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859天前import java.io.File; |
import java.io.IOException; |
import java.text.SimpleDateFormat; |
import java.util.Date; |
import java.util.Iterator; |
import java.util.List; |
import javax.servlet.ServletException; |
import javax.servlet.http.HttpServlet; |
import javax.servlet.http.HttpServletRequest; |
import javax.servlet.http.HttpServletResponse; |
import org.apache.commons.fileupload.FileItem; |
import org.apache.commons.fileupload.FileUpload; |
import org.apache.commons.fileupload.disk.DiskFileItemFactory; |
public class UploadServlet extends HttpServlet { |
private final String uploadPath = "C:/file/"; // 用于存放上传文件的目录 |
private final String tempPath = "C:/tempFile"; // 用于存放临时文件的目录 |
private final int flushSize = 1024 * 512; // 缓冲区大小 |
private final long fileSize = 10 * 1024 * 1024; // 文件最大大小 |
public void init() throws ServletException { |
File file = new File (uploadPath); |
if (!file.exists() ) { |
file.mkdir(); |
} |
file = new File (tempPath); |
if (!file.exists() ) { |
file.mkdir(); |
} |
} |
public void doGet (HttpServletRequest request, HttpServletResponse response) |
throws ServletException, IOException { |
// 判断from表单的enctype属性值是否设置为multipart/form-data |
boolean isMultipart = FileUpload.isMultipartContent (request); |
if (!isMultipart) { |
return; |
} |
try { |
DiskFileItemFactory factory = new DiskFileItemFactory(); |
// 设置缓冲区大小 |
factory.setSizeThreshold (flushSize); |
factory.setRepository (new File (tempPath) ); |
// 创建FileUpload对象 |
FileUpload upload = new FileUpload (factory); |
// 设置文件最大大小 |
upload.setSizeMax (fileSize); |
List items = upload.parseRequest (request); |
Iterator iter = items.iterator(); |
while (iter.hasNext() ) { |
FileItem item = (FileItem) iter.next(); |
// 判断是否是file表单元素 |
if (!item.isFormField() ) { |
String name = item.getName();//获得文件路径及名称 |
name = name.substring (name.lastIndexOf (File.separator) + 1, |
name.length() ); //获得文件名 |
String fileType = name.substring (name.indexOf (".") ); //获得文件后缀名 |
String filename = getFileName();//随机产生一个文件名防止文件名重复 |
long size = item.getSize(); |
//如果文件名不存在 则不处理 |
if ( (name == null || name.equals ("") ) && size == 0) { |
continue; |
} |
item.write (new File (uploadPath + filename + fileType) ); |
} else { |
//获得文件描述 |
String desc = item.getString ("UTF-8"); |
System.out.println (desc); |
} |
} |
response.sendRedirect ("upload.jsp?code=001"); |
} catch (Exception e) { |
e.printStackTrace(); |
response.sendRedirect ("upload.jsp?code=002"); |
} |
} |
private String getFileName() { |
//根据时间产生文件名 |
SimpleDateFormat df = new SimpleDateFormat ("yyyyMMddhhmmssms"); |
return df.format (new Date() ); |
} |
public void doPost (HttpServletRequest request, HttpServletResponse response) |
throws ServletException, IOException { |
doGet (request, response); |
} |
} |
/****************************************/ |
<%@ page language="java" pageEncoding="UTF-8"%> |
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> |
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> |
<html> |
<head> |
<title>文件上传</title> |
</head> |
<body> |
<c:if test="${param.code eq '001'}"> |
<div style="color:red">上传成功！</div> |
</c:if> |
<c:if test="${param.code eq '002'}"> |
<div style="color:red">上传失败！</div> |
</c:if> |
<form action="uploadServlet" method="post" enctype="multipart/form-data"> |
照片描述：<input type="text" name="desc"/><br/> |
<input type="file" name="file1"/><br/> |
<input type="submit" value="提交"/> |
</form> |
</body> |
</html> |
