2021-05-03 10:14  阅读(135)
文章分类:Spring MVC 教程 文章标签:SpringSpring MVC
©  原文作者:一点教程 原文地址:http://www.yiidian.com/springmvc/

在上文中,我们演示了Spring MVC Maven单模块SSM整合,一些中大型项目,我希望采用Maven多模块构建方式来搭建SSM整合项目。下面在IDEA中演示如何使用Maven的多模块方式构建SSM项目。

Maven多模块构建SSH项目架构图:

202105031014451631.png

1 建立parent工程

1.1 建立父工程模块

202105031014453922.png

1.2 配置父工程的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>com.yiidian</groupId>
        <artifactId>yiidian-parent</artifactId>
        <version>1.0-SNAPSHOT</version>
    
        <!--
         SSM整合的基础依赖
       -->
        <!-- 1.spring相关的依赖 -->
        <dependencies>
            <!-- 1.1 ioc -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>5.0.2.RELEASE</version>
            </dependency>
            <!--1.2 aop -->
            <dependency>
                <groupId>org.aspectj</groupId>
                <artifactId>aspectjweaver</artifactId>
                <version>1.8.7</version>
            </dependency>
            <!-- 1.3 声明式事务-->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-tx</artifactId>
                <version>5.0.2.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
                <version>5.0.2.RELEASE</version>
            </dependency>
            <!-- 1.4 test -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-test</artifactId>
                <version>5.0.2.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.12</version>
            </dependency>
    
    
            <!-- 2. mybatis相关依赖 -->
            <!-- 2.1 mysql驱动-->
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.46</version>
            </dependency>
            <!-- 2.2 数据源 -->
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>1.1.6</version>
            </dependency>
            <!-- 2.3 mybatis核心包 -->
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis</artifactId>
                <version>3.4.5</version>
            </dependency>
    
            <!-- 3. springmvc相关依赖-->
            <!-- 3.1 springmvc核心包 -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>5.0.2.RELEASE</version>
            </dependency>
            <!--3.2 servlet依赖 -->
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>servlet-api</artifactId>
                <version>2.5</version>
            </dependency>
            <!--3.3 jstl标签库-->
            <dependency>
                <groupId>jstl</groupId>
                <artifactId>jstl</artifactId>
                <version>1.2</version>
            </dependency>
    
            <!-- 4. log4j日志 -->
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>1.2.17</version>
            </dependency>
    
            <!-- 5. spring与mybatis整合包 *** -->
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis-spring</artifactId>
                <version>1.3.1</version>
            </dependency>
        </dependencies>
    </project>

2 建立Domain工程

2.1 建立子模块

点击父工程右键->Module

202105031014458153.png

2.2 编写Pojo类

    
    package com.yiidian.domain;
    
    import java.util.Date;
    
    /**
     * 实体类
     * 一点教程网 - www.yiidian.com
     */
    public class User {
        private Integer id;
        private String username;
        private Date birthday;
        private String sex;
        private String address;
    
        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 Date getBirthday() {
            return birthday;
        }
    
        public void setBirthday(Date birthday) {
            this.birthday = birthday;
        }
    
        public String getSex() {
            return sex;
        }
    
        public void setSex(String sex) {
            this.sex = sex;
        }
    
        public String getAddress() {
            return address;
        }
    
        public void setAddress(String address) {
            this.address = address;
        }
    
        @Override
        public String toString() {
            return "User{" +
                    "id=" + id +
                    ", username='" + username + '\'' +
                    ", birthday=" + birthday +
                    ", sex='" + sex + '\'' +
                    ", address='" + address + '\'' +
                    '}';
        }
    }
    

2.3 项目结构

202105031014459594.png

3 建立Dao工程

3.1 建立子模块

202105031014461425.png

3.2 依赖domain工程

    
    <dependencies>
        <dependency>
             <groupId>com.yiidian</groupId>
             <artifactId>yiidian-domain</artifactId>
             <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>

3.3 编写Dao接口

    
    package com.yiidian.dao;
    import com.yiidian.domain.User;
    import org.apache.ibatis.annotations.Select;
    
    import java.util.List;
    
    /**
     * Dao接口
     */
    public interface UserDao {
        /**
         * 查询所有账户
         */
        @Select("select * from user")
        public List<User> findAll();
    }
    

3.4 编写Spring的Dao配置

202105031014462996.png

内容如下:

    
    <?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/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">
        
        <!-- 1. 创建数据源 -->
        <context:property-placeholder location="classpath:jdbc.properties"/>
    
        <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
            <property name="url" value="${jdbc.url}"/>
            <property name="driverClassName" value="${jdbc.driver}"/>
            <property name="username" value="${jdbc.username}"/>
            <property name="password" value="${jdbc.password}"/>
        </bean>
    
        <!-- 2. 为了创建Dao代理对象,先创建SqlSessionFactory对象 -->
        <!--  SqlSessionFactoryBean: 创建SqlSessionFactory对象的工具 -->
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <!-- 注入数据源 -->
            <property name="dataSource" ref="dataSource"/>
        </bean>
    
        <!-- 3. 扫描Dao接口所在包,扫描后用于创建Dao代理对象,把代理对象放入IOC容器 -->
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            <!-- Dao扫描目录 -->
            <property name="basePackage" value="com.yiidian.dao"/>
        </bean>
    </beans>

applicationContext-dao.xml文件只存放与Dao有关的配置

3.5 准备jdbc.properties文件

    
    jdbc.driver=com.mysql.jdbc.Driver
    jdbc.url=jdbc:mysql://localhost:3306/ssm?characterEncoding=utf8
    jdbc.username=root
    jdbc.password=root
    jdbc.initialSize=3
    jdbc.maxActive=10

4 建立Service工程

4.1 建立子模块

202105031014464647.png

4.2 依赖Dao工程

    
    <dependencies>
         <dependency>
             <groupId>com.yiidian</groupId>
             <artifactId>yiidian-dao</artifactId>
             <version>1.0-SNAPSHOT</version>
         </dependency>
    </dependencies>

4.3 编写Service接口和实现

Service接口

    
    package com.yiidian.service;
    
    import com.yiidian.domain.User;
    
    import java.util.List;
    
    /**
     * 业务层接口
     * 一点教程网 - www.yiidian.com
     */
    public interface UserService {
        /**
         * 查询所有用户
         */
        public List<User> findAll();
    }
    

Service实现类

    
    package com.yiidian.service.impl;
    
    import com.yiidian.dao.UserDao;
    import com.yiidian.domain.User;
    import com.yiidian.service.UserService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    
    import java.util.List;
    
    /**
     *业务层实现类
     * 一点教程网 - www.yiidian.com
     */
    @Service
    public class UserServiceImpl implements UserService{
        //注入Dao对象
        @Autowired
        private UserDao userDao;
        @Override
        public List<User> findAll() {
            return userDao.findAll();
        }
    }
    

4.4 编写Spring的Service配置

202105031014466318.png

内容如下:

    
    <?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:tx="http://www.springframework.org/schema/tx"
           xmlns:aop="http://www.springframework.org/schema/aop"
           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/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
    
        <!--扫描Service接口-->
        <context:component-scan base-package="com.yiidian.service"/>
    
        <!--Spring声明式事务-->
        <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="dataSource"/>
        </bean>
    
        <!--事务通知-->
        <tx:advice id="txAdvice" transaction-manager="transactionManager">
            <tx:attributes>
                <tx:method name="get*" isolation="DEFAULT" propagation="SUPPORTS" read-only="true"/>
                <tx:method name="load*" isolation="DEFAULT" propagation="SUPPORTS" read-only="true"/>
                <tx:method name="select*" isolation="DEFAULT" propagation="SUPPORTS" read-only="true"/>
                <tx:method name="find*" isolation="DEFAULT" propagation="SUPPORTS" read-only="true"/>
                <tx:method name="*" isolation="DEFAULT" propagation="REQUIRED"/>
            </tx:attributes>
        </tx:advice>
    
        <!--事务切面-->
        <aop:config>
            <!--切入点-->
            <aop:pointcut id="pt" expression="execution(* com.yiidian.service.impl.*ServiceImpl.*(..))"/>
            <!--切面-->
            <aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/>
        </aop:config>
    </beans>

该配置主要需要扫描Service实现类和配置Spring声明式事务。

5 建立Web工程

5.1 建立子模块

202105031014468129.png

5.2 依赖Service工程

    
    <dependencies>
         <dependency>
            <groupId>com.yiidian</groupId>
            <artifactId>yiidian-service</artifactId>
            <version>1.0-SNAPSHOT</version>
         </dependency>
    </dependencies>

该项目为Web项目

2021050310144708210.png

5.3 配置监听器和核心控制器

    
    <?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    		 xmlns="http://java.sun.com/xml/ns/javaee"
    		 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    		 version="2.5">
    	
    	<context-param>
    		<param-name>contextConfigLocation</param-name>
    		<param-value>classpath*:applicationContext-*.xml</param-value>
    	</context-param>
    
    	<listener>
    		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    	</listener>
    
    	<!-- 配置核心控制器 -->
    	<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:springmvc.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>
    </web-app>

这里注意Spring监听器读取的路径为classpath*:,这个语法指加载当前项目及依赖工程的所有符合条件的文件。因为applicationContext.xml分布在不同的Maven工程,所以必须使用该语法加载!

5.4 springmvc.xml配置

    
    <?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">
    
        <!-- 1.扫描控制器 -->
        <context:component-scan base-package="com.yiidian.controller"/>
    
        <!-- 2.视图解析器 -->
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="prefix" value="/pages/"/>
            <property name="suffix" value=".jsp"/>
        </bean>
    
        <!-- 3.创建处理器映射器和处理器适配器 -->
        <mvc:annotation-driven/>
    </beans>

5.5 编写UserController

    
    package com.yiidian.controller;
    
    import com.yiidian.domain.User;
    import com.yiidian.service.UserService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    import java.util.List;
    
    /**
     * 控制器
     * 一点教程网 - www.yiidian.com
     */
    @Controller
    @RequestMapping("/user")
    public class UserController {
        @Autowired
        private UserService userService;
    
        /**
         * 查询所有用户
         */
        @RequestMapping("/list")
        public String list(Model model){
            //调用业务层方法
            List<User> list = userService.findAll();
    
            //存入数据到request域
            model.addAttribute("list",list);
            //返回list.jsp页面
            return "list";
        }
    }
    

5.6 编写JSP显示数据

    
    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
    <html>
    <head>
        <title>一点教程网-显示用户数据</title>
    </head>
    <body>
    <h3>用户列表</h3>
    | 编号|用户名|生日|性别|地址|
| :-----: | :-----: | :-----: | :-----: | :-----: | 
| 编号 | 用户名 | 生日 | 性别 | 地址 | 
| ${user.id} | ${user.username} | ${user.birthday} | ${user.sex} | ${user.address} | 

    </body>
    </html>
    

5.7 最终项目结构

2021050310144725111.png

5.8 运行Web项目,访问测试

2021050310144742212.png

源码下载:https://pan.baidu.com/s/1zvoP6pQAK9zADZRtSrEh4w

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