/**
     * 解析字符串
     */
    @Test
    public void testString() throws Exception {
        //使用工具类读取文件，获取字符串
        String content = FileUtils.readFileToString(new File("C:\\Users\\lenovo\\Desktop\\test.html"), "utf8");
        //解析字符串
        Document document = Jsoup.parse(content);
        String titleStr = document.getElementsByTag("title").first().text();
        System.out.println(titleStr);
    }