文章目录
- 零、本节学习目标
- 一、采用MVC架构
- 二、用户登录运行效果
- 三、基于XML配置方式整合SSM框架实现用户登录
-
- (一)创建数据库与表
-
- 1、创建数据库
- 2、创建用户表
- 3、在用户表里插入记录
- (二)创建Maven项目
- (三)项目添加相关依赖
- (四)创建日志属性文件
- (五)创建数据库属性文件
- (六)给项目添加Web功能
- (七)配置Tomcat服务器
- (八)创建用户实体类
- 更新到此
- (九)创建用户映射器接口 - UserMapper
- (十)创建用户服务类 - UserService
- (十一)创建用户控制器 - UserController
- (十二)创建用户映射器配置文件 - UserMapper.xml
- (十三)创建Spring配置文件 - spring-config.xml
- (十四)创建Spring MVC配置文件 - spring-mvc-config.xml
- (十五)编辑Web部署描述文件 - web.xml
- (十六)准备图片资源
- (十七)创建样式文件 - login.css
- (十八)创建脚本文件 - check.js
- (十九)创建页面
-
- 1、创建目录结构
- 2、创建登录页面 - login.jsp
- 3、创建网站首页 - index.jsp
- 4、创建后台管理页面 - management.jsp
- (二十)启动服务器,查看效果
- 四、课后作业
-
- 任务1、完成用户注册功能
- 任务2、实现二维码制作功能
零、本节学习目标
- 理解MVC架构
- 掌握基于配置文件方式整合SSM框架
- 利用SSM框架实现用户登录功能
一、采用MVC架构
- M(Model):模型层
- V(View):视图层
- C(Controller):控制层
- MVC开始是存在于桌面程序中的,M是指业务模型,V是指用户界面,C则是控制器,使用MVC的目的是将M和V的实现代码分离,从而使同一个程序可以使用不同的表现形式。比如一批统计数据可以分别用柱状图、饼图来表示。C存在的目的则是确保M和V的同步,一旦M改变,V应该同步更新。
- 模型-视图-控制器(MVC)是Xerox PARC在二十世纪八十年代为编程语言Smalltalk-80发明的一种软件设计模式,已被广泛使用。后来被推荐为Oracle旗下Sun公司Java EE平台的设计模式,并且受到越来越多的使用ColdFusion和PHP的开发者的欢迎。模型-视图-控制器模式是一个有用的工具箱,它有很多好处,但也有一些缺点。
- 展现层⟹\\Longrightarrow⟹控制层⟹\\Longrightarrow⟹业务层⟹\\Longrightarrow⟹映射层⟹\\Longrightarrow⟹数据库
二、用户登录运行效果
- 从首页跳转到登录页面
三、基于XML配置方式整合SSM框架实现用户登录
(一)创建数据库与表
1、创建数据库
- 数据库
simonshop
,采用utf8mb4
编码
- 单击【确定】按钮
2、创建用户表
- 创建用户表
t_user
3、在用户表里插入记录
- 插入4条记录
INSERT INTO `t_user` VALUES ('1', 'admin', '12345', '15734345678', '2021-12-02 08:40:35', '0');
INSERT INTO `t_user` VALUES ('2', '郑晓红', '11111', '13956567889', '2022-12-20 09:51:43', '1');
INSERT INTO `t_user` VALUES ('3', '温志军', '22222', '13956678907', '2022-12-20 09:52:36', '1');
INSERT INTO `t_user` VALUES ('4', '涂文艳', '33333', '15890905678', '2022-12-05 09:52:56', '1');
(二)创建Maven项目
- 创建Maven项目 -
SSMLogin
- 单击【Finish】按钮
(三)项目添加相关依赖
- 在
pom.xml
文件里添加相关依赖
<?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/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>net.huawei.ssm</groupId><artifactId>SSMLogin</artifactId><version>1.0-SNAPSHOT</version><properties><spring.version>5.3.25</spring.version></properties><dependencies><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>${spring.version}</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.49</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.1.24</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.5.5</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>2.0.5</version></dependency><dependency><groupId>log4j</groupId><artifactId>log4j</artifactId><version>1.2.17</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.13</version><scope>test</scope></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>${spring.version}</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.1.0</version><scope>provided</scope></dependency></dependencies>
</project>
- 刷新项目Maven依赖
(四)创建日志属性文件
- 日志属性文件 -
log4j.properties
log4j.rootLogger=WARN, stdout, logfile
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - %m%n
log4j.appender.logfile=org.apache.log4j.FileAppender
log4j.appender.logfile.File=target/ssm.log
log4j.appender.logfile.layout=org.apache.log4j.PatternLayout
log4j.appender.logfile.layout.ConversionPattern=%d %p [%c] - %m%n
(五)创建数据库属性文件
- 数据库属性文件 -
jdbc.properties
jdbc.driverClassName = com.mysql.jdbc.Driver
jdbc.url = jdbc:mysql://localhost:3306/simonshop?useSSL=false&useUnicode=true&characterEncoding=utf8
jdbc.username = root
jdbc.password = 903213
(六)给项目添加Web功能
- 打开项目结构窗口,切换到
Modules
- 添加Web功能
- 单击【Create Artifact】按钮
- 修改Artifact名称 -
SSMLogin
- 将项目依赖添加到输出目录
- 单击【Put into /WEB-INF/lib】命令
- 单击【OK】按钮
(七)配置Tomcat服务器
- 单击工具栏上的【Add Configuration…】,打开【运行/调试配置】窗口
- 添加本地的Tomcat服务器
- 选择
Local
- 单击【Configure…】按钮
- 单击【OK】按钮
- 修改名称,启动的浏览器
- 单击【Fix】按钮
- 切换到【Server】选项卡
- 单击【OK】按钮
(八)创建用户实体类
- 创建
net.huawei.ssm.bean
包,在包里创建User
类
package net.huawei.ssm.bean;import java.util.Date;
public class User {private int id;private String username;private String password;private String telephone;private Date registerTime;private int popedom;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public String getTelephone() {return telephone;}public void setTelephone(String telephone) {this.telephone = telephone;}public Date getRegisterTime() {return registerTime;}public void setRegisterTime(Date registerTime) {this.registerTime = registerTime;}public int getPopedom() {return popedom;}public void setPopedom(int popedom) {this.popedom = popedom;}@Overridepublic String toString() {return "User{" +"id=" + id +", username='" + username + '\\'' +", password='" + password + '\\'' +", telephone='" + telephone + '\\'' +", registerTime=" + registerTime +", popedom=" + popedom +'}';}
}
更新到此
(九)创建用户映射器接口 - UserMapper
- 创建net.hw.shop.mapper包,在包里创建UserMapper接口
package net.hw.shop.mapper;import net.hw.shop.bean.User;
import org.apache.ibatis.annotations.Param;
import org.springframework.stereotype.Repository;
@Mapper
public interface UserMapper {User login(@Param("username") String username, @Param("password") String password);
}
(十)创建用户服务类 - UserService
- 在net.hw.shop包里创建service子包,然后在子包里创建UserService类
package net.hw.shop.service;import net.hw.shop.bean.User;
import net.hw.shop.mapper.UserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class UserService {@Autowiredprivate UserMapper userMapper;public User login(String username, String password) {return userMapper.login(username, password);}
}
(十一)创建用户控制器 - UserController
- 在net.hw.shop包里创建controller子包,然后在子包里创建UserController类
package net.hw.shop.controller;import net.hw.service.UserService;
import net.hw.shop.bean.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;import javax.servlet.http.HttpSession;@Controller
@RequestMapping("/user")
public class UserController {@Autowiredprivate UserService userService;@RequestMapping("/login")public String login(@RequestParam("username") String username,@RequestParam("password") String password,HttpSession session) {User user = userService.login(username, password);if (user != null) {session.setAttribute("username", username);if (session.getAttribute("loginMsg") != null) {session.removeAttribute("loginMsg");}if (user.getPopedom() == 0) {return "backend/management"; } else {return "frontend/index"; }} else {session.setAttribute("loginMsg", "用户名或密码错误!");return "frontend/login"; }}@RequestMapping("/logout")public String logout(HttpSession session) {session.removeAttribute("username");session.invalidate(); return "frontend/login"; }
}
(十二)创建用户映射器配置文件 - UserMapper.xml
- 在resources里创建mapper子目录,然后在子目录里创建UserMapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="net.hw.shop.mapper.UserMapper"><resultMap id="userMap" type="net.hw.shop.bean.User"><result property="id" column="id"/><result property="username" column="username"/><result property="password" column="password"/><result property="telephone" column="telephone"/><result property="registerTime" javaType="java.util.Date" column="register_time" jdbcType="TIMESTAMP"/><result property="popedom" column="popedom"/></resultMap><select id="login" resultMap="userMap">SELECT * FROM t_user WHERE username = #{username} AND password = #{password};</select>
</mapper>
(十三)创建Spring配置文件 - spring-config.xml
- 在resources里创建config子目录,然后在子目录里创建spring-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<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"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"><context:component-scan base-package="net.hw.shop"/><context:property-placeholder location="classpath:jdbc.properties"/><bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"><property name="driverClassName" value="${jdbc.driverClassName}"/><property name="url" value="${jdbc.url}"/><property name="username" value="${jdbc.username}"/><property name="password" value="${jdbc.password}"/></bean><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource"/><property name="mapperLocations" value="classpath:mapper/UserMapper.xml"/></bean><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/><property name="basePackage" value="net.hw.shop.mapper"/></bean>
</beans>
- 说明:本案例没有对数据库进行更新操作,因此没有引入事务管理
- 如果项目里对数据库有更新操作,那么UserService应该添加@Transactional注解,而且Spring配置文件里还要添加事务管理
<tx:annotation-driven transaction-manager="txManager" />
<tx:advice id="txAdvice" transaction-manager="txManager"> <tx:attributes> <tx:method name="find*" read-only="true"/> <tx:method name="add*" propagation="REQUIRED"/> <tx:method name="delete*" propagation="REQUIRED"/> <tx:method name="update*" propagation="REQUIRED"/> </tx:attributes>
</tx:advice>
<aop:config> <aop:pointcut id="mypt" expression="execution(public * net.hw.shop.service..*.*(..))"/> <aop:advisor advice-ref="txAdvice" pointcut-ref="mypt"/>
</aop:config>
(十四)创建Spring MVC配置文件 - spring-mvc-config.xml
- 在resources/config目录里创建spring-mvc-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<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" xmlns:p="http://www.springframework.org/schema/p"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttps://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/mvchttps://www.springframework.org/schema/mvc/spring-mvc.xsd"><mvc:resources mapping="/css/**" location="/WEB-INF/css/"/><mvc:resources mapping="/js/**" location="/WEB-INF/js/"/><mvc:resources mapping="/images/**" location="/WEB-INF/images/"/><mvc:annotation-driven/><mvc:view-controller path="user/login" view-name="frontend/login" /><context:component-scan base-package="net.hw.shop.controller"/><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"p:viewClass="org.springframework.web.servlet.view.JstlView"p:prefix="/WEB-INF/views/"p:suffix=".jsp"/><context:component-scan base-package="net.hw.shop"><context:exclude-filter type="annotation" expression="org.springframework.stereotype.Service"/></context:component-scan>
</beans>
(十五)编辑Web部署描述文件 - web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaeehttp://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"version="4.0"><display-name>simonshop</display-name><welcome-file-list><welcome-file>/WEB-INF/views/frontend/login.jsp</welcome-file></welcome-file-list><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:config/spring-config.xml</param-value></context-param><servlet><servlet-name>DispatcherServlet</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:config/spring-mvc-config.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>DispatcherServlet</servlet-name><url-pattern>/</url-pattern></servlet-mapping><filter><filter-name>Character Encoding</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><param-name>encoding</param-name><param-value>UTF-8</param-value></init-param></filter><filter-mapping><filter-name>Character Encoding</filter-name><url-pattern>/*</url-pattern></filter-mapping>
</web-app>
(十六)准备图片资源
- 在WEB-INF里创建images目录,用来存放图片资源
(十七)创建样式文件 - login.css
- 在WEB-INF里创建css子目录,然后在子目录里创建login.css
body {margin: 0px;text-align: center;background: #cccccc;
}
(十八)创建脚本文件 - check.js
- 在WEB-INF里创建js子目录,然后在子目录里创建check.js
function checkLoginForm() { var username = document.getElementById("username");var password = document.getElementById("password");if (username.value == "") {alert("用户名不能为空!");username.focus();return false;}if (password.value == "") {alert("密码不能为空!");password.focus();return false;} return true;
}
(十九)创建页面
1、创建目录结构
2、创建登录页面 - login.jsp
- 在views/frontend里创建login.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><c:set var="path" value="${pageContext.request.contextPath}"/>
<c:set var="basePath"value="${pageContext.request.scheme}://${pageContext.request.serverName}:${pageContext.request.serverPort}${path}/"/>
<html>
<head><title>用户登录</title><meta http-equiv="Content-Type" content="text/html; charset=utf-8" ><base href="${basePath}"><script src="js/check.js"></script><link href="css/login.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<h3 style="text-align: center">用户登录</h3>
<form id="frmLogin" action="user/login" method="post"><table class="tb" border="1" cellpadding="10" style="margin: 0px auto"><tr><td align="center">账号</td><td><input id="username" type="text" name="username"/></td></tr><tr><td align="center">密码</td><td><input id="password" type="password" name="password"/></td></tr><tr align="center"><td colspan="2"><input type="submit" value="登录" onclick="return checkLoginForm()"/><input type="reset" value="重置"/></td></tr></table>
</form>
<c:if test="${loginMsg!=null}"><script type="text/javascript">alert("${loginMsg}")</script><c:remove var="loginMsg"/>
</c:if>
</body>
</html>
3、创建网站首页 - index.jsp
- 在views/frontend里创建index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><c:set var="path" value="${pageContext.request.contextPath}"/>
<c:set var="basePath"value="${pageContext.request.scheme}://${pageContext.request.serverName}:${pageContext.request.serverPort}${path}/"/>
<html>
<head><title>首页</title><base href="${basePath}">
</head>
<body>
<h3>欢迎访问西蒙购物网</h3>
登录用户:${username} —— <a href="user/logout">注销</a><br/>
<img src="images/bear.jpg" width="300" height="250">
</body>
</html>
4、创建后台管理页面 - management.jsp
- 在views/backend里创建management.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><c:set var="path" value="${pageContext.request.contextPath}"/>
<c:set var="basePath"value="${pageContext.request.scheme}://${pageContext.request.serverName}:${pageContext.request.serverPort}${path}/"/>
<html>
<head><title>后台管理</title><base href="${basePath}">
</head>
<body>
<h3>西蒙购物网后台管理</h3>
管理员:${username} —— <a href="user/logout">注销</a><br/>
<img src="images/bear.jpg" width="300" height="250">
</body>
</html>
(二十)启动服务器,查看效果
四、课后作业
任务1、完成用户注册功能
- 在用户登录页面添加跳转到用户注册页面的超链接
- 用户注册要进行用户名和密码的非空校验
- 用户注册失败,弹出警告框提示用户
- 用户注册成功,就跳转到用户登录页面
- 用新注册的用户进行登录测试
任务2、实现二维码制作功能
- 二维码制作页面:文本框输入字符串,还有提交按钮
- 单击提交按钮,跳转到目标页面,显示生成的二维码
- 参考案例