Question

求jspsmartupload实现上传功能的简洁思路

Answer 1

<%
SmartUpload mySmartUpload =new SmartUpload();
String deviceId =Sequence.getInstance().getSeqNumber("deviceInf");

// 初始化
final String upFileType="jpg|JPG|GIF|gif|bmp|BMP"; //上传文件类型
final int MAXFILESIZE=100000; //上传文件大小限制
String errMsg=null; //错误信息
boolean err=false; //错误标志
int fileSize=0; //文件大小
String url="images/"; //应保证在根目录中有此目录的存在
String fileName = "";
String fileType ="";
String normalPicName = deviceId+"n";
String alarmPicName = deviceId+"a";
mySmartUpload.initialize(pageContext);

// 上传文件
mySmartUpload.upload();

//判断将要上传文件的总容量是否超过上限
int count = mySmartUpload.getSize();
if(count>MAXFILESIZE){
out.print ("<script>alert('上传失败！文件大小:"+count/1024+"K超出了限定的范围(最大"+ MAXFILESIZE/1024+"K)');this.history.go(-1);</script>");
//response.sendRedirect("http://127.0.0.1:8080/javastudy/upload.htm");
}

// 循环取得上传所有文件
else{
for(int i=0;i<mySmartUpload.getFiles().getCount();i++){
com.jspsmart.upload.File myFile = mySmartUpload.getFiles().getFile(i);

if (!myFile.isMissing()) {
String myFileName=myFile.getFileName();//得到文件名
//out.println(myFileName);
//if(myFileName.length()>0){ //取得不带后缀的文件名
//String subFileName=myFileName.substring(0,myFileName.lastIndexOf('.'));
//}
fileType=myFile.getFileExt();//得到文件扩展名
fileType=fileType.toLowerCase(); //将扩展名转换成小写
if (upFileType.indexOf(fileType)==-1){
err=true;
errMsg="文件"+myFileName+"上传失败！只允许上传以下格式的文件："+upFileType;
}
//得到单个文件大小
//fileSize+=myFile.getSize();
//if (err==false&&fileSize>MAXFILESIZE){
// err=true;
// errMsg="上传失败！文件大小超出了限定的范围(最大"+MAXFILESIZE/1024+"K)";
//}

if(err==false){
//取得路径
//String adss=getServletContext().getRealPath("/")+"JSP\\";
//String trace=adss+myFileName;
//保存文件
//String newFileName="001."+fileType; //可自动生成文件名以防止同名覆盖
//myFile.saveAs(trace);
//myFile.saveAs("enterprise/images/"+myFileName);
Calendar calendar = Calendar.getInstance();
fileName = String.valueOf(calendar.getTimeInMillis());
if(i<=0){
normalPicName=normalPicName+"."+fileType;
String saveurl=request.getRealPath("/")+url;
saveurl+=normalPicName; //保存路径
myFile.saveAs(saveurl,mySmartUpload.SAVE_PHYSICAL);
}
else{
alarmPicName=alarmPicName+"."+fileType;
String saveurl=request.getRealPath("/")+url;
saveurl+=alarmPicName; //保存路径
myFile.saveAs(saveurl,mySmartUpload.SAVE_PHYSICAL);
}
}else{
out.print ("<script>alert('"+errMsg+"');this.history.go(-1);</script>");
}
}
}
String deviceName = mySmartUpload.getRequest().getParameter("deviceName");

%>