SpringBoot项目｜手把手快速搭建员工管理系统（附源码）

个人主页：BoBooY的CSDN博客_Java领域博主

1.前言：在上一期中手把手带大家搭建了模拟数据库的SpringBoot员工管理系统（无数据库），相信大家已经对整体项目已经有了大体的的了解，这一期我来带大家一步一步的搭建 带有Druid数据源并整合了MySQL数据库的完整基础版员工管理系统。
2.读前须知：本期项目着重讲解如何将项目整合数据库，但搭建项目的每一步的代码和步骤也都一一罗列了出来供未阅读过上一期内容的小伙伴们参考，建议小伙伴们先阅读 上一期内容（可以着重看修改前端静态资源的内容，因为本期不再过多阐述），文章基本将所有项目的代码都贴了出来，如果有需要源码打包的小伙伴，文末可以自取。搭建项目过程中遇到的各种常见问题汇总在下方链接中，遇到问题时可以参考。
3.上期内容：无数据库版本员工管理系统搭建链接（重要，建议参考阅读！！）：https://blog.csdn.net/qq_58233406/article/details/126837617
4.项目搭建问题汇总（重要）：https://blog.csdn.net/qq_58233406/article/details/126914605

员工管理系统

1、初始化项目

1.1、新建项目

1.2、导入静态资源

静态资源链接：https://blog.csdn.net/qq_58233406/article/details/126838809

1.3、修改数据库版本

springboot2.6.11默认的mysql版本为8.0.30，本人mysql用的版本是5.7

<dependency>
    <groupId>mysqlgroupId>
    <artifactId>mysql-connector-javaartifactId>
    <version>5.1.47version>
    <scope>runtimescope>
dependency>

1.4、初始化首页

• 编写MVC扩展配置，设置首页

package com.bobooy.ems.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

/**
 * @author BoBooY
 * @date 2022/9/18 21:30
 */
@Configuration
public class MyMvcConfig implements WebMvcConfigurer {
    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        registry.addViewController("/").setViewName("index");
         registry.addViewController("/main.html").setViewName("dashboard");	//点击首页发送 /main.html请求
    }
}

1.5、国际化

• 设置项目编码为UTF-8

• 编写国际化配置文件

• 编写配置

  • login.properties ： 默认

  login.btn=请登录
  login.username=用户名
  login.password=密码
  login.remember=记住我
  login.tip=请登录
  

  • login_en_US.properties：英语

  login.btn=sign in
  login.username=username
  login.password=password
  login.remember=remember me
  login.tip=Please sign in
  

  • login_zh_CH.properties

  login.btn=请登录
  login.username=用户名
  login.password=密码
  login.remember=记住我
  login.tip=请登录
  

• 配置messages路径（注意空格，笔记代码只记录部分关键代码）

    #国际化配置
    messages:
      basename: i18n.login
  

• 配置国际化

  • 修改前端页面中英文的请求

  
  <a class="btn btn-sm" th:href="@{/index.html(lang='zh_CH')}">中文a>
  <a class="btn btn-sm" th:href="@{/index.html(lang='en_US')}">Englisha>
  

  • 编写处理国际化的配置类

  package com.springboot05ems.config;
  
  import org.springframework.web.servlet.LocaleResolver;
  import org.thymeleaf.util.StringUtils;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.util.Locale;
  
  /**
   * @author BoBooY
   * @date 2022/9/5 21:06
   */
  public class MyLocaleResolver implements LocaleResolver {
      @Override
      public Locale resolveLocale(HttpServletRequest request) {
          String lang = request.getParameter("lang");
          Locale locale = Locale.getDefault();
          //如果请求不为空
          if(!StringUtils.isEmpty(lang)) {
              //分割请求参数
              String[] s = lang.split("_");
              //国家，地区
              locale = new Locale(s[0],s[1]);
          }
          return locale;
  
      }
  
      @Override
      public void setLocale(HttpServletRequest request, HttpServletResponse response, Locale locale) {
  
      }
  }
  

  • 在个人的配置类（MyMvcConfig）中注册bean

  @Bean
  public LocaleResolver localeResolver() {
      return new MyLocaleResolver();
  }
  

  • 修改MyMvcConfig

  registry.addViewController("/index.html").setViewName("index");
  

2、登录功能实现

3.1、设计数据库表

CREATE DATABASE /*!32312 IF NOT EXISTS*/`springboot` /*!40100 DEFAULT
CHARACTER SET utf8 */;

USE `springboot`;

/*Table structure for table `department` */
DROP TABLE IF EXISTS `department`;

CREATE TABLE `department` (
`id` int(3) NOT NULL AUTO_INCREMENT COMMENT '部门id',
`department_name` varchar(20) NOT NULL COMMENT '部门名字',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=106 DEFAULT CHARSET=utf8;
/*Data for the table `department` */

insert into `department`(`id`,`department_name`) values (101,'技术部'),
(102,'销售部'),(103,'售后部'),(104,'后勤部'),(105,'运营部');

/*Table structure for table `employee` */
DROP TABLE IF EXISTS `employee`;

CREATE TABLE `employee` (
`id` int(5) NOT NULL AUTO_INCREMENT COMMENT '雇员id',
`last_name` varchar(100) NOT NULL COMMENT '名字',
`email` varchar(100) NOT NULL COMMENT '邮箱',
`gender` int(2) NOT NULL COMMENT '性别1 男, 0 女',
`department` int(3) NOT NULL COMMENT '部门id',
`birth` datetime NOT NULL COMMENT '生日',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1006 DEFAULT CHARSET=utf8;
/*Data for the table `employee` */

insert into
`employee`(`id`,`last_name`,`email`,`gender`,`department`,`birth`) values
(1001,'张三','[email protected]',1,101,'2021-03-06 15:04:33'),(1002,'李
四','[email protected]',1,102,'2021-03-06 15:04:36'),(1003,'王
五','[email protected]',0,103,'2021-03-06 15:04:37'),(1004,'赵
六','[email protected]',1,104,'2021-03-06 15:04:39'),(1005,'孙
七','[email protected]',0,105,'2021-03-06 15:04:45');

CREATE TABLE `user` (
`id` int(3) NOT NULL AUTO_INCREMENT COMMENT '用户id',
`userName` varchar(20) NOT NULL COMMENT '用户名字',
`pwd` varchar(20) NOT NULL COMMENT '用户密码',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
/*Data for the table `user` */

insert into
`user`(`id`,`userName`,`pwd`) values
(1,'admin','123');

3.2、IDEA连接数据库

3.3、编写实体类

• User 类

package com.bobooy.ems.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

/**
 * @author BoBooY
 * @date 2022/9/18 22:17
 */
@Data
@NoArgsConstructor
@AllArgsConstructor
public class User {
    private int id;
    private String userName;
    private String pwd;
}

• Department 类

package com.bobooy.ems.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

//部门类
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Department {
    private Integer id;
    private String departmentName;
}

• Employee 类

package com.bobooy.ems.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.util.Date;

//员工类
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Employee {
    private Integer id;
    private String lastName;
    private String email;
    private Integer gender;
    private Department department;  //这里重点注意类型为 Department
    // @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm")
    private Date birth;
}

3.4、导入 druid 数据源的依赖

<dependency>
    <groupId>com.alibabagroupId>
    <artifactId>druidartifactId>
    <version>1.2.6version>
dependency>

3.5、导入log4j 日志依赖

<dependency>
    <groupId>log4jgroupId>
    <artifactId>log4jartifactId>
    <version>1.2.17version>
dependency>

3.6、配置Druid数据源

• application.yaml

spring:
  datasource:
    username: root
    password: 1234
    url: jdbc:mysql://localhost:3306/springboot?useSSL=true&useUnicode=true&characterEncoding=utf8
    driver-class-name: com.mysql.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource # 自定义数据源

    #数据源
    #Spring Boot 默认是不注入这些属性值的，需要自己绑定
    #druid 数据源专有配置
    initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true
    #配置监控统计拦截的filters，stat:监控统计、log4j：日志记录、wall：防御sql注入
    #如果允许时报错 java.lang.ClassNotFoundException: org.apache.log4j.Priority
    #则导入 log4j 依赖即可，Maven 地址：https://mvnrepository.com/artifact/log4j/log4j
    filters: stat,wall,log4j
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

• 编写配置类 Druid.config

package com.bobooy.ems.config;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

/**
 * @author BoBooY
 * @date 2022/9/17 17:19
 */
@Configuration
public class DruidConfig {
    /**
     * 将自定义的 Druid数据源添加到容器中，不再让 Spring Boot 自动创建
     * 绑定全局配置文件中的 druid 数据源属性到 com.alibaba.druid.pool.DruidDataSource从而让它们生效
     *
     * @ConfigurationProperties(prefix = "spring.datasource")：作用就是将 全局配置文件中
     * 前缀为 spring.datasource的属性值注入到 com.alibaba.druid.pool.DruidDataSource 的同名参数中
     */
    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource druidDataSource() {
        return new DruidDataSource();
    }

    // 配置 Druid 监控管理后台的Servlet；
    // 内置 Servlet 容器时没有web.xml文件，所以使用 Spring Boot 的注册 Servlet 方式
    @Bean
    public ServletRegistrationBean statViewServlet() {
        ServletRegistrationBean bean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
        // 这些参数可以在 com.alibaba.druid.support.http.StatViewServlet的父类 com.alibaba.druid.support.http.ResourceServlet 中找到
        Map<String, String> initParams = new HashMap<>();
        initParams.put("loginUsername", "admin");
        initParams.put("loginPassword", "123456");
        // deny：Druid 后台拒绝谁访问
        // initParams.put("deny", "192.168.1.20");表示禁止此ip访问

        bean.setInitParameters(initParams);
        return bean;
    }
    // 配置 Druid 监控 之  web 监控的 filter
    // WebStatFilter：用于配置Web和Druid数据源之间的管理关联监控统计
    @Bean
    public FilterRegistrationBean webStatFilter() {
        FilterRegistrationBean bean = new FilterRegistrationBean();
        bean.setFilter(new WebStatFilter());
        // exclusions：设置哪些请求进行过滤排除掉，从而不进行统计
        HashMap<String, String> initParams = new HashMap<>();
        initParams.put("exclusions","*.js,*.css,/druid/*,/jdbc/*");
        bean.setInitParameters(initParams);
        // "/*" 表示过滤所有请求
        bean.setUrlPatterns(Arrays.asList("/*"));
        return bean;
    }
}

• 测试

3.7、编写 DAO层

• UserMapper

package com.bobooy.ems.mapper;

import com.bobooy.ems.pojo.User;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;

/**
 * @author BoBooY
 * @date 2022/9/18 22:26
 */
@Mapper
@Repository
public interface UserMapper {
    User getUser(String userName);
}

• 在 resources目录下新建mybatis / mapper目录下新建UserMapper.xml文件

DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.bobooy.ems.mapper.UserMapper">
    <select id="getUserById" resultType="User" parameterType="">
        select * from user where `userName`=#{userName}
    select>
mapper>

3.8、配置 Mybatis

• application.yaml

#配置Mybatis
Mybatis:
  mapper-locations: classpath:mybatis/mapper/*.xml
  type-aliases-package: com.bobooy.ems.pojo

3.9、编写Service层

• UserService

public interface UserService {
    User getUser(String userName);
}

• UserServiceImpl

package com.bobooy.ems.service;

import com.bobooy.ems.mapper.UserMapper;
import com.bobooy.ems.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @author BoBooY
 * @date 2022/9/19 19:39
 */
@Service
public class UserServiceImpl implements UserService{
    @Autowired
    private UserMapper userMapper;

    @Override
    public User getUser(String userName) {
        return userMapper.getUser(userName);
    }
}

3.10、编写Controller层

• UserController

package com.bobooy.ems.controller;

import com.bobooy.ems.mapper.UserMapper;
import com.bobooy.ems.pojo.User;
import com.bobooy.ems.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.*;

import javax.servlet.http.HttpSession;

/**
 * @author BoBooY
 * @date 2022/9/19 17:05
 */
@Controller
public class UserController {
    @Autowired
    UserService userService;

    @PostMapping("/user/login")
    public String login(@RequestParam("username") String userName, @RequestParam("password") String pwd, Model model, HttpSession session) {
        User user = userService.getUser(userName);
        if (user.getUserName().equals(userName) && user.getPwd().equals(pwd)) {
            session.setAttribute("loginUser",user);
            return "redirect:/main.html";
        } else {
            model.addAttribute("msg","用户名或密码错误！");
            return "index";
        }
    }
}

• 编写MVC扩展

registry.addViewController("/main.html").setViewName("dashboard");

3.11、修改前端 顶部栏获取Session

<a class="navbar-brand col-sm-3 col-md-2 mr-0" th:href="@{http://getbootstrap.com/docs/4.0/examples/dashboard/#}" th:text="${session.loginUser.getUserName()}">
a>

3.12、测试

• 登录页面

• 主页面

3、登录拦截

• 编写拦截器LoginHandlerInterceptor

package com.bobooy.ems.config;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * @author BoBooY
 * @date 2022/9/30 19:50
 */
public class LoginHandlerInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        HttpSession session = request.getSession();
        if(session.getAttribute("loginUser") == null) {
            request.setAttribute("msg","您没有权限，请先登录");
            request.getRequestDispatcher("/index.html").forward(request,response);
            return false;
        } else {
            return true;
        }
    }
}

• 在配置类中注册拦截器MyMvcConfig

//配置拦截器
@Override
public void addInterceptors(InterceptorRegistry registry) {
    registry.addInterceptor(new LoginHandlerInterceptor()).addPathPatterns("/**")
        .excludePathPatterns("/","/index.html","/user/login","/css/**","/img/**","/js/**");
}

• 测试

4、员工管理页面

4.1、查询全部员工

DAO层

• 编写EmployeeMapper

package com.bobooy.ems.mapper;

import com.bobooy.ems.pojo.Employee;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;

import java.util.Collection;

/**
 * @author BoBooY
 * @date 2022/9/26 23:23
 */
@Mapper
@Repository
public interface EmployeeMapper {
    //查询全体员工信息
    public Collection<Employee> getAll();
}

• 编写EmployeeMapper.xml

DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.bobooy.ems.mapper.EmployeeMapper">
    <select id="getAll" resultMap="EmployeeDepartment">
        select e.id eid, e.last_Name eName, e.email email, e.gender gender,d.id did,e.birth birth, d.department_name dName
        from employee e
        join department d
        on e.department = d.id
    select>
    <resultMap id="EmployeeDepartment" type="Employee">
        <result property="id" column="eid"/>
        <result property="lastName" column="eName"/>
        <result property="email" column="email"/>
        <result property="gender" column="gender"/>
        <result property="birth" column="birth"/>
        <association property="department" javaType="Department">
            <result property="id" column="did"/>
            <result property="departmentName" column="dName"/>
        association>
    resultMap>
mapper>

service层

• 编写EmployeeService

  package com.bobooy.ems.service;
  
  import com.bobooy.ems.mapper.EmployeeMapper;
  import com.bobooy.ems.pojo.Employee;
  import org.springframework.stereotype.Service;
  
  import java.util.Collection;
  
  /**
   * @author BoBooY
   * @date 2022/9/26 23:44
   */
  public interface EmployeeService {
      //查询全体员工信息
      public Collection<Employee> getAll();
  }
  

  • EmployeeServiceImpl

  package com.bobooy.ems.service;
  
  import com.bobooy.ems.mapper.EmployeeMapper;
  import com.bobooy.ems.pojo.Employee;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Service;
  
  import java.util.Collection;
  
  /**
   * @author BoBooY
   * @date 2022/9/26 23:45
   */
  @Service
  public class EmployeeServiceImpl implements EmployeeService{
      @Override
      public Collection<Employee> getAll() {
          return employeeMapper.getAll();
      }
  }
  

  controller层

  • 编写EmployeeContoller

  package com.bobooy.ems.controller;
  
  import com.bobooy.ems.mapper.EmployeeMapper;
  import com.bobooy.ems.pojo.Employee;
  import com.bobooy.ems.service.EmployeeService;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Controller;
  import org.springframework.ui.Model;
  import org.springframework.web.bind.annotation.GetMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  
  import java.util.Collection;
  
  /**
   * @author BoBooY
   * @date 2022/9/26 23:20
   */
  @Controller
  public class EmployeeController {
      @Autowired
      private EmployeeService employeeService;
  
      @RequestMapping("/emps")
      public String list(Model model) {
          Collection<Employee> employees = employeeService.getAll();
          model.addAttribute("emps",employees);
          return "emp/list";
      }
  }
  

  测试

4.2、添加员工

4.2.1、跳转添加页面

DAO层

• 编写 DepartmentMapper

package com.bobooy.ems.mapper;

import com.bobooy.ems.pojo.Department;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;

import java.util.Collection;

/**
 * @author BoBooY
 * @date 2022/9/27 0:01
 */
@Mapper
@Repository
public interface DepartmentMapper {
    //获取所有部门的信息
    Collection<Department> getDepartments();

    // 通过ID查询部门
    Department getDepartmentById(Integer id);
}

• DepartmentMapper.xml

DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.bobooy.ems.mapper.DepartmentMapper">
    <select id="getDepartments" resultType="Department">
        select * from department
    select>

    <select id="getDepartmentById" resultType="Department" parameterType="Integer">
        select * from department where id = #{id}
    select>
mapper>

• 在 application.yaml中开启 Myabtis 驼峰命名映射 注意空格

  configuration:
    map-underscore-to-camel-case: true #开启驼峰命名

Service层

• DepartmentService

package com.bobooy.ems.service;

import com.bobooy.ems.pojo.Department;

import java.util.Collection;

/**
 * @author BoBooY
 * @date 2022/10/2 10:31
 */
public interface DepartmentService {
    //获取所有部门的信息
    Collection<Department> getDepartments();

    // 通过ID查询部门
    Department getDepartmentById(Integer id);
}

• DepartmentServiceImpl

package com.bobooy.ems.service;

import com.bobooy.ems.mapper.DepartmentMapper;
import com.bobooy.ems.pojo.Department;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Collection;

/**
 * @author BoBooY
 * @date 2022/10/2 10:32
 */
@Service
public class DepartmentServiceImpl implements DepartmentService{
    @Autowired
    private DepartmentMapper departmentMapper;

    @Override
    public Collection<Department> getDepartments() {
        return departmentMapper.getDepartments();
    }

    @Override
    public Department getDepartmentById(Integer id) {
        return departmentMapper.getDepartmentById(id);
    }
}

Controller层

• 在EmployeeController中处理 ”/add“请求

@Autowired
private DepartmentService departmentService;    
@GetMapping("/add")
public String add(Model model) {
    Collection<Department> departments = departmentService.getDepartments();
    model.addAttribute("depts",departments);
    System.out.println(departments);
    return "emp/add";
}

测试

4.2.2、处理添加员工请求

DAO层

• 编写EmployeeMapper

//添加员工
public int save(Employee employee);

• EmployeeMapper.xml

<insert id="save" parameterType="Employee">
    insert into employee(`last_name`, `email`, `gender`, `department`, `birth`)
    values (#{lastName}, #{email}, #{gender}, #{department.id}, #{birth})
insert>

service层

• EmployeeService

//添加员工
public int save(Employee employee);

• EmployeeServiceImpl

@Override
public int save(Employee employee) {
    return employeeMapper.save(employee);
}

controller层

• EmployeeController

//添加员工
@RequestMapping("/addEmp")
public String addEmp(Employee employee) {
    int save = employeeService.save(employee);
    if(save > 0) {
        System.out.println("添加成功！");
    } else {
        System.out.println("添加失败！");
    }
    return "redirect:/emps";
}

设置日期格式

• application.yaml（注意空格）

  #日期格式配置
  mvc:
    format:
      date: yyyy-MM-dd HH:mm

测试：添加员工

成功！

4.3、修改员工

Dao层

• 编写 EmployeeMapper

//修改员工
public int updateEmployee(Employee employee);

// 通过ID查询员工
public Employee getEmployee(Integer id);

• EmployeeMapper.xml

<select id="getEmployee" parameterType="int" resultMap="EmployeeDepartment">
    select e.id eid, e.last_Name eName, e.email email, e.gender gender,d.id did,e.birth birth, d.department_name dName
    from employee e
    join department d
    on e.department = d.id
    where e.id = #{id}
select>

<update id="updateEmployee" parameterType="Employee">
    update employee set `last_name`=#{lastName},`email`=#{email},`gender`=#{gender},`department`=#{department.id},`birth`=#{birth} where `id` = #{id}
update>

service层

• EmployeeService

// 通过ID查询员工
public Employee getEmployee(Integer id);

//修改员工
public int updateEmployee(Employee employee);

• EmployeeServiceImpl

@Override
public Employee getEmployee(Integer id) {
    return employeeMapper.getEmployee(id);
}

@Override
public int updateEmployee(Employee employee) {
    return employeeMapper.updateEmployee(employee);
}

Controller层

• EmployeeController

//跳转修改页面
@GetMapping("/update/{id}")
public String update(@PathVariable("id") int id,Model model) {
    Employee employee = employeeService.getEmployee(id);
    model.addAttribute("emp",employee);
    Collection<Department> departments = departmentService.getDepartments();
    model.addAttribute("departments",departments);
    return "emp/update";
}

//修改员工信息
@PostMapping("/updateEmp")
public String update(Employee employee) {
    int update = employeeService.updateEmployee(employee);
    if(update > 0) {
        System.out.println("修改成功");
    }else {
        System.out.println("修改失败");
    }
    return "redirect:/emps";
}

测试：修改id为 1012 的员工部门为 后勤部 性别为男

• 修改前：

• 修改页面：

• 修改后：

成功！

4.4、删除员工

Dao层

• EmployeeMapper

// 删除员工
public int delete(Integer id);

• EmployeeMapper.xml

<delete id="delete" parameterType="int">
    delete from employee where `id` = #{id}
delete>

service层

• EmployeeService

// 删除员工
public int delete(Integer id);

• EmployeeServiceImpl

@Override
public int delete(Integer id) {
    return employeeMapper.delete(id);
}

controller层

• EmployeeController

//删除员工
@RequestMapping("/delete/{id}")
public String delete(@PathVariable("id") int id) {
    int delete = employeeService.delete(id);
    if(delete > 0)
        System.out.println("删除成功！");
    else {
        System.out.println("删除失败！");
    }
    return "redirect:/emps";
}

测试：删除id为1011的员工

• 删除前

• 删除后

5、退出登录

• UserController

//退出登录
@RequestMapping("/logout")
public String logout(HttpSession session) {
    session.invalidate(); //使当前session失效
    return "redirect:/index.html";
}

• 测试：退出后 直接访问登录页面

项目成功搭建完成！

6、源码链接

GitHub地址：https://github.com/BoBooY-GitHub/EMS
百度网盘地址：https://pan.baidu.com/s/1kNjoxhtyrlBd1ww0RG1jrQ 验证码：g1ex

尾言：到这里本期内容也接近尾声啦，小伙伴们看到这里是不是感觉很简单呢，恭喜你完成了一个SpringBoot基础项目的搭建，后续可以继续往这个项目中添加你想要的功能，也可以当做一个模板来使用，对于初学者来说可以把这个项目当做一个参考，便于以后开发SpringBoot的项目。

最后，创作不易，如果本文的内容对您有帮助，还望客官可以三连支持一下博主，（点赞）+✏️（评论）+⭐️（收藏）是我创作的巨大动力！如果有本项目或者Java相关的问题，可以关注私信一下博主，随时为您解答！再次感谢小伙伴们的支持，我们下期再见！

相关教程：
SpringBoot 快速入门：https://blog.csdn.net/qq_58233406/article/details/126689564
SpringBoot Web开发：https://blog.csdn.net/qq_58233406/article/details/126719171
SpringBoot 整合数据库：https://blog.csdn.net/qq_58233406/article/details/126914820