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;
    }