自学ssh框架 spring 和Struts 整合的时候 bean action 设为单例模式 但是每次请求还是会new 下面贴上代码 讨教各位高手
action 代码
action 代码
package com.user.action; import java.io.IOException; import com.opensymphony.xwork2.ActionSupport; import com.user.bean.User; import com.user.service.UserService; public class UserLoginAction extends ActionSupport{ /** * */ private static final long serialVersionUID = 1L; private UserService userService; private User user; public String userLogin() throws IOException{ System.out.println("userLogin this="+this); System.out.println("userService="+userService); // tuserService.userLogin(user); return "success"; } public UserLoginAction() { System.out.println("new Action--"); } public UserLoginAction(UserService userService, User user) { this.userService = userService; this.user = user; } public User getUser() { return user; } public void setUser(User user) { this.user = user; } public UserService getUserService() { return userService; } public void setUserService(UserService userService) { System.out.println("setUserService"); this.userService = userService; } }
applicationContext.xml 代码
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" 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-2.5.xsd"> <bean name="user" class="com.user.bean.User"></bean> <bean name="userService" class="com.user.service.UserService"></bean> <bean name="userloginAction" class="com.user.action.UserLoginAction" scope="singleton"> <property name="userService" ref="userService"></property> </bean> </beans>
struts.xml代码
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts> <constant name="struts.enable.DynamicMethodInvocation" value="true" /> <constant name="struts.devMode" value="false" /> <constant name="struts.i18n.encoding" value="utf-8"></constant> <package name="default" namespace="/" extends="struts-default"> <action name="userLoginAction" class="com.user.action.UserLoginAction" method="userLogin"> <result name="success">index.jsp</result> <result name="error">error.jsp</result> </action>
web.xml代码
<?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" id="WebApp_ID" version="2.5"> <display-name>score_struts2_spring</display-name> <!-- struts2配置 --> <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- Spring配置 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> </web-app>
用jsp登录页面请求action 运行结果如下 action new了三次。
运行结果
四月 15, 2017 8:28:05 下午 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons 信息: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@3c3423: defining beans [user,userService,userloginAction]; root of factory hierarchy new Action--<span style="color: #FF0000;">(第一次new action spring加载)</span> setUserService 四月 15, 2017 8:28:06 下午 org.springframework.web.context.ContextLoader initWebApplicationContext 信息: Root WebApplicationContext: initialization completed in 294 ms 四月 15, 2017 8:28:06 下午 org.apache.catalina.util.SessionIdGenerator createSecureRandom 信息: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [126] milliseconds. 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Parsing configuration file [struts-default.xml] 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Unable to locate configuration files of the name struts-plugin.xml, skipping 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Parsing configuration file [struts-plugin.xml] 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Parsing configuration file [struts.xml] 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Choosing bean (struts) for (com.opensymphony.xwork2.ObjectFactory) 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Choosing bean (struts) for (com.opensymphony.xwork2.FileManager) 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Choosing bean (struts) for (com.opensymphony.xwork2.conversion.impl.XWorkConverter) 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Choosing bean (struts) for (com.opensymphony.xwork2.TextProvider) 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Choosing bean (struts) for (com.opensymphony.xwork2.ActionProxyFactory) 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Choosing bean (struts) for (com.opensymphony.xwork2.conversion.ObjectTypeDeterminer) 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Choosing bean (struts) for (org.apache.struts2.dispatcher.mapper.ActionMapper) 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Choosing bean (jakarta) for (org.apache.struts2.dispatcher.multipart.MultiPartRequest) 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Choosing bean (struts) for (org.apache.struts2.views.freemarker.FreemarkerManager) 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Choosing bean (struts) for (org.apache.struts2.components.UrlRenderer) 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Choosing bean (struts) for (com.opensymphony.xwork2.validator.ActionValidatorManager) 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Choosing bean (struts) for (com.opensymphony.xwork2.util.ValueStackFactory) 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Choosing bean (struts) for (com.opensymphony.xwork2.util.reflection.ReflectionProvider) 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Choosing bean (struts) for (com.opensymphony.xwork2.util.reflection.ReflectionContextFactory) 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Choosing bean (struts) for (com.opensymphony.xwork2.util.PatternMatcher) 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Choosing bean (struts) for (org.apache.struts2.dispatcher.StaticContentLoader) 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Choosing bean (struts) for (com.opensymphony.xwork2.UnknownHandlerManager) 四月 15, 2017 8:28:06 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Choosing bean (struts) for (org.apache.struts2.views.util.UrlHelper) 四月 15, 2017 8:28:06 下午 org.apache.catalina.startup.HostConfig deployDirectory 信息: Deploying web application directory D:\Program Files\apache-tomcat-7.0.57\webapps\ROOT 四月 15, 2017 8:28:06 下午 org.apache.catalina.startup.HostConfig deployDirectory 信息: Deployment of web application directory D:\Program Files\apache-tomcat-7.0.57\webapps\ROOT has finished in 54 ms 四月 15, 2017 8:28:06 下午 org.apache.coyote.AbstractProtocol start 信息: Starting ProtocolHandler ["http-bio-8088"] 四月 15, 2017 8:28:06 下午 org.apache.coyote.AbstractProtocol start 信息: Starting ProtocolHandler ["ajp-bio-8009"] 四月 15, 2017 8:28:06 下午 org.apache.catalina.startup.Catalina start 信息: Server startup in 2677 ms new Action--<span style="color: #FF0000;"><span style="font-size: 12px;">(请求action的时候又会 new action 而且还是两次)</span></span> new Action-- userLogin this=com.user.action.UserLoginAction@160ac0b userLogin this=com.user.action.UserLoginAction@87bc99 userService=null userService=null
解决方案
40
在struts的配置文件中:<action name=”userLoginAction” class=”com.user.action.UserLoginAction” method=”userLogin”> 这个class的属性值,使用spring管理的bean名称, 没看错的话应该是这个“userloginAction”。