java使用maven項目（二）分模塊開發
1 整合ssh框架
1.1 依賴傳遞
只添加了一個struts2-core依賴，發現項目中出現了不少jar，java
這種狀況 叫 依賴傳遞mysql
1.2 依賴版本衝突的解決
一、 第一聲明優先原則web
<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>
二、 路徑近者優先原則spring
本身添加jar包sql
<dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>4.2.4.RELEASE</version> </dependency>
三、 排除原則數據庫
<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>
四、 版本鎖定原則apache
<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> <!-- 鎖定版本，struts2-2.3.2四、spring4.2.四、hibernate5.0.7 --> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> </dependencies> </dependencyManagement>
需求：api
傳客戶ID 頁面上顯示客戶信息tomcat
準備數據庫app
1.3 構建項目
一、 建立數據庫，
二、 執行準備好的sql腳本
Sql腳本的位置：
三、 完善pom.xml文件，把ssh相關的依賴都添加上去
<!-- 屬性 --> <properties> <spring.version>4.2.4.RELEASE</spring.version> <hibernate.version>5.0.7.Final</hibernate.version> <struts.version>2.3.24</struts.version> </properties> <!-- 鎖定版本，struts2-2.3.2四、spring4.2.四、hibernate5.0.7 --> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${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> <!-- 依賴管理 --> <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> <!-- 數據庫驅動 --> <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> <!-- 導入 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> <!-- 日誌 --> <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> <!-- 設置編譯版本爲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內置 的tomcat6插件 --> <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>tomcat-maven-plugin</artifactId> <version>1.1</version> <configuration> <!-- 能夠靈活配置工程路徑 --> <path>/ssh</path> <!-- 能夠靈活配置端口號 --> <port>8080</port> </configuration> </plugin> </plugins> </build>
四、 完成實體類代碼
五、 完成dao代碼
接口
package cn.itcast.dao; import cn.itcast.entity.Customer; public interface CustomerDao { public Customer getById(Long id); }
實現類
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); } }
六、 完成service代碼
接口
package com.itcast.service; import cn.itcast.entity.Customer; public interface CustomerService { public Customer getById(Long id); }
實現類
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); } }
七、 完成action代碼
package cn.itcast.action; import com.itcast.service.CustomerService; import com.opensymphony.xwork2.ActionSupport; import cn.itcast.entity.Customer; public class CutomerAction extends ActionSupport { //兩個成員變量 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; } }
八、 拷貝配置文件並修改
從以下圖位置拿到配置文件
放入到 src/main/resources目錄中
修改內容 略
九、 修改web.xml 添加spring的監聽
<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>
十、 運行項目
2 分模塊開發
依賴範圍對依賴傳遞形成的影響
父工程來管理 聚合
2.1 建立父工程：
一、
二、建立出的父工程以下
三、在pom.Xml中添加如下信息：
<!-- 屬性 --> <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> <!-- 鎖定版本，struts2-2.3.2四、spring4.2.四、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> <!-- 依賴管理 --> <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> <!-- 數據庫驅動 --> <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> <!-- 導入 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> <!-- 日誌 --> <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> <!-- 設置編譯版本爲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內置 的tomcat6插件 --> <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>tomcat-maven-plugin</artifactId> <version>1.1</version> <configuration> <!-- 能夠靈活配置工程路徑 --> <path>/ssh</path> <!-- 能夠靈活配置端口號 --> <port>8080</port> </configuration> </plugin> </plugins> </build>
四、發佈到本地倉庫
dao service web
2.2 建立dao子模塊
一、在ssh-parent項目上右擊 ，建立時選擇 Maven Module
二、填寫子模塊名稱ssh-dao
三、把屬於dao的代碼拷貝到 該模塊中：
四、完成後發佈到本地倉庫中
2.3 建立service子模塊
一、建立方式如上：
二、把屬於service的代碼拷貝到該工程中
三、發佈到本地倉庫中
2.4 建立Action子模塊
一、選擇war的打包方式
二、 拷貝屬於action的代碼和配置文件
三、 修改web.xml 添加spring監聽
<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>
四、添加頁面：
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