Clob: getSubString(long pos, int length) : Clob « java.sql « Java by API

1. Java by API
2. java.sql
3. Clob

Clob: getSubString(long pos, int length)

 

import java.sql.Clob;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

public class Main{
  public static Connection getConnection() throws Exception {
    String driver = "org.gjt.mm.mysql.Driver";
    String url = "jdbc:mysql://localhost/databaseName";
    String username = "root";
    String password = "root";
    Class.forName(driver);
    Connection conn = DriverManager.getConnection(url, username, password);
    return conn;
  }
  public static String getCLOB(int id) throws Exception {
    Connection conn = null;
    ResultSet rs = null;
    PreparedStatement pstmt = null;
    String query = "SELECT clobData FROM tableName WHERE id = ?";

    try {
      conn = getConnection();
      pstmt = conn.prepareStatement(query);
      pstmt.setInt(1, id);
      rs = pstmt.executeQuery();
      rs.next();
      Clob clob = rs.getClob(1);
      // materialize CLOB onto client
      String wholeClob = clob.getSubString(1, (int) clob.length());
      return wholeClob;
    } finally {
      rs.close();
      pstmt.close();
      conn.close();
    }
  }

  public static void main(String args[]) throws Exception {
    System.out.println(getCLOB(01));
  }
}

   
  

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