## 创建索引
```
PUT /user
```
创建成功返回
```
{
"acknowledged" : true,
"shards_acknowledged" : true,
"index" : "user"
}
```
重复创建返回
```
{
"error" : {
"root_cause" : [
{
"type" : "resource_already_exists_exception",
"reason" : "index [user/uT3rebrgTUuFQd0sERL7Dw] already exists",
"index_uuid" : "uT3rebrgTUuFQd0sERL7Dw",
"index" : "user"
}
],
"type" : "resource_already_exists_exception",
"reason" : "index [user/uT3rebrgTUuFQd0sERL7Dw] already exists",
"index_uuid" : "uT3rebrgTUuFQd0sERL7Dw",
"index" : "user"
},
"status" : 400
}
```
