爪哇国新游记之十四----初试JDBC

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

public class A{
    public static void search1(){
        Connection conn=null;
        PreparedStatement ps=null;
        ResultSet rs=null;
        
        try{
            Class.forName("com.mysql.jdbc.Driver");
            conn=DriverManager.getConnection("jdbc:mysql://127.0.0.1/test", "root", "hy");
            
            String sql=" select * from employee order by salary ";
            ps=conn.prepareStatement(sql);
            rs=ps.executeQuery();            
            
            while(rs.next()){
                System.out.print(rs.getString("id")+"\t");
                System.out.print(rs.getString("name")+"\t");
                System.out.print(rs.getString("sex")+"\t");
                System.out.print(rs.getInt("salary")+"\t");
                System.out.println();
            }
        }
        catch(SQLException se){
            try{
                conn.rollback();
            }
            catch(Exception ex){
                ex.printStackTrace();
            }
        }
        catch(Exception e){
            try{
                conn.rollback();
            }
            catch(Exception ex){
                ex.printStackTrace();
            }
        }
        finally{
            try{
                rs.close();
                ps.close();
                conn.close();
            }
            catch(Exception ex){
                ex.printStackTrace();
            }
        }
    }
}