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下载 中文名称的文件 struts报错

<a href="download.action?filename=123图片.jpg">文件下载</a>

<action name="download" class="com.pactera.action.FileDownloadAction">
<!-- 				<param name="inputPath">/</param> -->
				<result name="success" type="stream">
					<param name="contentType">application/octet-stream</param>
					<param name="inputName">inputStream</param>
					<param name="contentDisposition">attachment;filename="${downloadFileName}"</param>
					<param name="bufferSize">8192</param>					
				</result>
			</action>

String filename;

public String getDownloadFileName() {

String downloadFileName = "";

try {

downloadFileName = URLEncoder.encode(filename,"UTF-8");

} catch (UnsupportedEncodingException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return downloadFileName;

}

public InputStream getInputStream() throws IOException{

String path = ServletActionContext.getServletContext().getRealPath("/images");

String filePath = path + "\\" + filename;

File file = new File(filePath);

return FileUtils.openInputStream(file);

//return ServletActionContext.getServletContext().getResourceAsStream(inputPath);

}


正在回答

5 回答

你要看他是在获取文件信息是报的错误,应该是在jsp中少了要下载文件的信息http://img1.sycdn.imooc.com//56a9c4ce0001b66f06350219.jpg

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出现

Can not find a java.io.InputStream with the name [inputStream] in the invocation stack. Check the <param name="inputName"> tag specified for this action.

异常时,通常:

1,文件路径不对,根本就没获取到文件,可以将获得的InputStream打印,如果为null,则检查文件路径;

2,在action中没有写配置文件中"<param name="inputName">"后面属性的那个get方法.

3,以上均无问题,那就是使用

return ServletActionContext.getServletContext().getResourceAsStream("...")

获取流的时候,保证文件位置在 ServletContext 当中,就是说要在当前的应用上下文中,如果是从外部引入文件,比如:C:/Users/Administrator/Pictures/360截图20150601210855523.jpg ,要手动建一个流

public InputStream getInputStream(){
		File file = new File(inputPath);
		InputStream is = null;
		try {
			is = new FileInputStream(file);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		}
		return is;
				//ServletActionContext.getServletContext().getResourceAsStream(inputPath);
	}

以上应该能解决你的问题。

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也是这个问题


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Struts Problem Report

Struts has detected an unhandled exception:

Messages:    

Can not find a java.io.InputStream with the name [inputStream] in the invocation stack. Check the

tag specified for this action.

   

File:    org/apache/struts2/dispatcher/StreamResult.java    

Line number:    237    

Stacktraces

java.lang.IllegalArgumentException: Can not find a java.io.InputStream with the name [inputStream] in the invocation stack. Check thetag specified for this action.    

   org.apache.struts2.dispatcher.StreamResult.doExecute(StreamResult.java:237)
   org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:186)
   com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:373)
   com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:277)
   com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:176)
   com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
   com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
   com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:263)
   org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
   com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
   com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
   com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:133)
   com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
   com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207)
   com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
   com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
   com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207)
   com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
   com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
   com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:190)
   com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
   org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)
   com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
   org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94)
   com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
   org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243)
   com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
   com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)
   com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
   com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)
   com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
   org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267)


0 回复 有任何疑惑可以回复我~
#1

风满西楼

设置文件类型的时候可设置编码集,解决报错问题。 <param name="contentType">application/octet-stream;charset=UTF-8</param><!-- 文件类型 ,编码集-->
2015-08-03 回复 有任何疑惑可以回复我~

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下载 中文名称的文件 struts报错

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