springboot简单增删改查
springboot简单增删改查
1.前台页面
登录页
展示页
新增页
编辑页
2.后台代码
application.properties 配置 自动生成仅修改数据库名
# 数据库连接地址
spring.datasource.url=jdbc:mysql://localhost:3306/crud?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8
entity
package com.rugao.entity;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Employee {
private int id;
private String name;
private int sex;
private String position;
private String department;
}
User
package com.rugao.entity;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
private int id;
private String username;
private String password;
}
Dao
empdao
package com.rugao.dao;
import com.rugao.entity.Employee;
import org.apache.ibatis.annotations.Mapper;
import java.util.List;
@Mapper
public interface EmpDao {
List<Employee> queryAll();
int deleteById(int id);
int addEmp(Employee employee);
int updateEmp(Employee employee);
Employee queryById(int id);
List<Employee> queryByName(String name);
}
UserDao
package com.rugao.dao;
import com.rugao.entity.User;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface UserDao {
User queryUser(String username);
}
Mapper
empMapper
DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.rugao.dao.EmpDao">
<select id="queryAll" resultType="com.rugao.entity.Employee">
select * from employee
select>
<delete id="deleteById" parameterType="int">
delete from employee where id = #{id}
delete>
<insert id="addEmp" parameterType="com.rugao.entity.Employee">
insert into employee (name,sex,position,department) values (#{name},#{sex},#{position},#{department})
insert>
<update id="updateEmp" parameterType="com.rugao.entity.Employee">
update employee set name=#{name},sex=#{sex},position=#{position},department=#{department} where id=#{id}
update>
<select id="queryById" resultType="com.rugao.entity.Employee" parameterType="int">
select * from employee where id = #{id}
select>
<select id="queryByName" resultType="com.rugao.entity.Employee" parameterType="String">
select * from employee where name = #{name}
select>
mapper>
UserMapper
DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.rugao.dao.UserDao">
<select id="queryUser" resultType="com.rugao.entity.User">
select * from user where username=#{username}
select>
mapper>
service
empService
package com.rugao.service;
import com.rugao.entity.Employee;
import java.util.List;
public interface EmpService {
List<Employee> queryAll();
int deleteById(int id);
int addEmp(Employee employee);
int updateEmp(Employee employee);
Employee queryById(int id);
List<Employee> queryByName(String name);
}
empServiceImpl
package com.rugao.service.impl;
import com.rugao.dao.EmpDao;
import com.rugao.entity.Employee;
import com.rugao.service.EmpService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class EmpServiceImpl implements EmpService {
@Autowired
private EmpDao empDao;
@Override
public List<Employee> queryAll() {
return empDao.queryAll();
}
@Override
public int deleteById(int id) {
return empDao.deleteById(id);
}
@Override
public int addEmp(Employee employee) {
return empDao.addEmp(employee);
}
@Override
public int updateEmp(Employee employee) {
return empDao.updateEmp(employee);
}
@Override
public Employee queryById(int id) {
return empDao.queryById(id);
}
@Override
public List<Employee> queryByName(String name) {
return empDao.queryByName(name);
}
}
userService
package com.rugao.service;
import com.rugao.entity.User;
public interface UserService {
User queryUser(String username);
}
userServiceImpl
package com.rugao.service.impl;
import com.rugao.dao.UserDao;
import com.rugao.entity.User;
import com.rugao.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
@Override
public User queryUser(String username) {
return userDao.queryUser(username);
}
}
Controller
UserController
package com.rugao.controller;
import com.rugao.entity.User;
import com.rugao.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.http.HttpSession;
@Controller
public class UserController {
@Autowired
private UserService userService;
@RequestMapping("/")
public String tologin(){
return "login";
}
@RequestMapping("/login")
public String login(String username, String password, Model model, HttpSession session){
User user = userService.queryUser(username);
if(user!=null){
if (password.equals(user.getPassword())){
session.setAttribute("userInfo",username);
return "redirect:/showAll";
}else {
model.addAttribute("msg","用户名或密码不正确");
return "login";
}
}else {
model.addAttribute("mes","用户不存在");
return "login";
}
}
@RequestMapping("/logout")
public String logout(HttpSession session){
session.invalidate();
return "login";
}
}
empContoller
package com.rugao.controller;
import com.rugao.entity.Employee;
import com.rugao.service.EmpService;
import javafx.scene.control.Alert;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import java.io.Console;
import java.util.List;
@Controller
public class EmpController {
@Autowired
private EmpService empService;
@RequestMapping("/showAll")
public String show(Model model){
List<Employee> list = empService.queryAll();
model.addAttribute("emp",list);
return "index";
}
@RequestMapping("/delete/{id}")
public String delte(@PathVariable("id") int id){
empService.deleteById(id);
return "redirect:/showAll";
}
@RequestMapping("/toAdd")
public String toAdd(){
return "add";
}
@RequestMapping("/add")
public String AddEmp(Employee employee){
empService.addEmp(employee);
return "redirect:/showAll";
}
@RequestMapping("/toUpdate/{id}")
public String toUpdate(@PathVariable("id")int id, Model model){
Employee employee = empService.queryById(id);
model.addAttribute("emp",employee);
return "updateEmp";
}
@RequestMapping("/updateEmp")
public String update(Employee employee){
empService.updateEmp(employee);
return "redirect:/showAll";
}
@RequestMapping("/queryEmp")
public String findByName(String name,Model model){
List<Employee> employee = empService.queryByName(name);
model.addAttribute("emp",employee);
return "index";
}
}
gitee 地址
https://gitee.com/xy1262892971/springboot-crud