/**
     *  读取本地html文件里的html代码
     * @param file  File file=new File("文件的绝对路径")
     * @return
     */
    public static String toHtmlString(File file) {
        // 获取HTML文件流
        StringBuffer htmlSb = new StringBuffer();
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(
                    new FileInputStream(file), "utf-8"));
            while (br.ready()) {
                htmlSb.append(br.readLine());
            }
            br.close();
            // 删除临时文件
            //file.delete();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        // HTML文件字符串
        String htmlStr = htmlSb.toString();
        // 返回经过清洁的html文本
        return htmlStr;
    }