public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
boolean isMultipart=ServletFileUpload.isMultipartContent(request);
if(isMultipart){
//PrintWriter out=response.getWriter();
//out.println("********");
FileItemFactory factory=new DiskFileItemFactory();
ServletFileUpload upload=new ServletFileUpload(factory);
Iterator items;
//out.println("********");
try{
//try {
items=upload.parseRequest(request).iterator();
//out.println("********");
//} catch (FileUploadException e) {
// TODO Auto-generated catch block
//e.printStackTrace();
//out.println("********");
//}
//out.println("********");
while(items.hasNext()){
FileItem item=(FileItem)items.next();
if(!item.isFormField()){
//out.println("********");
String name=item.getName();
// out.println("上传的文件为："+name+"<br>");
//out.println("********");
String fileName2=name.substring(name.lastIndexOf('\\')+1,name.length());
//out.println("********");
String path=request.getRealPath("file")+File.separatorChar+fileName2;
//out.println("********");
File uploadedFile=new File(path);
//out.println("********");
//try {
item.write(uploadedFile);
//out.println("********");
//} catch (Exception e) {
//out.println("********");
//e.printStackTrace();
//}
//out.println("********");
response.setContentType("text/html");
response.setCharacterEncoding("gb2312");
PrintWriter out=response.getWriter();
//out.println("********");
//out.println("保存的地址"+path);
out.print("上传的文件为："+name+"<br>");
out.print("保存的地址"+path);
}
}
}catch(Exception e){
e.printStackTrace();
//out.println("********");
}
}
这段代码在执行item.write(uploadedFile)时会有异常，整个程序的执行结果是一个空白页，真不知道为什么。
------解决方案--------------------
给你贴一个我写的
- Java code
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { DiskFileItemFactory factory = new DiskFileItemFactory(); ServletFileUpload upload = new ServletFileUpload(factory); upload.setHeaderEncoding("utf-8"); if(!upload.isMultipartContent(request)){ return; } List<FileItem> list = upload.parseRequest(request); for(FileItem item:list){ if(item.isFormField()){ String name = item.getFieldName(); String value = item.getString("utf-8"); System.out.println(name+"="+value); } else{ InputStream in = item.getInputStream(); String realPath = getServletContext().getRealPath("/WEB-INF/upload"); String name = item.getName(); String realName = name.substring(name.lastIndexOf('\\')+1); OutputStream out = new FileOutputStream(realPath+"\\"+realName ); int len=-1; byte[] by = new byte[1024]; while((len=in.read(by))!=-1){ out.write(by,0,len); } out.close(); in.close(); } } } catch (FileUploadException e) { e.printStackTrace(); } }