Java 如何在 JSP 的表达式语言中放置“换行”？
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How to put "new line" in JSP's Expression Language?
提问by Roman Kagan
What would be right EL expression in JSP to have a new line or HTML's <br/>?
Here's my code that doesn't work and render with '\n' in text.
JSP 中的正确 EL 表达式有一个新行或 HTML 是<br/>什么？这是我的代码，它不起作用并在文本中使用 '\n' 进行渲染。
<af:outputText value="#{msg.TCW_SELECT_PART_ANALYSIS}\n#{msg.TCW_SELECT_PART_ANALYSIS2}"/>
采纳答案by Bozho
Since you want to output <br />, just do:
既然你想输出<br />，就做：
<af:outputText value="#{msg.TCW_SELECT_PART_ANALYSIS}<br />#{msg.TCW_SELECT_PART_ANALYSIS2}" escape="false" />
The attribute escape="false"is there to avoid the <br />being HTML-escaped.
该属性escape="false"是为了避免<br />被 HTML 转义。
You can even display the two messages in separate tags and put the <br />in plain text between them.
您甚至可以在单独的标签中显示两条消息，并<br />在它们之间放置纯文本。
<af:outputText value="#{msg.TCW_SELECT_PART_ANALYSIS}" />
<br />
<af:outputText value="#{msg.TCW_SELECT_PART_ANALYSIS2}" />
If you're still on JSF 1.1 or older, then you need to wrap plain HTML in <f:verbatim>like:
如果您仍在使用 JSF 1.1 或更旧的版本，那么您需要将纯 HTML 包装为<f:verbatim>：
<f:verbatim><br /></f:verbatim>
回答by Aaron Digulla
How about:
怎么样：
<af:outputText value="#{msg.TCW_SELECT_PART_ANALYSIS}"/>
<af:outputText value="#{msg.TCW_SELECT_PART_ANALYSIS2}"/>
(i.e. split the value and put the character you want between the two)?
（即拆分值并将您想要的字符放在两者之间）？
回答by Vincent Ramdhanie
If you want a new line in the browser then you need to put "<br/>" in the text. The browser will then interpret it correctly. It does not understand \n.
如果你想在浏览器中换行，那么你需要<br/>在文本中加入“ ”。然后浏览器将正确解释它。它不明白\n。
回答by BacMan
Write a custom function that calls this piece of code:
编写一个调用这段代码的自定义函数：
import java.util.StringTokenizer;
public final class CRLFToHTML {
public String process(final String text) {
if (text == null) {
return null;
}
StringBuilder html = new StringBuilder();
StringTokenizer st = new StringTokenizer(text, "\r\n", true);
while (st.hasMoreTokens()) {
String token = st.nextToken();
if (token.equals("\n")) {
html.append("<br/>");
} else if (token.equals("\r")) {
// Do nothing
} else {
html.append(token);
}
}
return html.toString();
}
}
