Java毕业设计实战之校园一卡通系统的实现

一、项目简述（+需求文档+ppt）

功能：卡管理，卡消费，卡充值，图书借阅，消费，记录，注销等等功能。

二、项目运行

环境配置：

jdk1.8 + tomcat8.5 + mysql + eclispe（intellij idea,eclispe,myeclispe,sts都支持）

项目技术：

jsp + servlet + html+ css + javascript + jquery + ajax 等等

用户管理操作控制层:

/**
 * 用户管理操作
 */
@controller
@requestmapping("/user")
public class usercontroller {
 
    @autowired
    private userservice userservice;
 
    /**
     * 用户添加页面
     * @return
     */
    @getmapping("/add")
    public string create() {
        return "user/add";
    }
 
    /**
     * 用户添加操作
     * @param user
     * @return
     */
    @postmapping("/add")
    @responsebody
    public map<string, object> add(@requestbody user user) {
        if(stringutils.isempty(user.getusername())){
            return mapcontrol.getinstance().error("请填写用户名").getmap();
        }
        if(stringutils.isempty(user.getname())){
            return mapcontrol.getinstance().error("请填写名称").getmap();
        }
        if(stringutils.isempty(user.getuserpwd())){
            return mapcontrol.getinstance().error("请填写密码").getmap();
        }
        int result = userservice.create(user);
        if (result <= 0) {
            return mapcontrol.getinstance().error().getmap();
        }
        return mapcontrol.getinstance().success().getmap();
    }
 
    /**
     * 根据id删除
     * @param id
     * @return
     */
    @postmapping("/delete/{id}")
    @responsebody
    public map<string, object> delete(@pathvariable("id") integer id) {
        int result = userservice.delete(id);
        if (result <= 0) {
            return mapcontrol.getinstance().error().getmap();
        }
        return mapcontrol.getinstance().success().getmap();
    }
 
    //批量删除
    @postmapping("/delete")
    @responsebody
    public map<string, object> delete(string ids) {
        int result = userservice.delete(ids);
        if (result <= 0) {
            return mapcontrol.getinstance().error().getmap();
        }
        return mapcontrol.getinstance().success().getmap();
    }
 
    /**
     * 编辑用户信息操作
     * @param user
     * @return
     */
    @postmapping("/edit")
    @responsebody
    public map<string, object> edit(@requestbody user user) {
        if(stringutils.isempty(user.getusername())){
            return mapcontrol.getinstance().error("请填写用户名").getmap();
        }
        if(stringutils.isempty(user.getname())){
            return mapcontrol.getinstance().error("请填写名称").getmap();
        }
        if(stringutils.isempty(user.getuserpwd())){
            return mapcontrol.getinstance().error("请填写密码").getmap();
        }
        int result = userservice.update(user);
        if (result <= 0) {
            return mapcontrol.getinstance().error().getmap();
        }
        return mapcontrol.getinstance().success().getmap();
    }
 
    /**
     * 根据id查询，跳转修改页面
     * @param id
     * @param modelmap
     * @return
     */
    @getmapping("/edit/{id}")
    public string edit(@pathvariable("id") integer id, modelmap modelmap) {
        user user = userservice.detail(id);
        modelmap.addattribute("user", user);
        return "user/edit";
    }
 
    //查询所有
    @postmapping("/query")
    @responsebody
    public map<string, object> query(@requestbody user user) {
        list<user> list = userservice.query(user);
        integer count = userservice.count(user);
        return mapcontrol.getinstance().success().page(list, count).getmap();
    }
 
    //跳转列表页面
    @getmapping("/list")
    public string list() {
        return "user/list";
    }
 
}

登录控制层：

@controller
public class logincontroller {
 
    @autowired
    private userservice userservice;
    @autowired
    private teacherservice teacherservice;
    @autowired
    private studentservice studentservice;
 
    //跳转登录页面
    @getmapping("/login")
    public string login() {
        return "login";
    }
 
    //登录操作
    @postmapping("/login")
    @responsebody
    public map<string, object> login(string username, string password, string captcha, string type, httpsession session) {
        //判断用户名、密码、用户类型、验证码是否为空
        if (stringutils.isempty(username) || stringutils.isempty(password) || stringutils.isempty(captcha) || stringutils.isempty(type)) {
            return mapcontrol.getinstance().error("用户名或密码不能为空").getmap();
        }
        //获取系统生成的验证码
        string _captcha = (string) session.getattribute("captcha");
        //先判断验证码是否正确
        if (!(captcha.tolowercase()).equals(_captcha.tolowercase())) {
            //验证码错误
            return mapcontrol.getinstance().error("验证码错误").getmap();
        }
 
        //判断用户类型
        if ("1".equals(type)) { //管理员验证登录
            user user = userservice.login(username, md5utils.getmd5(password)); //对密码进行加密处理，因为数据库中存储的是加密后的密码
            if (user != null) {
                session.setattribute("user", user);
                session.setattribute("type", 1);
                return mapcontrol.getinstance().success().add("data", user).getmap();
            } else {
                return mapcontrol.getinstance().error("用户名或密码错误").getmap();
            }
        }
        if ("2".equals(type)) { //老师验证登录
            teacher teacher = teacherservice.login(username, md5utils.getmd5(password));
            if (teacher != null) {
                session.setattribute("user", teacher);
                session.setattribute("type", "2");
                return mapcontrol.getinstance().success().add("data", teacher).getmap();
            } else {
                return mapcontrol.getinstance().error("用户名或密码错误").getmap();
            }
        }
        if ("3".equals(type)) { //学生验证登录
            student student = studentservice.login(username, md5utils.getmd5(password));
            if (student != null) {
                session.setattribute("user", student);
                session.setattribute("type", "3");
                return mapcontrol.getinstance().success().add("data", student).getmap();
            } else {
                return mapcontrol.getinstance().error("用户名或密码错误").getmap();
            }
        }
        return mapcontrol.getinstance().getmap();
    }
 
}

生成验证码：

@controller
@requestmapping("/captcha")
public class captchacontroller {
 
    private char[] codesequence = {'a', '1', 'b', 'c', '2', 'd', '3', 'e', '4', 'f', '5', 'g', '6', 'h', '7', 'i', '8', 'j',
            'k', '9', 'l', '1', 'm', '2', 'n', 'p', '3', 'q', '4', 'r', 's', 't', 'u', 'v', 'w',
            'x', 'y', 'z'};
 
    @requestmapping("/code")
    public void getcode(httpservletresponse response, httpsession session) throws ioexception {
        int width = 80;
        int height = 37;
        random random = new random();
        //设置response头信息
        //禁止缓存
        response.setheader("pragma", "no-cache");
        response.setheader("cache-control", "no-cache");
        response.setdateheader("expires", 0);
 
        //生成缓冲区image类
        bufferedimage image = new bufferedimage(width, height, 1);
        //产生image类的graphics用于绘制操作
        graphics g = image.getgraphics();
        //graphics类的样式
        g.setcolor(this.getcolor(200, 250));
        g.setfont(new font("times new roman", 0, 28));
        g.fillrect(0, 0, width, height);
        //绘制干扰线
        for (int i = 0; i < 40; i++) {
            g.setcolor(this.getcolor(130, 200));
            int x = random.nextint(width);
            int y = random.nextint(height);
            int x1 = random.nextint(12);
            int y1 = random.nextint(12);
            g.drawline(x, y, x + x1, y + y1);
        }
 
        //绘制字符
        string strcode = "";
        for (int i = 0; i < 4; i++) {
            string rand = string.valueof(codesequence[random.nextint(codesequence.length)]);
            strcode = strcode + rand;
            g.setcolor(new color(20 + random.nextint(110), 20 + random.nextint(110), 20 + random.nextint(110)));
            g.drawstring(rand, 13 * i + 6, 28);
        }
        //将字符保存到session中用于前端的验证
        session.setattribute("captcha", strcode.tolowercase());
        g.dispose();
 
        imageio.write(image, "jpeg", response.getoutputstream());
        response.getoutputstream().flush();
    }
 
    public color getcolor(int fc, int bc) {
        random random = new random();
        if (fc > 255)
            fc = 255;
        if (bc > 255)
            bc = 255;
        int r = fc + random.nextint(bc - fc);
        int g = fc + random.nextint(bc - fc);
        int b = fc + random.nextint(bc - fc);
        return new color(r, g, b);
    }
 
}

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