参考:https://blog.csdn.net/maoyeqiu/article/details/54573294
参考:http://www.cnblogs.com/Brake/p/create_maven_multi_module_project_via_intellij_idea.html
参考:https://blog.csdn.net/u012129558/article/details/78423511
通过一个简单的demo,练习一下idea多模块聚合开发,将项目分为简单的三层架构:web,service,dao
一、创建项目
创建项目,建立父模块(这个模块的主要作用是管理依赖,用来被子模块继承用的)
maven的project和eclipse的workspace的对比
1、maven的project下有多个module,eclipse的workspace下有多个project
2、module之间可以相互独立,也可以相互依赖,所有的maven组成一个完整的项目
3、eclipse中的project之间没有啥关系,各自都是独立的完整项目。
然后 直接 next->finish
建好之后的目录:
父模块没有任何代码逻辑,src可以直接删除掉
在pom.xml中引入SSH需要的所有依赖:
<?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.xiaowen.webproject</groupId>
<artifactId>ssh</artifactId>
<packaging>pom</packaging>
<version>1.0-SNAPSHOT</version>
<!-- 属性 -->
<properties>
<spring.version>4.2.4.RELEASE</spring.version>
<hibernate.version>5.0.7.Final</hibernate.version>
<struts.version>2.3.24</struts.version>
</properties>
<!-- 锁定版本,struts2-2.3.24、spring4.2.4、hibernate5.0.7 -->
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</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-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>${hibernate.version}</version>
</dependency>
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-core</artifactId>
<version>${struts.version}</version>
</dependency>
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-spring-plugin</artifactId>
<version>${struts.version}</version>
</dependency>
</dependencies>
</dependencyManagement>
<!-- 依赖管理 -->
<dependencies>
<!-- spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
</dependency>
<!-- hibernate -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
</dependency>
<!-- 数据库驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
<scope>runtime</scope>
</dependency>
<!-- c3p0 -->
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.2</version>
</dependency>
<!-- 导入 struts2 -->
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-core</artifactId>
</dependency>
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-spring-plugin</artifactId>
</dependency>
<!-- servlet jsp -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jsp-api</artifactId>
<version>2.0</version>
<scope>provided</scope>
</dependency>
<!-- 日志 -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.2</version>
</dependency>
<!-- jstl -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
</dependencies>
</project>
右下角出现:
选择:Enable Auto-import
或者:
二、创建dao模块
右击ssh-parent:
finish:
新建Customer实体类映射数据库customer表
新建CustomerDao,多Customer做一个简单的查询操作
在resources中新建spring配置文件和hibernate配置文件
在spring中管理Customer和CustomerDao
applicationContext.dao.xml:
<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.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.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- 数据库连接池 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver" />
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/maven" />
<property name="user" value="root" />
<property name="password" value="root" />
</bean>
<!-- 配置sessionFactory -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
<!-- 依赖dataSource -->
<property name="dataSource" ref="dataSource"/>
<!-- 创建工厂需要加载hibernate映射文件 -->
<property name="configLocations" value="classpath:hibernate.cfg.xml"></property>
</bean>
<bean id="customerDao" class="com.xiaowen.dao.impl.CustomerDaoImpl">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
</beans>
hibernate.cfg.xml:
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<!-- 会话工厂 -->
<session-factory>
<!-- 数据库方言,根据数据库选择 -->
<property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property>
<!--为了方便调试是否在运行hibernate时在日志中输出sql语句 -->
<property name="hibernate.show_sql">true</property>
<!-- 是否对日志中输出的sql语句进行格式化 -->
<property name="hibernate.format_sql">true</property>
<!--关闭自动建表-->
<property name="hibernate.hbm2ddl.auto">none</property>
<!-- 加载映射文件 -->
<mapping resource="com/xiaowen/entity/Customer.hbm.xml"/>
</session-factory>
</hibernate-configuration>
三、创建service模块
创建流程与创建dao模块相同:
service模块需要依赖dao模块,所以在service的pom.xml中添加对dao的依赖:
然后创建CustomerService,放入spring中管理:
在CustomerService中需要用到CustomerDao,所以需要引入applicationContext.dao.xml,如果前面不添加依赖,这里就无法引入。
applicationContext.service.xml:
<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.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.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<import resource="applicationContext.dao.xml"/>
<bean id="customerService" class="com.xiaowen.service.impl.CustomerServiceImpl">
<property name="customerDao" ref="customerDao"></property>
</bean>
</beans>
四、创建web层
创建web选择模板进行创建:
然后就和前面的流程一样:
目录补全,需要手动创建一下:
web模块需要用到service模块,所以就在web模块的pom.xml文件中添加对service模块的依赖:
<dependencies>
<dependency>
<groupId>com.xiaowen</groupId>
<artifactId>ssh-service</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
</dependencies>
新建页面,创建Action,配置struts,将Action实体放入Spring管理
业务流程:从前台页面传入custId,查询用户名称,然后显示在前台:
CustomerAction:
package com.xiaowen.action;
import com.opensymphony.xwork2.ActionSupport;
import com.xiaowen.entity.Customer;
import com.xiaowen.service.CustomerService;
public class CustomerAction extends ActionSupport {
private Long custId;
private Customer customer;
private CustomerService customerService;
public String findCustomerById(){
System.out.println("用户id:"+custId);
customer = customerService.findById(custId);
System.out.println("查询到的用户名:"+customer.getCustName());
return SUCCESS;
}
public Long getCustId() {
return custId;
}
public void setCustId(Long custId) {
this.custId = custId;
}
public Customer getCustomer() {
return customer;
}
public void setCustomer(Customer customer) {
this.customer = customer;
}
public void setCustomerService(CustomerService customerService) {
this.customerService = customerService;
}
}
Action用到了service和dao,所以web模块需要添加对service模块的依赖,而service添加了对dao的依赖,又因为依赖会传递 所以在web模块就不需要主动添加对dao模块的依赖了。
struts.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<!-- 配置常量 -->
<!-- 字符集 -->
<constant name="struts.i18n.encoding" value="UTF-8"></constant>
<!-- 开发模式 -->
<constant name="struts.devMode" value="true"></constant>
<!-- 主题 -->
<constant name="struts.ui.theme" value="simple"></constant>
<!-- 扩展名 -->
<constant name="struts.action.extension" value="action"></constant>
<package name="customer" namespace="/" extends="struts-default">
<action name="findById" class="customerAction" method="findCustomerById">
<result name="success">/index.jsp</result>
</action>
</package>
</struts>
applicationContext.action.xml:
<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.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.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<!--action的scope要选择prototype,多例模式,单例就成servlet了-->
<bean id="customerAction" class="com.xiaowen.action.CustomerAction" scope="prototype">
<property name="customerService" ref="customerService"></property>
</bean>
<import resource="applicationContext.service.xml"></import>
</beans>
index.jsp:
<%--
Created by IntelliJ IDEA.
User: xiaowen
Date: 2018/6/27
Time: 下午10:19
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Title</title>
</head>
<body>
大家好我是:
${customer.custName}
</body>
</html>
最后一步,配置web.xml,不然前面都是白扯:
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>Archetype Created Web Application</display-name>
<!--===================监听spring====================================-->
<!--让spring随web启动-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--配置spring配置文件位置参数-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.action.xml</param-value>
</context-param>
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
运行后在浏览器输入:http://localhost:8080/sshweb/findById.action?custId=1