SpringBoot 整合篇 笔记--Spring Boot与缓存

Spring Boot与缓存 

缓存-JSR107 

  Java Caching定义了5个核心接口,分别是CachingProvider, CacheManager, Cache, Entry Expiry

  • CachingProvider定义了创建、配置、获取、管理和控制多个CacheManager。一个应用可以在运行期访问多个CachingProvider
  • CacheManager定义了创建、配置、获取、管理和控制多个唯一命名的Cache,这些Cache存在于CacheManager的上下文中。一个CacheManager仅被一个CachingProvider所拥有。
  • Cache是一个类似Map的数据结构并临时存储以Key为索引的值。一个Cache仅被一个CacheManager所拥有。
  • Entry是一个存储在Cache中的key-value对。
  • Expiry 每一个存储在Cache中的条目有一个定义的有效期。一旦超过这个时间,条目为过期的

缓存-Spring缓存抽象

Spring从3.1开始定义了org.springframework.cache.Cache
和org.springframework.cache.CacheManager接口来统一不同的缓存技术;
并支持使用JCache(JSR-107)注解简化我们开发;

Cache接口为缓存的组件规范定义,包含缓存的各种操作集合;
Cache接口下Spring提供了各种xxxCache的实现;如RedisCache,EhCacheCache , ConcurrentMapCache等;

每次调用需要缓存功能的方法时,Spring会检查检查指定参数的指定的目标方法是否已经被调用过;

如果有就直接从缓存中获取方法调用后的结果,如果没有就调用方法并缓存结果后返回给用户。下次调用直接从缓存中获取。
使用Spring缓存抽象时我们需要关注以下两点;
1、确定方法需要被缓存以及他们的缓存策略
2、从缓存中读取之前缓存存储的数据

缓存-几个重要概念&缓存注解

 

 

缓存-缓存使用 

 初试缓存Cache:

项目结构

启动类:

package com.example.testcache;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cache.annotation.EnableCaching;

@MapperScan(value = "com.example.testcache.mapper")  //配置所有的Mapper
@SpringBootApplication
@EnableCaching//开启缓存
public class TestcacheApplication {

    public static void main(String[] args) {
        SpringApplication.run(TestcacheApplication.class, args);
    }

}
TestcacheApplication

配置文件:

spring.datasource.url=jdbc:mysql://localhost:3306/test_cache?serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=root
#spring.datasource.driver-class-name=com.mysql.jdbc.Driver

# 开启驼峰命名匹配规则
mybatis.configuration.map-underscore-to-camel-case=true

logging.level.com.example.testcache.mapper=debug
#
#debug=true
#
spring.redis.host=10.87.18.41
application.properties

Controller:

package com.example.testcache.controller;

import com.example.testcache.bean.Department;
import com.example.testcache.bean.Employee;
import com.example.testcache.mapper.DepartmentMapper;
import com.example.testcache.mapper.EmployeeMapper;
import com.example.testcache.service.DeptService;
import com.example.testcache.service.EmployeeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

//import com.example.testmybatis.mapper.EmployeeMapper;

@RestController
public class DeptController {

    @Autowired
    DepartmentMapper departmentMapper;

    @Autowired
    EmployeeMapper employeeMapper;

    @Autowired
    EmployeeService employeeService;


    @Autowired
    DeptService deptService;


    @GetMapping("/dept/{id}")
    public Department getDepartment(@PathVariable("id") Integer id){
        return deptService.getDeptById(id);
    }

    @GetMapping("/dept")
    public Department insertDept(Department department){
        departmentMapper.insertDept(department);
        return department;
    }

    @GetMapping("/emp/{id}")
    public Employee getEmp(@PathVariable("id") Integer id){
        return employeeService.getEmpById(id);
    }
    @GetMapping("/emp")
    public Employee updateEmp(Employee employee){
        return employeeService.updateEmp(employee);
    }

    @GetMapping("/del/{id}")
    public String deleteEmp(@PathVariable("id") Integer id){
        employeeService.deleteEmp(id);
        return "success";
    }

    @GetMapping("/emp/lastName/{lastName}")
    public Employee getEmpByLastName(@PathVariable("lastName") String lastName){
        return  employeeService.getEmpByLastName(lastName);
    }

}
DeptController

Mapper:

package com.example.testcache.mapper;

import com.example.testcache.bean.Department;
import org.apache.ibatis.annotations.*;


//指定这是一个操作数据库的mapper
@Mapper
public interface DepartmentMapper {

    @Select("select * from department where id=#{id}")
    public Department getDeptById(Integer id);

    @Delete("delete from department where id=#{id}")
    public int deleteDeptById(Integer id);

    @Options(useGeneratedKeys = true,keyProperty = "id")
    @Insert("insert into department(department_name) values(#{departmentName})")
    public int insertDept(Department department);

    @Update("update department set department_name=#{departmentName} where id=#{id}")
    public int updateDept(Department department);
}
DepartmentMapper
package com.example.testcache.mapper;


import com.example.testcache.bean.Employee;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

//@Mapper或者@MapperScan将接口扫描装配到容器中
@Mapper
public interface EmployeeMapper {
    @Select("select * from employee where id=#{id}")
    public Employee getEmpById(Integer id);

    @Select("select * from employee where lastName=#{lastName}")
    public Employee getEmpByLastName(String lastName);

    @Update("update employee set lastName=#{lastName},email=#{email},gender=#{gender},d_id=#{dId} where id=#{id}")
    public void updateEmp(Employee employee);

    @Delete("delete from employee where id=#{id}")
    public int deleteEmp(Integer id);

}
EmployeeMapper

Service: 

package com.example.testcache.service;

import com.example.testcache.bean.Department;
import com.example.testcache.bean.Employee;
import com.example.testcache.mapper.DepartmentMapper;
import com.example.testcache.mapper.EmployeeMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.cache.Cache;
import org.springframework.cache.annotation.*;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.stereotype.Service;

@CacheConfig(cacheNames="dept"/*,cacheManager = "employeeCacheManager"*/) //抽取缓存的公共配置
@Service
public class DeptService {
    @Autowired
    DepartmentMapper departmentMapper;
    @Qualifier("empoyeeCacheManager")
    @Autowired
    private RedisCacheManager empoyeeCacheManager;
    /**
     * 主要针对方法配置,能够根据方法的请求参数对其结果进行缓
     **/
//    @Cacheable(cacheNames = {"dept"})
//    @Cacheable(cacheNames = {"dept"},key="#root.methodName+'['+#id+']'")  //自定义Key
//    @Cacheable(cacheNames = {"dept"}, keyGenerator="myKeyGenerator")  //自定义Key生成器:
//    @Cacheable(cacheNames = {"dept"}, keyGenerator="myKeyGenerator" ,condition = "#a0>1",unless = "#a0 == 2")  //自定义Key生成器 判断 >1:
    public Department getDeptById(Integer id){
        // 内部编码方式
        Department department = departmentMapper.getDeptById(id);
        Cache dept = empoyeeCacheManager.getCache("dept");
        dept.put("dept:1",department);
        System.out.println("部门查询");
        return department;
    }

}
DeptService
package com.example.testcache.service;

import com.example.testcache.bean.Employee;
import com.example.testcache.mapper.EmployeeMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.*;
import org.springframework.stereotype.Service;
@CacheConfig(cacheNames="employee"/*,cacheManager = "employeeCacheManager"*/) //抽取缓存的公共配置
@Service
public class EmployeeService {
    @Autowired
    EmployeeMapper employeeMapper;
    /**
     * 主要针对方法配置,能够根据方法的请求参数对其结果进行缓
     **/
//    @Cacheable(cacheNames = {"employee"})
    @Cacheable(cacheNames = {"employee"},key="#root.methodName+'['+#id+']'")  //自定义Key
//    @Cacheable(cacheNames = {"employee"}, keyGenerator="myKeyGenerator")  //自定义Key生成器:
//    @Cacheable(cacheNames = {"employee"}, keyGenerator="myKeyGenerator" ,condition = "#a0>1",unless = "#a0 == 2")  //自定义Key生成器 判断 >1:
    public Employee getEmpById(Integer id){
        Employee employee = employeeMapper.getEmpById(id);
        System.out.println("员工查询");
        return employee;
    }

    /**
     * 保证方法被调用,又希望结果被缓存。
     **/
    @CachePut(value ="employee",key = "#employee.id")//key = "#employee.id":使用传入的参数的员工id
//    @CachePut(value ="employee",key = "#result.id")// key = "#result.id":使用返回结果集后的id
    public Employee updateEmp(Employee employee){
        System.out.println("updateEmp:"+employee);
        employeeMapper.updateEmp(employee);
        return employee;
    }

    /**
     * 清空缓存
     **/
    @CacheEvict(value="employee",key = "#id") //删除指定key
//    @CacheEvict(value="employee",key = "#id", allEntries = true) //删除指定key  allEntries = true:指定清除这个缓存中所有的数据
//    @CacheEvict(value="employee",beforeInvocation = true/*key = "#id",*/) //删除指定key  beforeInvocation   代表清除缓存操作是在方法运行之前执行,无论方法是否出现异常,缓存都清除
    public void deleteEmp(Integer id){
        System.out.println("deleteEmp:"+id);
//        employeeMapper.deleteEmp(id);
        int i = 10/0;
    }


    // @Caching 定义复杂的缓存规则
    @Caching(
            cacheable = {
                    @Cacheable(value="employee",key = "#lastName")  //员工名字
            },
            put = {
                    @CachePut(value="employee",key = "#result.id"),//员工ID
                    @CachePut(value="employee",key = "#result.email")//员工邮箱
            }
    )
    public Employee getEmpByLastName(String lastName){
        return employeeMapper.getEmpByLastName(lastName);
    }
}
EmployeeService

@Cacheable:主要针对方法配置,能够根据方法的请求参数对其结果进行缓存

原理

将方法的运行结果进行缓存;以后再要相同的数据,直接从缓存中获取,不用调用方法;
CacheManager管理多个Cache组件的,对缓存的真正CRUD操作在Cache组件中,每一个缓存组件有自己唯一一个名字;



原理:
  1、自动配置类;CacheAutoConfiguration
  2、缓存的配置类
  org.springframework.boot.autoconfigure.cache.GenericCacheConfiguration
  org.springframework.boot.autoconfigure.cache.JCacheCacheConfiguration
  org.springframework.boot.autoconfigure.cache.EhCacheCacheConfiguration
  org.springframework.boot.autoconfigure.cache.HazelcastCacheConfiguration
  org.springframework.boot.autoconfigure.cache.InfinispanCacheConfiguration
  org.springframework.boot.autoconfigure.cache.CouchbaseCacheConfiguration
  org.springframework.boot.autoconfigure.cache.RedisCacheConfiguration
  org.springframework.boot.autoconfigure.cache.CaffeineCacheConfiguration
  org.springframework.boot.autoconfigure.cache.GuavaCacheConfiguration
  org.springframework.boot.autoconfigure.cache.SimpleCacheConfiguration【默认】
  org.springframework.boot.autoconfigure.cache.NoOpCacheConfiguration
  3、哪个配置类默认生效:SimpleCacheConfiguration;
原理

运行流程

4、给容器中注册了一个CacheManager:ConcurrentMapCacheManager
5、可以获取和创建ConcurrentMapCache类型的缓存组件;他的作用将数据保存在ConcurrentMap中;

运行流程:
@Cacheable:
1、方法运行之前,先去查询Cache(缓存组件),按照cacheNames指定的名字获取;
   (CacheManager先获取相应的缓存),第一次获取缓存如果没有Cache组件会自动创建。
2、去Cache中查找缓存的内容,使用一个key,默认就是方法的参数;
   key是按照某种策略生成的;默认是使用keyGenerator生成的,默认使用SimpleKeyGenerator生成key;
       SimpleKeyGenerator生成key的默认策略;
               如果没有参数;key=new SimpleKey();
               如果有一个参数:key=参数的值
               如果有多个参数:key=new SimpleKey(params);
3、没有查到缓存就调用目标方法;
4、将目标方法返回的结果,放进缓存中

@Cacheable标注的方法执行之前先来检查缓存中有没有这个数据,默认按照参数的值作为key去查询缓存,
如果没有就运行方法并将结果放入缓存;以后再来调用就可以直接使用缓存中的数据;

核心:
   1)、使用CacheManager【ConcurrentMapCacheManager】按照名字得到Cache【ConcurrentMapCache】组件
   2)、key使用keyGenerator生成的,默认是SimpleKeyGenerator


几个属性:
   cacheNames/value:指定缓存组件的名字;将方法的返回结果放在哪个缓存中,是数组的方式,可以指定多个缓存;

   key:缓存数据使用的key;可以用它来指定。默认是使用方法参数的值  1-方法的返回值
           编写SpEL; #i d;参数id的值   #a0  #p0  #root.args[0]
           getEmp[2]

   keyGenerator:key的生成器;可以自己指定key的生成器的组件id
           key/keyGenerator:二选一使用;


   cacheManager:指定缓存管理器;或者cacheResolver指定获取解析器

   condition:指定符合条件的情况下才缓存;
           ,condition = "#id>0"
       condition = "#a0>1":第一个参数的值》1的时候才进行缓存

   unless:否定缓存;当unless指定的条件为true,方法的返回值就不会被缓存;可以获取到结果进行判断
           unless = "#result == null"
           unless = "#a0==2":如果第一个参数的值是2,结果不缓存;
   sync:是否使用异步模式
View Code

自定义Key生成器:

package com.example.testcache.config;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration; 

import java.lang.reflect.Method;
import java.util.Arrays;
@Configuration
public class MyCacheConfig{
    @Bean("myKeyGenerator")
    public KeyGenerator keyGenerator(){
        return new KeyGenerator(){
            @Override
            public Object generate(Object target, Method method, Object... params) {
                return method.getName()+"["+ Arrays.asList(params).toString()+"]";
            }
        };
    }
}
MyCacheConfig

@CachePut:保证方法被调用,又希望结果被缓存。

  /**
     * @CachePut:既调用方法,又更新缓存数据;同步更新缓存
     * 修改了数据库的某个数据,同时更新缓存;
     * 运行时机:
     *  1、先调用目标方法
     *  2、将目标方法的结果缓存起来
     *
     * 测试步骤:
     *  1、查询1号员工;查到的结果会放在缓存中;
     *          key:1  value:lastName:张三
     *  2、以后查询还是之前的结果
     *  3、更新1号员工;【lastName:zhangsan;gender:0】
     *          将方法的返回值也放进缓存了;
     *          key:传入的employee对象  值:返回的employee对象;
     *  4、查询1号员工?
     *      应该是更新后的员工;
     *          key = "#employee.id":使用传入的参数的员工id;
     *          key = "#result.id":使用返回后的id
     *             @Cacheable的key是不能用#result
     *      为什么是没更新前的?【1号员工没有在缓存中更新】
     *
     */
    @CachePut(value ="employee",key = "#employee.id")//key = "#employee.id":使用传入的参数的员工id
//    @CachePut(value ="employee",key = "#result.id")// key = "#result.id":使用返回结果集后的id
    public Employee updateEmp(Employee employee){
        System.out.println("updateEmp:"+employee);
        employeeMapper.updateEmp(employee);
        return employee;
    }
View Code

@CacheEvict:清空缓存

 key:指定要清除的数据
 allEntries = true:指定清除这个缓存中所有的数据
 beforeInvocation = false:缓存的清除是否在方法之前执行
     默认代表缓存清除操作是在方法执行之后执行;如果出现异常缓存就不会清除

 beforeInvocation = true:
     代表清除缓存操作是在方法运行之前执行,无论方法是否出现异常,缓存都清除

    /**
     * 清空缓存
     **/
    @CacheEvict(value="employee",key = "#id") //删除指定key
//    @CacheEvict(value="employee",key = "#id", allEntries = true) //删除指定key  allEntries = true:指定清除这个缓存中所有的数据
//    @CacheEvict(value="employee",beforeInvocation = true/*key = "#id",*/) //删除指定key  beforeInvocation   代表清除缓存操作是在方法运行之前执行,无论方法是否出现异常,缓存都清除
    public void deleteEmp(Integer id){
        System.out.println("deleteEmp:"+id);
//        employeeMapper.deleteEmp(id);
        int i = 10/0;
    }
View Code

@Caching:定义复杂的缓存规则

@Caching(
            cacheable = {
                    @Cacheable(value="employee",key = "#lastName")  //员工名字
            },
            put = {
                    @CachePut(value="employee",key = "#result.id"),//员工ID
                    @CachePut(value="employee",key = "#result.email")//员工邮箱
            }
    )
    public Employee getEmpByLastName(String lastName){
        return employeeMapper.getEmpByLastName(lastName);
    }
View Code

@EnableCaching:开启基于注解的缓存  参考Controller层

@CacheConfig:抽取缓存的公共配置 

@CacheConfig(cacheNames="employee"/*,cacheManager = "employeeCacheManager"*/) //抽取缓存的公共配置
@Service
public class EmployeeService {

注意:使用异步不支持unless

缓存-整合redis实现缓存 

引入spring-boot-starter-data-redis
application.yml配置redis连接地址
使用RestTemplate操作redis
redisTemplate.opsForValue();  //操作字符串
redisTemplate.opsForHash();  //操作hash
redisTemplate.opsForList();     //操作list
redisTemplate.opsForSet();     //操作set
redisTemplate.opsForZSet();   //操作有序set
配置缓存、CacheManagerCustomizers
测试使用缓存、切换缓存、 CompositeCacheManager

 安装镜像:

 连接:

引入redis启动器:

官网:

 

<!-- 引入redis --> 
<dependency>
             <groupId>org.springframework.boot</groupId> 
             <artifactId>spring-boot-starter-data-redis</artifactId>
 </dependency>                

配置redisConfig:

package com.example.testcache.config;

import com.example.testcache.bean.Employee;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;

import java.time.Duration;

@Configuration
public class MyRedisConfig {
    @Bean
    public RedisTemplate<Object, Employee> empredisTemplate(RedisConnectionFactory redisConnectionFactory) throws Exception {
        RedisTemplate<Object, Employee> template = new RedisTemplate<Object, Employee>();
        template.setConnectionFactory(redisConnectionFactory);
        Jackson2JsonRedisSerializer<Employee> ser = new Jackson2JsonRedisSerializer<Employee>(Employee.class);
        template.setDefaultSerializer(ser);
        return template;
    }

    @Bean
    public RedisCacheManager empoyeeCacheManager(RedisConnectionFactory factory) {
        RedisCacheConfiguration cacheConfiguration =
                RedisCacheConfiguration.defaultCacheConfig()
                        .entryTtl(Duration.ofDays(1)) //失效时间
                        .disableCachingNullValues()   //序列化
                        .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new
                                GenericJackson2JsonRedisSerializer()));
        return RedisCacheManager.builder(factory).cacheDefaults(cacheConfiguration).build();

    }
}
MyRedisConfig

问题1:

  存入redis 的数据,没有序列化?

解决:

 将数据以json储存:

  方法1:将数据直接转成json

  方法2:在配置类配置序列化规则,加入容器

package com.example.testcache;

import com.example.testcache.bean.Employee;
import com.example.testcache.mapper.EmployeeMapper;
import org.junit.jupiter.api.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.test.context.junit4.SpringRunner;

import java.io.Serializable;

@RunWith(SpringRunner.class)
@SpringBootTest
class TestcacheApplicationTests{

    @Autowired
    EmployeeMapper employeeMapper;
    @Autowired
    StringRedisTemplate stringRedisTemplate;//操作k-v字符串
    @Autowired
    RedisTemplate redisTemplate;//k-v都是对象

    @Autowired
    RedisTemplate<Object,Employee> employeeRedisTemplate;//k-v都是对象
    @Test
    public void contextLoads() {
        Employee employee=employeeMapper.getEmpById(1);
        System.out.println("Message="+employee);
    }
    /**Redis常见的五大数据类型
     * String(字符串〕、List(列表)、set(集合)、Hash(散列)、ZSet(有序集合)
     * stringRedisTemplate.opsForValue()[String(字符串〕]
     * stringRedisTemplate.opsForList()[List(列表)]
     * stringRedisTemplate.opsForHash()[set(集合)]
     * stringRedisTemplate.opsForSet()[Hash(散列)]
     * stringRedisTemplate.opsForZSet()[ZSet(有序集合)]
     * */
    @Test
    public void testRedis(){
        stringRedisTemplate.opsForValue().append("msg","hello");
//        String msg = stringRedisTemplate.opsForValue().get("msg");
//        System.out.println("Message="+msg);
//        stringRedisTemplate.opsForList().leftPush("mylist","1");
//        stringRedisTemplate.opsForList().leftPush("mylist","2");
    }

    @Test
    public void testObjectRedis(){
        Employee employee=employeeMapper.getEmpById(1);
        redisTemplate.opsForValue().set("emp-01",employee);
    }

}
TestcacheApplicationTests

结果:

直接使用缓存管理器

  @Bean
    public RedisCacheManager empoyeeCacheManager(RedisConnectionFactory factory) {
        RedisCacheConfiguration cacheConfiguration =
                RedisCacheConfiguration.defaultCacheConfig()
                        .entryTtl(Duration.ofDays(1)) //失效时间
                        .disableCachingNullValues()   //序列化
                        .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new
                                GenericJackson2JsonRedisSerializer()));
        return RedisCacheManager.builder(factory).cacheDefaults(cacheConfiguration).build();

    }

问题2:版本不一致,导致无法序列化?

解决:

在springboot1.0 和springboot2.0 中默认的序列化都是使用的jdk的 Serializer  实现这个接口,jdk自带的序列化方法

在springboot1.0中如果向自定义我们呢直接创建cachemanager 然后传入redistemple模板对象, 就可以了, redistemple 模板对象中定制序列化的方式

    @Bean
    public RedisTemplate<Object, Employee> empRedisTemplate(
            RedisConnectionFactory redisConnectionFactory)
            throws UnknownHostException {
        RedisTemplate<Object, Employee> template = new RedisTemplate<Object, Employee>();
        template.setConnectionFactory(redisConnectionFactory);
        Jackson2JsonRedisSerializer<Employee> ser = new Jackson2JsonRedisSerializer<Employee>(Employee.class);
        template.setDefaultSerializer(ser);
        return template;
    }
    @Bean
    public RedisCacheManager employeeCacheManager(RedisTemplate<Object, Employee> empRedisTemplate){
        RedisCacheManager cacheManager = new RedisCacheManager(empRedisTemplate);
        //key多了一个前缀
 
        //使用前缀,默认会将CacheName作为key的前缀
        cacheManager.setUsePrefix(true);
 
        return cacheManager;
    }

springboot2.0 中,使用rediscachemanager 就可以了

 @Bean
    public RedisCacheManager empoyeeCacheManager(RedisConnectionFactory factory) {
        RedisCacheConfiguration cacheConfiguration =
                RedisCacheConfiguration.defaultCacheConfig()
                        .entryTtl(Duration.ofDays(1)) //失效时间
                        .disableCachingNullValues()   //序列化
                        .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new
                                GenericJackson2JsonRedisSerializer()));
        return RedisCacheManager.builder(factory).cacheDefaults(cacheConfiguration).build();

    }
posted @ 2020-06-04 14:48  trueAndFalse  阅读(322)  评论(0编辑  收藏  举报