错误处理集(struts2).doc

struts2 异常处理总结1-:java.lang.NoClassDefFoundError: org/apache/struts2/dojo/views/jsp/ui/HeadTag解决办法：原因缺少了dojo的JAR包，引入即可:struts2-dojo-plugin-2.1.2.jarThe head tag renders required JavaScript code to configure Dojo and is required in order to use any of the tags included in the Dojo plugin.-If you are planning to nest tags from the Dojo plugin, make sure you set parseContent=false, otherwise each request made by the inner tags will be performed twice.2-:Unable to load configuration. -bean -jar:file:/F:/Struts2/Struts2/WebRoot/WEB-INF/lib/struts2-core- 2.1.2.jar!/struts-default.xml:46:178Caused by: Unable to load bean: type:org.apache.struts2.dispatcher.multipart.MultiPartRequest class:org.apache.struts2.dispatcher.multipart.JakartaMultiPartRequest -bean -jar:file:/F:/Struts2/Struts2/WebRoot/WEB-INF/lib/struts2-core-2.1.2.jar!/struts-default.xml:46:178Caused by: java.lang.NoClassDefFoundError: org/apache/commons/fileupload/RequestContext解决办法：缺少JAR包，引入commons-fileupload-1.2.1.jar，commons-io-1.3.2.jar即可3-:No tag datetimepicker defined in tag library imported with prefix s原因版本问题：缺少struts-dojo-plugin JAR包，以及HTML的,中没有使用标签If youre using Struts 2.1.x youre probablymissing thestruts-dojo-plugin. Michals reference below applies to Struts 2.1.xonly. In the lasts versions (since 2.0.9 I guess), all AJAX are in dojo plugin. So you need toinclude and ( Temp1:Temp2:Temp3:Temp4:) and call :4-:使用TILES框架If you use the Tiles 2 plugin, check your tiles.xml file(s) to ensure they contain a DOCTYPE.5-:struts2中不支持EL表达式 Struts2.1 tags do not allow evaluation of JSP EL within their attributes.Instead, Struts2 tags evaluate attribute values as OGNL. Allowing bothexpression languages within the same attribute opens major securityvulnerabilities. 6-文件上传过程中取不到文件名和文件类型，即都取到NULL原因：如果页面中file的name=“a”则我们ACTION中设置String aContentType,String aFileName;(此两个其实无所谓，关键是SET方法)setA(File file)(); setAContentType(String s);setAFileName(String name) 即格式如下：setXContentType() setXFileName().X代表你给FILE取的NAME名字必须和它相同，固定格式7-严重: Unable to parse mons.fileupload.FileUploadBase$SizeLimitExceededException: the request was rejected because its size (8523356) exceeds the configured maximum (2097152)at mons.fileupload.FileUploadBase$FileItemIteratorImpl.(FileUploadBase.java:914)2008-5-27 17:46:51 mons.CommonsLogger warn警告: Could not find property struts.valueStack2008-5-27 17:46:51 mons.CommonsLogger error严重: the request was rejected because its size (8523356) exceeds the configured maximum (2097152)2008-5-27 17:46:51 mons.CommonsLogger warn警告: Could not find property org.apache.catalina.jsp_file原因：上传文件大小超过预定大小，可以在perties配置文件中设置struts.multipart.maxSize=XXX（XXX为文件大小）8-配置了文件类型限制后，当传错误类型可以拦截不让用户上传该文件，可是跳转的页面却没有跳转到input配置的错误页面，而是返回到了success正确页面。严重: Content-Type not allowed: filedata upload_5b01657_11a329d4dcf_8000_00000000.tmp text/plain我的打印输出DEBUG语句内容:File:null FlieName:null type:null即拦截类型成功了java.lang.NullPointerExceptionat java.io.FileInputStream.(FileInputStream.java:103)at com.study.web.util.FileUploadUtil.uploadFile(FileUploadUtil.java:36)at com.study.web.action.UploadFileAction.execute(UploadFileAction.java:58)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)。2008-5-29 10:59:07 mons.CommonsLogger warn警告: Could not find property org.apache.catalina.jsp_file2008-5-29 10:59:07 mons.CommonsLogger warn警告: Could not find property struts2008-5-29 10:59:07 mons.CommonsLogger info信息: Removing file filedata tmpupload_5b01657_11a329d4dcf_8000_00000000.tmp原因及解决办法：在该文件上传Action中只配置了FileUploadInterceptor后缺少配置了defaultStack拦截器.在ACTION中配置玩defaultStack拦截器后改错误消失。9-perties中全局配置文件大小，再使用默认FileUploadInterceptor拦截器时候能实现拦截的功能但是后台出现异常。严重: Unable to parse mons.fileupload.FileUploadBase$SizeLimitExceededException: the request was rejected because its size (380) exceeds the configured maximum (10)at mons.fileupload.FileUploadBase$FileItemIteratorImpl.(FileUploadBase.java:914)原因：未知。将全局配置中的限制大小去掉，再重新在ACTION中覆盖配置FileUploadInterceptor拦截器设置大小和文件类型限制，可消除异常。10-多文件上传中，其中一个传被限制的文件如限制aplication/msword(即.doc)文件，允许传文本文件。然而当夹杂在一起传的时候，后台能截获类型错误不可传信息，但是实际却还是上传成功。严重: Content-Type not allowed: filedata upload_4d958287_11a33e76ab9_8000_00000007.tmp application/mswordfile is :tmpupload_4d958287_11a33e76ab9_8000_00000006.tmp fileName:project.txt fileType:text/plainfile is :tmpupload_4d958287_11a33e76ab9_8000_00000007.tmp fileName:application base.doc fileType:application/mswordfile is :tmpupload_4d958287_11a33e76ab9_8000_00000008.tmp fileName:zhongqi-bug.txt fileType:text/plain原因：忘记了继承ActionSupport类。继承后异常消失。11-文件上传异常，不能创建File文件Cannot create type class java.io.File from value C:Documents and Settingsadmin桌面OrderReporterServiceImp.java - unknown location原因：忘记了在form表单里将enctype设置成文件上传格式：enctype=multipart/form-data12-当使用限制文件类型和大小的时候抛出空指针异常java.lang.NullPointerExceptiondemo.struts2.action.ValidatFileUploadAction.execute(ValidatFileUploadAction.java:71)sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)原因：在ACTION中配置了fileUpload拦截器后忘记了配置默认拦截器：defautlStack。注意当ACTION中配置自己的拦截器后需要显示配置默认拦截器defaultStack13-在国际化时候抛空指针异常：16:31:12,812 ERROR jsp:253 - Servlet.service() for servlet jsp threw exceptionjava.lang.NullPointerException at java.text.MessageFormat.applyPattern(MessageFormat.java:414)at java.text.MessageFormat.(MessageFormat.java:350)at com.opensymphony.xwork2.DefaultTextProvider.getText(DefaultTextProvider.java:70)原因：忘记了在struts.xml中配置国际化常量，或者在perties中配置全局国际化常量 struts.custom.i18n.resources=globeMessage14- struts action的配置文件加载失败：Unable to load configuration. - result - file:/D:/Java/apache-tomcat-5.5.20/webapps/mysts/WEB-INF/classes/test.xml:10:26Caused by: No result type specified for result named error, perhaps the parent package does not specify the result type? - result - file:/D:/Java/apache-tomcat-5.5.20/webapps/mysts/WEB-INF/classes/test.xml:10:26at viders.XmlConfigurationProvider.buildResults(XmlConfigurationProvider.java:609)原因：忘记了继承包struts-default15- struts action 配置文件注意事项：1. 别忘记了继承struts-default默认配置包2.如果配置命名空间，一定要以/开始，例如：namespace=/test3.每个模块struts action配置文件中都可以配置全局result，global-result 经测试不会冲突，STRTUS会智能寻找该Action请求的模块STRUTS ACTION配置包关键字: 警告: no configuration found for the specified action 警告: No configuration found for the specified action: ShowMessage in namespace: . Form action defaulting to action attributes literal value. 解决方法：经过测试发现，是没有正确使用tag的原因，这种情况下，正确的写法应该是， 您是否添加了action这个呢？1-:java.lang.NoClassDefFoundError: org/apache/struts2/dojo/views/jsp/ui/HeadTag解决办法：原因缺少了dojo的JAR包，引入即可:struts2-dojo-plugin-2.1.2.jarThe head tag renders required JavaScript code to configure Dojo and is required in order to use any of the tags included in the Dojo plugin.-If you are planning to nest tags from the Dojo plugin, make sure you set parseContent=false, otherwise each request made by the inner tags will be performed twice.2-:Unable to load configuration. -bean -jar:file:/F:/Struts2/Struts2/WebRoot/WEB-INF/lib/struts2-core- 2.1.2.jar!/struts-default.xml:46:178Caused by: Unable to load bean: type:org.apache.struts2.dispatcher.multipart.MultiPartRequest class:org.apache.struts2.dispatcher.multipart.JakartaMultiPartRequest -bean -jar:file:/F:/Struts2/Struts2/WebRoot/WEB-INF/lib/struts2-core-2.1.2.jar!/struts-default.xml:46:178Caused by: java.lang.NoClassDefFoundError: org/apache/commons/fileupload/RequestContext解决办法：缺少JAR包，引入commons-fileupload-1.2.1.jar，commons-io-1.3.2.jar即可3-:No tag datetimepicker defined in tag library imported with prefix s原因版本问题：缺少struts-dojo-plugin JAR包，以及HTML的,中没有使用标签If youre using Struts 2.1.x youre probablymissing thestruts-dojo-plugin. Michals reference below applies to Struts 2.1.xonly. In the lasts versions (since 2.0.9 I guess), all AJAX are in dojo plugin. So you need toinclude and ( Temp1:Temp2:Temp3:Temp4:) and call :4-:使用TILES框架If you use the Tiles 2 plugin, check your tiles.xml file(s) to ensure they contain a DOCTYPE.5-:struts2中不支持EL表达式 Struts2.1 tags do not allow evaluation of JSP EL within their attributes.Instead, Struts2 tags evaluate attribute values as OGNL. Allowing bothexpression languages within the same attribute opens major securityvulnerabilities. 6-文件上传过程中取不到文件名和文件类型，即都取到NULL原因：如果页面中file的name=“a”则我们ACTION中设置String aContentType,String aFileName;(此两个其实无所谓，关键是SET方法)setA(File file)(); setAContentType(String s);setAFileName(String name) 即格式如下：setXContentType() setXFileName().X代表你给FILE取的NAME名字必须和它相同，固定格式7-严重: Unable to parse mons.fileupload.FileUploadBase$SizeLimitExceededException: the request was rejected because its size (8523356) exceeds the configured maximum (2097152)at mons.fileupload.FileUploadBase$FileItemIteratorImpl.(FileUploadBase.java:914)2008-5-27 17:46:51 mons.CommonsLogger warn警告: Could not find property struts.valueStack2008-5-27 17:46:51 mons.CommonsLogger error严重: the request was rejected because its size (8523356) exceeds the configured maximum (2097152)2008-5-27 17:46:51 mons.CommonsLogger warn警告: Could not find property org.apache.catalina.jsp_file原因：上传文件大小超过预定大小，可以在perties配置文件中设置struts.multipart.maxSize=XXX（XXX为文件大小）8-配置了文件类型限制后，当传错误类型可以拦截不让用户上传该文件，可是跳转的页面却没有跳转到input配置的错误页面，而是返回到了success正确页面。严重: Content-Type not allowed: filedata upload_5b01657_11a329d4dcf_8000_00000000.tmp text/plain我的打印输出DEBUG语句内容:File:null FlieName:null type:null即拦截类型成功了java.lang.NullPointerExceptionat java.io.FileInputStream.(FileInputStream.java:103)at com.study.web.util.FileUploadUtil.uploadFile(FileUploadUtil.java:36)at com.study.web.action.UploadFileAction.execute(UploadFileAction.java:58)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)。2008-5-29 10:59:07 mons.CommonsLogger warn警告: Could not find property org.apache.catalina.jsp_file2008-5-29 10:59:07 mons.CommonsLogger warn警告: Could not find property struts2008-5-29 10:59:07 mons.CommonsLogger info信息: Removing file filedata tmpupload_5b01657_11a329d4dcf_8000_00000000.tmp原因及解决办法：在该文件上传Action中只配置了FileUploadInterceptor后缺少配置了defaultStack拦截器.在ACTION中配置玩defaultStack拦截器后改错误消失。9-perties中全局配置文件大小，再使用默认FileUploadInterceptor拦截器时候能实现拦截的功能但是后台出现异常。严重: Unable to parse mons.fileupload.FileUploadBase$SizeLimitExceededException: the request was rejected because its size (380) exceeds the configured maximum (10)at mons.fileupload.FileUploadBase$FileItemIteratorImpl.(FileUploadBase.java:914)原因：未知。将全局配置中的限制大小去掉，再重新在ACTION中覆盖配置FileUploadInterceptor拦截器设置大小和文件类型限制，可消除异常。10-多文件上传中，其中一个传被限制的文件如限制aplication/msword(即.doc)文件，允许传文本文件。然而当夹杂在一起传的时候，后台能截获类型错误不可传信息，但是实际却还是上传成功。严重: Content-Type not allowed: filedata upload_4d958287_11a33e76ab9_8000_00000007.tmp application/mswordfile is :tmpupload_4d958287_11a33e76ab9_8000_00000006.tmp fileName:project.txt fileType:text/plainfile is :tmpupload_4d958287_11a33e76ab9_8000_00000007.tmp fileName:application base.doc fileType:application/mswordfile is :tmpupload_4d958287_11a33e76ab9_8000_00000008.tmp fileName:zhongqi-bug.txt fileType:text/plain原因：忘记了继承ActionSupport类。继承后异常消失。11-文件上传异常，不能创建File文件Cannot create type class java.io.File from value C:Documents and Settingsadmin桌面OrderReporterServiceImp.java - unknown location原因：忘记了在form表单里将enctype设置成文件上传格式：enctype=multipart/form-data12-当使用限制文件类型和大小的时候抛出空指针异常java.lang.NullPointerExceptiondemo.struts2.action.ValidatFileUploadAction.execute(ValidatFileUploadAction.java:71)sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)原因：在ACTION中配置了fileUpload拦截器后忘记了配置默认拦截器：defautlStack。注意当ACTION中配置自己的拦截器后需要显示配置默认拦截器defaultStack13-在国际化时候抛空指针异常：16:31:12,812