1、首先，例如，下面的数据被提交给ES该指数
{"number":32768,"singer":"杨坤","size":"5109132","song":"今夜二十岁","tag":"中国好声音","timelen":319}
{"number":32769,"singer":"汪峰","size":"6001697","song":"我爱你中国","tag":"中国好声音","timelen":375}
{"number":32780,"singer":"汪峰","size":"4070469","song":"我如此爱你","tag":"中国好声音","timelen":254}
{"number":32796,"singer":"大小姐","size":"3046005","song":"登大人","tag":"儿歌","timelen":190}
{"number":32896,"singer":"Bandari","size":"3869593","song":"The Golden Land","tag":"胎教音乐","timelen":241}
{"number":32977,"singer":"Bandari","size":"3477514","song":"Childhood Memory","tag":"欧美","timelen":217}
2、ElasticSearch‘s query DSL
搜索的RESTful接口是_search
URL形式：http://ip:port/index/type/_search
query查询语句通过POST的方式发送到ES。
a、主要的全文检索
查找索引库中包括"音乐"的记录
{
"query": {
"query_string": {
"query": "音乐"
}
}
}
b、指定字段进行检索
查找song字段中含有中国的记录
{
"query": {
"query_string": {
"query": "中国",
"fields": [
"song"
]
}
}
}
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c、多字段权重查询
在song、tag两个字段中搜索keyword“中国”，假设在song字段中出现权重是2。tag中是默认的1。
通过结果能够看到歌曲名中含有中国是排在前面。
{
"query": {
"multi_match": {
"query": "中国",
"fields": [
"song^2",
"tag"
]
}
}
}
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很多其它具体的查询语法能够參考：http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-queries.html
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