JSP实现图片上传

时间：2022-06-10 22:06:36
upfile.jsp 文件代码如下: 
  <form method="post" action="uploadimage.jsp" name="form1" enctype="multipart/form-data">

  <input type="file" name="file">

  <input type="submit" name="sub" value="upload">

   </form>
uploadimage.jsp 文件代码如下：
<%@ page language="java"  pageEncoding="gb2312"%>

<%@ page import="java.io.*,java.awt.Image,java.awt.image.*,com.sun.image.codec.jpeg.*,java.sql.*,com.jspsmart.upload.*,java.util.*"%>

<%@ page import="mainClass.*" %>



<html>

  <head>

    <title>My JSP 'uploadimage.jsp' starting page</title>

  </head>



  <body>

    <%

    SmartUpload sma=new SmartUpload();



    long file_max_size=4000000;



    String filename1="",ext="",testvar="";



    String url="uploadfiles/";



    sma.initialize(pageContext);



    try

    {

    sma.setAllowedFilesList("jpg,gif");



    sma.upload();



    }catch(Exception e){

    %>

    <script language="jscript">

    alert("只允许上传jpg,gif图片")

    window.location.href="upfile.jsp"

    </script>

    <%

    }

    try{

    com.jspsmart.upload.File myf=sma.getFiles().getFile(0);



    if(myf.isMissing()){



    %>

    <script language="jscript">

    alert("请选择要上传的文件!")

    window.location.href="upfile.jsp"

    </script>

    <%

    }else{



    ext=myf.getFileExt();



    int file_size=myf.getSize();



    String saveurl="";



    if(file_size < file_max_size){



    Calendar cal=Calendar.getInstance();



    String filename=String.valueOf(cal.getTimeInMillis());



    saveurl=request.getRealPath("/")+url;



    saveurl+=filename+"."+ext;



    myf.saveAs(saveurl,sma.SAVE_PHYSICAL);



    myclass mc=new myclass(request.getRealPath("data/data.mdb"));



    mc.executeInsert("insert into [path] values('uploadfiles/"+filename+"."+ext+"')");



    out.println("图片上传成功!");



    response.sendRedirect("showimg.jsp");

    }



    }



    }catch(Exception e){

    e.printStackTrace();

    }

    %>

  </body>

</html>




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