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form表单上传域(type="file")的使用----上传文件

时间:2017-08-02 19:57:34      阅读:438      评论:0      收藏:0      [点我收藏+]

标签:action   out   except   iter   bst   long   成功   max   attr   

 

一,单个文件的上传

1.html/jsp页面

<%@ 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}/FileSer"  method="post" enctype="multipart/form-data">
    <table>
        <tr>
            <td>上传文件</td>
            <td> 
                <input type="file" name="fileN" />
            </td>
        </tr>
        <tr>
            <td colspan="2">
                <input type="submit" />
                <input type="reset" />
            </td>
        </tr>
    </table>
    </form>
</body>
</html>

2.过滤器解决中文乱码问题

技术分享
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");
        
        arg2.doFilter(request, response);
    }

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

    }

}
Filter01.java

3.处理html/jsp

技术分享
package com.ser;

import java.io.File;
import java.io.IOException;

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;

/**
 * Servlet implementation class FileSer
 */
@WebServlet("/FileSer")
@MultipartConfig(location="e://uploadFile",
        fileSizeThreshold=1024*1024*1000,
        maxFileSize=1024*1024*1000,
        maxRequestSize=1024*1024*1024
        )
public class FileSer extends HttpServlet {
    private static final long serialVersionUID = 1L;
     
    private static final String location="e://uploadFile";
    /**
     * @see HttpServlet#HttpServlet()
     */
    public FileSer() {
    
    }

    @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 {
        Part part= request.getPart("fileN");
        String fileType=part.getContentType();
        String fileHeader=part.getHeader("content-disposition");
        //String fileName=part.getName();
        long size=part.getSize();
        
        System.out.println(part);
        System.out.println(fileType);
        System.out.println(fileHeader);
        //System.out.println(fileName);
        System.out.println(size);
        String filename=fileHeader.substring(fileHeader.indexOf("filename=")+10, fileHeader.lastIndexOf("\""));
        part.write(filename);        
        response.getWriter().print(filename+"上传成功");
    }

}
FileSer.java

 

form表单上传域(type="file")的使用----上传文件

标签:action   out   except   iter   bst   long   成功   max   attr   

原文地址:http://www.cnblogs.com/waarp/p/7275487.html

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