16. SSM 搭建

SSM：Spring、SpringMVC、Mybatis

项目完成图：

1、搭建 SpringMVC

1.1 导入spring和springMVC包

• spring-webmvc
• servlet-api
• 异步请求jacksonjar
• jstl
• 文件上传下载commons-fileupload
• spring-context
• 阿里数据源

  <dependencies><!-- spring-webmvc --><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>5.2.2.RELEASE</version></dependency><!-- servlet-api --><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>4.0.1</version><scope>provided</scope></dependency><!--添加jacksonjar包,spring异步请求时转换json对象需要的包--><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>2.9.1</version></dependency><!-- jstl --><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><!-- 文件上传下载 --><dependency><groupId>commons-fileupload</groupId><artifactId>commons-fileupload</artifactId><version>1.3.3</version></dependency><!-- spring-context --><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>5.2.2.RELEASE</version></dependency><!-- 阿里数据源 --><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.1.10</version></dependency></dependencies>

1.2 创建spring配置文件

创建application.xml 和 springmvc.xml文件

application.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.xsdhttp://www.springframework.org/schema/contexthttps://www.springframework.org/schema/context/spring-context.xsd"><!-- 开启spring的注解扫描功能 --><context:component-scan base-package="com.company.ssm"></context:component-scan><!--导入springMVC配置 --><import resource="springmvc.xml"/><!-- 导入数据库连接配置 --><import resource="db.xml"/>
</beans>

springmvc.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:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc.xsd"><!-- 开启springmvc注解 --><mvc:annotation-driven></mvc:annotation-driven><!-- 视图解析器 --><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property><property name="prefix" value="/WEB-INF/jsp/"></property><property name="suffix" value=".jsp"></property></bean><!-- 过滤静态资源文件  --><mvc:default-servlet-handler/><!-- 文件解析器 --><bean id="multipartResolver"  class="org.springframework.web.multipart.commons.CommonsMultipartResolver"><property name="defaultEncoding" value="utf-8"></property><property name="maxUploadSize" value="10485760"></property></bean><!-- 拦截器 --><mvc:interceptors><mvc:interceptor><mvc:mapping path="/**"/><!-- 配置哪些请求被拦截  拦截器不会拦截jsp页面请求--><mvc:exclude-mapping path="/statics/**"/><!-- 哪些请求不被拦截 --><mvc:exclude-mapping path="/loginCtl/toLogin"/><!-- 哪些请求不被拦截 --><bean id="demo" class="com.company.ssm.interceptor.LoginInterceptor"></bean></mvc:interceptor></mvc:interceptors></beans>

1.3 在web.xml中配置 spring 请求分发 servlet

web.xml

<!DOCTYPE web-app PUBLIC"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN""http://java.sun.com/dtd/web-app_2_3.dtd" ><web-app  version="2.5"xmlns="http://java.sun.com/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/javaeehttp://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"><display-name>Archetype Created Web Application</display-name><!--  配置spring 核心请求分发器--><servlet><servlet-name>springMVC</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><!-- 配置初始化参数,加载spring配置文件 --><init-param><param-name>contextConfigLocation</param-name><!-- <param-value>/WEB-INF/classes/application.xml</param-value> --><param-value>classpath:application.xml</param-value></init-param><!-- 启动时就创建 DispatcherServlet对象,并加载spring框架--><load-on-startup>0</load-on-startup></servlet><!-- 配置请求映射地址 --><servlet-mapping><servlet-name>springMVC</servlet-name><url-pattern>/</url-pattern></servlet-mapping></web-app>

1.4 创建jsp页面

login.jsp

<%--Created by IntelliJ IDEA.User: God_86Date: 2020/6/30Time: 14:45To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>登录</title>
</head>
<body>
<h1>登录页面</h1>
<form action="${path}/loginCtl/login" method="post">用户名：<input type="text" name="userName"> <br>密码：<input type="password" name="password"> <br><input type="submit" value="登录">
</form>
</body>
</html>

loginSuccess.jsp

<%--Created by IntelliJ IDEA.User: God_86Date: 2020/6/30Time: 16:06To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>登录成功</title>
</head>
<body>
登录成功
</body>
</html>

1.5 创建控制器类

SpringMVC搭建成功！！！

2、集成MyBatis

2.1 导包

• Springjdbc 模块
• Mybatis
• Mysql驱动
• Log4j
• Spring 整合 mybatis 的插件包
• Spring 切面实现AOP

  <!-- spring-context --><!-- spring-jdbc --><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>5.2.2.RELEASE</version></dependency><!-- mysql --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.20</version></dependency><!-- Spring 切面实现AOP --><dependency><groupId>org.springframework</groupId><artifactId>spring-aspects</artifactId><version>5.2.2.RELEASE</version></dependency><!-- spring整合mybatis的插件包 --><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>1.3.1</version></dependency><!-- mybatis --><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.4.2</version></dependency><!-- log4j --><dependency><groupId>log4j</groupId><artifactId>log4j</artifactId><version>1.2.17</version></dependency>  

2.2 创建包结构

2.3 创建Spring,mybatis 配置文件

jdbc.properties

url=jdbc:mysql://127.0.0.1:3306/shop?characterEncoding=utf-8&serverTimezone=GMT
driver=com.mysql.cj.jdbc.Driver
jdbc_username=root
jdbc_password=123456
initialSize=10
minIdle=5
maxActive=20

log4j.properties

log4j.rootLogger = debug,stdout,D
#System out Console
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = [%p] %d{yyyy-MM-dd HH:mm:ss,SSS} %m%n#System out File
log4j.appender.D = org.apache.log4j.FileAppender
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = F://eclipse-workspace/log.log
log4j.appender.D.Append = true
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = %d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ] -[%l] %m%n

db.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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx.xsd"><!-- 加载属性文件 --><context:property-placeholder location="classpath:jdbc.properties"/><!-- spring管理阿里数据源对象的创建,由此数据源对象管理创建数据库连接对象(Connection) --><bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"><property name="driverClassName" value="${driver}"></property><property name="url" value="${url}"></property><property name="username" value="${jdbc_username}"></property><property name="password" value="${jdbc_password}"></property><property name="initialSize" value="${initialSize}"></property><property name="minIdle" value="${minIdle}"></property><property name="maxActive" value="${maxActive}"></property></bean><!-- 配置事务管理器类 --><bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource"></property></bean><!-- 开启事务注解功能 --><tx:annotation-driven transaction-manager="transactionManager" /><!-- 配置sqlSessionFactory spring管理生成SqlSessionFactory对象--><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><!--注入数据库连接管理对象 --><property name="dataSource" ref="dataSource"></property><!-- 加载mybatis全局配置文件 --><property name="configLocation" value="classpath:mybatis-config.xml"></property><!-- 加载sql映射文件 -->
<!--             <property name="mapperLocations" value="classpath:com/company/ssm/mapper/*Mapper.xml"></property>--><property name="mapperLocations" value="classpath:mybatis/mapper/*Mapper.xml"></property><!-- java bean注册别名 -->
<!--           <property name="typeAliasesPackage" value="com.company.ssm.bean"></property>--></bean><!-- 指定生成接口代理 --><bean id="mapperFactory" class="org.mybatis.spring.mapper.MapperScannerConfigurer"><property name="basePackage" value="com.company.ssm.dao"></property><property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property></bean>
</beans>

mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configurationPUBLIC "-//mybatis.org//DTD Config 3.0//EN""http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration><typeAliases><package name="com.company.ssm.bean"/></typeAliases>
</configuration>

3、监听器

设置全局默认地址的监听器类

ObjectListener.java

package com.company.ssm.util;import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;/*** 监听器类* 设置全局默认地址*/
public class ObjectListener implements ServletContextListener {@Overridepublic void contextInitialized(ServletContextEvent sce) {System.out.println("ServletContext对象创建");//监听ServletContext 对象的创建ServletContext context = sce.getServletContext();context.setAttribute("path", context.getContextPath());}@Overridepublic void contextDestroyed(ServletContextEvent sce) {}
}

配置监听器：

web.xml

  <!-- 配置监听器,设置上下文路径 --><listener><listener-class>com.company.ssm.util.ObjectListener</listener-class></listener>

4、拦截器

登录拦截器

LoginInterceptor.java

package com.company.ssm.interceptor;import com.company.ssm.bean.User;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;public class LoginInterceptor implements HandlerInterceptor {/*方法：检测用户是否登录，若没有登录则跳转登录页当请求到达控制器之前被执行true--继续向下执行,到达下一个拦截器,或控制器false--不会继续向下执行*/@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {HttpSession session = request.getSession();User user = (User) session.getAttribute("user");if(user != null){response.sendRedirect(request.getContextPath()+"/loginCtl/toLogin");return false;}else{return true;}}/*控制器方法执行之后执行*/@Overridepublic void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {}/*整个请求结束后执行*/@Overridepublic void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {}
}

配置拦截器：

springmvc.xml

    <!-- 拦截器 --><mvc:interceptors><mvc:interceptor><mvc:mapping path="/**"/><!-- 配置哪些请求被拦截  拦截器不会拦截jsp页面请求--><mvc:exclude-mapping path="/statics/**"/><!-- 哪些请求不被拦截 --><mvc:exclude-mapping path="/loginCtl/toLogin"/><!-- 哪些请求不被拦截 --><bean id="demo" class="com.company.ssm.interceptor.LoginInterceptor"></bean></mvc:interceptor></mvc:interceptors>