html转换为纯文本,支持撇号

 /// <summary>
        /// html转换为纯文本
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        private static string HtmlToPlainText(string source)
        {
            string result;

            //remove line breaks,tabs
            result = source.Replace("
", " ");
            result = result.Replace("
", " ");
            result = result.Replace("	", " ");

            //remove the header
            result = Regex.Replace(result, "(<head>).*(</head>)", string.Empty, RegexOptions.IgnoreCase);

            result = Regex.Replace(result, @"<( )*script([^>])*>", "<script>", RegexOptions.IgnoreCase);
            result = Regex.Replace(result, @"(<script>).*(</script>)", string.Empty, RegexOptions.IgnoreCase);

            //remove all styles
            result = Regex.Replace(result, @"<( )*style([^>])*>", "<style>", RegexOptions.IgnoreCase); //clearing attributes
            result = Regex.Replace(result, "(<style>).*(</style>)", string.Empty, RegexOptions.IgnoreCase);

            //insert tabs in spaces of <td> tags
            result = Regex.Replace(result, @"<( )*td([^>])*>", " ", RegexOptions.IgnoreCase);

            //insert line breaks in places of <br> and <li> tags
            result = Regex.Replace(result, @"<( )*br( )*>", "
", RegexOptions.IgnoreCase);
            result = Regex.Replace(result, @"<( )*li( )*>", "
", RegexOptions.IgnoreCase);

            //insert line paragraphs in places of <tr> and <p> tags
            result = Regex.Replace(result, @"<( )*tr([^>])*>", "

", RegexOptions.IgnoreCase);
            result = Regex.Replace(result, @"<( )*p([^>])*>", "

", RegexOptions.IgnoreCase);

            //remove anything thats enclosed inside < >
            result = Regex.Replace(result, @"<[^>]*>", string.Empty, RegexOptions.IgnoreCase);

            //replace special characters:
            result = Regex.Replace(result, @"&amp;", "&", RegexOptions.IgnoreCase);
            result = Regex.Replace(result, @"&nbsp;", " ", RegexOptions.IgnoreCase);
            result = Regex.Replace(result, @"&lt;", "<", RegexOptions.IgnoreCase);
            result = Regex.Replace(result, @"&gt;", ">", RegexOptions.IgnoreCase);
            result = Regex.Replace(result, @"&#39;", "'", RegexOptions.IgnoreCase);
            result = Regex.Replace(result, @"&(.{2,6});", string.Empty, RegexOptions.IgnoreCase);

            //remove extra line breaks and tabs
            result = Regex.Replace(result, @" ( )+", " ");
            result = Regex.Replace(result, "(
)( )+(
)", "

");
            result = Regex.Replace(result, @"(

)+", "
");

            return result;
        }

相关阅读:
使用intellij idea搭建spring-springmvc-mybatis整合框架环境
 lij IDEA项目包分层结构显示设置
 SpringMVC---applicationContext.xml
SpringMVC 常用applicationContext.xml、web.xml、servlet-mvc.xml简单配置
 java web，从零开始，一步一步配置ssm(Spring+SpringMVC+MyBatis)框架
 Spring+SpringMVC+MyBatis+easyUI整合进阶篇(二)RESTful API实战笔记(接口设计及Java后端实现)
SSM后台管理系统（Spring SpringMVC Mybatis Mysql EasyUI）
SSM 搭建精美实用的管理系统
 SSM搭建一个后台管理系统
 mac下的夜神模拟器链接vscode
原文地址：https://www.cnblogs.com/haorui/p/4228490.html