code: public <T> T getDocument(String indexName, String indexType,String documentId,Map<String,Object> options,Class<T> beanType) throws ElasticSearchException{
  		try{
  			SearchHit searchResult = this.client.executeRequest(BuildTool.buildGetDocumentRequest(  indexName,   indexType,  documentId,  options),null,   new GetDocumentResponseHandler( beanType),ClientUtil.HTTP_GET);
  
  			return ResultUtil.buildObject(searchResult, beanType);
  		}
  		catch(ElasticSearchException e){
  			return ResultUtil.hand404HttpRuntimeException(e,beanType,ResultUtil.OPERTYPE_getDocument);
  		}
  
  	}
docs: 获取文档，通过options设置获取文档的参数
  @param indexName
  @param indexType
  @param documentId
  @param options
  @return
  @throws ElasticSearchException