test2.java

jsp编程jsp工程项目与实践 jsp源代码

package com.prodb;

import java.io.*;
import java.sql.*;

public class Test2 {

	private ResultSet rs;
	private Statement stmt;
	private Connection con;
	private PrintWriter out;
	private Blob blob;
	
	public void addBlob(String fileName) throws Exception{
		con=Test1.getCon();
		con.setAutoCommit(false);
		stmt=con.createStatement();
	//	stmt.execute("INSERT INTO Test1(data) VALUES (NULL)");
			rs=stmt.executeQuery("SELECT data FROM Test1 ");
			while(rs.next()){
				try{
					blob=rs.getBlob(1);
				}catch(Exception e){
					out.print(e);
				}
					InputStream bin=blob.getBinaryStream();
		//			System.out.println(blob);
					System.out.println(blob.length());
			}
			rs.close();
			stmt.close();
			con.close();
		/*File binaryFile=new File(fileName);
		System.out.println(fileName+"的长度="+binaryFile.length());
		FileInputStream instream=new FileInputStream(binaryFile);
			OutputStream outstream=null;
		int chunk=0;
		byte[] buffer=new byte[chunk];
		int length=-1;
		while((length=instream.read(buffer))!=-1){
			outstream.write(buffer,0,length);
			instream.close();
			outstream.close();
			con.commit();
		}*/
	}
}