讀取properties文件

InputStream in = getClass().getClassLoader().getResourceAsStream("jdbc.properties");
        Properties properties = new Properties();
        properties.load(in);
        driverClass = properties.getProperty("driver");
        jdbcURL = properties.getProperty("url");
        user = properties.getProperty("user");
        password 
 
= properties.getProperty("password");

peoperties配置文件的格式

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://127.0.0.1:3306/test
user=root
password=123

讀取properties文件