基于SpringBoot项目，手把手快速搭建员工管理系统

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！