connectionbean.java

有发布

package bean;

import java.sql.*;

public class ConnectionBean {

    private Connection con = null;

    public ConnectionBean() {
        try {
            //加载数据库驱动
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            con = DriverManager.getConnection("jdbc:odbc:yang", "", "");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public Connection getConnection() {
        //判断连接是否为空,如果为空自己创建一个
        if (con == null) {
            new ConnectionBean();
        }
        return con;
    }

}