title: Java regex replace
body: <p>I've a csv string like </p>
  
  <pre><code>"abc, java, stackoverflow  ,     stack exchange   , test"
  </code></pre>
  
  <p>Can I use regex to remove the space around the commas to get a string like </p>
  
  <pre><code>"abc,java,stackoverflow,stack exchange,test"
  </code></pre>