fastJson工具类

jar：fast.jar

依赖：

<!-- fastjson -->
<dependency>
	<groupId>com.alibaba</groupId>
	<artifactId>fastjson</artifactId>
	<version>1.2.46</version>
</dependency>

工具类

package json;

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

import json.test.Student;

public class JSONSerial {

	public static JSONArray toJsonArray(String str) {
		JSONArray jsonArray = JSON.parseArray(str);
		return jsonArray;
	}

	public static JSONObject toJson(String str) {
		JSONObject jsonObject = JSON.parseObject(str);
		return jsonObject;
	}

	public static String serial(Object obj) {
		return JSON.toJSONString(obj);
	}

	public static <T> T deserial(String str, Class<T> clazz) {
		if (str == null || str.length() == 0) {
			return null;
		}
		return JSON.parseObject(str, clazz);
	}

	public static void main(String[] args) {
		String jsonStr = "{\"studentName\":\"lily\",\"studentAge\":12}";
//		JSONObject j = toJson(jsonStr);
//		System.out.println(j.getString("studentName"));

		Student s = deserial(jsonStr, Student.class);
		System.out.println(s.getStudentAge());
		String strs = serial(s);
		System.out.println(strs);

		String  JSON_ARRAY_STR = "[{\"studentName\":\"lily\",\"studentAge\":12},{\"studentName\":\"lucy\",\"studentAge\":15}]";
		JSONArray jsonArray	= toJsonArray(JSON_ARRAY_STR);
		for(Object obj : jsonArray){
			JSONObject jsonObject = (JSONObject) obj;
			System.out.println(jsonObject.get("studentName"));
		}
	}
}

测试类

package json.test;

public class Student {
	private String studentName;
	private int studentAge;
	public String getStudentName() {
		return studentName;
	}
	public void setStudentName(String studentName) {
		this.studentName = studentName;
	}
	public int getStudentAge() {
		return studentAge;
	}
	public void setStudentAge(int studentAge) {
		this.studentAge = studentAge;
	}

}

测试执行类

package json.test;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

import json.JSONSerial;

/**
  * @Title: TestFastJson.java
  * @Package json.test
  * @Description: TODO(用一句话描述该文件做什么)
  * @author licy
  * @date 2018年11月9日
  * @version V1.0
  */

public class TestFastJson {
	public static void main(String[] args) {
		String jsonStr = "{\"studentName\":\"lily\",\"studentAge\":12}";
//		JSONObject j = toJson(jsonStr);
//		System.out.println(j.getString("studentName"));

		Student s = JSONSerial.deserial(jsonStr, Student.class);
		System.out.println(s.getStudentAge());
		String strs = JSONSerial.serial(s);
		System.out.println(strs);

		String  JSON_ARRAY_STR = "[{\"studentName\":\"lily\",\"studentAge\":12},{\"studentName\":\"lucy\",\"studentAge\":15}]";
		JSONArray jsonArray	= JSONSerial.toJsonArray(JSON_ARRAY_STR);
		for(Object obj : jsonArray){
			JSONObject jsonObject = (JSONObject) obj;
			System.out.println(jsonObject.get("studentName"));
		}
	}
}