# 17.4.1 string类型 字符串类型是Redis中最为基础的数据存储类型，该类型可以接受任何格式的数据，如JPEG图像数据或Json对象描述信息等。在Redis中字符串类型的Value最多可以容纳的数据长度是512M。 ## 保存 如果设置的键不存在则为添加，如果设置的键已经存在则修改 * 设置键值 ``` set key value ``` * 设置键值及过期时间，以秒为单位 ``` setex key seconds value ``` * 设置多个键值 ``` mset key1 value1 key2 value2 ... ``` * 追加值 ``` append key value ``` ## 中文乱码问题的解决 a) 退出redis客户端 ``` Exit ``` b) 再次进图redis客户端 ``` Redis-cli --raw ``` ## 获取 * 获取：根据键获取值，如果不存在此键则返回nil ``` get key ``` * 根据多个键获取多个值 ``` mget key1 key2 ... ``` ## 删除 详⻅下节键的操作，删除键时会将值删除 --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://wiki.clay-wangzhi.com/17-redis/17.4-shu-ju-ku-cao-zuo/17.4.1-string-lei-xing.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.