SpringBoot小練習——用戶登錄、員工增刪改查

實現了用戶的登錄和註銷，登錄進去之後就可以對員工的信息進行增刪改查了，使用了攔截器來攔截沒有登陸的用戶進入其他頁面。

項目結構

頁面

登錄頁面：

員工管理頁面：

新增員工：

修改員工信息：

數據庫信息

用戶信息表：

CREATE TABLE `user1`  (
  `id` int(0) NOT NULL AUTO_INCREMENT,
  `username` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,
  `password` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 2 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;


INSERT INTO `user1` VALUES (1, 'root', '123456');

員工信息表：

CREATE TABLE `employee`  (
  `id` int(0) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,
  `sex` int(0) NOT NULL,
  `position` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,
  `department` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 5 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;


INSERT INTO `employee` VALUES (1, '小張', 1, '程序媛', '技術部');
INSERT INTO `employee` VALUES (2, '小劉', 0, '部門經理', '技術部');
INSERT INTO `employee` VALUES (3, '老王', 1, '碼農', '技術部');

配置

pom.xml：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.lyr</groupId>
    <artifactId>springboot-demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springboot-demo</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.1</version>
        </dependency>

        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-spring</artifactId>
            <version>1.5.2</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

application.yaml：

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/mybatis?useSSL=true&useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
    username: wanide
    password: "000000"

mybatis:
  type-aliases-package: com.lyr.pojo
  mapper-locations: classpath:mapper/*.xml

實體類

User：

package com.lyr.pojo;

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

@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
    private int id;
    private String username;
    private String password;
    private Employee employee;
}

Employee：

package com.lyr.pojo;

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;   //職位
    private String department;   //部門
}

mapper層

UserMapper：

package com.lyr.mapper;

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

@Mapper
@Repository
public interface UserMapper {

    //根據用戶名獲取用戶信息
    User getUserByName(String username);
}

EmployeeMapper：

package com.lyr.mapper;

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

import java.util.List;

@Mapper
@Repository
public interface EmpMapper {

    //查詢所有員工信息
    List<Employee> getAllEmp();

    //新增員工信息
    int addEmp(Employee employee);

    //刪除員工
    int deleteEmp(String name);

    //更新員工信息
    int updateEmp(Employee employee);

    //根據員工姓名查詢員工信息
    Employee getEmpByName(String name);
}

UserMapper.xml：

<?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">
<mapper namespace="com.lyr.mapper.UserMapper">
    <select id="getUserByName" resultType="User">
        select * from user1 where username=#{username}
    </select>
</mapper>

EmployeeMapper.xml：

<?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">
<mapper namespace="com.lyr.mapper.EmpMapper">
    <select id="getAllEmp" resultType="Employee">
        select * from employee
    </select>

    <insert id="addEmp" parameterType="Employee">
        insert into employee (name,sex,position,department) values (#{name},#{sex},#{position},#{department})
    </insert>

    <delete id="deleteEmp" parameterType="String">
        delete from employee where name=#{name}
    </delete>

    <update id="updateEmp" parameterType="Employee">
        update employee set name=#{name},sex=#{sex},position=#{position},department=#{department} where id=#{id}
    </update>

    <select id="getEmpByName" parameterType="String" resultType="Employee">
        select * from employee where name=#{name}
    </select>
</mapper>

Controller層

UserController類：

package com.lyr.controller;

import com.lyr.pojo.Employee;
import com.lyr.pojo.User;
import com.lyr.service.EmpService;
import com.lyr.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;
import java.util.List;

@Controller
public class UserController {
    
    @Autowired
    private UserService userService;
    @Autowired
    private EmpService empService;

    @RequestMapping({"/","/index"})
    public String toLogin(){
        return "index";
    }

    @RequestMapping("/login")
    public String login(String username, String password, Model model, HttpSession session){
            User user = userService.getUserByName(username);
            //用戶存在時
            if(user!=null){
                //用戶名密碼都正確時
                if (password.equals(user.getPassword())){
                    List<Employee> allEmp = empService.getAllEmp();
                    session.setAttribute("userInfo",username);
                    return "redirect:/showAll";
                }else {
                    //密碼不正確時
                    model.addAttribute("msg","用戶名或者密碼錯誤");
                    return "index";
                }
            }else {
                model.addAttribute("msg","用戶名或者密碼錯誤");
                return "index";
            }
    }

    @RequestMapping("/logout")
    public String logout(HttpSession session){
        //註銷用戶
        session.invalidate();
        return "index";
    }
}

EmpController：

package com.lyr.controller;


import com.lyr.pojo.Employee;
import com.lyr.service.EmpService;
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 javax.servlet.http.HttpSession;
import java.util.List;

@Controller
public class EmpController {
    @Autowired
    private EmpService empService;

    //查詢員工
    @RequestMapping("/queryEmp")
    public String showEmployee(String name, Model model){
        if(!name.equals("")){
            Employee emp = empService.getEmpByName(name);
            model.addAttribute("emp",emp);
            return "show";
        }else {
            //輸入爲空時顯示所有用戶
            return "redirect:/showAll";
        }

    }

    //查詢所有用戶
    @RequestMapping("/showAll")
    public String showAll(Model model){
        List<Employee> allEmp = empService.getAllEmp();
        model.addAttribute("emp",allEmp);
        return "show";
    }

    //新增用戶信息
    @RequestMapping("/toAddEmp")
    public String toAddEmp(){
        return "addEmp";
    }

    @RequestMapping("/addEmp")
    public String addEmp(Employee employee){
        empService.addEmp(employee);
        return "show";
    }

    //跳轉到修改用戶信息頁面
    @RequestMapping("/toUpdate/{name}")
    public String toUpdate(@PathVariable("name")String name,Model model){
        Employee emp = empService.getEmpByName(name);
        model.addAttribute("emp",emp);
        return "updateEmp";
    }

    //修改員工信息
    @RequestMapping("/updateEmp")
    public String updateEmp(Employee employee,Model model){
        empService.updateEmp(employee);
        return "show";
    }

    //刪除用戶信息
    @RequestMapping("/deleteEmp/{name}")
    public String deleteEmp(@PathVariable("name")String name){
        empService.deleteEmp(name);
        return "show";
    }


}

攔截器

自定義攔截器userInterceptor：

package com.lyr.config;

import org.springframework.web.servlet.HandlerInterceptor;

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

public class userInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        Object userInfo = request.getSession().getAttribute("userInfo");

        //沒有session信息，也就是沒登陸，不放行
        if(userInfo == null){
            request.setAttribute("msg","沒有權限，請先登錄");
            request.getRequestDispatcher("/").forward(request,response);
            return false;
        }
        return true;
    }
}

myMvcConfig類：

package com.lyr.config;

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

@Configuration
public class myMvcConfig implements WebMvcConfigurer {

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //攔截所有頁面除了"/index","/","/login","/css/**","/img/**"
        registry.addInterceptor(new userInterceptor()).addPathPatterns("/**")
                .excludePathPatterns("/index","/","/login","/css/**","/img/**");
    }
}

前端html和service層可以去GitHub查看完整代碼。

GitHub地址：https://github.com/wanide/SpringBoot-Demo

SpringBoot小練習——用戶登錄、員工增刪改查

項目結構

頁面

數據庫信息

配置

實體類

mapper層

Controller層

攔截器

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我通過CKA和CKS啦！

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