SpringBoot2.3整合redis缓存自定义序列化的实现

1.引言

我们使用redis作为缓存中间件时，当我们第一次查询数据的时候，是去数据库查询，然后查到的数据封装到实体类中，实体类会被序列化存入缓存中，当第二次查数据时，会直接去缓存中查找被序列化的数据，然后反序列化被我们获取。我们在缓存中看到的序列化数据不直观，如果想看到类似json的数据格式，就需要自定义序列化规则。

2.整合redis

pom.xml:

<!--引入redis-->
    <dependency>
      <groupid>org.springframework.data</groupid>
      <artifactid>spring-data-redis</artifactid>
      <version>2.3.0.release</version>
    </dependency>
    <dependency>
      <groupid>redis.clients</groupid>
      <artifactid>jedis</artifactid>
    </dependency>

application.yml：

spring:
 redis:
  host: 192.168.85.130
  port: 6379
  database: 0

springboot主配置类要加上@enablecaching注解

3.自定义序列化

@configuration
public class myredisconfig {
  @bean
  public redistemplate<object, object> empredistemplate(redisconnectionfactory redisconnectionfactory)throws unknownhostexception {
    redistemplate<object,object> template = new redistemplate<>();
    template.setconnectionfactory(redisconnectionfactory);
    jackson2jsonredisserializer<object> serializer = new jackson2jsonredisserializer<object>(object.class);
    template.setdefaultserializer(serializer);
    return template;
  }

  @bean
  public cachemanager cachemanager(redisconnectionfactory factory){
    rediscacheconfiguration cacheconfiguration = rediscacheconfiguration.defaultcacheconfig()
        .entryttl(duration.ofdays(1))
        .disablecachingnullvalues()
        .serializekeyswith(redisserializationcontext.serializationpair
            .fromserializer(new stringredisserializer()))
        .serializevalueswith(redisserializationcontext.serializationpair.fromserializer(new genericjackson2jsonredisserializer()));
    return rediscachemanager.builder(factory).cachedefaults(cacheconfiguration).build();}
}

4.测试

deptservice：

@service
public class deptservice {
  @autowired
  departmentmapper departmentmapper;
  @cacheable(value = "dept")
  public department findbyid(integer id){
  system.out.println("查询"+id+"号部门");
    department department = departmentmapper.getdeptbyid(id);
    return department;
  }
}

employeeservice：

@service
public class employeeservice {
  @autowired
  employeemapper employeemapper;
 	@cacheable(value = "emp")
  public employee findbyid(integer id){
    system.out.println("查询"+id+"号员工");
    employee employee = employeemapper.getempbyid(id);
    return employee;
  }
}

@cacheable(value = “dept”) ：该注解在方法上，方法传入参数默认为key值，方法返回值为value值，注解的参数value = "dept"是缓存的名子

结果：

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