Java可读取操作系统的配置

/**
     * Java获取操作系统的配置环境
     * @throws Exception
     */
    @Test
    public void testPro() throws Exception {
        Properties properties = System.getProperties();
        for(Entry<Object, Object> entry:properties.entrySet()){
            System.out.println(entry.getKey()+"============="+entry.getValue());
        }
        
        //获取从根目录到项目名的路径
        String path = System.getProperty("user.dir");
        System.out.println(path);
    }