杨校老师课堂基于SSM整合之用户登录案例【Eclipse - Maven版】

杨校

发布于 2019-08-01 10:40:34

5880

发布于 2019-08-01 10:40:34

文章被收录于专栏：Java技术分享圈

1. 开发环境

Eclipse：2019.06 + Jdk：8u211 + Tomcat：9.0.14 + Maven：3

2.准备工作

spring5.1.5 + mybatis3.6.4 + mybatis-spring1.3.2 + druid1.1.0 + MySQL5.1.4.6

3. 项目布局

4.编码

1. 编写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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>cn.javabs</groupId>
  <artifactId>ssm-demo</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>ssm-demo Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.javabs.cn</url>

  <!-- 为了确定每个框架的版本号 -->
  <!-- 锁定版本 -->
  <properties>
  		<spring.version>5.1.5.RELEASE</spring.version>
		<mybatis.version>3.4.6</mybatis.version>
		<mybatis-spring.version>1.3.2</mybatis-spring.version>
        <slf4j.version>1.7.25</slf4j.version>
        <log4j.version>1.2.17</log4j.version>
		<druid.version>1.1.10</druid.version> 
		<mysql.version>5.1.38</mysql.version>
  </properties>
  
  <dependencies>
    	<!-- spring -->
		<dependency>
			<groupId>org.aspectj</groupId>
			<artifactId>aspectjweaver</artifactId>
			<version>1.6.8</version>
		</dependency>

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aop</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-web</artifactId>
			<version>${spring.version}</version>
		</dependency>

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</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-tx</artifactId>
			<version>${spring.version}</version>
		</dependency>

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>${spring.version}</version>
		</dependency>

		
		<!-- mybatis start -->
		<dependency>
			 <groupId>org.mybatis</groupId>
   			<artifactId>mybatis</artifactId>
			<version>${mybatis.version}</version>
		</dependency>
		
		<!-- mybatis start -->
		<dependency>
			<groupId>org.mybatis</groupId>
		    <artifactId>mybatis-spring</artifactId>
			<version>${mybatis-spring.version}</version>
		</dependency>
		
		 <!-- log start -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>
        
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
	        <!-- log end -->
	        
	        <!--junit  start -->
       	<dependency>
	      <groupId>junit</groupId>
	      <artifactId>junit</artifactId>
	      <version>4.12</version>
	      <scope>test</scope>
	    </dependency>
	   <!-- junit end -->
	   
	    <dependency>
	    	<groupId>mysql</groupId>
	    	<artifactId>mysql-connector-java</artifactId>
	    	<version>${mysql.version}</version>
	    </dependency>
	    
	    <dependency>
		    <groupId>com.alibaba</groupId>
		    <artifactId>druid</artifactId>
		    <version>${druid.version}</version>
		</dependency>
	    
 		<dependency>
	    	<groupId>javax.servlet</groupId>
		    <artifactId>javax.servlet-api</artifactId>
		    <version>4.0.1</version>
		    <scope>provided</scope>
	    </dependency>
	    
	    <dependency>
			<groupId>jstl</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>
		
		 <dependency>
	    	<groupId>javax.servlet.jsp</groupId>
	    	<artifactId>jsp-api</artifactId>
	    	<version>2.0</version>
	    	<scope>provided</scope>
	    </dependency>
  </dependencies>
  <build>
    <finalName>ssm</finalName>
     <pluginManagement>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.0</version>
				<configuration>
					<source>1.8</source>
					<target>1.8</target>
					<encoding>UTF-8</encoding>
					<showWarnings>true</showWarnings>
				</configuration>
			</plugin>
			
			 <!-- Tomcat7 -->
	        <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
			    <artifactId>tomcat7-maven-plugin</artifactId>
			    <version>2.2</version>
                <configuration>
                    <!-- <path>/</path> -->
                    <server>tomcat7</server>
                    <port>8888</port>
                    <encoding>UTF-8</encoding>
                </configuration>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>run</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
		</plugins>
	</pluginManagement>
  </build>
</project>

2. 编写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/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
  <display-name>基于ssm的整合案例</display-name>
  
  <!-- 指定Spring配置文件 的位置 -->
  <context-param>
  	<param-name>contextConfigLocation</param-name>
  	<param-value>classpath:applicationContext.xml</param-value>
  </context-param>
  <!-- Spring 的监听器 -->
  <listener>
  	<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  
  <!-- 编码过滤器 -->
  <filter>
  	<filter-name>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>encoding</filter-name>
  	<url-pattern>*.action</url-pattern>
  </filter-mapping>
  
  <!-- 前端控制器 -->
  <servlet>
  	<servlet-name>springmvc</servlet-name>
  	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  	<init-param>
  		<param-name>contextConfigLocation</param-name>
  		<param-value>classpath:springmvc-config.xml</param-value>
  	</init-param>
  	<!-- 程序一旦启动，自动加载前端控制器 -->
  	<load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
  	<servlet-name>springmvc</servlet-name>
  	<url-pattern>*.action</url-pattern>
  </servlet-mapping>
  
  <!-- 欢迎页面 -->
  <welcome-file-list>
  	<welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  
</web-app>

3. 配置文件

1. applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd ">

	<!-- 1.读取jdbc的配置文件 -->
	<context:property-placeholder location="classpath:jdbc.properties" />
	
	<!-- 2.配置druid数据源 -->
	<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" >
		<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>
	
	<!-- 3.配置MyBatis的工厂 -->
	<bean class="org.mybatis.spring.SqlSessionFactoryBean" >
		<!-- 3.1指定mybatis-config.xml文件的位置 -->
		<property name="configLocation" value="classpath:mybatis-config.xml" />
		<!-- 3.2 注入引用的数据源 -->
		<property name="dataSource" ref="dataSource" />
	</bean>
	
	<!-- 4. 配置事务管理器 -->
	<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager" >
		<property name="dataSource" ref="dataSource" />
	</bean>
	<!-- 5. 配置事务通知 -->
	<tx:advice id="txAdvice" transaction-manager="transactionManager">
		<tx:attributes>
			<!-- 传播行为 -->
			<tx:method name="add*" propagation="REQUIRED"/>
			<tx:method name="insert*" propagation="REQUIRED"/>
			<tx:method name="create*" propagation="REQUIRED"/>
			<tx:method name="save*" propagation="REQUIRED"/>
			<tx:method name="put*" propagation="REQUIRED"/>
			<tx:method name="delete*" propagation="REQUIRED"/>
			<tx:method name="remove*" propagation="REQUIRED"/>
			<tx:method name="edit*" propagation="REQUIRED"/>
			<tx:method name="update*" propagation="REQUIRED"/>
			<tx:method name="get*" propagation="SUPPORTS" read-only="true" />
			<tx:method name="find*" propagation="SUPPORTS" read-only="true" />
			<tx:method name="select*" propagation="SUPPORTS" read-only="true" />
			<tx:method name="quert*" propagation="SUPPORTS" read-only="true" />
		</tx:attributes>
	</tx:advice>
	<!-- 6.切面 -->
	<aop:config>
		<aop:advisor advice-ref="txAdvice" pointcut="execution(* cn.javabs.ssm.service.*.*(..))"/>
	</aop:config>
	<!-- 7.接口开发，去扫描dao的配置mapper文件 -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer" >
		<property name="basePackage" value="cn.javabs.ssm.dao" />
	</bean>
	<!-- 8.配置扫描service注解 -->
	<context:component-scan base-package="cn.javabs.ssm.service"></context:component-scan>
	
</beans>

2.springmvc-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd ">


	<!-- 1.mvc扫描驱动注解 -->
	<mvc:annotation-driven />
	
	<!-- 2.配置扫描器扫描controller -->
	<context:component-scan base-package="cn.javabs.ssm.controller" />
	
	<!-- 3.配置静态资源的访问映射 -->
	<mvc:resources location="/js/" mapping="/js/**" />
	<mvc:resources location="/css/" mapping="/css/**" />
	<mvc:resources location="/img/" mapping="/img/**" />
	
	<!-- 4.配置视图处理器 -->
	<bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<!-- 前缀 -->
		<property name="prefix" value="/admin/" />
		<!-- 后缀 -->
		<property name="suffix" value=".jsp" />
	</bean>

</beans>

3.mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">

<configuration>
	<!-- 定义别名  -->
	<typeAliases>
		<package name="cn.javabs.ssm.entity"/>
	</typeAliases>
</configuration>

4.jdbc.properties

jdbc.driverClassName = com.mysql.jdbc.Driver
jdbc.url = jdbc:mysql://localhost:3306/ssm-demo
jdbc.username = root
jdbc.password = sorry

建包：

cn.javabs.ssm.entity        --- 实体包

cn.javabs.ssm.controller    --- 控制器包

cn.javabs.ssm.service       --- 业务接口包

cn.javabs.ssm.service.impl  --- 业务接口的实现类包

cn.javabs.ssm.dao           --- 持久层接口包 + Mapper文件包

User.java

package cn.javabs.ssm.entity;

public class User {

	private Integer id;
	private String username;
	private String password;

	public Integer getId() {
		return id;
	}

	public void setId(Integer 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;
	}

	@Override
	public String toString() {
		return "User [id=" + id + ", username=" + username + ", password=" + password + "]";
	}

}

2.UserDao.java

package cn.javabs.ssm.dao;

import org.apache.ibatis.annotations.Param;

import cn.javabs.ssm.entity.User;

public interface UserDao {

	User userLogin(@Param("username") String username, @Param("password") String password);

}

3.UserDao.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="cn.javabs.ssm.dao.UserDao">

	<select id="userLogin" parameterType="String"
		resultType="cn.javabs.ssm.entity.User">
		select * from users where
		username = #{username} and password = #{password}
	</select>
</mapper>

4. UserService.java

package cn.javabs.ssm.service;

import cn.javabs.ssm.entity.User;

public interface UserService {

	User login(String username, String password);

}

5. UserServiceImpl.java

package cn.javabs.ssm.service.impl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import cn.javabs.ssm.dao.UserDao;
import cn.javabs.ssm.entity.User;
import cn.javabs.ssm.service.UserService;

@Service("userService")
@Transactional
public class UserServiceImpl implements UserService {

	@Autowired
	private UserDao userDao;

	public User login(String username, String password) {
		System.out.println(username);

		User user = this.userDao.userLogin(username, password);
		System.out.println("df");
		System.out.println("ghj" + user);

		return user;
	}

}

6. UserController

package cn.javabs.ssm.controller;

import javax.servlet.http.HttpSession;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PostMapping;

import cn.javabs.ssm.entity.User;
import cn.javabs.ssm.service.UserService;

@Controller
public class UserController {

	@Autowired
	private UserService userService;

	@PostMapping("/userLogin.action")
	public String userLogin(HttpSession session, String username, String password, Model model) {
		System.out.println("password = " + password);
		User user = userService.login(username, password);
		System.out.println("user:" + user);

		if (user != null) {
			session.setAttribute("USER", user);
			return "user";
		}
		model.addAttribute("msg", "您登陆失败");
		return "message";
	}
}

7.在webapp下创建一个文件夹，命名为admin

分别创建三个网页：login.jsp message.jsp user.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"	pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<c:set value="${pageContext.request.contextPath}" var="basePath"  ></c:set>    
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录</title>
</head>
<body>
	<form action="${basePath}/userLogin.action" method="post">
		Account: <input type="text" name="username" /> <br /> 
		
		Password:<input type="text" name="password" /> <br /> 
		
				 <input type="submit"  value="登录">
	</form>
</body>
</html>

message.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>提示页面</title>
</head>
<body>
    ${msg}
</body>
</html>

user.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"  pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录成功主页</title>
</head>
<body>
	<h2>${sessionScope.USER.username}，您好。</h2>
</body>
</html>

在webapp再建一个jsp，命名为：index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录入口</title>
</head>
<body>

	<jsp:forward page="/admin/login.jsp"></jsp:forward>

</body>
</html>

右键项目，选择 Run As --- 选择 Maven Build（从上数第二个）