Use PreparedStatement Twice : PreparedStatement « Database SQL JDBC « Java






Use PreparedStatement Twice

 

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

public class Main {
  public static void main(String[] args) throws Exception {
    Connection conn = getHSQLConnection();
    System.out.println("Got Connection.");
    Statement st = conn.createStatement();
    st.executeUpdate("create table survey (id int,name varchar);");
    st.executeUpdate("create view surveyView as (select * from survey);");
    st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')");
    st.executeUpdate("insert into survey (id,name ) values (2,'anotherValue')");    

    ResultSet rs = null;
    PreparedStatement ps = null;

    String query = "select id, name from survey where id = ?";

    ps = conn.prepareStatement(query);
    // specify values for all input parameters
    ps.setInt(1, 001); // set the first parameter: id

    // now, PreparedStatement object is ready to be executed.
    rs = ps.executeQuery();
    // iterate the result set object
    while (rs.next()) {
      int id = rs.getInt(1);
      String name = rs.getString(2);
      System.out.println("[id=" + id + "][name=" + name + "]");
    }

    // NOTE: you may use PreparedStatement as many times as you want
    // here we use it for another set of parameters:
    ps.setInt(1, 002); // set the first parameter: id

    // now, PreparedStatement object is ready to be executed.
    rs = ps.executeQuery();
    // iterate the result set object
    while (rs.next()) {
      int id = rs.getInt(1);
      String name = rs.getString(2);
      System.out.println("[id=" + id + "][name=" + name + "]");
    }
    rs.close();
    ps.close();
    conn.close();

  }

  private static Connection getHSQLConnection() throws Exception {
    Class.forName("org.hsqldb.jdbcDriver");
    System.out.println("Driver Loaded.");
    String url = "jdbc:hsqldb:data/tutorial";
    return DriverManager.getConnection(url, "sa", "");
  }

  public static Connection getMySqlConnection() throws Exception {
    String driver = "org.gjt.mm.mysql.Driver";
    String url = "jdbc:mysql://localhost/demo2s";
    String username = "oost";
    String password = "oost";

    Class.forName(driver);
    Connection conn = DriverManager.getConnection(url, username, password);
    return conn;
  }

  public static Connection getOracleConnection() throws Exception {
    String driver = "oracle.jdbc.driver.OracleDriver";
    String url = "jdbc:oracle:thin:@localhost:1521:caspian";
    String username = "mp";
    String password = "mp2";

    Class.forName(driver); // load Oracle driver
    Connection conn = DriverManager.getConnection(url, username, password);
    return conn;
  }
}

           
         
  








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