问答详情
源自：4-5 通过Struts2实现文件下载

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);

}


提问者：Vidor_Chan 2015-04-12 23:11

个回答

  • 贪吃干脆面君
    2016-01-28 15:35:45

    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://img.mukewang.com/56a9c4ce0001b66f06350219.jpg

    0
  • 风满西楼
    2015-08-04 10:38:44

    <a href="download?filename=360截图20150601210855523.jpg">点击下载</a>

    如果你下载文件时从页面获取文件的名称，如果文件名有中文的话，报

    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.

    后台控制台可以看到java.io.FileNotFoundException异常：

    java.io.FileNotFoundException: C:\Users\Administrator\Pictures\360??????20150601210855523.jpg (文件名、目录名或卷标语法不正确。)

    那么你在action中处理文件名称的时候需要对其进行转码，将中文文件名转码成能识别的文件名

    String filePath = path + "\\" + new String(filename.getBytes("ISO-8859-1"),"UTF-8"));

    这样解决了下载中文文件名报错的问题。前面的回答可用在文件固定的下载上，这个可以用在文件名不固定的下载上。

    0
  • 风满西楼
    2015-08-03 23:31:14

    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。

    0
  • Amazingcoder
    2015-05-17 15:59:31

    也是这个问题


    0
  • Vidor_Chan
    2015-04-12 23:12:36

    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