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"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<%
String ContextPath();
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
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
{
}
}
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,inputtypefile不上传文件
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(!ists()&& !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= Part("fileN");
String ContentType();
String Header("content-disposition");
//String Name();
long Size();
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);
}
}
总结
以上所述是⼩编给⼤家介绍的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，⼩编会及时回复⼤家的。在此也⾮常感谢⼤家对⽹站的⽀持！

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