MakeMysqlBean.java

/*
 public MakeMysqlBean(){
  try{
  //驱动拷贝到lib中
  Class.forName(driverName);     
    con = DriverManager.getConnection("jdbc:mysql://"+serverName+":3306/"+mydatabase+"? user="+username+"&password="+password+"&useUnicode=true&characterEncoding=GBK");
  }
  catch(Exception e) 
  {
   System.out.print("连接出错"+e); 
  }
 }
*/
package common;
import java.sql.*;
public class MakeMysqlBean
{
    private Connection con = null;
 private ResultSet rs;
 private String driverName = "org.gjt.mm.mysql.Driver"; // MySQL MM JDBC driver
 private String serverName = "localhost";
 private String mydatabase = "demo";
 private String username = "root";
 private String password = "123456";
 public MakeMysqlBean(){
  try{
         String url = "jdbc:mysql://" + serverName +  "/" + mydatabase; // a JDBC url
         Class.forName(driverName);
   //con = DriverManager.getConnection(url, username, password);
   con = DriverManager.getConnection("jdbc:mysql://"+serverName+":3306/"+mydatabase+"?user="+username+"&password="+password+"&useUnicode=true&characterEncoding=GBK");
   //con.setAutoCommit(false);
  }
  catch (ClassNotFoundException e) {
   // Could not find the database driver
   System.out.println("Could not find the database driver");
  } catch (SQLException e) {
   // Could not connect to the database
   System.out.println("Could not connect to the database");
  }
 }
 public Connection getCon(){
  return con;
 }
 public ResultSet getRs(String sql)throws Exception{
  try{
   Statement stmt = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
   rs = stmt.executeQuery(sql);
  }
  catch(Exception e){
   e.printStackTrace();
  }
      return rs;
 }
 public int executeUpdate( String sql ) {
  int count = 0;
  try {
   Statement stmt = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
   count = stmt.executeUpdate( sql );
   if(count !=0 ) ;
    //con.commit();
   else ;
    //con.rollback();
  }
  catch ( SQLException ex ) {
   ex.printStackTrace();
  }
  return count;
 }
 public void close(){
  try{
   if(con != null)
    con.close();
  }
  catch(Exception e){
   e.printStackTrace();
  }
 }
}