这两天正在试验Struts2与Spring框架的整合,和他们各自的“注解”。今天就总结一下这两个框架怎么用注解进行整合。
一,加入两者的依赖包,除了两者的必要依赖外,还需要导入struts2-spring-plugin.jar来完成两者的整合。
<dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>3.0.5.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>3.0.5.RELEASE</version> </dependency> <dependency> <groupId>org.apache.struts</groupId> <artifactId>struts2-core</artifactId> <version>2.2.1</version> </dependency> <dependency> <groupId>org.apache.struts</groupId> <artifactId>struts2-convention-plugin</artifactId> <version>2.2.1</version> </dependency> <dependency> <groupId>org.apache.struts</groupId> <artifactId>struts2-spring-plugin</artifactId> <version>2.2.1</version> </dependency>
二,web.xml的配置:在此需要用context-param标签添加Spring的配置文件的位置,并且添加Spring的contextLoaderListener监听,自动装配ApplicationContext(再次出就是bean.xml文件)的配置信息
<context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:beans.xml</param-value> </context-param> <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> <init-param> <param-name>actionPackages</param-name> <param-value>org.toybrick.pro.action</param-value> </init-param> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>*.action</url-pattern> </filter-mapping> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>*.jsp</url-pattern> </filter-mapping> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener>
三,beans.xml Spring配置文件,因为我们要用注解的形式来进行配置,所以这里我们就不要再spring配置文件里声明bean了。在这里需要通过component-scan标签
开启自动Spring的自动扫描功能(多个包之间用逗号隔开)
<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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd "> <context:component-scan base-package="org.toybrick.pro.dao.impl,org.toybrick.pro.action"></context:component-scan> </beans>
四,struts.xml ,需要要让spring来管理Struts2的对象
<struts> <constant name="struts.i18n.encoding" value="UTF-8" /> <constant name="objectFactory" value="spring"/> </struts>
五,登陆逻辑处理类,将所有的action都是用注解形式类声明。注意紫色部分我们将这个类声明为了一个springbean并规定了scope为prototype。注意红色部分,我们用注解形式注入了一个属性。@Autowired注解用来注入属性,但是默认的注入形式是按类型注入,@Quality注解用来将注入类型修改为按名称注入。
@Namespace("/main/user") @ParentPackage(value="struts-default") @Results({ @Result(name="success" , location="/main/desktop/desktop.jsp"), @Result(name="fail" , location="/main/user/login.jsp") }) @Service(value="userAction") @Scope(value="prototype") public class UserAction extends BaseAction { private static final long serialVersionUID = 1L; @Autowired @Qualifier("userDao") private UserDao userDao; private User entity; @Action("login") public String login(){ String result=""; try { userDao.login(entity); result="success"; } catch (ServiceException e) { System.out.println(e.getMessage()); this.setMessage(e.getMessage()); result="fail"; e.printStackTrace(); } return result; } @Override public void validate() { if(entity == null){ entity = new User(); } if(entity.getName() == null || "".equals(entity.getName())){ addFieldError("message", "用户名不可为空!"); } if(entity.getPassw() == null || "".equals(entity.getPassw())){ addFieldError("message", "密码不可为空!"); } } public User getEntity() { return entity; } public void setEntity(User entity) { this.entity = entity; } }
六,数据访问对象(DAO)的实现类,我们将它声明为一个spring bean,用来注入到上面的UserAction中。
@Repository(value="userDao") public class UserDaoImpl implements UserDao { public void login(User user) throws ServiceException { ServiceException e = new ServiceException(); if( ! user.getName().equals(user.getPassw())){ e.setMessage("用户名密码错误!"); throw e; } }
七,登陆页面(用了bootstrap框架)
<div class="panel panel-primary" style="margin:100px;"> <div class="panel-heading">登录</div> <div class="panel-body"> <form action="<%=contextPath%>/main/user/login.action" method="post" class="col-md-4 col-md-offset-4" > <div class="alert alert-warning" role="alert"><s:property value="message"/></div> <div class="input-group margin"> <span class="input-group-addon" id="userNameAddon" >账号</span> <input type="text" id="userName" name="entity.name" value="" class="form-control" required placeholder="用户名/邮箱/手机号" aria-describedby="userNameAddon"/> </div> <div class="input-group margin"> <span class="input-group-addon" id="passwordAddon" >密码</span> <input type="password" id="password" name="entity.passw" value="" class="form-control" required placeholder="密码" aria-describedby="passwordAddon"/> </div> <button type="submit" class="btn btn-block btn-primary margin">登录</button> </form> </div> </div>
到此,我们就完成了以注解形式整合Struts2和Spring两大框架。