HttpResponse writer doesn't print "\n"

Question

I'm coding a Java Servlet that has to handle my request and return a string as response.

The response is composed by 2 lines, so I write my servlet code:

response.getWriter().println(line1 + "\n");
response.getWriter().println(line2);

But in my html page, the response is displayed as an unique line. How can I display my response in 2 different line ?

My project is an Angular2 project and I retrieve the response in this way:

constructor(private http: Http) { }

this.http.get(url)
         .toPromise()
         .then(response => response.text())

EDIT

I solved changing my HTML result, by adding the attribute innerHTML:

<div innerHTML="{{response text}}">

Answer 1

Linebreaks和其他空格都在HTML中作为单个空格处理。这与Java，Angular或servlet无关。

如果要在HTML中分隔一行，可以使用单独的元素，<br>或pre格式化元素或其他各种选项。

.pre {
  white-space: pre;
}

<div>
Line 1
Line 2
Note there is no displayed line break
</div>
<hr>
<div>
Line 1
<br>Line 2
<br>Note there is a displayed line break
</div>
<hr>
<div>
  <div>Line 1</div>
  <div>Line 2</div>
  <div>Note there is a displayed line break</div>
</div>
<hr>
<pre>
Line 1
Line 2
Note there is a displayed line break
</pre>
<hr>
<div class="pre">
Line 1
Line 2
Note there is a displayed line break
</div>

Answer 2

Because \n is whitespace in HTML, and HTML 'user agents should collapse input white space sequences when producing output inter-word space'. Perhaps you are looking for <br/>?

NB You should be using print(), or write(), not println().