Rainie999 发表于 2018-9-22 09:11:22

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>  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>  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;
  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;
  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);
  }
  }
  }

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