JDBC读写Oracle10g的CLOB、BLOB

package lavasoft.oralob.common; 

import oracle.sql.BLOB; 

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

/** 
* JDBC读写Oracle10g的CLOB、BLOB 
* 
* @author: leizhimin 2010-5-26 21:12:55 
*/ 
public  class TestOraLob { 

         public  static  void main(String[] args) { 
                insertBlob(); 
                queryBlob(); 
        } 

         public  static  void insertBlob() { 
                Connection conn = DBToolkit.getConnection(); 
                PreparedStatement ps =  null; 
                 try { 
                        String sql =  "insert into test_oralob (ID, TSBLOB, TSCLOB) values (?, ?, ?)"; 
                        ps = conn.prepareStatement(sql); 
                        ps.setString(1,  "100"); 
                         //设置二进制BLOB参数 
                        File file_blob =  new File( "C:\\a.jpg"); 
                        InputStream in =  new BufferedInputStream( new FileInputStream(file_blob)); 
                        ps.setBinaryStream(2, in, ( int) file_blob.length()); 
                         //设置二进制CLOB参数 
                        File file_clob =  new File( "c:\\a.txt"); 
                        InputStreamReader reader =  new InputStreamReader( new FileInputStream(file_clob)); 
                        ps.setCharacterStream(3, reader, ( int) file_clob.length()); 
                        ps.executeUpdate(); 
                        in.close(); 
                }  catch (IOException e) { 
                        e.printStackTrace(); 
                }  catch (SQLException e) { 
                        e.printStackTrace(); 
                }  finally { 
                        DBToolkit.closeConnection(conn); 
                } 
        } 

         public  static  void queryBlob() { 
                Connection conn = DBToolkit.getConnection(); 
                PreparedStatement ps =  null; 
                Statement stmt =  null; 
                ResultSet rs =  null; 
                 try { 
                        String sql =  "select TSBLOB from TEST_ORALOB where id ='100'"; 
                        stmt = conn.createStatement(); 
                        rs = stmt.executeQuery(sql); 
                         if (rs.next()) { 
                                 //读取Oracle的BLOB字段 
                                InputStream in = rs.getBinaryStream(1); 
                                File file =  new File( "c:\\a1.jpg"); 
                                OutputStream out =  new BufferedOutputStream( new FileOutputStream(file)); 
                                 byte[] buff1 =  new  byte[1024]; 
                                 for ( int i = 0; (i = in.read(buff1)) > 0;) { 
                                        out.write(buff1, 0, i); 
                                } 
                                out.flush(); 
                                out.close(); 
                                in.close(); 
                                 //读取Oracle的CLOB字段 
                                 char[] buff2 =  new  char[1024]; 
                                File file_clob =  new File( "c:\\a1.txt"); 
                                OutputStreamWriter writer =  new OutputStreamWriter( new FileOutputStream(file_clob)); 
                                Reader reader = rs.getCharacterStream(1); 
                                 for ( int i = 0; (i = reader.read(buff2)) > 0;) { 
                                        writer.write(buff2, 0, i); 
                                } 
                                writer.flush(); 
                                writer.close(); 
                                reader.close(); 
                        } 
                        rs.close(); 
                        stmt.close(); 
                }  catch (IOException e) { 
                        e.printStackTrace(); 
                }  catch (SQLException e) { 
                        e.printStackTrace(); 
                }  finally { 
                        DBToolkit.closeConnection(conn); 
                } 
        } 
}