mysql8.0以后版本，数据库信息写在xxx.properties,如何读取配置文件

properties文件编写

driverClass=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://127.0.0.1:3306/student?useSSL=FALSE&serverTimezone=UTC
user=root
password=root

使用eclipse编写properties文件的时候注意将编码格式改为utf-8
，否则会因为字符转义问题报错

public class test {
    
    
	 private static String driver=null;
	 private static String url=null;
	 private static String user = null;
	 private static String password=null;
	 static{
    
    
		try {
    
    
			Properties properties = new Properties();
			InputStream is = test.class.getClassLoader().getResourceAsStream("jdbc.properties");
			properties.load(is);
			//读取属性
			driver = properties.getProperty("driverClass");
			url = properties.getProperty("url");
			user = properties.getProperty("user");
			password = properties.getProperty("password");
			
		} catch (IOException e) {
    
    
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	public static void main(String[] args) throws ClassNotFoundException, SQLException {
    
    
		Class.forName(driver);
		Connection connection=DriverManager.getConnection(url,user,password);
		Statement statement=connection.createStatement();
		ResultSet rSet=statement.executeQuery("select*from students");
		while(rSet.next()){
    
    
			for (int i = 1; i < 7; i++) {
    
    
				System.out.print(rSet.getString(i)+'\t');
			}
			System.out.println();
		}
	}
}

这里
是因为将properties文件放在了src目录下，需要使用类加载器，去读取src底下的资源文件。
如果放在根目录下，可以直接使用InputStream is = new FileInputStream("jdbc.properties")去调用。