如何利用java io stream把讀出的byte[] buffer寫入一個圖片檔案中？

package example; 
 
import java.io.*; 
import java.sql.*; 
 
public class Test { 
     
    public static void main(String[] args) throws Exception { 
        //write(); 
        read(); 
    } 
     
    public static void write() throws Exception { 
        Connection connection = getConnection(); 
        if(connection == null) { 
            return; 
        } 
         
        String sql = "insert into t2(pic) values(?)"; 
        String filePath = "/mnt/hda6/doc/Flower2.jpg"; 
        FileInputStream fis = new FileInputStream(filePath); 
        PreparedStatement pst = connection.prepareStatement(sql); 
        pst.setBinaryStream(1, fis, fis.available()); 
        pst.execute(); 
        pst.close(); 
        pst.close(); 
    } 
     
    public static void read() throws Exception { 
        Connection connection = getConnection(); 
        if(connection == null) { 
            return; 
        } 
        String sql = "select pic from t2"; 
        Statement st = connection.createStatement(); 
        ResultSet rs = st.executeQuery(sql); 
        byte[] buffer = new byte[1024]; 
         
        while(rs.next()) { 
            Blob b = rs.getBlob("pic"); 
            int size = (int) b.length(); 
            InputStream ips = b.getBinaryStream(); 
            FileOutputStream fos = new FileOutputStream("/home/x.jpg"); 
             
            while( (size = ips.read(buffer)) != -1) { 
                fos.write(buffer, 0, size); 
            } 
            fos.close(); 
            ips.close(); 
             
        } 
         
        rs.close(); 
        st.close(); 
        connection.close(); 
    } 
     
    public static Connection getConnection() { 
         
        Connection connection = null; 
         
        try { 
            String driverClass = "com.mysql.jdbc.Driver"; 
            String url = "jdbc:mysql://localhost/mydb?useUnicode=true&characterEncoding=GBK"; 
            String user = "root"; 
            String password = ""; 
             
            Class.forName(driverClass); 
            connection = DriverManager.getConnection(url, user, password); 
             
        } catch(Exception e) { 
            e.printStackTrace(); 
        } 
         
        return connection; 
    } 
}