查找分类为Java 的文章

/articles/_search?q=category:java
/articles/_search?q=java&df=category

/articles/_search?q=category:java架构师
/articles/_search?q=content:java架构师


/articles/_search?q=content:java架构师&default_operator=and
/articles/_search?q=content:java架构师&default_operator=or

/articles/_search?q=content:java架构师&default_operator=or&analyzer=standard
/articles/_search?q=content:java架构师&default_operator=or&analyzer=simple
/articles/_search?q=content:java%20架构师&default_operator=or&analyzer=simple

/articles/_search?q=content:java架构师&default_operator=or&analyzer=ik_smart
/articles/_search?q=content:java架构师&default_operator=or&analyzer=ik_max_word


/articles/_search?q=java程序员&default_operator=and
/articles/_search?q=java程序员&df=title&default_operator=and



POST /articles/_search
{
  "query":{
    "term":{
      "category":"java"
    }
  }
}

{
  "query":{
    "term":{
      "category":"java架构师"
    }
  }
}


全文检索
POST /articles/_search
{
  "query":{
    "match":{
      "category":"Java架构师"
    }
  }
}



POST /articles/_search
{
  "query":{
    "match":{
      "title":"Java架构师"
    }
  }
}

POST /articles/_search
{
  "query":{
    "match":{
      "content":"Java架构师"
    }
  }
}

POST /articles/_search
{
  "query":{
    "match":{"Java架构师"}
  }
}


{
  "profile": "true",
  "query":{
    "term":{
      "content":"java架构师"
    }
  }
}

{
  "profile": "true",
  "query":{
    "match":{
      "content":"java架构师"
    }
  }
}

{
  "profile": "true",
  "query":{
    "match_phrase":{
      "content":"java架构师"
    }
  }
}


{
    "query": {
        "multi_match": {
        	"query": "java",
    	     "fields": ["title", "content","category"]
        }
    }
}

{
  "query": {"terms": {"title": ["java","linux"]}}
}



Analysis
文本分析 分词  把文本转换成一系列单词(term/token)
Analysis通过Analyzer来实现

analyzer 三大组件
character filters , tokenizers , token filters

1) character filter 字符过滤器
   文本预处理，譬如过滤html标签 
2) tokenizers 分词器
   英文分词可以根据空格将单词分开,中文分词比较复杂 
3) Token filters  Token过滤器
   将切分的单词进行加工 ，大小写转换 ，去掉词（例如停用词等），或者增加词（例如同义词）

三者顺序
Character Filters--->Tokenizer--->Token Filter

POST _analyze
{
  "analyzer": "standard",
  "text": "Java架构师"
}

{
  "analyzer": "standard",
  "text": "Java 架构师"
}

{
  "analyzer": "simple",
  "text": "Java架构师"
}

{
  "analyzer": "simple",
  "text": "Java 架构师"
}


{
  "analyzer": "ik_smart",
  "text": "Java架构师"
}

{
  "analyzer": "ik_smart",
  "text": "Java 架构师"
}

{
  "analyzer": "ik_max_word",
  "text": "Java架构师"
}

{
  "analyzer": "ik_max_word",
  "text": "Java 架构师"
}




{
  "tokenizer": "lowercase",
  "text": "JAVA 架构师"
}

{
  "tokenizer": "standard",
  "filter": ["lowercase"], 
  "text": "JAVA 架构师"
}


html字符过滤


{
  "tokenizer": "ik_max_word",
  "filter": ["lowercase"], 
  "char_filter":  [ "html_strip" ],
  "text": "我是<br> <b>JAVA 架构师</b>"
}





 Elasticsearch分词器 
 elasticsearch5.0基于url的搜索接口