创建属性文件

新建 db-oracle.properties , 存放项目必须使用到的参数：

driver = oracle.jdbc.driver.OracleDriver
url = jdbc:oracle:thin:@192.168.0.23:1521:htlwk
username = openlab
password = open123

解析属性文件获取数据

使用类加载器

public class ConnectionUtils {private static String driver;private static String url;private static String user;private static String password;static {try {Properties props = new Properties();// 获得类加载器ClassLoader cl = ConnectionUtils.class.getClassLoader();// 调用类加载器的方法去加载在类路径下的文件InputStream is = cl.getResourceAsStream("com/tarena/tts/db.properties");// 将文件的内容读到props对象中props.load(is);driver = props.getProperty("driver");url = props.getProperty("url");user = props.getProperty("user");password = props.getProperty("password");} catch (Exception e) {throw new RuntimeException(e);}}}

使用 File 对象

public static void getParam(String fileName) {Properties props = new Properties();File file = new File(fileName);try {// 读入 fileName 指定的文件FileInputStream fileInputStream = new FileInputStream(file);// 加载解析输入流指定的文件props.load(fileInputStream);// 获取文件中键值对的值，并赋值给全局变量url = props.getProperty("url");dbUser = props.getProperty("dbUser");dbPassword = props.getProperty("dbPassword");driver = props.getProperty("driver");} catch (IOException e) {e.printStackTrace();}}