JSP—实现文件保存-蒲公英云

JSP—实现文件保存

upload.html

<html>
<head>
<title>请选择上传的图片</title>
</head>
<body>
    <table border="0" align="center" cellpadding="0" cellspacing="0">
        <tr>
            <td height="45" align="center" valign="middle"><form
                    action="uploadimage.jsp" method="post"
                    enctype="multipart/form-data" name="form1">
                    请选择上传的图片 <input type="file" name="file"> <input
                        type="submit" name="Submit" value="上传">
                </form>
            </td>
        </tr>
    </table>
</body>
</html>

uploadimage.jsp

<%@ page contentType="text/html;charset=gb2312" language="java"
    import="java.io.*,java.awt.Image,java.awt.image.*,com.sun.image.codec.jpeg.*,
java.sql.*,com.jspsmart.upload.*,java.util.*"%>
<%
    SmartUpload mySmartUpload = new SmartUpload();
    long file_size_max = 4000000;
    String fileName2 = "", ext = "", testvar = "";
    String url = "uploadfile/images/"; //应保证在根目录中有此目录的存在
    //初始化
    mySmartUpload.initialize(pageContext);
    //只允许上载此类文件
    try {
        mySmartUpload.setAllowedFilesList("jpg,gif");
        //上载文件
        mySmartUpload.upload();
    } catch (Exception e) {
%>
<SCRIPT language=javascript>
    alert("只允许上传.jpg和.gif类型图片文件");
    window.location = 'upfile.jsp';
</script>
<%
    }
    try {
        com.jspsmart.upload.File myFile = mySmartUpload.getFiles()
                .getFile(0);
        if (myFile.isMissing()) {
%>
<SCRIPT language=javascript>
    alert("请先选择要上传的文件");
    window.location = 'upfile.jsp';
</script>
<%
    } else {
            //String myFileName=myFile.getFileName(); //取得上载的文件的文件名
            ext = myFile.getFileExt(); //取得后缀名
            int file_size = myFile.getSize(); //取得文件的大小
            String saveurl = "";
            if (file_size < file_size_max) {
                //更改文件名，取得当前上传时间的毫秒数值
                Calendar calendar = Calendar.getInstance();
                String filename = String.valueOf(calendar
                        .getTimeInMillis());
                saveurl = request.getRealPath("/") + url;
                saveurl += filename + "." + ext; //保存路径
                myFile.saveAs(saveurl, mySmartUpload.SAVE_PHYSICAL);
            } else {
                out.print("<SCRIPT language=''javascript''>");
                out.print("alert(''上传文件大小不能超过" + (file_size_max / 1000)
                        + "K'');");
                out.print("window.location=''upfile.jsp;''");
                out.print("</SCRIPT>");
            }
        } 
    } catch (Exception e) {
        e.toString();
    }
%>