[Java知识库]springboot小项目，设备管理系统，适合练手(源码+SQL)

本文完整项目的代码：

github：https://github.com/caohanzong/springboot-device-management.git
gitee:https://gitee.com/caohanzong/springboot-device-management.git

1、项目页面

1、登录页面：

注：用户名密码登录，登录完成之后才可进入页面。中英文切换功能。

2、设备管理系统首页：

3、实现简单的增删改查的功能：
4、对借设备的人的处理：

2、数据库方面

1、user表：

2、equip设备表：

3、borrower表：

3、代码目录

4、关键代码

1、sql语言

CREATE DATABASE `easy`
USE `easy`

DROP TABLE IF EXISTS `user`;
CREATE TABLE `user`(
    `username` VARCHAR(32) NOT NULL,
    `password` VARCHAR(32) NOT NULL
)DEFAULT CHARSET=utf8;

DROP TABLE IF EXISTS `borrower`;
CREATE TABLE `borrower`(
    `id` INT(6) NOT NULL AUTO_INCREMENT,
    `borrowerName` VARCHAR(32) NOT NULL,
    PRIMARY KEY(`id`)
)DEFAULT CHARSET=utf8;

DROP TABLE IF EXISTS `equip`;
CREATE TABLE `equip`(
    `id` INT(6) NOT NULL AUTO_INCREMENT,
    `name` VARCHAR(32) NOT NULL,
    `serial` INT(6) NOT NULL,
    `state` INT(6) NOT NULL,
    `borrower` VARCHAR(32) NOT NULL,
    `date`  VARCHAR(32) NOT NULL,
    PRIMARY KEY(`id`)
)DEFAULT CHARSET=utf8;


INSERT  INTO `user`(`username`,`password`) VALUES ('admin','123456');

INSERT INTO `borrower`(`id`,`borrowerName`) VALUES (001,'uzi');
INSERT INTO `borrower`(`id`,`borrowerName`) VALUES (002,'lwx');
INSERT INTO `borrower`(`id`,`borrowerName`) VALUES (003,'灯红酒绿');

INSERT INTO `easy`.`equip` (`id`, `name`, `serial`, `state`, `borrower`, `date`) VALUES ('1', '设备1', '195778', '0', 'uzi', '2001-01-01');
INSERT INTO `easy`.`equip` (`id`, `name`, `serial`, `state`, `borrower`, `date`) VALUES ('2', 'y7000p', '000001', '1', '灯红酒绿', '2020-02-02');
INSERT INTO `easy`.`equip` (`id`, `name`, `serial`, `state`, `borrower`, `date`) VALUES ('3', '飞机', '345345', '1', 'lwx', '1999-07-21');
INSERT INTO `easy`.`equip` (`id`, `name`, `serial`, `state`, `borrower`, `date`) VALUES ('4', '打印机', '55', '1', 'lwx', '2011-05-11');
INSERT INTO `easy`.`equip` (`id`, `name`, `serial`, `state`, `borrower`, `date`) VALUES ('5', '飞行堡垒', '45235', '0', 'uzi', '2021-10-17');
INSERT INTO `easy`.`equip` (`id`, `name`, `serial`, `state`, `borrower`, `date`) VALUES ('6', '罗技', '89769', '0', '灯红酒绿', '2019-01-01');

2、EquipController层

package com.chz.controller;


import com.chz.mapper.BorrowerMapper;
import com.chz.mapper.EquipMapper;
import com.chz.pojo.Borrower;
import com.chz.pojo.Equip;
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.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpSession;
import java.util.List;

/**
 * @author snicker
 * @date 2021/10/17 15:57
 * @Describe
 */
@Controller
public class EquipController {
    @Autowired
    EquipMapper equipMapper;
    @Autowired
    BorrowerMapper borrowerMapper;

    @RequestMapping("/emps")
    public String list(Model model){
        List<Equip> equips=equipMapper.queryEquipList();
        model.addAttribute("emps",equips);
        return "emp/list";
    }
    @GetMapping("/delete/{id}")
    public String delete(@PathVariable("id") int id){
        equipMapper.deleteEquip(id);
        return "redirect:/emps";
    }
    @GetMapping("/emp")
    public String toAddPage(Model model){
        List<Borrower> borrowers=borrowerMapper.queryBorrowerList();
        model.addAttribute("borrowers",borrowers);
        return "emp/add";
    }
    @PostMapping("/emp")
    public String addEmp(Equip equip){
        equipMapper.addEquip(equip);
        return "redirect:/emps";
    }
    @GetMapping("/update/{id}")
    public String toUpdatePage(Model model,@PathVariable("id") int id){
        Equip equip=equipMapper.queryEquipById(id);
        model.addAttribute("equip",equip);
        List<Borrower> borrowers=borrowerMapper.queryBorrowerList();
        model.addAttribute("borrowers",borrowers);
        return "emp/update";
    }
    @PostMapping("/update")
    public String update(Equip equip){
        equipMapper.updateEquip(equip);
        return "redirect:emps";
    }
    @RequestMapping("/user/logout")
    public String logout(HttpSession session){
        session.invalidate();
        return "index";
    }
}

2、EquipMapper.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.chz.mapper.EquipMapper">
    <select id="queryEquipList" resultType="Equip">
        select * from easy.equip;
    </select>

    <select id="queryEquipById" resultType="Equip">
        select * from easy.equip where id = #{id};
    </select>
    
    <insert id="addEquip" parameterType="Equip">
        insert into easy.equip(name,serial,state,borrower,date)
        values (#{name},#{serial},#{state},#{borrower},#{date})
    </insert>

    <update id="updateEquip" parameterType="Equip">
        update easy.equip set name=#{name},serial=#{serial},state=#{state},borrower=#{borrower},date=#{date}
        where id=#{id}
    </update>

    <delete id="deleteEquip" parameterType="Equip">
        delete from easy.equip where id = #{id}
    </delete>
</mapper>

给出部分核心代码，剩余代码没有一一列举，如果感兴趣可以到github上面下载

5、补充功能

1、谷歌验证码的实现

1、导入maven
2、在config层中添加KaptchaConfig（即 kaptcha 的配置文件）：

package com.chz.config;

import com.google.code.kaptcha.impl.DefaultKaptcha;
import com.google.code.kaptcha.util.Config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.Properties;

@Configuration
public class KaptchaConfig {
    @Bean
    public DefaultKaptcha getDefaultKaptcha(){
        DefaultKaptcha captchaProducer = new DefaultKaptcha();
        Properties properties = new Properties();
        properties.setProperty("kaptcha.border", "yes");
        properties.setProperty("kaptcha.border.color", "105,179,90");
        properties.setProperty("kaptcha.textproducer.font.color", "blue");
        properties.setProperty("kaptcha.image.width", "110");
        properties.setProperty("kaptcha.image.height", "40");
        properties.setProperty("kaptcha.textproducer.font.size", "30");
        properties.setProperty("kaptcha.session.key", "code");
        properties.setProperty("kaptcha.textproducer.char.length", "4");
        properties.setProperty("kaptcha.textproducer.font.names", "宋体,楷体,微软雅黑");
        Config config = new Config(properties);
        captchaProducer.setConfig(config);
        return captchaProducer;

    }
}

3、在controller层中添加CodeController（验证码控制层，生成验证码）：

package com.chz.controller;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Properties;

/**
 * @author snicker
 * @date 2021/10/17 15:14
 * @Describe
 */
@Controller
public class CodeController {
    @Autowired
    private Producer captchaProducer=null;
    @RequestMapping("/kaptcha")
    public void getKaptchaImage(HttpServletRequest request, HttpServletResponse response) throws IOException {
        HttpSession session = request.getSession();
        response.setDateHeader("Expires", 0);
        response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
        response.addHeader("Cache-Control", "post-check=0, pre-check=0");
        response.setHeader("Pragma", "no-cache");
        response.setContentType("image/jpeg");
        //生成验证码
        String capText=captchaProducer.createText();
        session.setAttribute(Constants.KAPTCHA_SESSION_KEY,capText);
        //向客户端写出
        BufferedImage bi = captchaProducer.createImage(capText);
        ServletOutputStream out = response.getOutputStream();
        ImageIO.write(bi, "jpg", out);
        try {
            out.flush();
        } finally {
            out.close();
        }
    }
}

4、在controller层中添加CodeUtil（验证码控制层，校对验证码）：

package com.chz.controller;

import javax.servlet.http.HttpServletRequest;

/**
 * @author snicker
 * @date 2021/10/17 15:21
 * @Describe
 */

public class CodeUtil {

    //将获取到的前端参数转为string类型
    public static String getString(HttpServletRequest request, String key) {
        try {
            String result = request.getParameter(key);
            if(result != null) {
                result = result.trim();
            }
            if("".equals(result)) {
                result = null;
            }
            return result;
        }catch(Exception e) {
            return null;
        }
    }

    //验证码校验
    public static boolean checkVerifyCode(HttpServletRequest request) {
        //获取生成的验证码
        String verifyCodeExpected = (String) request.getSession().getAttribute(com.google.code.kaptcha.Constants.KAPTCHA_SESSION_KEY);
        //获取用户输入的验证码
        String verifyCodeActual = CodeUtil.getString(request, "verifyCodeActual");
        if(verifyCodeActual == null ||!verifyCodeActual.equals(verifyCodeExpected)) {
            return false;
        }
        return true;
    }
}

5、在controller层中添加LoginController（登录时判断用户名、密码、和验证码是否正确）：

package com.chz.controller;

import com.chz.mapper.UserMapper;
import com.chz.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.stereotype.Repository;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.util.List;

/**
 * @author snicker
 * @date 2021/10/16 19:14
 * @Describe
 */
@Controller
public class LoginController {

    @Autowired
    UserMapper userMapper;

    @RequestMapping("/user/login")
    public String login(@RequestParam("username") String username, @RequestParam("password") String password, Model model, HttpSession session, HttpServletRequest request){
        List<User>users=userMapper.UserList();
        for(User user:users){
            String username1=user.getUsername();
            String password1=user.getPassword();
            if(username1.equals(username) && password1.equals(password) && CodeUtil.checkVerifyCode(request)){
                session.setAttribute("loginUser",username);
                return "redirect:/main.html";
            }else if(!CodeUtil.checkVerifyCode(request)){
                model.addAttribute("msg","验证码错误");
            } else{
                model.addAttribute("msg","用户名或者密码错误");
                continue;
            }
        }
        return "index";
    }
}

6、前端代码中验证码的显示

<input type="text" name="verifyCodeActual" class="form-control" th:placeholder="#{login.verify}" style=" width: 289px;position: relative;left: -55px;margin: auto">

<div class="item-input" style="width: 120px;height: 50px;margin: auto;position: relative;top:-39px;right: -145px">
	<img id="captcha_img" alt="点击更换" title="点击更换"
		 onclick="refresh()" src="/kaptcha" />
</div>

2、i18n国际化的实现

1、i18n的文件内容



2、前端代码显示设置
3、config层的配置文件MyLocaleResolver：

package com.chz.config;


import org.springframework.util.StringUtils;
import org.springframework.web.servlet.LocaleResolver;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Locale;

public class MyLocaleResolver implements LocaleResolver {
    @Override
    public Locale resolveLocale(HttpServletRequest request) {
        //获取请求中的语言参数
        String language = request.getParameter("l");
        Locale locale = Locale.getDefault();
        if(!StringUtils.isEmpty(language)){
            String[] split = language.split("_");
            locale = new Locale(split[0],split[1]);
        }

        return locale;
    }

    @Override
    public void setLocale(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Locale locale) {

    }
}