一 . 需求
学了这么久的ssh,一直都是别人整合好的框架去写代码,自己实际动手时才发现框架配置真是很坑爹,一不小心就踏错,真是纸上得来终觉浅!
本文将记录整合struts + spring的过程 ,都是采用目前最新的 jar包,spring 是4.0.2,struts是2.3.16版本.
本篇文章是在上一篇文章使用spring
4.0 + maven 构建超简单的web项目的基础上完成的,把上一个项目copy一份,改一下名称即可,然后接着往下看。
二.实现
1.效果图
2.项目架构图:
3.实现代码:
pom.xml
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.amos</groupId>
<artifactId>ssh_integrated</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>ssh_integrated Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.0.2.RELEASE</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.0.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-core</artifactId>
<version>2.3.16</version>
</dependency>
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-spring-plugin</artifactId>
<version>2.3.16</version>
</dependency>
</dependencies>
<build>
<finalName>ssh_integrated_struts2</finalName>
</build>
</project>
注:这里要注意一下引入的struts2的插件.
com.amos.web.HelloActionSpring.java
package com.amos.web;
import org.apache.struts2.ServletActionContext;
import org.springframework.context.ApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import com.amos.service.IHello;
import com.opensymphony.xwork2.ActionContext;
public class HelloActionSpring {
private IHello hello;
public String hellomethod(){
ApplicationContext applicationContext = WebApplicationContextUtils.getRequiredWebApplicationContext(ServletActionContext.getServletContext());
hello= applicationContext.getBean(IHello.class);
String sayHi = hello.sayHi();
ActionContext.getContext().put("msg", sayHi);
return "SUCCESS";
}
}
注:这里使用的是手工去加载beans.xml,可以实现action的功能,但这种方式不推荐,没有完全实现spring和struts的集成.
com.amos.web.HelloAction.java
package com.amos.web;
import com.amos.service.IHello;
import com.opensymphony.xwork2.ActionContext;
public class HelloAction {
private IHello hello;
public void setHello(IHello hello) {
this.hello = hello;
}
public String hellomethod(){
String sayHi = hello.sayHi();
ActionContext.getContext().put("msg", sayHi);
return "SUCCESS";
}
}
注:这里暴露一个set方法,让spring去注入,以达到spring管理struts的bean的目的.
struts.xml
<?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.objectFactory.spring.autoWire" value="type"></constant>
<package name="hellopackage" extends="struts-default"
namespace="/">
<action name="helloaction" class="com.amos.web.HelloAction"
method="hellomethod">
<result name="SUCCESS" type="dispatcher">
success.jsp
</result>
</action>
</package>
</struts>
注:spring和struts集成要用到sturts2的一个插件如下所示:
struts2-spring-plugin-2.3.16-sources.jar/struts-plugin.xml
<constant name="struts.objectFactory" value="spring" />
这里就是把struts的bean交给spring管理.
struts2-core-2.3.16-sources.jar/org/apache/struts2/default.properties
### valid values are: name, type, auto, and constructor (name is the default)
struts.objectFactory.spring.autoWire = type
这里表示注入的方式是根据类型,因为类型一般只有一个,但名称有可能会重复.
4.遇到的问题
1).异常如下:
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/ssh_integrated]]
at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:252)
at java.util.concurrent.FutureTask.get(FutureTask.java:111)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:800)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:722)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/ssh_integrated]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
... 7 more
Caused by: java.lang.IllegalArgumentException: Filter mapping specifies an unknown filter name sturts2
at org.apache.catalina.core.StandardContext.validateFilterMap(StandardContext.java:3040)
at org.apache.catalina.core.StandardContext.addFilterMap(StandardContext.java:3005)
at org.apache.catalina.deploy.WebXml.configureContext(WebXml.java:1271)
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1346)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:878)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:376)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5322)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 7 more
写错单词了:strtus-default
2)异常如下:
WARNING: Could not create JarEntryRevision for [jar:file:/home/amosli/develop/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/ssh_integrated_struts2/WEB-INF/lib/struts2-spring-plugin-2.3.16.jar]!
java.lang.NoClassDefFoundError: org/apache/commons/io/FileUtils
at com.opensymphony.xwork2.util.fs.JarEntryRevision.build(JarEntryRevision.java:50)
at com.opensymphony.xwork2.util.fs.DefaultFileManager.monitorFile(DefaultFileManager.java:97)
at com.opensymphony.xwork2.util.fs.DefaultFileManager.loadFile(DefaultFileManager.java:74)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles(XmlConfigurationProvider.java:1011)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadDocuments(XmlConfigurationProvider.java:165)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.init(XmlConfigurationProvider.java:132)
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:233)
缺少jar包.pom.xml加上:
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
5.本文源码
https://github.com/amosli/ssh_integrated_spring_struts2
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