Java自己动手写连接池二

读取数据库文件，来操作：

package com.kama.cn;

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

public class DBConfigUtil {

private static String DB_URL = "";
private static String DB_USER = "";
private static String DB_PASSWORD = "";
private static String DB_DRIVER = "";

// 初始化
static {
try {
ConfigurationManager config = ConfigurationManager.instance();
DB_URL = config.getValue("jdbcUrl");
DB_USER = config.getValue("user");
DB_PASSWORD = config.getValue("password");
DB_DRIVER = config.getValue("driver");
} catch (Exception e) {
throw new RuntimeException("Config error, msg=" + e.getMessage(), e);
}
}

public static Connection getConn() {
Connection conn = null;
try {
Class.forName(DB_DRIVER);
conn = DriverManager.getConnection(DB_URL,DB_USER,DB_PASSWORD);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
return conn;
}
}