代码改变世界

过滤JSON中的特殊字符

2011-01-08 12:21  音乐让我说  阅读(3467)  评论(2)  编辑  收藏  举报

过滤方法用的是Discuz中的过滤方法！

 

        /// <summary>
        /// 加载事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void Page_Load(object sender, EventArgs e)
        {
            if(!IsPostBack)
            {
                FileStream fsSteam = new FileStream(Server.MapPath("~/SQLLog.txt"), FileMode.Open); //SQLLog.txt 里面的文本为：今天真\n\\n\b\\\\\\的很"高兴"！
                StreamReader sr = new StreamReader(fsSteam,System.Text.Encoding.GetEncoding("gb2312"));
                string message = JsonCharFilter(sr.ReadToEnd()); // 这里需要过滤一下，以保证JSON解析后显示的值与SQLLog.txt中的一模一样。
                sr.Close();
                fsSteam.Dispose();
                string json = "{ IfSuccess : true, Message : '" + message + "' }";
                this.ltMessage.Text = json;
            }
        }

        /// <summary>
        /// Json特符字符过滤，参见http://www.json.org/
        /// </summary>
        /// <param name="sourceStr">要过滤的源字符串</param>
        /// <returns>返回过滤的字符串</returns>
        public static string JsonCharFilter(string sourceStr)
        {
            sourceStr = sourceStr.Replace("\\", "\\\\");
            sourceStr = sourceStr.Replace("\b", "\\\b");
            sourceStr = sourceStr.Replace("\t", "\\\t");
            sourceStr = sourceStr.Replace("\n", "\\\n");
            sourceStr = sourceStr.Replace("\n", "\\\n");
            sourceStr = sourceStr.Replace("\f", "\\\f");
            sourceStr = sourceStr.Replace("\r", "\\\r");
            return sourceStr.Replace("\"", "\\\"");
        }

 

前台代码：

 

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Literal ID="ltCurrentMessage" runat="server" />
    </div>
    <div id="divMessage"><asp:Literal ID="ltMessage" runat="server" /></div>
    <div>
        <asp:Button ID="btnSubmit" runat="server" Text="提交" OnClick="btnSubmit_Click" />
    </div>
    </form>
    <script language="javascript" type="text/javascript">
        ///<summary>用正则表达式将前后空格，用空字符串替代。</summary>
        String.prototype.trim = function()
        {
            return this.replace(/(^\s*)|(\s*$)/g, "");
        }
        var jsonStr = document.getElementById("divMessage").innerHTML.trim();
        var jsonObj = eval("(" + jsonStr + ")");
        alert(jsonObj.IfSuccess);
        alert(jsonObj.Message);
    </script>
</body>
</html>

 

谢谢浏览！