如何在gsp grails文件上显示字符串新行？

问题描述

我在数据库中存储了一个字符串。当我保存并检索字符串时，我得到的结果如下所示：

这就是我从println命令，当我调用save和index方法。

但是当我在屏幕上显示它时。它显示为：

已经尝试显示如下：

  $ {adviceInstance.advice？.encodeAsHTML（）} 
  

但仍然是同样的事情。 p>

我是否需要将\\\
替换为？或类似的东西？有没有更简单的方法来正确显示它？

解决方案

常见问题有多种解决方案

可能是你用< br>替换\\\


所以无论是在你的控制器/服务，或者如果你喜欢在gsp中：

  $ {adviceInstance.advice？.replace（'\\ \\ n'，'< br>'）} 
  

2>只有textarea

 < g：textArea name =somethingreadonly =true> 
 $ {adviceInstance.advice} 
< / g：textArea> 
  

使用< pre> 标记

 < pre> 
 $ {adviceInstance.advice} 
< / pre> 
  

4>使用css white-space ：

 < div class =space> 
< / div> 
 
 // css code：
 
 .space {
 white-space：pre 
} 
  

如果你有一个严格的配置来存储这些字段，那么当你通过表单提交它时，我还没有其他的元素深入研究它的实际情况，它可能实际上是回归车或\ r，无论如何在下面的评论中解释。关于设置每次接收元素时修剪元素的setter的好规则。即：

 类建议{
字符串建议
静态约束= {
建议：false，minSize：1，maxSize：255）
} 
 
 / * 
 *在这种情况下，使用a maxSize值，确保
 *设置您自己的setter修剪任何隐藏的\ $ 
 *，它们可能会被最终用户作为表单请求
 *的一部分回传。相信我，我了解到困难的方式。 
 * / 
 void setAdvice（String adv）{
 advice = adv.trim（）
} 
 
} 
  

I've stored a string in the database. When I save and retrieve the string and the result I'm getting is as following:

That is what I get from a println command when I call the save and index methods.

But when I show it on screen. It's being shown like:

Already tried to show it like the following:

${adviceInstance.advice?.encodeAsHTML()}

But still the same thing.

Do I need to replace \n to
or something like that? Is there any easier way to show it properly?

解决方案

Common problems have a variety of solutions

1> could be you that you replace \n with <br>

so either in your controller/service or if you like in gsp:

${adviceInstance.advice?.replace('\n','<br>')}

2> display the content in a read-only textarea

 <g:textArea name="something" readonly="true">
  ${adviceInstance.advice}
 </g:textArea>

3> Use the <pre> tag

<pre>
 ${adviceInstance.advice}
</pre>

4> Use css white-space http://www.w3schools.com/cssref/pr_text_white-space.asp:

<div class="space">
</div>

//css code:

.space {
 white-space:pre
}

Also make a note if you have a strict configuration for the storage of such fields that when you submit it via a form, there are additional elements I didn't delve into what it actually was, it may have actually be the return carriages or \r, anyhow explained in comments below. About the good rule to set a setter that trims the element each time it is received. i.e.:

Class Advice {
 String advice
  static constraints = {
     advice(nullable:false, minSize:1, maxSize:255)
  }

  /*
   * In this scenario with a a maxSize value, ensure you
   * set your own setter to trim any hidden \r
   * that may be posted back as part of the form request
   * by end user. Trust me I got to know the hard way.
   */
  void setAdvice(String adv) {
    advice=adv.trim()
  }

}

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