Elasticsearch入门2 导入导出数据

将数据导入导出elasticsearch，对elasticsearch进行查询是常用操作。python特供很方便的接口，对数据进行导入导出。

参考博客

python批量导入数据进Elasticsearch http://blog.csdn.net/u012236368/article/details/51284587
[ElasticSearch]Term精确匹配中文字符串短语 http://blog.csdn.net/sunnyyoona/article/details/51842221
python操作Elasticsearch (一、例子) http://www.cnblogs.com/yxpblog/p/5141738.html
elasticsearch 查询（match和term） http://www.cnblogs.com/yjf512/p/4897294.html

代码

python导入Elasticsearch的代码很易懂，主要是对es.index方法中的body进行设置，用字典存储要投入的数据，记录如下：

#coding:utf-8'''python导入数据到es中查询数据'''from datetime import datetimefrom elasticsearch import Elasticsearchfrom elasticsearch import helperses = Elasticsearch(['localhost:9200'])'''#导入数据f = open('parse_table', 'r', encoding='utf-8')count = 0str_title = ''str_context = ''for row in f.readlines():    row = row.strip()    if count % 16 < 8:        str_title = str(row)    if 8 <= count % 16 <=15:        str_context = str(row)+str_context    if count % 16 == 15:        action = {}        action['title'] = str_title        action['context'] = str_context        #print(action)        es.index(index='guwen', doc_type='guwen', body=action)        str_context = ''    count += 1#print(count)'''

查询数据用get和search方法,search方法可以支持结构化查询。

result = es.search(index='guwen', doc_type='guwen', body={    "fields": [       "title",       "context"    ],    "query": {        "match_phrase": {           "context": {               "query": "若君父不敬其爲君父之道，則臣子便可以忿之耶？"           }        }    }})for hit in result['hits']['hits']:    print('this is title')    print(hit['fields']['title'])    print('this is context')    print(hit['fields']['context'])

利用elasticsearch查询的时候，如果想要精确查询字符串的时候，可以使用match_phrase，如上面所示。有其他需求，可以参考elasticsearch查询(match和term)中介绍。

另外，python还支持对数据的批量存入。

actions = []i = 1# for row_copy in f.readlines():#     print(row_copy)#     row_line = row_copy.split('<>')#     action={#         "_index":"xx",#         "_type":"yy",#         "_id":i,#         "_source":{#             'year':row_line[7].decode('utf-8'),#             'region':row_line[8].decode('utf-8'),#         }#     }#     i += 1#     actions.append(action)#     if len(actions) == 5:#         helpers.bulk(es, actions)#         del actions[0:len(actions)]## if len(actions)>0:#     helpers.bulk(es,actions)

其他语言php,java也都有对elasticsearch读取的接口。