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<div><h1>20 WrapperQuery</h1>
<h2>实现方式理论基础</h2>
<ul>
<li>Wrapper Query 官网说明</li>
</ul>
<p>https://www.elastic.co/guide/en/elasticsearch/reference/6.4/query-dsl-wrapper-query.html</p>
<blockquote>
<p>This query is more useful in the context of the Java high-level REST client or transport client to also accept queries as json formatted string. In these cases queries can be specified as a json or yaml formatted string or as a query builder (which is a available in the Java high-level REST client).</p>
</blockquote>
<pre><code class="language-json">GET /_search
{
&quot;query&quot; : {
&quot;wrapper&quot;: {
&quot;query&quot; : &quot;eyJ0ZXJtIiA6IHsgInVzZXIiIDogIktpbWNoeSIgfX0=&quot; // Base64 encoded string: {&quot;term&quot; : { &quot;user&quot; : &quot;Kimchy&quot; }}
}
}
}
</code></pre>
<ul>
<li>将DSL JSON语句 转成 map</li>
</ul>
<p>https://blog.csdn.net/qq_41370896/article/details/83658948</p>
<pre><code class="language-java">String dsl = &quot;&quot;;
Map maps = (Map)JSON.parse(dsl);
maps.get(&quot;query&quot;);// dsl query string
</code></pre>
<ul>
<li>Java 代码</li>
</ul>
<p>https://blog.csdn.net/tcyzhyx/article/details/84566734</p>
<p>https://www.jianshu.com/p/216ca70d9e62</p>
<pre><code class="language-java">StringBuffer dsl = new StringBuffer();
dsl.append(&quot;{\&quot;bool\&quot;: {&quot;);
dsl.append(&quot; \&quot;must\&quot;: [&quot;);
dsl.append(&quot; {&quot;);
dsl.append(&quot; \&quot;term\&quot;: {&quot;);
dsl.append(&quot; \&quot;mdid.keyword\&quot;: {&quot;);
dsl.append(&quot; \&quot;value\&quot;: \&quot;2fa9d41e1af460e0d47ce36ca8a98737\&quot;&quot;);
dsl.append(&quot; }&quot;);
dsl.append(&quot; }&quot;);
dsl.append(&quot; }&quot;);
dsl.append(&quot; ]&quot;);
dsl.append(&quot; }&quot;);
dsl.append(&quot;}&quot;);
WrapperQueryBuilder wqb = QueryBuilders.wrapperQuery(dsl.toString());
SearchResponse searchResponse = client.prepareSearch(basicsysCodeManager.getYjzxYjxxIndex())
.setTypes(basicsysCodeManager.getYjzxYjxxType()).setQuery(wqb).setSize(10).get();
SearchHit[] hits = searchResponse.getHits().getHits();
for(SearchHit hit : hits){
String content = hit.getSourceAsString();
System.out.println(content);
}
</code></pre>
<ul>
<li>query + agg 应该怎么写</li>
</ul>
<p>http://www.itkeyword.com/doc/1009692843717298639/wrapperquerybuilder-aggs-query-throwing-query-malformed-exception</p>
<pre><code class="language-json">&quot;{\&quot;query\&quot;:{\&quot;match_all\&quot;: {}},\&quot;aggs\&quot;:{\&quot;avg1\&quot;:{\&quot;avg\&quot;:{\&quot;field\&quot;:\&quot;age\&quot;}}}}&quot;
SearchSourceBuilder ssb = new SearchSourceBuilder();
// add the query part
String query =&quot;{\&quot;match_all\&quot;: {}}&quot;;
WrapperQueryBuilder wrapQB = new WrapperQueryBuilder(query);
ssb.query(wrapQB);
// add the aggregation part
AvgBuilder avgAgg = AggregationBuilders.avg(&quot;avg1&quot;).field(&quot;age&quot;);
ssb.aggregation(avgAgg);
</code></pre>
<h2>实现示例</h2>
<p>略</p>
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