大数据量文件的上传下载技巧

byte[] content = null;
Blob blob = null;
while(rs.next()){
blob = rs.getBlob("f006b0042");
content = blob.getBytes(1, (int) blob.lengh();
blob.free();
if(null != content){
writerFile(fileObj,content,obTextId0042);
content = null;
}else{
}
}byte[] content = null;
Blob blob = null;
while(