struts2：结果null未找到异常
我是struts2框架的新手，我厌倦了运行我的第一个程序，但是我得到了结果null找到了预期，我无法找到我的错误，请帮助我的人...
index.jsp的
<%@ taglib uri="/struts-tags" prefix="s"%>
<s:form action="insert">
<s:textfield name="uname" label="UserName " />
<s:textfield name="age" label="age " />
<s:textfield name="sex" label="sex" />
<s:submit name="submit" label="submit" />
</s:form>
struts.xml中
<?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>
<package name="a" extends="struts-default">
<action name="insert" class="com.infrasoft.login.action.UserRegistrationDAO">
<result name="success"></result>
<result name="error"></result>
</action>
</package>
</struts>
行动类
package com.infrasoft.login.action;
import com.opensymphony.xwork2.ActionSupport;
public class UserRegistrationDAO extends ActionSupport {
private String uname;
private String sex;
private int age;
public String getUname() {
return uname;
}
public void setUname(String uname) {
this.uname = uname;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
private static final long serialVersionUID = 1L;
public UserRegistrationDAO() {
System.out.println("dao");
}
@Override
public String execute() {
System.out.println("execute.......");
return "success";
}
} 例外
May 22, 2014 7:58:24 PM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files (x86)\Java\jre7\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program Files (x86)/Java/jre7/bin/client;C:/Program Files (x86)/Java/jre7/bin;C:/Program Files (x86)/Java/jre7/lib/i386;C:\Windows\SYSTEM32;C:\Windows;C:\Windows\SYSTEM32\WBEM;C:\Windows\SYSTEM32\WINDOWSPOWERSHELL\V1.0\;;C:\Program Files (x86)\Java\jdk1.7.0\bin;E:\Language SW\KRISHSOFT\eclipse;;.
May 22, 2014 7:58:24 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:xmlvalidationdemo' did not find a matching property.
May 22, 2014 7:58:24 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:Com.LTS.Register' did not find a matching property.
May 22, 2014 7:58:24 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:Com.Demo.Javatpoint' did not find a matching property.
May 22, 2014 7:58:24 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:com.infrasoft.struts' did not find a matching property.
May 22, 2014 7:58:24 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
May 22, 2014 7:58:24 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
May 22, 2014 7:58:25 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 1129 ms
May 22, 2014 7:58:25 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
May 22, 2014 7:58:25 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.29
May 22, 2014 7:58:25 PM org.apache.catalina.util.SessionIdGenerator createSecureRandom
INFO: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [195] milliseconds.
May 22, 2014 7:58:26 PM com.opensymphony.xwork2.config.providers.XmlConfigurationProvider register
INFO: Parsing configuration file [struts-default.xml]
May 22, 2014 7:58:26 PM com.opensymphony.xwork2.config.providers.XmlConfigurationProvider register
INFO: Parsing configuration file [struts-plugin.xml]
May 22, 2014 7:58:26 PM com.opensymphony.xwork2.config.providers.XmlConfigurationProvider register
INFO: Parsing configuration file [struts.xml]
May 22, 2014 7:58:26 PM org.apache.struts2.config.Settings getLocale
WARNING: Settings: Could not parse struts.locale setting, substituting default VM locale
May 22, 2014 7:58:26 PM com.opensymphony.xwork2.util.ObjectTypeDeterminerFactory <clinit>
INFO: Setting DefaultObjectTypeDeterminer as default ...
May 22, 2014 7:58:26 PM org.apache.catalina.loader.WebappClassLoader validateJarFile
INFO: validateJarFile(F:\workspace\StrutsProject\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\Com.LTS.Register\WEB-INF\lib\servlet-api.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
May 22, 2014 7:58:27 PM com.opensymphony.xwork2.config.providers.XmlConfigurationProvider register
INFO: Parsing configuration file [struts-default.xml]
May 22, 2014 7:58:27 PM com.opensymphony.xwork2.config.providers.XmlConfigurationProvider register
INFO: Parsing configuration file [struts-plugin.xml]
May 22, 2014 7:58:27 PM com.opensymphony.xwork2.util.DomHelper$StartHandler error
SEVERE: Document is invalid: no grammar found. at (null:2:8)
org.xml.sax.SAXParseException; systemId: file:/F:/workspace/StrutsProject/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/Com.LTS.Register/WEB-INF/classes/struts.xml; lineNumber: 2; columnNumber: 8; Document is invalid: no grammar found.
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootElementHook(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(Unknown Source)
at com.opensymphony.xwork2.util.DomHelper.parse(DomHelper.java:121)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles(XmlConfigurationProvider.java:830)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadDocuments(XmlConfigurationProvider.java:131)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.init(XmlConfigurationProvider.java:100)
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reload(DefaultConfiguration.java:130)
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:52)
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:395)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:452)
at org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:201)
at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:277)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:258)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:382)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:103)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4650)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5306)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
May 22, 2014 7:58:27 PM org.apache.catalina.core.StandardContext filterStart
SEVERE: Exception starting filter struts2
file:/F:/workspace/StrutsProject/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/Com.LTS.Register/WEB-INF/classes/struts.xml:2:8
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles(XmlConfigurationProvider.java:835)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadDocuments(XmlConfigurationProvider.java:131)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.init(XmlConfigurationProvider.java:100)
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reload(DefaultConfiguration.java:130)
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:52)
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:395)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:452)
at org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:201)
at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:277)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:258)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:382)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:103)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4650)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5306)
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.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: Document is invalid: no grammar found. - file:/F:/workspace/StrutsProject/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/Com.LTS.Register/WEB-INF/classes/struts.xml:2:8
at com.opensymphony.xwork2.util.DomHelper.parse(DomHelper.java:123)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles(XmlConfigurationProvider.java:830)
... 20 more
Caused by: org.xml.sax.SAXParseException; systemId: file:/F:/workspace/StrutsProject/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/Com.LTS.Register/WEB-INF/classes/struts.xml; lineNumber: 2; columnNumber: 8; Document is invalid: no grammar found.
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootElementHook(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(Unknown Source)
at com.opensymphony.xwork2.util.DomHelper.parse(DomHelper.java:121)
... 21 more
May 22, 2014 7:58:27 PM org.apache.catalina.core.StandardContext startInternal
SEVERE: Error filterStart
May 22, 2014 7:58:27 PM org.apache.catalina.core.StandardContext startInternal
SEVERE: Context [/Com.LTS.Register] startup failed due to previous errors
May 22, 2014 7:58:28 PM com.opensymphony.xwork2.config.providers.XmlConfigurationProvider register
INFO: Parsing configuration file [struts-default.xml]
May 22, 2014 7:58:28 PM com.opensymphony.xwork2.config.providers.XmlConfigurationProvider register
INFO: Parsing configuration file [struts-plugin.xml]
May 22, 2014 7:58:28 PM com.opensymphony.xwork2.config.providers.XmlConfigurationProvider register
INFO: Parsing configuration file [struts.xml]
May 22, 2014 7:58:28 PM org.apache.struts2.config.Settings getLocale
WARNING: Settings: Could not parse struts.locale setting, substituting default VM locale
May 22, 2014 7:58:28 PM com.opensymphony.xwork2.util.ObjectTypeDeterminerFactory <clinit>
INFO: Setting DefaultObjectTypeDeterminer as default ...
May 22, 2014 7:58:28 PM com.opensymphony.xwork2.config.providers.XmlConfigurationProvider register
INFO: Parsing configuration file [struts-default.xml]
May 22, 2014 7:58:28 PM com.opensymphony.xwork2.config.providers.XmlConfigurationProvider register
INFO: Parsing configuration file [struts-plugin.xml]
May 22, 2014 7:58:28 PM com.opensymphony.xwork2.config.providers.XmlConfigurationProvider register
INFO: Parsing configuration file [struts.xml]
May 22, 2014 7:58:28 PM org.apache.struts2.config.Settings getLocale
WARNING: Settings: Could not parse struts.locale setting, substituting default VM locale
May 22, 2014 7:58:28 PM org.apache.struts2.config.BeanSelectionProvider register
INFO: Loading global messages from java4s
May 22, 2014 7:58:29 PM com.opensymphony.xwork2.util.ObjectTypeDeterminerFactory <clinit>
INFO: Setting DefaultObjectTypeDeterminer as default ...
May 22, 2014 7:58:29 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
May 22, 2014 7:58:29 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
May 22, 2014 7:58:29 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 4182 ms
May 22, 2014 7:58:38 PM org.apache.tomcat.util.http.Parameters processParameters
INFO: Invalid chunk starting at byte [0] and ending at byte [2] with a value of [=a] ignored
Note: further occurrences of Parameter errors will be logged at DEBUG level.
dao
May 22, 2014 7:58:38 PM com.opensymphony.xwork2.validator.ActionValidatorManagerFactory <clinit>
INFO: Detected AnnotationActionValidatorManager, initializing it...
execute.......
1 个答案:
答案 0 :(得分：3)
您缺少结果视图名称。即JSP文件名，如下
<result name="success">
/HelloWorld.jsp
</result>
如果您未指定应向客户端呈现的视图名称，则结果为success或failure时框架将执行的操作
<result name="success"></result> // You are missing the JSP name here
相关问题
最新问题
- 我写了这段代码，但我无法理解我的错误
- 我无法从一个代码实例的列表中删除 None 值，但我可以在另一个实例中。为什么它适用于一个细分市场而不适用于另一个细分市场？
- 是否有可能使 loadstring 不可能等于打印？卢阿
- java中的random.expovariate()
- Appscript 通过会议在 Google 日历中发送电子邮件和创建活动
- 为什么我的 Onclick 箭头功能在 React 中不起作用？
- 在此代码中是否有使用“this”的替代方法？
- 在 SQL Server 和 PostgreSQL 上查询，我如何从第一个表获得第二个表的可视化
- 每千个数字得到
- 更新了城市边界 KML 文件的来源？