线上实习 日渐熟练——增删改查

//UserController
package com.zhongruan.controller;

import com.zhongruan.bean.User;
import com.zhongruan.service.IUserService;
import com.zhongruan.service.impl.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import java.util.List;

@Controller
@RequestMapping("/user")
public class UserController {

@Autowired
private IUserService userService;

@RequestMapping("/login.do")
public ModelAndView login(User user){
    boolean flag = userService.login(user.getUsername(), user.getPassword());
    ModelAndView modelAndView=new ModelAndView();
    if(flag){
        modelAndView.setViewName("main");
    }else {
        modelAndView.setViewName("../failer");
    }
   return modelAndView;

}

@RequestMapping("/findAll.do")
public ModelAndView findAll(){
    List<User> userList = userService.findAll();
    ModelAndView modelAndView = new ModelAndView();
    modelAndView.addObject("userList",userList);
    modelAndView.setViewName("user-list");
    return modelAndView;
}

@RequestMapping("/deleteById.do")
public String delete(int id){
    userService.deleteById(id);
    return "redirect:findAll.do";
}

@RequestMapping("/add.do")
public String add(User user){
    userService.add(user);
    return "redirect:findAll.do";
}

@RequestMapping("toUpdate.do")
public ModelAndView toUpdate(int id){
    User user = userService.selectUserById(id);
    ModelAndView modelAndView = new ModelAndView();
    modelAndView.setViewName("user-update");
    modelAndView.addObject("user",user);
    return modelAndView;
}

@RequestMapping("/Update.do")
public String Update(User user){
    userService.Update(user);
    return "redirect:findAll.do";
}

}

//UserDao
package com.zhongruan.dao;

import com.zhongruan.bean.User;

import java.util.List;

public interface UserDao {
User findUserByUserName(String username);

List<User> findAll();

void deleteById(int id);

void add(User user);

User selectById(int id);

void Update(User user);

}

//UserService
package com.zhongruan.service.impl;

import com.zhongruan.bean.User;
import com.zhongruan.dao.UserDao;
import com.zhongruan.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class UserService implements IUserService {

@Autowired
private UserDao userDao;

@Override
public boolean login(String username, String password) {
    User user = userDao.findUserByUserName(username);
    if (user!=null && user.getPassword().equals(password)){
        return true;
    }
    return false;
}

@Override
public List<User> findAll() {
    return userDao.findAll();
}

@Override
public void deleteById(int id) {
    userDao.deleteById(id);
}

@Override
public void add(User user) {
    userDao.add(user);
}

@Override
public User selectUserById(int id) {
    return userDao.selectById(id);
}

@Override
public void Update(User user) { userDao.Update(user); }

}

//IUserService
package com.zhongruan.service;

import com.zhongruan.bean.User;

import java.util.List;

public interface IUserService {
boolean login(String username,String password);

List<User> findAll();

void deleteById(int id);

void add(User user);

User selectUserById(int id);

void Update(User user);

}

//UserMapper

<?xml version="1.0" encoding="UTF-8" ?>

    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >

select * from wzbc1 where username=#{username}

<select id="findAll" resultType="user">
    select * from wzbc1
</select>

<delete id="deleteById" parameterType="int">
    delete from wzbc1 where id = #{id}
</delete>

<insert id="add" parameterType="user">
    insert into wzbc1 (id,username,password) values (#{id},#{username},#{password})
</insert>

<select id="selectById" parameterType="int" resultType="user">
    select * from wzbc1 where id=#{id}
</select>

<update id="Update" parameterType="user">
    update wzbc1 set id=#{id}, username=#{username}, password=#{password} where id= #{id}