Elasticsearch2.3.4 配置同义词和中文分词

1安装Elasticsearch2.3.4

elasticsearch安装的前提是jdk，elasticsearch5.x后需要jdk8来支持，本文安装的是es2.3.4版本故用jdk7。

下载es2.3.4

wget https://download.elastic.co/elasticsearch/release/org/elasticsearch/distribution/tar/elasticsearch/2.3.4/elasticsearch-2.3.4.tar.gz

解压es2.3.4

cd /usr/local/redis
tar -zxvf elasticsearch-2.3.4.tar.gz

配置elasticsearch

修改配置文件：vim $ES_HOME/config/elasticsearch.yml

cluster.name: zzht-es-clusternode.name: es-node-1network.host: xxx.xxx.xx.xxxhttp.port: 9200discovery.zen.ping.unicast.hosts: ["xxx.xxx.xx.xxx"]

同义词索引配置

index:    analysis:      analyzer:        ik_syno:            type: custom            tokenizer: ik_max_word            filter: [my_synonym_filter]        ik_syno_smart:            type: custom            tokenizer: ik_smart            filter: [my_synonym_filter]      filter:        my_synonym_filter:            type: synonym            synonyms_path: analysis/synonym.txt

配置elasticsearch集群

复制elasticsearch-node-1：
cp -rf /elasticsearch-cluster/elasticsearch-node-1 elasticsearch-node-2
修改配置（只需要修改节点名称和端口）：

node.name: es-node-2http.port: 9201

修改完成后分别启动即可：
/elasticsearch-cluster/elasticsearch-node-1/bin/elasticsearch -d
/elasticsearch-cluster/elasticsearch-node-2/bin/elasticsearch -d

2.安装elasticsearch-analysis-ik

根据版本对应关系ik-1.9.4 和es2.3.4匹配（注意哦！）
https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v1.9.4/elasticsearch-analysis-ik-1.9.4.zip

将elasticsearch-analysis-ik-1.9.4.zip解压到$ES_HOME/plugins/ik文件夹中。

修改配置 vim $ES_HOME/plugins/ik/config/IKAnalyzer.cfg.xml

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd"><properties>    <comment>IK Analyzer 扩展配置</comment>    <!--用户可以在这里配置自己的扩展字典 -->    <!--<entry key="ext_dict">custom/mydict.dic;custom/single_word_low_freq.dic</entry> -->    <!--用户可以在这里配置自己的扩展停止词字典-->    <!--<entry key="ext_stopwords">custom/ext_stopword.dic</entry> -->    <!--用户可以在这里配置远程扩展字典 -->    <entry key="remote_ext_dict">http://service.xxx.com/download/custom_main.dic</entry>    <!--用户可以在这里配置远程扩展停止词字典-->    <entry key="remote_ext_stopwords">http://service.xxx.com/download/ext_stopword.dic</entry></properties>

3.同义词注意事项

• 同义词字典或是IK用户自定义词典更新，必须每次重启elasticsearch才有效。
• 同义词词对是必须能被完成切分的词语。比如在synonyms.txt 文件中增加同义词对： ‘超级土豆’ – ‘土豆’ 。但在实际的搜索中用“超级土豆”是搜不到“土豆”的。因为“超级土豆”会被切分为多个词语。必须在http://service.xxx.com/download/custom_main.dic词典中新加“超级土豆”一词，才能用“超级土豆”一词搜出“土豆”。

4.创建索引和映射

curl -XPUT http://xxx:9200/goods

curl -XPOST http://xxx:9200/goods/goods_info/_mapping

{  "goods_info": {    "_all": {        "enabled": true,        "analyzer": "ik_max_word",        "search_analyzer": "ik_max_word",        "term_vector": "no",        "store": "false"    },    "properties": {      "goodsId": {        "type": "long"      },      "createTime": {        "type": "long"      },      "price": {        "type": "double"      },      "refPrice": {        "type": "double"      },      "details": {        "type": "string"      },      "inventory": {        "type": "long"      },      "userId": {        "type": "long"      },      "name": {        "type": "string",        "store": "no",        "term_vector": "with_positions_offsets",        "analyzer": "ik_syno",        "search_analyzer": "ik_syno",        "include_in_all": "true",        "boost": 8      },      "shelfTime": {        "type": "long"      },      "goodsImage": {        "type": "string"      },      "goodSizes": {        "type": "string"      }    }  }}

5.测试

在synonyms.txt 文件中增加
爱他美,爱她美,爱它美
并且需要将“爱她美“和”爱它美”放到custom_main.dic并发布大nginx，
请求：
http://xxx:9200/goods/_analyze?analyzer=ik_syno_smart&pretty=true&text=爱它美
查看同义词是否起作用。