我正在从 sruts2.1.6 迁移到 struts2.3.7。 ,我已将 apache 推荐的所需 jar 文件添加到我的类路径中。请检查列出的文件:-
我的web.xml如下:
<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 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>First_Struts2.3.7_Demo</display-name>
<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>
<welcome-file-list>
<welcome-file>Welcome.jsp</welcome-file>
</welcome-file-list>
</web-app>
我的 struts.xml 文件如下所示,因为我现在还没有添加任何操作:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<constant name="struts.devMode" value="false" />
<package name="default" extends="struts-default" namespace="/">
</package>
</struts>
但是当我构建类路径并在 tomcat-6 服务器 上将这个项目作为 HelloWorld 类项目运行时,出现以下错误:
org.apache.catalina.core.StandardContext filterStart
SEVERE: Exception starting filter struts2
Class: com.opensymphony.xwork2.spring.SpringObjectFactory
File: SpringObjectFactory.java
Method: getClassInstance
Line: 230 - com/opensymphony/xwork2/spring/SpringObjectFactory.java:230:-1
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:483)
at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:74)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:51)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:295)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4072)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4726)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
:754)
at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
Caused by: java.lang.NullPointerException
at com.opensymphony.xwork2.spring.SpringObjectFactory.getClassInstance(SpringObjectFactory.java:230)
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:429)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:471)
... 20 more
我不知道为什么会发生这种情况,而且我不会将 struts 与 spring 结合起来。 任何帮助都会很棒。注意:xwork-core-2.3.7 导致了错误。
最佳答案
只需在 WEB-INF/lib 中添加以下 Jars 即可。如果没有 spring,请删除所有与 spring 相关的 jar 。
asm-3.3.jar
asm-commons-3.3.jar
asm-tree-3.3.jar
commons-fileupload-1.2.2.jar
commons-io-2.0.1.jar
commons-lang3-3.1.jar
freemarker-2.3.19.jar
javaassist-3.11.0.GA.jar
ognl-3.0.5.jar
struts2-core-2.3.7.jar
xwork-core-2.3.7.jar
如果您没有上面列出的任何 jar,请下载它们。
关于java - SpringObjectFactory在struts2.3.7中创建应用程序时出错,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/13909296/