请教关于html_strip不管用的问题

使用的版本是5.2.0应该是和现在最新的5.3.0一样的
 我想使用html_strip过滤HTML代码，但是不成功
我的操作步骤是这样的：
1.使用java代码创建了index,并且设置了setting

GET /aaasasn



-------------------



    "settings": {

      "index": {

        "number_of_shards": "5",

        "provided_name": "aaasasn",

        "creation_date": "1493360822756",

        "analysis": {

          "analyzer": {

            "my_analyzer": {

              "char_filter": [

                "my_char_filter"

              ],

              "tokenizer": "standard"

            }

          },

          "char_filter": {

            "my_char_filter": {

              "escaped_tags": [

                "b"

              ],

              "type": "html_strip"

            }

          }

        },

        "number_of_replicas": "1",

        "uuid": "54N_yuSnSVigPVMCPujImw",

        "version": {

          "created": "5020099"

        }

      }

    }

2.为特定字段mapping设置 analyzer ：my_analyzer
查看结果如下：

没贴全 ，只贴了重点 

"aaasasn": {

    "aliases": {},

    "mappings": {

      "test_bean": {

        "properties": {

          "content6": {

            "type": "text",

            "fields": {

              "keyword": {

                "type": "keyword",

                "ignore_above": 256

              }

            }

          },

          "content7": {

            "type": "text",

            "analyzer": "my_analyzer"

          },

3.查询，发现结果里面还是带有html代码

GET /aaasasn/_search

{

  "query": {

    "match": {

      "content7": "我"

    }

  }

}



-----------------------------------------

{

  "took": 1,

  "timed_out": false,

  "_shards": {

    "total": 5,

    "successful": 5,

    "failed": 0

  },

  "hits": {

    "total": 1,

    "max_score": 0.2876821,

    "hits": [

      {

        "_index": "aaasasn",

        "_type": "test_bean",

        "_id": "201",

        "_score": 0.2876821,

        "_source": {

          "id": 201,

          "name": "<input>content</input>",

          "content7": "<p>我来看看</p>",

          "remark": "12122",

          "is_finished": true,

          "test_bean2_id": 2

        }

      }

    ]

  }

}

按照官网操作的，地址是
https://www.elastic.co/guide/e ... ut_20
 
 
求大大们能解答一下，被这东西弄的挺难受的