javaweb简单实现文件上传与源代码

javaweb简单实现文件上传与下载源代码，仅供参考

package com.xpy.download;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URLEncoder;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


@SuppressWarnings（“serial“）
public class FileDownLoad extends HttpServlet {

	public void doGet（HttpServletRequest request HttpServletResponse response）
			throws ServletException IOException {
		
		String fileName=request.getParameter（“fileName“）;
		//解决参数乱码
 		fileName=new String（fileName.getBytes（“iso8859-1“）“UTF-8“）;
 		
		fileName=this.getServletContext（）.getRealPath（“/WEB-INF/download/“+fileName）;
// 		System.out.println（fileName+“-------->“+File.separator）;
		/*
		 * 检查文件是否存在、、略
		 */
		//设置响应头，控制浏览器下载该文件
		response.setHeader（“content-disposition“ “attachment;filename=“+URLEncoder.encode（fileName.substring（fileName.lastIndexOf（File.separator）+1）“UTF-8“））;
		
		//文件下载
		FileInputStream inputStream=new FileInputStream（fileName）;
		OutputStream outputStream=response.getOutputStream（）;
		
		byte []buffer=new byte[1024];
		int length=0;
		
		while（（length=inputStream.read（buffer））!=-1）{
			outputStream.write（buffer 0 length）;
		}
		inputStream.close（）;
		outputStream.close（）;
	}

	public void doPost（HttpServletRequest request HttpServletResponse response）
			throws ServletException IOException {

		doGet（request response）;
	}

}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2016-08-25 15:44  FileDownLoad\
     文件        1093  2016-08-25 15:44  FileDownLoad\.classpath
     文件        1337  2016-08-25 16:01  FileDownLoad\.project
     目录           0  2016-08-25 15:44  FileDownLoad\.settings\
     文件         522  2016-08-25 15:44  FileDownLoad\.settings\.jsdtscope
     文件         364  2016-08-25 15:44  FileDownLoad\.settings\org.eclipse.jdt.core.prefs
     文件         495  2016-08-25 15:44  FileDownLoad\.settings\org.eclipse.wst.common.component
     文件         414  2016-08-25 15:44  FileDownLoad\.settings\org.eclipse.wst.common.project.facet.core.xml
     文件          49  2016-08-25 15:44  FileDownLoad\.settings\org.eclipse.wst.jsdt.ui.superType.container
     文件           6  2016-08-25 15:44  FileDownLoad\.settings\org.eclipse.wst.jsdt.ui.superType.name
     目录           0  2016-08-25 15:45  FileDownLoad\src\
     目录           0  2016-08-25 15:45  FileDownLoad\src\com\
     目录           0  2016-08-25 15:48  FileDownLoad\src\com\xpy\
     目录           0  2016-09-18 18:50  FileDownLoad\src\com\xpy\download\
     文件        1659  2016-09-18 19:56  FileDownLoad\src\com\xpy\download\FileDownLoad.java
     文件        1641  2016-09-18 19:16  FileDownLoad\src\com\xpy\download\ListFileServlet.java
     目录           0  2016-08-25 15:48  FileDownLoad\src\com\xpy\upload\
     文件        8671  2016-09-11 09:16  FileDownLoad\src\com\xpy\upload\FileUpLoadServlet.java
     目录           0  2016-09-18 18:59  FileDownLoad\WebRoot\
     文件        1143  2016-09-18 19:13  FileDownLoad\WebRoot\download.jsp
     文件         834  2016-08-25 15:44  FileDownLoad\WebRoot\index.jsp
     文件         196  2016-08-25 18:46  FileDownLoad\WebRoot\message.jsp
     目录           0  2016-08-25 15:44  FileDownLoad\WebRoot\meta-INF\
     文件          39  2016-08-25 15:44  FileDownLoad\WebRoot\meta-INF\MANIFEST.MF
     文件         889  2016-08-25 15:59  FileDownLoad\WebRoot\upload.jsp
     目录           0  2016-09-18 18:53  FileDownLoad\WebRoot\WEB-INF\
     目录           0  2016-09-14 09:02  FileDownLoad\WebRoot\WEB-INF\classes\
     目录           0  2016-09-14 09:02  FileDownLoad\WebRoot\WEB-INF\classes\com\
     目录           0  2016-09-14 09:02  FileDownLoad\WebRoot\WEB-INF\classes\com\xpy\
     目录           0  2016-09-18 18:50  FileDownLoad\WebRoot\WEB-INF\classes\com\xpy\download\
     文件        2409  2016-09-18 19:56  FileDownLoad\WebRoot\WEB-INF\classes\com\xpy\download\FileDownLoad.class
............此处省略12个文件信息