Gson日期格式化

Student类:

package ccc.json;

import java.sql.Timestamp;
import java.util.Date;

public class Student {
    int id;
    String name;
    Date birthDate;
    Timestamp updateTime;

    public Student() {
        super();
    }

    public Student(int id, String name, Date birthDate, Timestamp updateTime) {
        super();
        this.id = id;
        this.name = name;
        this.birthDate = birthDate;
        this.updateTime = updateTime;
    }

    public int getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public Date getBirthDate() {
        return birthDate;
    }

    public void setBirthDate(Date birthDate) {
        this.birthDate = birthDate;
    }

    public Timestamp getUpdateTime() {
        return updateTime;
    }

    public void setUpdateTime(Timestamp updateTime) {
        this.updateTime = updateTime;
    }

}

主程序入口:

package ccc.json;

import java.sql.Timestamp;
import java.util.Date;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

public class Gson_demo2 {
    public static void main(String[] args) {
        Student stu = new Student(1, "bobo", new Date(), new Timestamp(System.currentTimeMillis()));
        Gson gson1 = new GsonBuilder().setDateFormat("yyyy-MM-dd HH:mm:ss").create();
        String s = gson1.toJson(stu);
        System.out.println(s);
//        {"id":1,"name":"bobo","birthDate":"2015-05-22 14:09:33","updateTime":"2015-05-22 14:09:33"}
    }
}