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"%>Insert title here <% 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");
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;
@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";
public FileSer() {
}
@Override
public void init(ServletConfig config) throws ServletException
{
File file =new File("e://uploadFile");
if(!file.exists()&& !file.isDirectory())
{
file.mkdir();
}
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
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考高分网网站的支持！
