java httpclient中文乱码解决方案,看注释

@RequestMapping("getpage")

    public ModelAndView admin_checkurl(HttpServletRequest request) throws IOException {

        ModelAndView mav = new ModelAndView();

        HttpClientBuilder builder = HttpClients.custom();   //我们可以使用一个Builder来设置UA字段，然后再创建HttpClient对象

        builder.setUserAgent("Mozilla/5.0(Windows;U;Windows NT 5.1;en-US;rv:0.9.4)");//对照UA字串的标准格式理解一下每部分的意思

        final CloseableHttpClient httpClient = builder.build();

        String targetUrl = "";

        //targetUrl =  request.getParameter("url");

        targetUrl = "http://www.ip138.com/";

        targetUrl = targetUrl.replace(" ", "");//去除所有的空格

        HttpGet httpget = new HttpGet(targetUrl);

        CloseableHttpResponse response = httpClient.execute(httpget);

        HttpEntity entity = response.getEntity();

        System.out.println(entity);

        String page = EntityUtils.toString(entity, "GBK");//GBK解决中文乱码

        System.out.println(page);

        // 解析网页 得到文档对象

        Document doc = Jsoup.parse(page);

        response.close();

        httpClient.close();

        mav.addObject("page", page);

        mav.setViewName("jsp/check_report");

        return mav;

    }