今天完成的事情：

 格式转换

package com.POJO;

import java.text.SimpleDateFormat;

public class DateToLong{
    private Integer ID;
    private String create_at;
    private String update_at;
    private String name;
    private String dailyLink;
    private int QQ;
    private String onlineNumber;
    private String mail;
    private int phone;
    private String enrollmentTime;
    private String professionType;
    private String brotherName;
    private String promise;
    
    
    public void setID(Integer ID) {
        this.ID = ID;
    }
    
    public void setName(String name) {
        this.name = name;
    }
    
    public void setCreate_at(String create_at) {
        this.create_at = create_at;
    }
    
    public void setUpdate_at(String update_at) {
        this.update_at = update_at;
    }
    
    public void setDailyLink(String dailyLink) {
        this.dailyLink = dailyLink;
    }
    
    public void setQQ(int QQ) {
        this.QQ = QQ;
    }
    
    public void setOnlineNumber(String onlineNumber) {
        this.onlineNumber = onlineNumber;
    }
    
    public void setMail(String mail) {
        this.mail = mail;
    }
    
    public void setPhone(int phone) {
        this.phone = phone;
    }
    
    public void setEnrollmentTime(String enrollmentTime) {
        this.enrollmentTime = enrollmentTime;
    }
    
    public void setProfessionType(String professionType) {
        this.professionType = professionType;
    }
    
    public void setBrotherName(String brotherName) {
        this.brotherName = brotherName;
    }
    
    public void setPromise(String promise) {
        this.promise = promise;
    }
    
    @Override
    public String toString() {
        return "Student{" +
                "ID=" + ID +
                ", name='" + name + '\'' +
                ", QQ=" + QQ +
                ", onlineNumber='" + onlineNumber + '\'' +
                ", enrollmentTime=" + enrollmentTime +
                ", professionType='" + professionType + '\'' +
                ", dailyLink='" + dailyLink + '\'' +
                ", promise='" + promise + '\'' +
                ", brotherName='" + brotherName + '\'' +
                ", create_at=" + create_at +
                ", update_at=" + update_at +
                '}';
    }
    public static DateToLong dateToLong(Student stu) {
        DateToLong myFmt = new DateToLong();
        myFmt.setID(stu.getID());
        myFmt.setName(stu.getName());
        myFmt.setQQ(stu.getQQ());
        myFmt.setBrotherName(stu.getBrotherName());
        myFmt.setDailyLink(stu.getDailyLink());
        myFmt.setPromise(stu.getPromise());
        myFmt.setMail(stu.getMail());
        myFmt.setPhone(stu.getPhone());
        //毕业时间类型转换
        SimpleDateFormat st = new SimpleDateFormat("yyyy年MM月dd日");
        String stchange = st.format(stu.getEnrollmentTime());
        myFmt.setEnrollmentTime(stchange);
//        Date date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(temp);
//        String str = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date);
        //创建时间类型转换
        SimpleDateFormat ct = new SimpleDateFormat("yyyy-MM-dd");
        String ctchange = ct.format(stu.getCreate_at());
        myFmt.setCreate_at(ctchange);
        //更新时间类型转换
        SimpleDateFormat ut = new SimpleDateFormat("yyyy-MM-dd");
        String utchange = ut.format(stu.getUpdate_at());
        myFmt.setUpdate_at(utchange);
        return myFmt;
    }
}

@RequestMapping(value = "/list",method = RequestMethod.GET)
public String select( Integer ID, Model model) throws Exception {
    student = studentMapper.findUserById(ID);
    System.out.println(student);
    DateToLong newstu =  DateToLong.dateToLong(student);
    System.out.println(newstu);
    model.addAttribute("student", newstu);
    return "list";
}

明天计划的事情：

完成整个列表日期转换格式
遇到的问题：

 
收获：