ext4&struts2 upload image json decode invalide.

在上传成功图片返回是却出现了這样的字符串导致无法decode，<pre style="word-wrap: break-word; white-space: pre-wrap;">{"success":true}</pre>，

這中情况下只需要在struts 配置文件中添加
<result type="json">
<param name="callbackParameter">response</param>
<param name="contentType">text/html;charset=utf-8</param>
<param name="includeProperties">success,result</param>
</result>
类似這样的参数，“You need to set the content-type of response as "text/html". If the content-type is "application/json" will have this problem. It's odd.“；
当然，另外还要注意，对图片url的处理字符的处理，
“your String”.replace("&", "&amp;").replace(">", "&gt;").replace("<", "&lt;").replace("'", "&apos;").replaceAll("\"", "&quot;"); but sometimes is no working。so，我把所有的“"”--->“”,把双引号空置，這样html 语句的格式在jsonDecode转换时却不会报错，转换之后还是保持html格式。
不知道這样是不是好的呢？testing......