SSM框架整合之第五次课

复习：

spring 业务层

springmvc 表现层

mybatis 持久层

1.整合目标

Spring框架，来整合其他框架，想到Spring第一次课，兼容性比较好。还可以整合其他xxx框架。

Spring框架整合其他两个框架

2.项目搭建

自己搭建，比较简单的maven web项目.

3.依赖创建

pom.xml的jar

<?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>com.aaa</groupId><artifactId>ssm01</artifactId><version>1.0-SNAPSHOT</version><packaging>war</packaging><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><maven.compiler.source>1.8</maven.compiler.source><maven.compiler.target>1.8</maven.compiler.target><!--版本号    --><spring.version>5.3.8</spring.version><mybatis.version>3.5.7</mybatis.version><mysql.version>8.0.25</mysql.version></properties><dependencies><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</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>${spring.version}</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>${mybatis.version}</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>2.0.6</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>${mysql.version}</version></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.20</version></dependency><!--  其他jar依赖，需要的时候，再加  --><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.2.4</version></dependency></dependencies></project>

4.web.xml文件

这个文件，在tomcat,只要tomcat启动，就加载这个文件.

<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_3_1.xsd"  version="3.1"><display-name>Archetype Created Web Application</display-name><!--  启动spring监听器,加载spring核心配置文件 --><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring.xml</param-value></context-param><!--配置前端核心控制器DispatcherServlet，加载springmvc的核心配置文件--><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:spring_mvc.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><!-- utf-8解决中文乱码 --><filter><filter-name>CharacterEncodingFilter</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>CharacterEncodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping>
</web-app>

5.db.properties配置

jdbc.driverClassName=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmdb?useTimezone=true&useUnicode=true&characterEncoding=utf8&useSSL=false
jdbc.username=root
jdbc.password=root

6.spring.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"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-4.0.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-4.1.xsd"><context:component-scan base-package="com.aaa.service,com.aaa.dao"/><!-- spring加载数据库配置文件 --><context:property-placeholder location="classpath:db.properties"/><!-- dataSource --><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><!-- 配置sqlsessionfactory --><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="datasource"></property><!-- 扫描所有的mapper xml --><property name="mapperLocations" value="classpath:mapper/*.xml"></property><!-- <property name="configLocation" value="classpath:mybatisConfig.xml"></property> --></bean><!-- 把所有mapper接口生成代理类，注入到Spring容器中 --><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><property name="basePackage" value="com.aaa.dao"></property><property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property></bean>
</beans>

7.spring_mvc.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"xsi:schemaLocation="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"><!--扫描控制器包--><context:component-scan base-package="com.aaa.controller"></context:component-scan><mvc:default-servlet-handler/><mvc:annotation-driven></mvc:annotation-driven><!--配置spring mvc默认的jsp视图解析器--><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><!--配置返回视图的前缀--><property name="prefix" value="/WEB-INF/views/"></property><!--配置返回视图的后缀--><property name="suffix" value=".jsp"></property></bean>
</beans>

8.java层实现

控制器代码：

package com.aaa.controller;import com.aaa.entity.Room;
import com.aaa.service.RoomService;
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.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.ModelAndView;@Controller
@RequestMapping("room")
public class RoomController {@AutowiredRoomService roomService;@RequestMapping("/saveRoom")public String saveRoom(Room room){int result=roomService.saveRoom(room);System.out.println(room);System.out.println(result);return "room/roomlist";}@RequestMapping("/toaddRoom")public String toAddRoom(){return "room/addRoom";}
}

dao层接口实现

package com.aaa.dao;import com.aaa.entity.Room;public interface RoomDao {public int saveRoom(Room room);
}

实体类代码实现

package com.aaa.entity;import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;@Data
@NoArgsConstructor
@AllArgsConstructor
public class Room {private Integer id;private String roomcode;private Integer status;
}

业务层代码实现

package com.aaa.service;import com.aaa.entity.Room;public interface RoomService {public int saveRoom(Room room);
}

业务层实现类代码：

package com.aaa.service.impl;import com.aaa.dao.RoomDao;
import com.aaa.entity.Room;
import com.aaa.service.RoomService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;@Service("roomService")
public class RoomServiceImpl implements RoomService {@AutowiredRoomDao roomDao;@Overridepublic int saveRoom(Room room) {return roomDao.saveRoom(room);}
}

dao层实现类，在resources下新建mapper目录，创建RoomDaoMapper.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="com.aaa.dao.RoomDao"><insert id="saveRoom" parameterType="com.aaa.entity.Room">insert into room values(#{id},#{roomcode},#{status})</insert>
</mapper>

9.测试页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%>
<html>
<head><title>增加自习室</title><base href="<%=basePath%>">
</head>
<body>
<%--    <form action="saveRoom" method="post">--%><form action="room/saveRoom" method="post"><label for="rid">编号</label><input type="text" name="id" id="rid"><br><label for="roomcode">名称</label><input type="text" name="roomcode" id="roomcode"><br><label for="rstatus">状态</label>空闲<input type="radio" name="status"  id="rstatus" value="0"/>借用<input type="radio" name="status" checked="checked" value="1"/><input type="submit" value="提交"></form>
</body>
</html>

7.1 测试整合之后的helloworld,就是index.jsp页面是否正常运行;

7.2 可以自己动手写代码，把各层类、接口填充完毕；或自动生成；测试Controller的跳转;

两个路径问题：

7.3 4等来回测试页面action跳转问题.

<%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><base href="<%=basePath%>">

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