upload.java

JAVA版的文件上传源代码

import java.io.*;
import java.util.Iterator;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.*;

import org.apache.commons.fileupload.*;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.disk.*;

public final class Upload extends HttpServlet {

	private final String SaveDirectory = new String("C:\\upload\\");
	
	private final String TempDirectory = new String("C:\\temp\\");

	private final int MaxMemorySize = 1048576;

	private final int MaxRequestSize = 5242880;
	
	private static final String CONTENT_TYPE = "text/html; charset=GBK";

	public Upload() {
		super();
	}

	private void existDirectory() {
		if (!new File(SaveDirectory).isDirectory())
			new File(SaveDirectory).mkdirs();
		if (!new File(TempDirectory).isDirectory())
			new File(TempDirectory).mkdirs();
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws IOException, ServletException {
		try {
			request.setCharacterEncoding("GBK");
			existDirectory();
			boolean isMultipart = ServletFileUpload.isMultipartContent(request);
			if (isMultipart) {
				DiskFileItemFactory factory = new DiskFileItemFactory();
				factory.setSizeThreshold(MaxMemorySize);
				factory.setRepository(new File(TempDirectory));
				ServletFileUpload upload = new ServletFileUpload(factory);
				upload.setSizeMax(MaxRequestSize);
				ProgressListener progressListener = new ProgressListener() {
					private long megaBytes = -1;

					public void update(long pBytesRead, long pContentLength,
							int pItems) {
						long mBytes = pBytesRead / 1000000;
						if (megaBytes == mBytes) {
							return;
						}
						megaBytes = mBytes;
						if (pContentLength == -1) {
							System.out.println("到目前, " + pBytesRead
									+ " 字节的数据已经上传.");
						} else {
							System.out
									.println("到目前, " + pBytesRead + " ／ "
											+ pContentLength
											+ " 字节数据已经上传.");
						}
					}
				};
				upload.setProgressListener(progressListener);
				List items = upload.parseRequest(request);
				Iterator iter = items.iterator();
				while (iter.hasNext()) {
					FileItem item = (FileItem) iter.next();
					if (item.isFormField()) {
						String name = item.getFieldName();
						String value = item.getString();
						System.out.println("表单域名： " + name+"\t"
								+ "表单值： " + value );
					} else {
						String fieldName = item.getFieldName();
						String fileName = item.getName();
						String contentType = item.getContentType();
						boolean isInMemory = item.isInMemory();
						long sizeInBytes = item.getSize();
						System.out.println("文件域名： " + fieldName+"\t"
								+ " 文件路径： " + fileName +"\t"+ " 上传类型："
								+contentType+"\t"+"内存状态："+isInMemory+"\t"
								+"文件大小(字节)"+sizeInBytes);
						File uploadedFile = new File(fileName);
						item.write(uploadedFile);

					}
				}
				response.setContentType(CONTENT_TYPE);
				PrintWriter out = response.getWriter();
				out.print("<script languaga=\"JavaScript\">alert(\"文件上传成功！\");window.location = \"index.html\";</script>");
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}