form表单多文件上传

时间:2022-11-22 12:49:44

1.html/jsp主页

form表单多文件上传form表单多文件上传
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding
="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<%
String path=request.getContextPath();
request.setAttribute(
"path", path);
%>
</head>
<body>
<form action="${path}/MultiUp" method="post" enctype="multipart/form-data">
<table>
<tr>
<td>上传文件</td>
<td>
<input type="file" name="fileN1" />
</td>
</tr>
<tr>
<td>上传文件</td>
<td>
<input type="file" name="fileN2" />
</td>
</tr>
<tr>
<td>上传文件</td>
<td>
<input type="file" name="fileN3" />
</td>
</tr>
<tr>
<td colspan="2">
<input type="submit" />
<input type="reset" />
</td>
</tr>
</table>
</form>
</body>
</html>
duoUp.jsp


2.过滤器解决编码问题

form表单多文件上传form表单多文件上传
package com.ser;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Filter01 implements Filter
{

@Override
public void destroy()
{

}

@Override
public void doFilter(ServletRequest arg0, ServletResponse arg1,
FilterChain arg2)
throws IOException, ServletException
{
HttpServletRequest request
= (HttpServletRequest)arg0;
HttpServletResponse response
=(HttpServletResponse)arg1;
request.setCharacterEncoding(
"utf-8");
response.setCharacterEncoding(
"utf-8");
response.setContentType(
"text/html charset=utf-8");

//System.out.println(">>>>>>>>>>>>");
arg2.doFilter(request, response);
}

@Override
public void init(FilterConfig arg0) throws ServletException
{

}

}
Filter01.java


3.多文件上传服务器处理

form表单多文件上传form表单多文件上传
package multiup;

import java.io.File;
import java.io.IOException;
import java.util.Collection;
import java.util.Collections;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;

import org.apache.commons.collections.CollectionUtils;

/**
* Servlet implementation class MultiUp
*/
@WebServlet(
"/MultiUp")
@MultipartConfig(location
="e://uploadFile",
fileSizeThreshold
=1024*1024*10,
maxFileSize
=1024*1024*200,
maxRequestSize
=1024*1024*300
)
public class MultiUp extends HttpServlet {
private static final long serialVersionUID = 1L;

/**
*
@see HttpServlet#HttpServlet()
*/
public MultiUp() {
}



@Override
public void init(ServletConfig config) throws ServletException
{
File file
= new File("e://uploadFile");
if(!file.exists()&&!file.isDirectory())
{
file.mkdir();
}

}

/**
*
@see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}

/**
*
@see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

Collection
<Part> parts= request.getParts();
StringBuffer sb
=new StringBuffer();

if(!CollectionUtils.isEmpty(parts))
{
for(Part part:parts)
{
String header
=part.getHeader("content-disposition");
String filename
= header.substring(header.indexOf("filename")+10,header.lastIndexOf("\""));
part.write(filename);
sb
=sb.append(filename).append(",");
}
}

String str
=sb.toString().substring(0,sb.toString().length()-1);
response.getWriter().print(str
+"上传成功!");
}

}
MultiUp.java