利用FileUpload上传文件时,不管文件多大,都会溢出?
利用apache的FileUpload组件上传文件的时候,刚开始的时候,还没有问题,一些小附件能上传,可是当测试了一个大附件之后,就报了
内存溢出,再上传小附件,也上传不了,还是报内存溢出?为何?
以下是我处理的代码:
DiskFileUpload fileUpload = new DiskFileUpload();
//设置允许用户上传文件大小,单位:字节
fileUpload.setSizeMax(500*1024*1024);
//设置最多允许在内存中存储的数据,单位:字节
fileUpload.setSizeThreshold(100*1024*1024);
//设置一旦文件大小超过getSizeThreshold()的值时数据存放在硬盘的目录
//在进行文件上传的时候文件先存再内存中,然后才会存到server上,
// 但是如果内存放不下那么大的文件
//就必须用硬盘上的 一个临时文件夹来保存这个文件的部分,然后转存
//现在默认的文件存储的路径是
String tempPath = System.getProperty( "user.dir ");
tempPath = tempPath.replace( '\\ ', '/ ');
String temp = tempPath.substring(0, tempPath.length-3) + "webapps/BJRoadMIS/temp ";
fileUpload.setRepositoryPath(temp);
//获取传入的表单中的参数值
try {
fileItems = fileUpload.parseRequest(request);
Iterator iterator = fileItems.iterator();
while(iterator.hasNext()){
FileItem fileItem = (FileItem)iterator.next();
if (fileItem.isFormField()){
value = value+segment+fileItem.getString();
}
};
try {
value = new String(value.getBytes( "ISO-8859-1 "), "gbk ");
} catch (Unsupported
EncodingException e1) {
e1.printStackTrace();
}
String[] s = value.split(segment);
if(s.length> 1){
uploadPath = tempPath+ "/webapps/BJRoadMIS/upload/ ";
try {
iterator = fileItems.iterator();
while(iterator.hasNext()) {
FileItem fileItem = (FileItem)iterator.next();
//文件域的表单信息
if (!fileItem.isFormField()) {
String strName = fileItem.getName();
uploadFileName = strName.substring(strName.lastIndexOf( "\\ ")+1, strName.length());
long size = fileItem.getSize();
if((strName==null||strName.equals( " ")) && size==0)
continue;
pp=uploadFileName.substring(uploadFileName.lastIndexOf( ". "),uploadFileName.length());
File savedFile = new File(uploadPath +datelog+pp );
fileItem.write(savedFile);
request.setAttribute( "msg ", "save file successful! ");
}
}
if(request.getAttribute( "msg ")== null){
request.setAttribute( "msg ", "save file failed! ");
}
} catc