form表单上传域(type=;file;)的使用----上传文件

html head meta http-equiv="Content-Type" content="text/html; charset=UTF-8" titleInsert 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

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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

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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

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


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