解决json包含html标签无法显示的问题

Posted 2020-09-10 石头皮

主要是将json无法识别的字符进行转义    

function dotran($str) {
        $str = str_replace(‘"‘,‘//"‘,$str);
        $str = str_replace("/r/n",‘//r//n‘,$str);
        $str = str_replace("/t",‘//t‘,$str);
        $str = str_replace("//",‘//‘,$str);
        $str = str_replace("/b",‘//b‘,$str);
        return $str;
    }
这样返回的数据就可以正常显示，下面是转换后的内容：
jsontext=‘{"jqry":[{"id":"121","userid":"0","status":"1","filename":"","url":"333333333","title":"aaaaaaa","type":"WatchTV","seq":"1","remark":"remarktext","content":"<p>//r//n//t<object classid=//"clsid:d27cdb6e-ae6d-11cf-96b8-444553540000//" codebase=//"http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0//"><param name=//"quality//" value=//"high//" /><param name=//"movie//" value=//"http://www.xxx.com/vod/COD4_Ep1.swf//" /><embed pluginspage=//"http://www.macromedia.com/go/getflashplayer//" quality=//"high//" src=//"http://www.xxx.com/vod/COD4_Ep1.swf//" type=//"application/x-shockwave-flash//"></embed></object></p>//r//n"}]}‘;

html转换函数
public string ChangeString(string str)
{
//str含有HTML标签的文本
str = str.Replace("<","&lt;");
str = str.Replace(">","&gt;");
str = str.Replace(" ","&nbsp;");
str = str.Replace("\n","<br>");
str = str.Replace("&","&amp;");
return str;
}
=======================

js字符过滤html标签互转函数
function htmlencode(str) {
 str = str.replace(/&/g, ‘&amp;‘);
 str = str.replace(/</g, ‘&lt;‘);
 str = str.replace(/>/g, ‘&gt;‘);
 str = str.replace(/(?:t| |v|r)*n/g, ‘<br />‘);
 str = str.replace(/  /g, ‘&nbsp; ‘);
 str = str.replace(/t/g, ‘&nbsp; &nbsp; ‘);
 str = str.replace(/x22/g, ‘&quot;‘);
 str = str.replace(/x27/g, ‘&#39;‘);
 return str;
}

function htmldecode(str) {
 str = str.replace(/&amp;/gi, ‘&‘);
 str = str.replace(/&nbsp;/gi, ‘ ‘);
 str = str.replace(/&quot;/gi, ‘"‘);
 str = str.replace(/&#39;/g, "‘");
 str = str.replace(/&lt;/gi, ‘<‘);
 str = str.replace(/&gt;/gi, ‘>‘);
 str = str.replace(/<br[^>]*>(?:(rn)|r|n)?/gi, ‘n‘);
 return str;
}

function textencode(str) {
 str = str.replace(/&amp;/gi, ‘&‘);
 str = str.replace(/</g, ‘&lt;‘);
 str = str.replace(/>/g, ‘&gt;‘);
 return str;
}

function textdecode(str) {
 str = str.replace(/&amp;/gi, ‘&‘);
 str = str.replace(/&lt;/gi, ‘<‘);
 str = str.replace(/&gt;/gi, ‘>‘);
 return str;
}

实例1

RT： 
返回的Json数据如下、带Html标签就无法显示了、 

{"articleList": [{"articleId":6,"title":"拜拜拜拜 吧","author":"superman","content":"BBBBBBBBBBBB","hits":"0"}, {"articleId":7,"title":"333","author":"superman","content":"333333333333333333333333333333333333","hits":"0"}, {"articleId":1,"title":"阿萨 德","author":"heshan","content":"test","hits":"0"}, {"articleId":2,"title":"阿萨德","author":"superman","content":"123<img src="http://localhost:8080/jpkc/admin/kindeditor/plugins/emoticons/0.gif" border="0" /><br />","hits":"0"},{"articleId":3,"title":"TEST1","author":"superman","content":"TEST1<br />","hits":"0"},{"articleId":4,"title":"测 试","author":"superman","content":"测试功能!!!!","hits":"0"}, {"articleId":5,"title":"test!","author":"superman","content":"KE.util.setFullHtml(‘content‘, ‘‘);","hits":"0"},]}

解决办法：
"content":"123<img src="http://localhost:8080/jpkc/admin/kindeditor/plugins/emoticons/0.gif" border="0"/><br/>"
改为
"content":"123<img src=‘http://localhost:8080/jpkc/admin/kindeditor/plugins/emoticons/0.gif‘ alt=‘‘ border=‘0‘ /><br/>"

js方法：str.replaceAll("\"","‘");

实例2：

从服务器端以JSON格式将数据传递到客户端后，通过JS显示在HTML页面时，有一些特殊字符不能直接显示，如后台传递过来的是 ‘<b>msg</b> #‘ 通过JS显示在HTML页面中时，显示成了 msg # ，并不是msg #，这是由于<与>之间的内容看作是HTML标签了，而以&开头的 与#为HTML实体，所以显示不正常。

解决办法很简单，在JS将其渲染到HTML页面前转换一下即可：

01	<script type="text/javascript">

02	var str = ‘<b>msg</b> #‘;

03	document.all.div1.innerHTML=‘<pre>‘+str+‘</pre>‘;

04

05	//js中的字符串正常显示在HTML页面中

06	String.prototype.displayHtml= function(){

07	//将字符串转换成数组

08	var strArr = this.split(‘‘);

09	//HTML页面特殊字符显示，空格本质不是，但多个空格时浏览器默认只显示一个，所以替换

10	var htmlChar="&<>";

11	for(var i = 0; i< str.length;i++){

12	//查找是否含有特殊的HTML字符

13	if(htmlChar.indexOf(str.charAt(i)) !=-1){

14	//如果存在，则将它们转换成对应的HTML实体

15	switch (str.charAt(i)) {

16

case ‘<‘:

17	strArr.splice(i,1,‘<‘);

18

break;

19

case ‘>‘:

20	strArr.splice(i,1,‘>‘);

21

break;

22

case ‘&‘:

23	strArr.splice(i,1,‘&‘);

24

}

25

}

26

}

27	return strArr.join(‘‘);

28

}

29	alert(str.displayHtml());

30	document.all.div2.innerHTML=str.displayHtml();

31

</script>