Servlet3.1上传图片示例

一、前端JSP页面

<%@page pageEncoding="UTF-8"%>

Servlet3.1实现文件上传

用户名：
密码：
头像：

 

二、后台逻辑处理的Servlet

package com.qubo.servlet3x;

import java.io.IOException;
import java.util.Date;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

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("/fileUpload1")
@MultipartConfig
public class FileUploadServlet1 extends HttpServlet {
private static final long serialVersionUID = 1L;

protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=utf-8");
String name = request.getParameter("username");
String password = request.getParameter("password");
Part part = request.getPart("photo");
String fileName = part.getSubmittedFileName();//调用获取文件名的方法
String str = part.getName(); //前端jsp页面中指定的name属性的值，即中的photo
System.out.println("用户名：" + name + "，密码：" + password + "，文件名：" + fileName + "，图像输入框名：" + str);
String hzm = fileName.substring(fileName.indexOf("."));//获取文件的后缀名
part.write("E:/ZhuoXun JavaWeb/Servlet3.x/WebContent/img/" + new Date().getTime() + hzm);//文件的保存位置
}

protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}