es查询语句java使用_source_Elasticsearch source filter检索案例分享

Elasticsearch source filter检索案例分享

1.准备工作

先理解一下es source filter作用:通过在_source中指定includes和excludes，控制查询结果中哪些source字段要返回、哪些source字段不需要返回，source filter的dsl定义语法如下：

​​​​​​​{

"_source": {

"includes": [ "obj1.*", "obj2.*" ],

"excludes": [ "*.description" ]

},

"query" : {

"term" : { "user" : "kimchy" }

}

}

本文演示动态从外部传入includes和excludes实现source filter功能，适用于includes和excludes动态变化的source filter场景。

2.定义source filter dsl语句

首先，在DocumentCRUD案例对应的dsl配置文件esmapper/demo.xml中添加searchSourceFilter：

#if($includes || $excludes) ## 只有指定了includes或者excludes才需要添加source filter

"_source": {

#if($includes ) ##设置includes filter

"includes": [

#foreach($