properties 配置和简单读取

#每一行后一定不能有空格
db.driver   = com.mysql.jdbc.Driver
db.url      = jdbc:mysql://192.168.0.183:3306/zuipin?userunicode=true&characterEncoding=utf8
db.user = zuipin
db.password = zuipin


//简单读取



    public void aa() {
        //创建配置对象
        Properties pro = new Properties();
        try {
            //加载配置文件
            pro.load(Demo.class.getClassLoader().getResourceAsStream("db.properties"));
            System.out.println(pro.get("db.driver"));
            System.out.println(pro.get("db.url"));
            System.out.println(pro.get("db.user"));
            System.out.println(pro.get("db.password"));

            Class.forName(pro.getProperty("db.driver"));
            //加载链接
            Connection conn = DriverManager.getConnection(pro.getProperty("db.url"), pro.getProperty("db.user"), pro.getProperty("db.password"));
            System.out.println(conn);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }