008_Maven Eclipse

于 2021-12-20 14:30:03 发布
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分类专栏： Maven 文章标签： maven eclipse java
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本文链接：https://blog.youkuaiyun.com/aihiao/article/details/122039576
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本文介绍如何在Eclipse中配置Maven并搭建一个多模块项目，包括父模块Shop_Parent及子模块Shop_Dao、Shop_Service和Shop_Web，并详细展示了各模块的pom.xml配置、依赖管理、服务实现及Web层的控制器。

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1. Eclipse提供了一个很好的插件m2eclipse, 该插件能将Maven和Eclipse集成在一起。

2. 在最新的Eclipse中自带了Maven, 我们打开, Windows->Preferences->Maven->Installations, 会出现下面的画面:

3. Eclipse配置的默认仓库和配置文件 

4. Eclipse配置自己的Maven

4.1. Windows->Preferences->Maven->Installations->Add, 出现下面的画面:

 

4.2. Directory->选取自己Maven的位置 

4.3. 点击Finish, 会出现下面的画面: 

4.4. 找到自己Maven中settings.xml的位置, 配置默认仓库位置 

4.5. User Settings->Browse->找到自己Maven中settings.xml的位置->Update Settings 

5. 配置JDK版本

5.1. Eclipse创建的Maven工程, 默认的JDK版本是1.5

 

5.2. 配置编译插件, 设定JDK版本, 工程会报错, 需要更新工程。 

5.3. 右键工程——>Maven——>Update Project 

5.4. 勾选要更新的工程——>点击Ok按钮 

5.5. 更改JDK版本成功 

6. 依赖管理例子

6.1. 通常情况下, 在一个共通的项目下, 有一系列的项目。在这种情况下, 我们可以创建一个公共依赖的pom文件, 该pom包含所有的公共的依赖关系, 我们称其为其他子项目pom的pom父。

6.2. 接下来的一个例子可以帮助你更好的理解这个概念。

6.3. 接下来是上面依赖图的详情说明:

  • Shop_Web依赖于Shop_Service。
  • Shop_Service依赖于Shop_Dao。
  • Shop_Dao依赖于Shop_Parent。
  • Shop_Parent是Shop_Dao、Shop_Service和Shop_Web的父项目。
  • Shop_Parent在它的依赖部分定义了spring-core-4.2.4.RELEASE.jar、spring-web-4.2.4.RELEASE.jar和slf4j-api-1.7.32.jar作为依赖。

6.4. 新建Shop_Parent父工程

6.4.1. New——>Maven Project

 6.4.2. New Maven project

6.4.3. Shop_Parent是一个pom聚合工程 

6.5. New——>Maven Module——>Shop_Dao是一个jar工程, 父工程是Shop_Parent 

6.6. New——>Maven Module——>Shop_Service是一个jar工程, 父工程是Shop_Parent 

6.7. New——>Maven Module——>Shop_Web是一个war工程, 父工程是Shop_Parent 

6.8. Shop_Service依赖Shop_Dao 

6.9. Shop_Web依赖Shop_Service 

6.10. 修改Shop_Parent的pom.xml 

<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.bjbs</groupId>
	<artifactId>Shop_Parent</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>pom</packaging>

	<modules>
		<module>Shop_Dao</module>
		<module>Shop_Service</module>
		<module>Shop_Web</module>
	</modules>

	<dependencies>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>4.2.4.RELEASE</version>
			<exclusions>
				<exclusion>
					<groupId>commons-logging</groupId>
					<artifactId>commons-logging</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>4.2.4.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aspects</artifactId>
			<version>4.2.4.RELEASE</version>
		</dependency>
		
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>8.0.27</version>
		</dependency>
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>3.3.1</version>
		</dependency>
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis-spring</artifactId>
			<version>1.2.5</version>
		</dependency>
		<dependency>
			<groupId>com.mchange</groupId>
			<artifactId>c3p0</artifactId>
			<version>0.9.2</version>
		</dependency>
		
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>jcl-over-slf4j</artifactId>
			<version>1.7.32</version>
		</dependency>
		<dependency>
			<groupId>ch.qos.logback</groupId>
			<artifactId>logback-core</artifactId>
			<version>1.2.7</version>
		</dependency>
		<dependency>
			<groupId>ch.qos.logback</groupId>
			<artifactId>logback-classic</artifactId>
			<version>1.2.7</version>
		</dependency>
		
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jsp-api</artifactId>
			<version>2.0</version>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.5.1</version>
				<configuration>
					<source>1.8</source>
					<target>1.8</target>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>

6.11. Shop_Dao的pom.xml

 6.12. Shop_Dao下创建User.java

package com.bjbs.pojo;

import java.io.Serializable;
import java.util.Date;

public class User implements Serializable {
	private static final long serialVersionUID = 1L;

	private Integer id;
	private String username;
	private String password;
	private Date registertime;

	public User() {
	}

	public User(String username, String password, Date registertime) {
		this.username = username;
		this.password = password;
		this.registertime = registertime;
	}
	
	public User(Integer id, String username, String password, Date registertime) {
		this.id = id;
		this.username = username;
		this.password = password;
		this.registertime = registertime;
	}

	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 String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public Date getRegistertime() {
		return registertime;
	}

	public void setRegistertime(Date registertime) {
		this.registertime = registertime;
	}

	@Override
	public String toString() {
		return "User [id=" + id + ", username=" + username + ", password=" + password + ", registertime=" + registertime
				+ "]";
	}

}

6.13. Shop_Dao下创建UserMapper.java

package com.bjbs.dao;

import java.util.List;
import com.bjbs.pojo.User;

public interface UserMapper {
	public List<User> selectUser();

	public void insertUser(User u);
}

6.14. Shop_Dao下和UserMapper.java相同包下创建UserMapper.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.bjbs.dao.UserMapper">
	<select id="selectUser" resultType="com.bjbs.pojo.User">
		select * from user
	</select>
	
	<select id="insertUser" resultType="java.lang.Integer" parameterType="com.bjbs.pojo.User">
		insert into user values(null,#{username},#{password},#{registertime})
	</select>
</mapper>

6.15. Shop_Dao下src/main/resources下创建spring文件夹, 然后在spring文件夹下创建applicationContext-dao.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	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-4.0.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd">

	<!-- 加载配置文件 -->
   <context:property-placeholder location="classpath:jdbc.properties" />

	<!-- 配置C3P0连接池 -->
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
		<property name="driverClass" value="${jdbc.driver}"></property>
		<property name="jdbcUrl" value="${jdbc.url}"/>
		<property name="user" value="${jdbc.username}"></property>
		<property name="password" value="${jdbc.password}"></property>
	</bean>
	
	<!-- SqlSessionFactory配置 -->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<!-- 加载mybatis核心配置文件 -->
		<property name="configLocation" value="classpath:SqlMapConfig.xml" />
	</bean>
	
	<!-- 动态代理, 包扫描(推荐) -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    	<!-- basePackage多个包用","分隔 -->
    	<property name="basePackage" value="com.bjbs.dao" />
    </bean>
    
</beans>

6.16. Shop_Dao下src/main/resources下创建SqlMapConfig.xml

6.17. Shop_Dao下src/main/resources下创建jdbc.properties 

6.18. Shop_Dao下src/main/resources的jdbc.properties、SqlMapConfig.xml和spring/applicationContext-dao.xml 

6.19. Shop_Service的pom.xml

6.20. Shop_Service下创建UserService.java 

package com.bjbs.service;

import java.util.List;
import com.bjbs.pojo.User;

public interface UserService {
	List<User> selectUser();
}

6.21.Shop_Service下创建UserServiceImpl.java

package com.bjbs.service.impl;

import java.util.List;
import javax.annotation.Resource;
import org.springframework.stereotype.Service;
import com.bjbs.dao.UserMapper;
import com.bjbs.pojo.User;
import com.bjbs.service.UserService;

@Service
public class UserServiceImpl implements UserService {
	@Resource
	private UserMapper userMapper;

	@Override
	public List<User> selectUser() {
		return userMapper.selectUser();
	}
}

6.22. Shop_Service下src/main/resources下创建spring文件夹, 然后在spring文件夹下创建applicationContext-service.xml

6.23. Shop_Service下src/main/resources下创建spring文件夹, 然后在spring文件夹下创建applicationContext-trans.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	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-4.0.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd 
	http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">

	<!-- 事务管理器 -->
	<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource" />
	</bean>
	
	<!-- 配置事务的增强 -->
	<tx:advice id="txAdvice" transaction-manager="transactionManager">
		<tx:attributes>
			<!-- name="*" 表示所有方法 -->
			<tx:method name="*" propagation="REQUIRED" read-only="false"/>
		</tx:attributes>
	</tx:advice>
	
	<!-- aop的配置 -->
	<aop:config>
		<aop:pointcut expression="execution(* com.bjbs.service.impl.UserServiceImpl.*(..))" id="pointcut"/>
		<aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut"/>
	</aop:config>
</beans>

6.24. Shop_Web的pom.xml

6.25. Shop_Web下创建UserAction.java

package com.bjbs.web;

import java.util.List;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import com.bjbs.pojo.User;
import com.bjbs.service.UserService;

@Controller
public class UserAction {
	@Resource
	private UserService userService;

	@RequestMapping("userList")
	public ModelAndView getItemList(String name, HttpServletRequest req) {
		ModelAndView modelAndView = new ModelAndView();
		List<User> users = userService.selectUser();
		modelAndView.addObject("userList", users);
		modelAndView.setViewName("userList");
		return modelAndView;
	}
}

6.26. Shop_Service下src/main/resources下创建spring文件夹, 然后在spring文件夹下创建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: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-4.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
	<!-- 包扫描组件, 配置自己要扫描的包路径 -->
	<context:component-scan base-package="com.bjbs.web" />
	
	<!-- 注解驱动配置，代替映射器与适配器的单独配置，同时支持json响应(推荐使用) -->
	<mvc:annotation-driven /> 
	
	<!-- 配置视图解析器 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<!-- 配置视图响应的前缀 -->
		<property name="prefix" value="/WEB-INF/jsp/" />
		<!-- 配置视图响应的后缀 -->
		<property name="suffix" value=".jsp" />
	</bean>
</beans>

6.27. Shop_Web的webapp下创建index.jsp

6.28. Shop_Web的webapp/WEB-INF下创建jsp文件夹, jsp文件夹下创建userList.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt"  prefix="fmt"%>

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title>用户列表</title>
	</head>
	<body> 
		<table width="100%" border=1>
			<tr>
				<td>用户Id</td>
				<td>用户名称</td>
				<td>创建用户日期</td>
			</tr>
			<c:forEach items="${userList }" var="user">
				<tr>
					<td>${user.id }</td>
					<td>${user.username }</td>
					<td><fmt:formatDate value="${user.registertime}" pattern="yyyy-MM-dd HH:mm:ss"/></td>
				</tr>
			</c:forEach>
		</table>
	</body>
</html>

6.29. 修改web.xml, 使用org.springframework.web.context.ContextLoaderListener监听器加载Spring配置文件, 配置文件在不同工程的classpath下, 这里的classpath一定要加*。

<?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">
	<display-name>Shop_Web</display-name>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
	<!-- 使用监听器加载Spring配置文件 -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	<!-- 加载spring配置 -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<!-- 配置文件在不同工程的classpath下, 这里的classpath一定要加* -->
		<param-value>classpath*:spring/applicationContext-*.xml</param-value>
	</context-param>
	<!-- 前端控制器 -->
	
	<context-param>
		<param-name>spring.profiles.active</param-name>
		<param-value>dev</param-value>
	</context-param>
	<context-param>
		<param-name>spring.profiles.default</param-name>
		<param-value>dev</param-value>
	</context-param>
	<context-param>
		<param-name>spring.liveBeansView.mbeanDomain</param-name>
		<param-value>dev</param-value>
	</context-param>

	<servlet>
		<servlet-name>springmvc</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<!-- 加载springmvc的核心配置文件 -->
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath:spring/springmvc.xml</param-value>
		</init-param>
	</servlet>
	<!-- 配置拦截路径 -->
	<servlet-mapping>
		<servlet-name>springmvc</servlet-name>
		<url-pattern>*.action</url-pattern>
	</servlet-mapping>
</web-app>

6.30.  Shop_Web工程结构

 6.31. 右键——>Shop_Parent——>Run As——>Maven install

6.32. 右键——>Shop_Web——>Run As——>Maven build... 

 6.33. 输入tomcat:run命令

 6.34. 运行成功, 本地仓库也有工程目录

6.35. 数据库表

6.36. 访问项目

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