struts2中的验证码无法显示

Question

在struts2项目中用servlet写的验证码无法显示：
There is no Action mapped for namespace / and action name authImg. - [unknown location]
at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:177)
at org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:61)
at org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:39)
at com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:47)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:458)
at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:395)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
这是控制台显示的相关信息！
但是取出掉了struts2的filter后验证码又能正常显示了！
验证码是用servlet写成的！
请问这是怎么回事啊！？

Answer 1

已经用了struts2了，为什么还用servlet。
struts2把servlet做了封装，他是可以不依赖于容器
而且在struts2中有validate方法验证和xml配置验证的支持。
楼主上边的报的这个错误是找不到Action，你可以看一下是不是
提交的路径错误或是struts.xml配置有错误。

Answer 2

我怀疑是你的Servlet命名和web.xml中为struts配置的
filtermapping冲突，导致该Servlet名被stuts拿去作为Action解析了，因此报找不到的错误。通常，struts的filterMapping为：*.action

Answer 3

你的验证码是通过authImg这个servlet实现的吧，估计是这个url匹配了struts的url-pattern被struts拦截了

Answer 4

at com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:47) 
错在这，找不到action，应没有配置好，看看struts.xml

Answer 5

这个servlet是图形验证码啊！貌似这个只有用servlet或者jsp实现吧！

Answer 6

web.xml配置文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
         <servlet>
<servlet-name>AuthImg</servlet-name>
<servlet-class>com.blareck.web.AuthImg</servlet-class>
</servlet> <servlet-mapping>
<servlet-name>AuthImg</servlet-name>
<url-pattern>/authImg</url-pattern>
</servlet-mapping> <filter>
<filter-name>Struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter>
<filter-mapping>
<filter-name>Struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
struts.xml配置文件<?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>
<include file="struts-default.xml" />
</struts>
index.jsp
<img src="authImg">
====================================================
各位帮忙看下 那里出错了啊！？感觉没出错啊！

Answer 7

struts2的过滤器和你自定义的路径冲突了．．你可以把你的映射的名字加个后缀什么的就行了．比如这样 
<url-pattern>/authImg.jpg </url-pattern> 

Answer 8

我照这佯作了以后还是出现：
警告: Could not find action or result
There is no Action mapped for namespace / and action name authImg. - [unknown location]
at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:177)
at org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:61)
at org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:39)
at com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:47)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:458)
at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:395)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
================================================
这到底要怎么改采没问题啊！？郁闷得很，莫非struts.xml文件要配置！我看李刚的那本ssh2的书里面的工作流系统里面的验证码也没出现过这种问题啊！

Answer 9

<filter-mapping>
<filter-name>Struts2 </filter-name>
<url-pattern>*.action </url-pattern>
</filter-mapping> 或者直接拿struts2的action来写验证码

Answer 10

再问句啊!我看了李刚的那本SSH2的书后面哪个工作流的列子!里面的验证码的url-pattern配置为/web-inf/jsp/authImg.jsp后为什么能正常用呢!?其他的配置都一样啊!

Answer 11

匹配的优先级的问题
1. 先匹配完全映射的 URL
2. 再次匹配路径映射的 URL, 并且最长的路径的匹配优先
3. 再次匹配扩展名映射
4. 最后使用默认的 Servlet

Answer 12

End event threw exception
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.tomcat.util.IntrospectionUtils.callMethod1(IntrospectionUtils.java:899)
at org.apache.tomcat.util.digester.SetNextRule.end(SetNextRule.java:193)
at org.apache.tomcat.util.digester.Rule.end(Rule.java:229)
at org.apache.tomcat.util.digester.Digester.endElement(Digester.java:1058)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(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 org.apache.tomcat.util.digester.Digester.parse(Digester.java:1562)
at org.apache.catalina.startup.ContextConfig.applicationWebConfig(ContextConfig.java:369)
at org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:1062)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:261)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4236)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:920)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:883)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1138)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:566)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Caused by: java.lang.IllegalArgumentException: Invalid <url-pattern> /*.action in filter mapping
at org.apache.catalina.core.StandardContext.addFilterMap(StandardContext.java:2169)
... 44 more
2009-5-11 17:35:10 org.apache.catalina.startup.ContextConfig applicationWebConfig
严重: Parse error in application web.xml file at jndi:/localhost/test/WEB-INF/web.xml
java.lang.IllegalArgumentException: Invalid <url-pattern> /*.action in filter mapping
at org.apache.tomcat.util.digester.Digester.createSAXException(Digester.java:2726)
at org.apache.tomcat.util.digester.Digester.createSAXException(Digester.java:2752)
at org.apache.tomcat.util.digester.Digester.endElement(Digester.java:1061)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(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 org.apache.tomcat.util.digester.Digester.parse(Digester.java:1562)
at org.apache.catalina.startup.ContextConfig.applicationWebConfig(ContextConfig.java:369)
at org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:1062)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:261)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4236)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:920)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:883)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1138)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:566)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
================================================
用了
<filter-mapping>
<filter-name>Struts2 </filter-name>
<url-pattern>*.action </url-pattern>
</filter-mapping> 
结果项目都没法打开了！

Answer 13

public class ValidateCodeAction extends ActionSupport
{
    private ByteArrayInputStream inputStream;
    private int width;
    private int height;
    private int fontSize;
    private int codeLength;    public ValidateCodeAction()
    {
    }    public void setCodeLength(int codeLength)
    {
        this.codeLength = codeLength;
    }    public void setFontSize(int fontSize)
    {
        this.fontSize = fontSize;
    }    public void setHeight(int height)
    {
        this.height = height;
    }    public void setWidth(int width)
    {
        this.width = width;
    }    public ByteArrayInputStream getInputStream()
    {
        return inputStream;
    }    public void setInputStream(ByteArrayInputStream inputStream)
    {
        this.inputStream = inputStream;
    }    public String execute()
        throws Exception
    {
        BufferedImage bimage = new BufferedImage(width, height, 1);
        Graphics g = bimage.getGraphics();
        Random random = new Random();
        g.setColor(getRandomColor(random, 200, 255));
        g.fillRect(0, 0, width, height);
        g.setFont(new Font("Times New Roman", 0, fontSize));
        g.setColor(getRandomColor(random, 160, 200));
        for(int i = 0; i < 155; i++)
        {
            int x = random.nextInt(width);
            int y = random.nextInt(height);
            int xl = random.nextInt(12);
            int yl = random.nextInt(12);
            g.drawLine(x, y, x + xl, y + yl);
        }        StringBuffer str = new StringBuffer();
        for(int i = 0; i < codeLength; i++)
        {
            String randomStr = String.valueOf(random.nextInt(10));
            str.append(randomStr);
            g.setColor(new Color(20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));
            int x = (width / codeLength - 1) * i + random.nextInt(width / (codeLength * 2));
            int y = random.nextInt(height - fontSize) + fontSize;
            g.drawString(randomStr, x, y);
        }        ActionContext.getContext().getSession().put("validateCode", str.toString());
        g.dispose();
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        ImageOutputStream iout = ImageIO.createImageOutputStream(output);
        ImageIO.write(bimage, "JPEG", iout);
        iout.close();
        output.close();
        ByteArrayInputStream in = new ByteArrayInputStream(output.toByteArray());
        setInputStream(in);
        return "success";
    }    private Color getRandomColor(Random random, int fc, int bc)
    {
        if(fc > 255)
            fc = 255;
        if(bc > 255)
            bc = 255;
        int r = fc + random.nextInt(bc - fc);
        int g = fc + random.nextInt(bc - fc);
        int b = fc + random.nextInt(bc - fc);
        return new Color(r, g, b);
    }}[/code] <action name="validate" class="validateCode">
<param name="width">80</param>
<param name="height">20</param>
<param name="fontSize">18</param>
<param name="codeLength">4</param>
<result type="stream">
<param name="contentType">image/jpeg</param>
<param name="inputName">inputStream</param>
</result>
</action>

Answer 14

楼上的方法没试过！
现在搞定了：<url-pattern>/authImg.jsp</url-pattern>   <img src="authImg.jsp">可以 但是authImg.jpg等其他方法好像没用！
谢谢各位了！