
		User user3 = new User("P003", "MARTIN", 20);
		User[] userArr = { user1, user2, user3 };
		String jsonText = JSON.toJSONString(userArr, true);
		System.out.println("array2Json2()方法：jsonText==" + jsonText);
		// 输出结果：jsonText==[{"age":16,"id":"P001","name":"TOM"},{"age":21,"id":"P002","name":"JACKSON"},{"age":20,"id":"P003","name":"MARTIN"}]
	}

	/**
	 * json格式字符串转数组
	 */
	public void json2Array2() {
		String jsonText = "[{\"age\":16,\"id\":\"P001\",\"name\":\"TOM\"},{\"age\":21,\"id\":\"P002\",\"name\":\"JACKSON\"},{\"age\":20,\"id\":\"P003\",\"name\":\"MARTIN\"}]";
		JSONArray jsonArr = JSON.parseArray(jsonText);
		System.out.println("json2Array2()方法：jsonArr==" + jsonArr);
		// 输出结果：jsonArr==[{"age":16,"id":"P001","name":"TOM"},{"age":21,"id":"P002","name":"JACKSON"},{"age":20,"id":"P003","name":"MARTIN"}]
	}

	/**
	 * list集合转json格式字符串
	 */
	public void list2Json() {
		List<User> list = new ArrayList<User>();
		User user1 = new User("L001", "TOM", 16);
		list.add(user1);
		User user2 = new User("L002", "JACKSON", 21);
		list.add(user2);
		User user3 = new User("L003", "MARTIN", 20);
		list.add(user3);
		String jsonText = JSON.toJSONString(list, true);
		System.out.println("list2Json()方法：jsonText==" + jsonText);
		// 输出结果：jsonText==[{"age":16,"id":"L001","name":"TOM"},{"age":21,"id":"L002","name":"JACKSON"},{"age":20,"id":"L003","name":"MARTIN"}]

		ArrayList<User> list1 = JSON.parseObject(jsonText,
				new TypeReference<ArrayList<User>>() {
				});

		System.out.println("list1:" + list1);
	}

	/**
	 * map转json格式字符串
	 */
	public void map2Json() {
		Map<String, Address> map = new HashMap<String, Address>();
		Address address1 = new Address("广东省", "深圳市", "科苑南路", "580053");
		map.put("address1", address1);
		Address address2 = new Address("江西省", "南昌市", "阳明路", "330004");
		map.put("address2", address2);
		Address address3 = new Address("陕西省", "西安市", "长安南路", "710114");
		map.put("address3", address3);
		String jsonText = JSON.toJSONString(map, true);
		System.out.println("map2Json()方法：jsonText==" + jsonText);
		// 输出结果：jsonText=={"address1":{"city":"深圳市","post":"580053","province":"广东省","street":"科苑南路"},"address2":{"city":"南昌市","post":"330004","province":"江西省","street":"阳明路"},"address3":{"city":"西安市","post":"710114","province":"陕西省","street":"长安南路"}}
	}

	public static void main(String[] args) {
		FastJsonTest1 test = new FastJsonTest1();
		// 数组转json格式字符串
		test.array2Json();

		// json格式字符串转数组
		test.json2Array();

		// 数组转json格式字符串
		test.array2Json2();

		// json格式字符串转数组
		test.json2Array2();

		// list集合转json格式字符串
		test.list2Json();

		// list集合转json格式字符串
		// test.list2Json2();

		// map转json格式字符串
		test.map2Json();
	}
}