Form表单上传文件（type="file"）的使用

Form表单上传文件（type="file"）的使用

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"%>

<%

String path=request.getContextPath();

request.setAttribute("path", path);

%>

2.过滤器解决中文乱码问题

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");

rtfxfEYesponse.setContentType("text/html charset=utf-8");

arg2.doFilter(request, response);

}

@Override

public void init(FilterConfig arg0) throws ServletException

{

}

}

3.处理html/jsp

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#HttpSertfxfEYvlet()

*/

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");

}

}

总结

以上所述是给大家介绍的Form表单上传域（type="file"）的使用(上传文件)，希望对大家有所帮助，如果大家有任何疑问请给我留言，会及时回复大家的。在此也非常感谢大家对我们网站的支持！

版权声明：本文内容由网络用户投稿，版权归原作者所有，本站不拥有其著作权，亦不承担相应法律责任。如果您发现本站中有涉嫌抄袭或描述失实的内容，请联系我们jiasou666@gmail.com 处理，核实后本网站将在24小时内删除侵权内容。