elasticsearch学习之Pattern Tokenizer

官方网站说明http://www.elasticsearch.org/guide/reference/index-modules/analysis/pattern-tokenizer.html 

//elasticsearch.yml 

index :
    analysis :
        analyzer :
            pattern_analyzer:
                type: custom
                tokenizer: pattern_tokenizer
        tokenizer:
            pattern_tokenizer:
                type: pattern
                pattern: \'([^\']+)\'
                group: -1

 测试 

curl -XGET http://localhost:9200/index/_analyze?text=aaa%20'bbb'%20'ccc'&analyzer=pattern_analyzer

group=-1时

{
tokens: [
{
    token: "aaa ",
    start_offset: 0,
    end_offset: 4,
    type: "word",
    position: 1
},
{
    token: " ",
    start_offset: 9,
    end_offset: 10,
    type: "word",
    position: 2
}
]
}

group=0时

{
tokens: [
{
    token: "'bbb'",
    start_offset: 4,
    end_offset: 9,
    type: "word",
    position: 1
},
{
    token: "'ccc'",
    start_offset: 10,
    end_offset: 15,
    type: "word",
    position: 2
}
]
}

group=1时

{
tokens: [
{
    token: "bbb",
    start_offset: 5,
    end_offset: 8,
    type: "word",
    position: 1
},
{
    token: "ccc",
    start_offset: 11,
    end_offset: 14,
    type: "word",
    position: 2
}
]
}

group=2时

{
    error: "IndexOutOfBoundsException[No group 2]",
    status: 500
}