title: How to use queryString() in elasticsearch (java API)?
body: <p>I am working on elastic-search v1.1.1
  I faced a problem with search queries .I want to know How solve below obstacle </p>
  
  <p>Here is my mapping </p>
  
  <pre><code>{
    "token" : {
                 "type" : "string"
              }
  }
  </code></pre>
  
  <p>Data in indexed record is </p>
  
  <pre><code> {
     token : "4r5etgg-kogignjj-jdjuty687-ofijfjfhf-kdjudyhd"
   }
  </code></pre>
  
  <p>My search is </p>
  
  <pre><code>4r5etgg-kogignjj-jdjuty687-ofijfjfhf-kdjudyhd
  </code></pre>
  
  <p>I want exact match of the record ,which query I need to use to get exact match of the record
  can it be done </p>
  
  <pre><code>  QueryBuilders.queryString() ?
  </code></pre>
  
  <p>I checked with queryString() ,then I finalized its not useful for exact match</p>
  
  <p>Please suggest me </p>