form表单多文件上传

1.html/jsp主页

<%@ 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

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

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

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form表单多文件上传

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