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需求：以索引中的boostapp列作为评分的基础分值，同时根据carpublishtime（数据的刷新时间字段）按时间进行衰减。
基于Groovy脚本实现。
1、query脚本方式：
{
"fields": [
"boost",
"ucarid",
"boostapp",
"carpublishtime"
],
"query": {
"function_score": {
"query": {
"match_all": {}
},
"functions": [
{
"script_score": {
"script": "import java.util.Date;import java.text.DateFormat;import java.text.SimpleDateFormat;time2=((new Date().getTime()- new SimpleDateFormat(‘yyyy-MM-dd HH:mm:ss‘).parse(_source.carpublishtime.replace(‘T‘,‘ ‘)).getTime())/60000);if(time2<=60)_source.boostapp+time2/5 else if(time2<=120)_source.boostapp+(time2/10-6)*8 else if(time2<=180)_source.boostapp+(time2/10-12)*5 else _source.boostapp"
}
}
],
"boost_mode": "replace",
"score_mode": "sum"
}
},
"from": 0,
"size": 10
}
2、Nest方式：
QueryContainer mainQuery = null; FunctionScoreQuery funcQuery = new FunctionScoreQuery(); funcQuery.ScoreMode = FunctionScoreMode.Sum; funcQuery.BoostMode = FunctionBoostMode.Replace; funcQuery.MaxBoost = 1000.0f; ScriptFilter scriptFilter = new ScriptFilter(); scriptFilter.Script = "import java.util.Date;import java.text.DateFormat;import java.text.SimpleDateFormat;time2=((new Date().getTime()- new SimpleDateFormat(‘yyyy-MM-dd HH:mm:ss‘).parse(_source.carpublishtime.replace(‘T‘,‘ ‘)).getTime())/60000);if(time2<=60)_source.boostapp+time2/5 else if(time2<=120)_source.boostapp+(time2/10-6)*8 else if(time2<=180)_source.boostapp+(time2/10-12)*5 else _source.boostapp"; funcQuery.ScriptScore = scriptFilter; mainQuery &= funcQuery;
Elasticsearch的Groovy Script自定义评分检索
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原文地址：http://www.cnblogs.com/lijunhao/p/5564835.html
