SpringMVC第五次课 SSM整合

柔情只为你懂 2023-10-01 20:36 25阅读 0赞

## 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>
        
        <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>
        
        <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>
      
      <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>
      
      <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>
      
      <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/beans
            http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context.xsd
            http://www.springframework.org/schema/aop
            http://www.springframework.org/schema/aop/spring-aop-4.1.xsd">
        <context:component-scan base-package="com.aaa.service,com.aaa.dao"/>
        
        <context:property-placeholder location="classpath:db.properties"/>
        
        <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>
        
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="dataSource" ref="datasource"></property>
            
            <property name="mapperLocations" value="classpath:mapper/*.xml"></property>
            
        </bean>
        
        <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 ###

### 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 {
        
        @Autowired
        RoomService 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 {
        
        @Autowired
        RoomDao roomDao;
        @Override
        public 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%>">