如何处理代码高亮问题？
对于代码高亮处理，是在写入数据库前处理呢，还是不写入数据库，读出后，再处理发到前端？
请指点。
回复内容：
对于代码高亮处理，是在写入数据库前处理呢，还是不写入数据库，读出后，再处理发到前端？
请指点。
推荐你读出来处理，数据库里面只需要记录原始数据即可。
代码高亮本质上属于表现层应该处理的内容，只有里面的代码段才应该放到持久层。
一般的，您的一段文字、一段代码，应该怎么显示啊？到底应该用什么字体啊？这些都应该是表现层的事儿。
既然有一般情况，当然就有特殊情况，比如那些富文本编辑器，就会把用户编辑的样式的都存储到数据库中。
比如 SF 只保存原始内容（我喜欢这种方式，我的博客也是），然后把内容读出来进行统一的显示。做到了内容和展示相分离。
至于QQ空间、博客、论坛，一般会把css连同html以前保存到数据库中，给了编辑者足够的灵活性，可以编写各种各样的东东，比如亮瞎眼球的文字闪烁等。
我倾向于数据库中只记录内容。
一般是在前端处理吧，比如segmentfault用了开源的highlight.js
看了题主的意思是铁了心准备放在后端做了。
很显然，写入数据库前处理呢，性能更好，因为不用每次读出都进行高亮处理，只用写入时一次性处理。
不写入数据库，读出时再处理的话，更优雅。因为数据库里只应该记录内容；存储和高亮应该正交地分离。这样也有利于将来的维护和修改。
用Google的Prettify.js使代码高亮
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