package cn.itcast.servlet;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
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.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
public class UploadServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//使用第三方组件上传文件
/**
* 步骤
* 1、创建一个磁盘文件项的工厂
* 2、创建一个核心解析类ServletFileUpload
* 3、解析request对象，返回一个List<FileItem>
*/
//创建一个磁盘文件项的工厂
DiskFileItemFactory factory=new DiskFileItemFactory();
//创建一个核心解析类ServletFileUpload
ServletFileUpload fileUpload=new ServletFileUpload(factory);
//解析request对象，返回一个List<FileItem>
try {
List<FileItem> list=fileUpload.parseRequest(request);
for(FileItem fileItem:list)
{
if(fileItem.isFormField())
{
//页面中的普通项
String name=fileItem.getFieldName();
//获得普通项的值
String value=fileItem.getString();
System.out.println(name+" "+value);
}
else
{
//文件上传项
//获得文件的名称
String fileName=fileItem.getName();
//获得文件的数据
InputStream is=fileItem.getInputStream();
//向服务器端写文件
//获得上传文件的路径
String path=getServletContext().getRealPath("/upload");
OutputStream os=new FileOutputStream(path+"/"+fileName);
//俩流对接
int len=0;
byte[] b=new byte[1024];
while((len=is.read(b))!=-1)
{
os.write(b, 0, len);
}
is.close();
os.close();
}
}
} catch (FileUploadException e) {
e.printStackTrace();
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP ""upload.jsp"" starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<h1>文件上传</h1>
<form action="${pageContext.request.contextPath }/UploadServlet" method="post" enctype="multipart/form-data">
文件描述:<input type="text" name="desc"/><br/>
文件上传:<input type="file" name="upload"><br/>
<input type="submit" value="上传">
</form>
</body>
</html>
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 20分 |
跟踪代码，应该文件名是全路径D:\PHOTO\XXX.JPG导致的，只要截取最后的xxx.jpg
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10分 |
你的路径封装的明显有问题啊，又是e盘又是d盘的
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10分 |
路径有问题，找不到文件报错
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