jsp实现文件上传

• 一、案例演示
• 二、完成步骤
• • 1.通过jsp内置java代码实现文件上传
  • • 1.1 文件上传代码
    • 1.2 处理上传代码
    • 1.3 服务器根目录创建upload文件
  • 2. 通过servlet实现处理上传
  • • 2.1 servlet代码
    • 2.2 配置xml(新版可不用配置)

事先准备jsmartcom_zh_CN.jar文件，用于文件上传准备，放到lib文件夹下

选择图片1.png，点击上传，保存到根目录upload下

文件上传的html页面

//文件名upload.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    


    

        上传的图片：

                  
    

上传的文件进行保存

//文件名do_upload.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    


<%
    SmartUpload smart=new SmartUpload();
    smart.initialize(pageContext);//初始化上传
    smart.upload();//上传准备
    smart.save("upload");//将文件保存到服务器根目录下，相应目录下
%>

通过application.getRealPath()获取真实路径，在真实路径下建upload文件夹

<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    


<%
    String url=application.getRealPath("/");
    System.out.println(url);
%>

//创建UploadServlet
package servlet;

import com.jspsmart.upload.SmartUpload;
import com.jspsmart.upload.SmartUploadException;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.IOException;

@WebServlet(name = "UploadServlet", value = "/UploadServlet")
public class UploadServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request,response);
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("text/html;charset=utf-8");
        SmartUpload smart =new SmartUpload();
        smart.initialize(this.getServletConfig(),request,response);//初始化上传
        try {
            smart.upload(); //准备上传
            smart.save("upload");//保存文件夹
        } catch (SmartUploadException e) {
            e.printStackTrace();
        }
    }
}

    UploadServlet
    servlet.UploadServlet



    UploadServlet
    /upload

修改upload.jsp form表单action路径访问到servlet即可