连接数据库

package util;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Properties;

public class DBUtil {

private static String user;
private static String password;
private static String url;
private static String driver;
private static ThreadLocal<Connection> tl = new ThreadLocal<Connection>();

static {
Properties p = new Properties();
try {
p.load(DBUtil.class.getClassLoader().getResourceAsStream(
"db.properties"));
user = p.getProperty("user");
password = p.getProperty("password");
url = p.getProperty("url");
driver = p.getProperty("driver");
Class.forName(driver);
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException("读取数据库配置文件失败！");
}
}