spring boot data redis如何将hashmap更改为Model

Question

刚开始接触spring和spring boot，现在正在使用spring data redis。

1. 我有这样一个模型

   @Entity
   @Table(name = "users")
   public class User {
       private Long id;
   
       @Id
       @javax.persistence.Column(name = "id", nullable = false, insertable = true, updatable = true)
   
       private String email;
   
       @Basic
       @javax.persistence.Column(name = "email", nullable = false, insertable = true, updatable = true, length = 128)
   
      //some other fields and getters and setters
   
   }
   

2. 在 redis 中，我们使用哈希存储用户模型，就像这样。关键是:u_id

   redis-cli> hgetall u_19999
     1) "id"
     2) "19999"
     3) "email"
     4) "xx@gmail.com"
     5) "weblink"
     6) "www.google.com"
   

3. 在spring boot数据redis中

   HashOperations<String, String, String> hashOperations = this.stringRedisTemplate.opsForHash();
   String key = "u_"+userId;
   Map<String, String> userMap = hashOperations.entries(key);
   

现在，userMap 是一个hashmap，包含Model User 的字段，现在我想将userMap 更改为Model User

我该怎么办？

提前致谢。

Answer 1

1. 首先得到所有字段

    HashOperations<String, String, String> hashOperations =            this.stringRedisTemplate.opsForHash();
    String key = "u_"+userId;
    Map<String, String> userMap = hashOperations.entries(key);
   

2. 使用 BeanUtilsHashMapper 类

   HashMapper<User, String, String> mapper = new BeanUtilsHashMapper<User>(User.class);
   return mapper.fromHash(userMap);