利用maven整合SSH步骤以及源码解析可以更好的深入理解

来源：互联网发布：deepskystacker mac 编辑：程序博客网时间：2024/05/16 19:28
一、首先我们要知道依赖传递这个名词。我们在项目中添加组件的时候会发现点击添加一个组建时候，在pom.xml文件里会发现许多jar包.
这就是依赖传递的结果。
二、依赖也会带来jar包版本的冲突。我们可以采用以下几种方法来解决版本冲突。
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>  <groupId>org.springframework</groupId>  <artifactId>spring-beans</artifactId>  <version>4.2.4.RELEASE</version>  </dependency>

</dependency>

2.
二、依赖也会带来jar包版本的冲突。我们可以采用以下几种方法来解决版本冲突。
1.第一声明优先原则

1、 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>
〈！--如下代码将说明项目将该jar包排除-->
  <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>

三构建项目（
需求:传客户id页面上显示客户信息。准备数据库
）
1.创建数据库。
2.创建数据表
3.完善pomlx.（把ssh相关依赖都添加上去）

<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>pds.ssh</groupId><artifactId>sshmaven</artifactId><version>0.0.1-SNAPSHOT</version><packaging>war</packaging><name>sshmaven项目</name><description>这是我利用maven搭建ssh框架</description><!-- 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><plugin><groupId>org.apache.tomcat.maven</groupId><artifactId>tomcat7-maven-plugin</artifactId><version>2.2</version><configuration><port>8888</port><path>/sshmaven</path></configuration></plugin><!-- 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></plugins></build></project>

4.完成实体代码的书写

6.完成其他代码的书写
mport 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 {@Overridepublic 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;}@Overridepublic 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;}}


6，在web.xml添加spring监听器的书写
<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>

7发布运行即可
二、依赖也会带来jar包版本的冲突。我们可以采用以下几种方法来解决版本冲突。
1.第一声明优先原则
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