JavaWeb学习——SSM框架实现登陆、注册与增删查改

1.各项配置

1. 依赖配置（pom.xml）

    <dependencies>

        
        <dependency>
            <groupId>junitgroupId>
            <artifactId>junitartifactId>
            <version>4.13.2version>
            <scope>testscope>
        dependency>

        
        <dependency>
            <groupId>javax.servletgroupId>
            <artifactId>javax.servlet-apiartifactId>
            <version>3.1.0version>
            <scope>providedscope>
        dependency>

        
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <version>8.0.28version>
            <scope>runtimescope>
        dependency>

        
        <dependency>
            <groupId>org.mybatisgroupId>
            <artifactId>mybatisartifactId>
            <version>3.4.6version>
        dependency>
        <dependency>
            <groupId>org.mybatisgroupId>
            <artifactId>mybatis-springartifactId>
            <version>1.3.1version>
        dependency>
        <dependency>
            <groupId>org.aspectjgroupId>
            <artifactId>aspectjweaverartifactId>
            <version>1.8.7version>
        dependency>

        
        
        <dependency>
            <groupId>com.alibabagroupId>
            <artifactId>druidartifactId>
            <version>1.2.8version>
        dependency>

        
        
        <dependency>
            <groupId>org.jsoupgroupId>
            <artifactId>jsoupartifactId>
            <version>1.11.2version>
        dependency>

        
        
        <dependency>
            <groupId>com.fasterxml.jackson.coregroupId>
            <artifactId>jackson-databindartifactId>
            <version>2.9.0version>
        dependency>
        
        <dependency>
            <groupId>com.fasterxml.jackson.coregroupId>
            <artifactId>jackson-coreartifactId>
            <version>2.9.0version>
        dependency>
        
        <dependency>
            <groupId>com.fasterxml.jackson.coregroupId>
            <artifactId>jackson-annotationsartifactId>
            <version>2.9.0version>
        dependency>

        
        
        <dependency>
            <groupId>jstlgroupId>
            <artifactId>jstlartifactId>
            <version>1.2version>
        dependency>

        
        <dependency>
            <groupId>commons-beanutilsgroupId>
            <artifactId>commons-beanutilsartifactId>
            <version>1.9.4version>
        dependency>


        
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-webmvcartifactId>
            <version>5.1.10.RELEASEversion>
        dependency>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-webartifactId>
            <version>5.1.10.RELEASEversion>
        dependency>

        
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-contextartifactId>
            <version>5.1.10.RELEASEversion>
        dependency>

        
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-jdbcartifactId>
            <version>5.1.10.RELEASEversion>
        dependency>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-txartifactId>
            <version>5.1.10.RELEASEversion>
        dependency>
    dependencies>

2. web配置(web.xml)

    <context-param>
        <param-name>contextConfigLocationparam-name>
        <param-value>classpath:applicationContext.xmlparam-value>
    context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
    listener>

    
    <filter>
        <filter-name>CharacterEncodingFilterfilter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
        <init-param>
            <param-name>encodingparam-name>
            <param-value>UTF-8param-value>
        init-param>
    filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilterfilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>

    
    <servlet>
        <servlet-name>DispatcherServletservlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
        <init-param>
            <param-name>contextConfigLocationparam-name>
            <param-value>classpath:spring-mvc.xmlparam-value>
        init-param>
        
        <load-on-startup>1load-on-startup>
    servlet>
    
    <servlet-mapping>
        <servlet-name>DispatcherServletservlet-name>
        <url-pattern>/url-pattern>
    servlet-mapping>

3. Spring配置（applicationContext.xml）

    <context:component-scan base-package="com.Rendan">
        
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    context:component-scan>

    
    <context:property-placeholder location="classpath:druid.properties"/>

    
    <bean id="druidDataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="url" value="${druid.url}">property>
        <property name="username" value="${druid.username}">property>
        <property name="password" value="${druid.password}">property>
        <property name="driverClassName" value="${druid.driverClassName}">property>
        <property name="initialSize" value="${druid.initialSize}">property>
        <property name="maxActive" value="${druid.maxActive}">property>
        <property name="maxWait" value="${druid.maxWait}">property>
    bean>

    
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="druidDataSource">property>
        
        <property name="configLocation" value="classpath:sqlMapConfig.xml">property>
    bean>

    
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.Rendan.mapper">property>
    bean>

4. SpringMV配置(spring-mvc.xml)

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
                            http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
                                 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">


    <mvc:annotation-driven/>

    
    <context:component-scan base-package="com.Rendan.web"/>

    
    <mvc:default-servlet-handler/>

beans>

5. Mybatis配置

核心文件

DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>

    
    <typeAliases>
        <package name="com.Rendan.domain"/>
    typeAliases>


configuration>

实现接口配置(sql语句)

DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.Rendan.mapper.MangerMapper">
    <select id="findAll" resultType="user">
        select *
        from user
    select>

    <select id="manger_login" parameterType="manger" resultType="manger">
        select *
        from manger
        where mangerName = #{mangerName}
          and password = #{password}
    select>

    <insert id="addUser" parameterType="user">
        insert into user
        values (null, #{userName}, #{gender}, #{age}, #{tel}, #{password})
    insert>

    <select id="findAllFood" resultType="food">
        select *
        from food
    select>

    <insert id="addFood" parameterType="food">
        insert into food
        values (null, #{foodName}, #{foodDescription}, #{price}, #{unit})
    insert>

    <select id="findFoodById" parameterType="int" resultType="food">
        select *
        from food
        where id = #{id}
    select>

    <update id="updateFood" parameterType="food">
        update food
        set foodName        = #{foodName},
            foodDescription = #{foodDescription},
            price           = #{price},
            unit            = #{unit}
        where id = #{id}
    update>

    <delete id="deleteFoodById" parameterType="int">
        delete
        from food
        where id = #{id}
    delete>

    <select id="findFoodsById" parameterType="int" resultType="food">
        select *
        from user_food uf,
             food f
        where uf.foodId = f.id
          and uf.userId = #{id}
    select>


mapper>

2.视图层

1. 登陆视图层

<body>
<%--动态获取虚拟目录--%>
<form action="${pageContext.request.contextPath}/manger/login" method="post">
    <div class="wapper">
        <img class="logo" src="../images/logo-main.jpg">
        <h2>你好管理员!h2>
        <div class="a">
            <span>用户名:span>
            <input class="user" type="text" placeholder="请输入用户名" name="mangerName"><br>
        div>
        <div class="b">
            <span>密 码:span>
            <input class="user" type="password" placeholder="请输入密码" name="password"><br>
        div>
        <input class="three" type="submit" value="登 录">

        <div class="focus">
            <%--el获取域中数据--%>
            <%--验证码--%>
            ${requestScope.cc_error}
            <%--用户名与密码--%>
            ${requestScope.longin_error}
            <%--登录过滤器--%>
            ${requestScope.login_msg}
        div>

    div>



    <%
        //获取所有Cookie
        Cookie[] cookies = request.getCookies();
        boolean flag = false;//没有cookie为lastTime
        if (cookies != null && cookies.length > 0) {
            for (Cookie cookie : cookies) {
                //获取cookie名称
                String name = cookie.getName();
                if ("lastTime".equals(name)) {
                    flag = true;
                    //有该cookie,不是第一次访问

                    //响应数据
                    //获取cookie的value实际时间
                    String time = cookie.getValue();

                    //URL解码
                    time = URLDecoder.decode(time, "utf-8");


    %>
    <div class="time">
        <span>欢迎回来,您上次访问的时间为: <%= time%> span>
    div>

    <%

                    //设置cookie的value
                    //获取当前时间字符,重新设置Cookie,重新发送Cookie
                    Date date = new Date();
                    SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日 HH:mm:ss");
                    String str_date = sdf.format(date);
                    //URL编码解决特殊字符无法识别
                    str_date = URLEncoder.encode(str_date, "utf-8");
                    cookie.setValue(str_date);
                    //设置cookie存活时间
                    cookie.setMaxAge(60 * 60 * 24 * 30);//一个月
                    response.addCookie(cookie);

                    break;

                }
            }
        }
        if (cookies == null || cookies.length == 0 || flag == false) {
            //没有 第一次访问
            Date date = new Date();
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日 HH:mm:ss");
            String str_date = sdf.format(date);
            //URL编码解决特殊字符无法识别
            str_date = URLEncoder.encode(str_date, "utf-8");
            Cookie cookie = new Cookie("lastTime", str_date);
            //设置cookie存活时间
            cookie.setMaxAge(60 * 60 * 24 * 30);//一个月
            response.addCookie(cookie);
    %>
    <div class="time">
        <span>您好,欢迎首次访问!!!span>
    div>

    <%
        }
    %>
form>

2. 操作视图层

    <script>
        function deleteUser(userId) {
            //用户安全提示
            if (confirm("您当真要删除?")){
                //访问路径执行删除
                location.href="${pageContext.request.contextPath}/deleteUser/"+userId;
            }
        }
    script>
head>
<body>
<div class="wapper">
    <h2>用户信息列表h2>

    <table border="1" class="a">
        <tr class="a1">
            <th>idth>
            <th>用户名th>
            <th>性别th>
            <th>年龄th>
            <th>电话号th>
            <th>密码th>
            <th>订单th>
            <th>操作th>
        tr>
<%--jstl简化java书写遍历--%>
        <c:forEach items="${users}" var="user" varStatus="s">
            <tr>
                <td>  ${s.count}  td>
                <td>  ${user.userName}  td>
                <td>  ${user.gender}  td>
                <td>  ${user.age}  td>
                <td>${user.tel}td>
                <td>  ${user.password}  td>
                <td>
                    <c:forEach items="${user.foods}" var="food">
                          ${food.foodName}
                    c:forEach>
                td>
                <td>
                    <a class="cha" href="${pageContext.request.contextPath}/manger/findUserById?id=${user.id}">修改a> 
                    <a class="dle" href="javascript:deleteUser(${user.id})">删除a>
                    <a class="check" href="${pageContext.request.contextPath}/findUserOrder">查询订单a>
                td>
            tr>
        c:forEach>

    table>
    <a class="add" href="${pageContext.request.contextPath}/user/add.jsp">添加用户a>
    <a class="return"href="${pageContext.request.contextPath}/manger/manger.jsp">返回a>
div>
body>

3.web层

@Controller
@RequestMapping("/manger")
public class MangerController {

    @Autowired
    private MangerService mangerService;

    @Autowired
    private UserService userService;

    @RequestMapping("/login")
    public String login(Manger manger, HttpSession session, Model model) {
        try {
            Manger manger_login = mangerService.manger_login(manger);
            //登录成功
            //储存用户信息
            session.setAttribute("manger", manger_login.getMangerName());
            //重定向到succes.jsp页面
            return "redirect:/manger/manger.jsp";
        } catch (Exception e) {
            e.printStackTrace();
            //登录失败
            //储存提示信息到request
            model.addAttribute("longin_error", "用户名或密码错误!");
            //转发到登陆页面
            return "/manger/manger_login.jsp";
        }
    }


    @RequestMapping("/findAllUser")
    public String FindAllUser(Model model) {

        List<User> users = mangerService.findAll();
        //将list存入request域
        model.addAttribute("users", users);
        //转发到list.jsp
        return "/manger/allUsers.jsp";
    }

    @RequestMapping("/updateUser")
    public String UpdateUser(User user, String flag, Model model, HttpServletRequest request) {

        userService.updateUser(user);

        if (flag.equals("reg_success")) {
            //用户更新
            model.addAttribute("users", user);
            //移除标志flag
            request.removeAttribute("flag");
            return "/user/userInformation.jsp";
        } else {
            //管理员更新
            //跳转到查询所有的方法
            return "/manger/findAllUser";
            //response.sendRedirect(request.getContextPath() + "/userListServlet");
        }
    }

    @RequestMapping("/addUser")
    public String AddUser(User user){
        //调用Service保存
        mangerService.AddUser(user);
        //跳转(重定向)到userListServle
        return "/manger/findAllUser";
    }

    @RequestMapping("/findUserById")
    public String FindUserById(String id, Model model,String flag){

        User user = userService.findUserById(id);

        //将user存入request
        model.addAttribute("user",user);
        //request.setAttribute("user",user);

        //将标识传递
        model.addAttribute("flag",flag);
        //request.setAttribute("flag",flag);

        //转发到update.jsp
        return "/manger/update.jsp";
        //request.getRequestDispatcher("/update.jsp").forward(request,response)
    }

    @RequestMapping("/findAllFood")
    public String FindAllFood(Model model){
        List<Food> foods = mangerService.findAllFood();
        //存入request域中
        model.addAttribute("foods",foods);
        //转发到food.jsp
        return "/manger/allFoods.jsp";
    }

    @RequestMapping("/addFood")
    public String AddFood(Food foods){
        mangerService.AddFood(foods);
        //跳转(重定向)到查询所有食物
        return "/manger/findAllFood";
    }

    @RequestMapping("/findFoodById")
    public String FindFoodById(String id, Model model){
        Food foods = mangerService.findFoodById(id);
        //将user存入request
        model.addAttribute("foods",foods);
        //转发到update.jsp
        return "/manger/updateFood.jsp";
    }

    @RequestMapping("/updateFood")
    public String UpdateFood(Food food){
        mangerService.updateFood(food);
        return "/manger/findAllFood";
    }

    @RequestMapping("/deleteFood")
    public String DeleteFood(String id){
        mangerService.deleteFood(id);
        //跳转(重定向)到checkFood
        return "/manger/findAllFood";
    }
}    

4.service层

1.service接口

public interface MangerService {
    //查询所有用户信息
    public List<User> findAll();

    //保存用户对象User
    void AddUser(User user);

    //实现管理员登陆
    public Manger manger_login(Manger manger);

    //查询菜品信息
    List<Food> findAllFood();

    //添加食品
    void AddFood(Food foods);

    Food findFoodById(String id);

    void updateFood(Food food);

    void deleteFood(String id);

}

2.service接口实现

@Service
public class MangerServiceImpl implements MangerService {

    @Autowired
    private MangerMapper mangerMapper;

    @Override
    public List<User> findAll() {
        List<User> userList = mangerMapper.findAll();
        //封装userList中的每一个user的food数据
        for (User user : userList) {
            //获得user的id
            int id = user.getId();
            //将user的id作为参数,查询对应food的集合数据
            List<Food> foods =mangerMapper.findFoodsById(id);
            user.setFoods(foods);
        }
        return userList;
    }

    @Override
    public void AddUser(User user) {
        mangerMapper.addUser(user);
    }

    @Override
    public Manger manger_login(Manger manger) {
        return mangerMapper.manger_login(manger);
    }

    @Override
    public List<Food> findAllFood() {
        return mangerMapper.findAllFood();
    }

    @Override
    public void AddFood(Food foods) {
        mangerMapper.addFood(foods);
    }

    @Override
    public Food findFoodById(String id) {
        return mangerMapper.findFoodById(Integer.parseInt(id));
    }

    @Override
    public void updateFood(Food food) {
        mangerMapper.updateFood(food);
    }

    @Override
    public void deleteFood(String id) {
        mangerMapper.deleteFoodById(Integer.parseInt(id));
    }

}

5.mapper层

public interface MangerMapper {

    //查询所有用户
    public List<User> findAll();

    //实现登录
    Manger manger_login(Manger manger);

    void addUser(User user);

    //查询所有菜品
    List<Food> findAllFood();

    void addFood(Food foods);

    Food findFoodById(int id);

    void updateFood(Food food);

    void deleteFoodById(int id);

    //查中间表
    List<Food> findFoodsById(int id);
}