Java读取properties

public class TestForProperties {

    public static void main(String[] args) throws Exception {
			//注意文件的路径问题！
        new TestForProperties().readValue("/mybatis.properties");
    }

    public void readValue(String fileName) throws Exception {

        InputStream resourceAsStream = this.getClass().getResourceAsStream(fileName);

        if (null != resourceAsStream) {

            Properties properties = new Properties();
            properties.load(resourceAsStream);

            Object o = properties.get("userName");

            System.out.println(o);
        }else{
            System.out.println("resourceAsStream is null");
        }
    }

}

文件目录：

参考文章