struts关于文件上传下载

下载：

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public class FunctionAct extends BaseAction implements ServletContextAware {private String filename;private String mimeType;private java.io.InputStream inStream;private ServletContext context;public String function_down() throws Exception {mimeType = context.getMimeType(filename);return "down";}public InputStream getInStream() {inStream = context.getResourceAsStream("/upload/" + filename);if (inStream == null) {inStream = new ByteArrayInputStream("Sorry,File not found !".getBytes());}return inStream;}public String getMimeType() {return mimeType;}public void setFilename(String filename) {try {this.filename = new String(filename.getBytes("ISO8859-1"), "GBK");} catch (UnsupportedEncodingException e) {}}public String getFilename() {try {return new String(filename.getBytes(), "ISO8859-1");} catch (UnsupportedEncodingException e) {return this.filename;}}public void setServletContext(ServletContext context) {this.context = context;}

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<result type="stream" name="down"><param name="contentType">${mimeType}</param><param name="inputName">inStream</param><param name="contentDisposition">attachment;filename="${filename}"</param></result>

http://localhost:8080/bs0514/admin/function/function_down.do?filename=ms.txt

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上传：

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1.设置 enctype="multipart/form-data"

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<form action="<%=path%>/strutsUpload.do" method="post" enctype="multipart/form-data"><input type="file" name="uploadImage" ><input type="submit" value="submit"/></form>

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2.在action中添加属性，注意红色字体

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private java.io.File uploadImage ;

private java.lang.String uploadImageContentType;

private java.lang.String uploadImageFileName ;?

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String realPath = ServletActionContext.getServletContext().getRealPath("/upload");java.io.File file = new java.io.File(realPath);if(!file.exists())file.mkdirs();FileUtils.copyFile(uploadImage, new java.io.File(file,uploadImageFileName)) ;

?当然这里路径需要再改成自己的路径。

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如果文件有限制，则可加上限制文件大小

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<constant name="struts.multipart.maxSize" value="10701096"></constant>

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多文件上传也一样

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<input type="file" name="uploadImage" ><input type="file" name="uploadImage" >

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String realPath = ServletActionContext.getServletContext().getRealPath("/upload");java.io.File file = new java.io.File(realPath);if(!file.exists())file.mkdirs();//FileUtils.copyFile(uploadImage, new java.io.File(file,uploadImageFileName)) ;for(int i = 0 ;i<uploadImages.length;i++){java.io.File uploadImage = uploadImages[i];FileUtils.copyFile(uploadImage, new java.io.File(file,uploadImageFileNames[i])) ;}