Java 连接数据库、执行SQL封装类

/*当执行SQL时发现不能连接数据库，先重连一次*/
 
import java.io.FileInputStream;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Date;
import java.util.TimerTask;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;
 
 
 
class SQL_OPERATION_TRAN {
//private Connection cn;
private PreparedStatement pst;
private ResultSet rs;
private boolean isAutoCommit=true;
private CallableStatement proc;
java.util.Timer tmReceive;
//int counter=0;
Main gbl_Main;
 
SQL_OPERATION_TRAN(Main main){
//cn=connection;
gbl_Main=main;
//this.CheckConnect();
// this.Connect();
}
 
public void Connect(){
//gbl_Main.cn=gbl_Main.con.getConnection();
String name = "com.microsoft.jdbc.sqlserver.SQLServerDriver";
String url = "jdbc:microsoft:sqlserver://10.10.10.10:1433;DatabaseName=aa";
String username = "bb";
String password = "cc";
try {
Class.forName(name);
try {
gbl_Main.cnTran = DriverManager.getConnection(url, username, password);
//DriverManager.setLoginTimeout(30000);
gbl_Main.gbl_ErrorCounter = 0;
gbl_Main.gbl_TryCounter = 0;
System.out.println("Connect="+gbl_Main.gbl_ErrorCounter);
} catch (SQLException ex) {
gbl_Main.gbl_ErrorCounter++;
Logger.getLogger(SQL_OPERATION.class.getName()).log(Level.SEVERE, null, ex);
}
} catch (ClassNotFoundException ex) {
Logger.getLogger(SQL_OPERATION.class.getName()).log(Leve