java使用maven项目（二）分模块开发
1 整合ssh框架
1.1 依赖传递
只添加了一个struts2-core依赖，发现项目中出现了很多jar，
这种情况 叫 依赖传递
1.2 依赖版本冲突的解决
1、 第一声明优先原则
<dependencies> <!-- spring-beans-4.2.4 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>4.2.4.RELEASE</version> </dependency> <!-- spring-beans-3.0.5 --> <dependency> <groupId>org.apache.struts</groupId> <artifactId>struts2-spring-plugin</artifactId> <version>2.3.24</version> </dependency>
2、 路径近者优先原则
自己添加jar包
<dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>4.2.4.RELEASE</version> </dependency>
3、 排除原则
<dependency> <groupId>org.apache.struts</groupId> <artifactId>struts2-spring-plugin</artifactId> <version>2.3.24</version> <exclusions> <exclusion> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> </exclusion> </exclusions> </dependency>
4、 版本锁定原则
<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>${spring.version}</version> </dependency> </dependencies> </dependencyManagement>
需求：
传客户ID 页面上显示客户信息
准备数据库
1.3 构建项目
1、 创建数据库，
2、 执行准备好的sql脚本
Sql脚本的位置：
3、 完善pom.xml文件，把ssh相关的依赖都添加上去
<!-- 属性 --> <properties> <spring.version>4.2.4.RELEASE</spring.version> <hibernate.version>5.0.7.Final</hibernate.version> <struts.version>2.3.24</struts.version> </properties> <!-- 锁定版本，struts2-2.3.24、spring4.2.4、hibernate5.0.7 --> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${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> <!-- junit --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.9</version> <scope>test</scope> </dependency> <!-- jstl --> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> </dependencies> <build> <plugins> <!-- 设置编译版本为1.7 --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.7</source> <target>1.7</target> <encoding>UTF-8</encoding> </configuration> </plugin> <!-- maven内置 的tomcat6插件 --> <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>tomcat-maven-plugin</artifactId> <version>1.1</version> <configuration> <!-- 可以灵活配置工程路径 --> <path>/ssh</path> <!-- 可以灵活配置端口号 --> <port>8080</port> </configuration> </plugin> </plugins> </build>
4、 完成实体类代码
5、 完成dao代码
接口
package cn.itcast.dao; import cn.itcast.entity.Customer; public interface CustomerDao { public Customer getById(Long id); }
实现类
package com.itcast.dao.impl; import org.springframework.orm.hibernate5.support.HibernateDaoSupport; import cn.itcast.dao.CustomerDao; import cn.itcast.entity.Customer; public class CustomerDaoImpl extends HibernateDaoSupport implements CustomerDao { @Override public Customer getById(Long id) { return this.getHibernateTemplate().get(Customer.class, id); } }
6、 完成service代码
接口
package com.itcast.service; import cn.itcast.entity.Customer; public interface CustomerService { public Customer getById(Long id); }
实现类
package com.itcast.service.impl; import com.itcast.service.CustomerService; import cn.itcast.dao.CustomerDao; import cn.itcast.entity.Customer; public class CustomerServiceImpl implements CustomerService { private CustomerDao customerDao; public void setCustomerDao(CustomerDao customerDao) { this.customerDao = customerDao; } @Override public Customer getById(Long id) { return customerDao.getById(id); } }
7、 完成action代码
package cn.itcast.action; import com.itcast.service.CustomerService; import com.opensymphony.xwork2.ActionSupport; import cn.itcast.entity.Customer; public class CutomerAction extends ActionSupport { //两个成员变量 private Customer customer; private Long custId; public Customer getCustomer() { return customer; } public void setCustomer(Customer customer) { this.customer = customer; } private CustomerService customerService; public void setCustomerService(CustomerService customerService) { this.customerService = customerService; } public Long getCustId() { return custId; } public void setCustId(Long custId) { this.custId = custId; } public String findById(){ customer = customerService.getById(custId); return SUCCESS; } }
8、 拷贝配置文件并修改
从如下图位置拿到配置文件
放入到 src/main/resources目录中
修改内容 略
9、 修改web.xml 添加spring的监听
<listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param>
10、 运行项目
2 分模块开发
依赖范围对依赖传递造成的影响
父工程来管理 聚合
2.1 创建父工程：
1、
2、创建出的父工程如下
3、在pom.Xml中添加以下信息：
<!-- 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> <!-- junit --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.9</version> <scope>test</scope> </dependency> <!-- jstl --> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> </dependencies> <build> <plugins> <!-- 设置编译版本为1.7 --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.7</source> <target>1.7</target> <encoding>UTF-8</encoding> </configuration> </plugin> <!-- maven内置 的tomcat6插件 --> <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>tomcat-maven-plugin</artifactId> <version>1.1</version> <configuration> <!-- 可以灵活配置工程路径 --> <path>/ssh</path> <!-- 可以灵活配置端口号 --> <port>8080</port> </configuration> </plugin> </plugins> </build>
4、发布到本地仓库
dao service web
2.2 创建dao子模块
1、在ssh-parent项目上右击 ，创建时选择 Maven Module
2、填写子模块名称ssh-dao
3、把属于dao的代码拷贝到 该模块中：
4、完成后发布到本地仓库中
2.3 创建service子模块
1、创建方式如上：
2、把属于service的代码拷贝到该工程中
3、发布到本地仓库中
2.4 创建Action子模块
1、选择war的打包方式
2、 拷贝属于action的代码和配置文件
3、 修改web.xml 添加spring监听
<listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:applicationContext-*.xml</param-value> </context-param>
4、添加页面：
