Question

求：java 文件上传源码（全）

急求java文件上传源码

Answer 1

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import org.apache.commons.fileupload.*;
import org.apache.commons.fileupload.servlet.*;
import org.apache.commons.fileupload.disk.*;public class UploadServlet extends HttpServlet {
private String filePath; //存放上传文件的目录
private String tempFilePath; //存放临时文件的目录 public void init(ServletConfig config)throws ServletException {
super.init(config);
filePath=config.getInitParameter("filePath");
tempFilePath=config.getInitParameter("tempFilePath");
filePath=getServletContext().getRealPath(filePath);
tempFilePath=getServletContext().getRealPath(tempFilePath);
}
public void doPost(HttpServletRequest request,HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/plain");
//向客户端发送响应正文
PrintWriter outNet=response.getWriter();
try{
//创建一个基于硬盘的FileItem工厂
DiskFileItemFactory factory = new DiskFileItemFactory();
//设置向硬盘写数据时所用的缓冲区的大小，此处为4K
factory.setSizeThreshold(4*1024);
//设置临时目录
factory.setRepository(new File(tempFilePath)); //创建一个文件上传处理器
ServletFileUpload upload = new ServletFileUpload(factory);
//设置允许上传的文件的最大尺寸，此处为4M
upload.setSizeMax(4*1024*1024);

List /* FileItem */ items = upload.parseRequest(request); Iterator iter = items.iterator();
while (iter.hasNext()) {
FileItem item = (FileItem) iter.next();
if(item.isFormField()) {
processFormField(item,outNet); //处理普通的表单域
}else{
processUploadedFile(item,outNet); //处理上传文件
}
}
outNet.close();
}catch(Exception e){
throw new ServletException(e);
}
} private void processFormField(FileItem item,PrintWriter outNet){
String name = item.getFieldName();
String value = item.getString();
outNet.println(name+":"+value+"\r\n");
}

private void processUploadedFile(FileItem item,PrintWriter outNet)throws Exception{
String filename=item.getName();
int index=filename.lastIndexOf("\\");
filename=filename.substring(index+1,filename.length());
long fileSize=item.getSize();

if(filename.equals("") && fileSize==0)return; File uploadedFile = new File(filePath+"/"+filename);
item.write(uploadedFile);
outNet.println(filename+" is saved.");
outNet.println("The size of " +filename+" is "+fileSize+"\r\n");
}
}