a simple example for PreparedStatement
package basics.in.java.blogspot.in; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; public class Main { private static final String USERNAME="root"; private static final String PASSWORD=""; private static final String CONN_STRING="jdbc:mysql://localhost/basicsinjavablogspot"; public static void main(String[] args) throws ClassNotFoundException, SQLException { Class.forName("com.mysql.jdbc.Driver"); Connection conn=null; Statement stmt=null; ResultSet rs=null; try { conn= DriverManager.getConnection(CONN_STRING, USERNAME, PASSWORD); System.out.println("database connection successful"); //stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY); String sql="select * from tours where tourId=?"; PreparedStatement stmtp=conn.prepareStatement(sql,ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY); //rs=stmt.executeQuery("select * from tours"); stmtp.setInt(1,1); rs=stmtp.executeQuery(); display(rs); } catch (SQLException e) { System.err.println(e); System.err.println("Error message:"+e.getMessage()); System.err.println("Error code is:"+e.getErrorCode()); System.err.println("sql state:"+e.getSQLState()); } finally{ if(rs!=null){ rs.close(); } if(stmt!=null){ stmt.close(); } if(conn!=null){ conn.close(); } } } public static void display(ResultSet rs) throws SQLException{ while(rs.next()){ StringBuffer sBuffer=new StringBuffer(); sBuffer.append("Tour id: "+rs.getInt("tourId")); System.out.println(sBuffer); } } }
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