如何通过struts以oci协议将文件上传到oracle数据库的blob字段

PreparedStatement ps = null ;

String union_Id = "" ;

String union_Version = "" ;

union_Id = theForm.getUnion_Id() ;

union_Version = theForm.getUnion_Version() ;

是数据库表中的字段名，由于表中有多个blob字段，所以用变量来表示其名称

String actionpart = theForm.getActionpart() ;

System.out.println("actionpart is:"+actionpart) ;

得数据库连接，dbPool的源代码附在后面

dbPool dbp = new dbPool();

conn = dbp.getConnection() ;

ResultSet BlobDetails = null;

Statement stmt = null;

try {

InputStream stream = null;

FileInputStream fstream = null;

stream = file.getInputStream();

System.out.println("------------uploadFileSize is : "+stream.available() +"------------") ;

conn.setAutoCommit(false);

stmt = conn.createStatement();

用empty_blob()来初始化该字段

sql = " update regunion set " + actionpart + " = empty_blob() where union_id= " + union_Id +" and union_Version = "+ union_Version;