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mysql plus缓存,Mybatis-Plus 二级缓存

谢泉
2023-12-01

@CacheNamespace(implementation = MybatisEhcacheCache.class)

一、导入依赖

org.mybatis.caches

mybatis-ehcache

1.1.0

org.springframework.boot

spring-boot-starter-data-redis

org.apache.commons

commons-pool2

完整的 pom<?xml version="1.0" encoding="UTF-8"?>

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">

4.0.0

org.springframework.boot

spring-boot-starter-parent

2.3.4.RELEASE

com.xxtsoft

call-center

0.0.1-SNAPSHOT

call-center

信讯通呼叫中心标准版

1.8

org.springframework.boot

spring-boot-starter-thymeleaf

org.thymeleaf.extras

thymeleaf-extras-springsecurity5

org.springframework.boot

spring-boot-starter

org.springframework.boot

spring-boot-starter-web

org.springframework.boot

spring-boot-devtools

runtime

mysql

mysql-connector-java

runtime

org.springframework.boot

spring-boot-configuration-processor

true

org.projectlombok

lombok

true

org.springframework.boot

spring-boot-starter-test

test

org.junit.vintage

junit-vintage-engine

org.springframework.boot

spring-boot-starter-security

org.springframework.boot

spring-boot-starter-validation

com.baomidou

mybatis-plus-boot-starter

3.4.0

com.baomidou

mybatis-plus-generator

3.4.0

org.freemarker

freemarker

2.3.30

cn.hutool

hutool-all

5.4.4

com.alibaba

fastjson

1.2.73

io.springfox

springfox-swagger2

2.9.2

io.springfox

springfox-swagger-ui

2.9.2

org.apache.poi

poi-ooxml

4.1.1

poi-ooxml-schemas

org.apache.poi

org.apache.poi

poi-ooxml-schemas

3.17

org.apache.commons

commons-lang3

3.11

junit

junit

test

org.webjars

webjars-locator

0.34

org.webjars

jquery

2.1.4

org.webjars

bootstrap

3.3.6

jquery

org.webjars

org.webjars

font-awesome

4.4.0

org.webjars.npm

animate.css

4.1.1

org.webjars.bower

bootstrap-table

1.14.1

org.webjars

zTree

3.5.18

jquery

org.webjars

org.webjars.npm

bootstrap-select

1.13.14

org.webjars.bower

metisMenu

1.1.3

org.webjars.bower

bootstrap

org.webjars

jQuery-slimScroll

1.3.1

jquery

org.webjars

org.webjars

pace

1.0.2

org.webjars

jquery-cookie

1.4.1

jquery

org.webjars

org.mybatis.caches

mybatis-ehcache

1.1.0

org.springframework.boot

spring-boot-starter-data-redis

org.apache.commons

commons-pool2

org.webjars.bower

jquery.serializeJSON

2.6.1

org.webjars

echarts

2.1.10

org.webjars

layui

2.5.6

org.webjars.bowergithub.sentsin

layer

3.1.1

org.webjars

vue

2.6.11

org.webjars.npm

axios

0.20.0

org.webjars.npm

element-ui

2.14.0

org.springframework.boot

spring-boot-maven-plugin

org.apache.maven.plugins

maven-surefire-plugin

2.12.4

-Xmx1024m

二、设置配置文件 application.yml# 连接数据库

spring:

datasource:

driverClassName: com.mysql.cj.jdbc.Driver

url: jdbc:mysql://192.168.6.250:3306/call_center?sserverTimezone=GMT%2B8&useUnicode=true&characterEncoding=utf-8

# url: jdbc:mysql://10.8.0.142:3306/call_center?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8

username: root

password: XXT123456.

devtools:

restart:

# spring boot devtools 热部署后访问报 404 问题

# https://www.jianshu.com/p/9337fd517291

poll-interval: 3000ms

quiet-period: 2999ms

# 配置 redis 缓存

redis:

# host: 10.8.0.142

host: 192.168.6.250

port: 6379

password: XXT123456.

database: 1

timeout: 2000ms

# 连接超时时间(毫秒)默认是2000ms

lettuce:

pool:

max-active: 200

# 连接池最大连接数(使用负值表示没有限制)

max-wait: -1ms

# 连接池最大阻塞等待时间(使用负值表示没有限制)

max-idle: 100

# 连接池中的最大空闲连接

min-idle: 50

# 连接池中的最小空闲连接

shutdown-timeout: 100ms

# MyBatis plus 显示 SQL 语句

mybatis-plus:

configuration:

log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

# 使用缓存

cache-enabled: true

# ===================================================================

# 日志配置 从低到高

# log.trace("trace");

# log.debug("debug");

# log.info("info");

# log.warn("warn");

# log.error("error");

# ===================================================================

logging:

# 对 com.xxtsoft 下的文件开启 trace 级别的日志

level:

com:

xxtsoft: trace

server:

port: 8081

servlet:

context-path: /call

三、创建 RedisUtil 封装 RedisTemplateRedisTemplatepackage com.xxtsoft.util.redis;

import cn.hutool.core.collection.ListUtil;

import cn.hutool.core.lang.Validator;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.data.redis.core.RedisTemplate;

import org.springframework.data.redis.core.StringRedisTemplate;

import org.springframework.stereotype.Component;

import java.util.List;

import java.util.Map;

import java.util.Set;

import java.util.concurrent.TimeUnit;

/**

* redis 工具类

*

* @author yang

*/

@Component

public class RedisUtil {

@Autowired

private RedisTemplate redisTemplate;

@Autowired

private StringRedisTemplate stringRedisTemplate;

/**

* 指定缓存失效时间

*

* @param key 键

* @param time 时间(秒)

* @return boolean

*/

public boolean expire(String key, long time) {

try {

if (time > 0) {

redisTemplate.expire(key, time, TimeUnit.SECONDS);

}

return true;

} catch (Exception e) {

e.printStackTrace();

return false;

}

}

/**

* 根据key 获取过期时间

*

* @param key 键 不能为null

* @return 时间(秒) 返回0代表为永久有效

*/

public Long getExpire(String key) {

final Long expire = redisTemplate.getExpire(key, TimeUnit.SECONDS);

assert expire != null;

return expire;

}

/**

* 判断key是否存在

*

* @param key 键

* @return true 存在 false不存在

*/

public Boolean hasKey(String key) {

try {

final Boolean aBoolean = redisTemplate.hasKey(key);

assert aBoolean != null;

return aBoolean;

} catch (Exception e) {

e.printStackTrace();

return false;

}

}

/**

* 删除缓存

*

* @param key 可以传一个值 或多个

*/

public void del(String... key) {

if (Validator.isNotNull(key) && Validator.isTrue(key.length > 0)) {

if (key.length == 1) {

redisTemplate.delete(key[0]);

} else {

redisTemplate.delete(ListUtil.toList(key));

}

}

}

// ============================String=============================

/**

* 普通缓存获取

*

* @param key 键

* @return 值

*/

public Object get(String key) {

return key == null ? null : redisTemplate.opsForValue().get(key);

}

/**

* 普通缓存放入

*

* @param key 键

* @param value 值

* @return true成功 false失败

*/

public Boolean set(String key, Object value) {

try {

redisTemplate.opsForValue().set(key, value);

return true;

} catch (Exception e) {

e.printStackTrace();

return false;

}

}

/**

* 普通缓存放入并设置时间

*

* @param key 键

* @param value 值

* @param time 时间(秒) time要大于0 如果time小于等于0 将设置无限期

* @return true成功 false 失败

*/

public boolean set(String key, Object value, long time) {

try {

if (time > 0) {

redisTemplate.opsForValue().set(key, value, time, TimeUnit.SECONDS);

} else {

set(key, value);

}

return true;

} catch (Exception e) {

e.printStackTrace();

return false;

}

}

/**

* 递增

*

* @param key 键

* @param delta 要增加几(大于0)

* @return long

*/

public Long incr(String key, long delta) {

if (delta < 0) {

throw new RuntimeException("递增因子必须大于0");

}

return redisTemplate.opsForValue().increment(key, delta);

}

/**

* 递减

*

* @param key 键

* @param delta 要减少几(大于0)

* @return long

*/

public Long decr(String key, long delta) {

if (delta < 0) {

throw new RuntimeException("递减因子必须大于0");

}

return redisTemplate.opsForValue().increment(key, -delta);

}

// ================================Map=================================

/**

* HashGet

*

* @param key 键 不能为null

* @param item 项 不能为null

* @return 值

*/

public Object hget(String key, String item) {

return redisTemplate.opsForHash().get(key, item);

}

/**

* 获取hashKey对应的所有键值

*

* @param key 键

* @return 对应的多个键值

*/

public Map hmget(String key) {

return redisTemplate.opsForHash().entries(key);

}

/**

* HashSet

*

* @param key 键

* @param map 对应多个键值

* @return true 成功 false 失败

*/

public boolean hmset(String key, Map map) {

try {

redisTemplate.opsForHash().putAll(key, map);

return true;

} catch (Exception e) {

e.printStackTrace();

return false;

}

}

/**

* HashSet 并设置时间

*

* @param key 键

* @param map 对应多个键值

* @param time 时间(秒)

* @return true成功 false失败

*/

public boolean hmset(String key, Map map, long time) {

try {

redisTemplate.opsForHash().putAll(key, map);

if (time > 0) {

expire(key, time);

}

return true;

} catch (Exception e) {

e.printStackTrace();

return false;

}

}

/**

* 向一张hash表中放入数据,如果不存在将创建

*

* @param key 键

* @param item 项

* @param value 值

* @return true 成功 false失败

*/

public boolean hset(String key, String item, Object value) {

try {

redisTemplate.opsForHash().put(key, item, value);

return true;

} catch (Exception e) {

e.printStackTrace();

return false;

}

}

/**

* 向一张hash表中放入数据,如果不存在将创建

*

* @param key 键

* @param item 项

* @param value 值

* @param time 时间(秒) 注意:如果已存在的hash表有时间,这里将会替换原有的时间

* @return true 成功 false失败

*/

public boolean hset(String key, String item, Object value, long time) {

try {

redisTemplate.opsForHash().put(key, item, value);

if (time > 0) {

expire(key, time);

}

return true;

} catch (Exception e) {

e.printStackTrace();

return false;

}

}

/**

* 删除hash表中的值

*

* @param key 键 不能为null

* @param item 项 可以使多个 不能为null

*/

public Object hdel(String key, Object... item) {

return redisTemplate.opsForHash().delete(key, item);

}

/**

* 判断hash表中是否有该项的值

*

* @param key 键 不能为null

* @param item 项 不能为null

* @return true 存在 false不存在

*/

public boolean hHasKey(String key, String item) {

return redisTemplate.opsForHash().hasKey(key, item);

}

/**

* hash递增 如果不存在,就会创建一个 并把新增后的值返回

*

* @param key 键

* @param item 项

* @param by 要增加几(大于0)

* @return 新增后的值

*/

public Double hincr(String key, String item, double by) {

return redisTemplate.opsForHash().increment(key, item, by);

}

/**

* hash递减

*

* @param key 键

* @param item 项

* @param by 要减少记(小于0)

* @return 新减后的值

*/

public double hdecr(String key, String item, double by) {

return redisTemplate.opsForHash().increment(key, item, -by);

}

/**

* hash 键数量

*

* @param key key

* @return int

*/

public int hsize(String key) {

return redisTemplate.opsForHash().size(key).intValue();

}

// ============================set=============================

/**

* 根据 key 获取 Set 中的所有值

*

* @param key 键

* @return 所有值

*/

public Set sGet(String key) {

try {

return redisTemplate.opsForSet().members(key);

} catch (Exception e) {

e.printStackTrace();

return null;

}

}

/**

* 根据value从一个set中查询,是否存在

*

* @param key 键

* @param value 值

* @return true 存在 false不存在

*/

public boolean sHasKey(String key, Object value) {

try {

final Boolean member = redisTemplate.opsForSet().isMember(key, value);

assert member != null;

return member;

} catch (Exception e) {

e.printStackTrace();

return false;

}

}

/**

* 将数据放入set缓存

*

* @param key 键

* @param values 值 可以是多个

* @return 成功个数

*/

public long sSet(String key, Object... values) {

try {

final Long add = redisTemplate.opsForSet().add(key, values);

assert add != null;

return add;

} catch (Exception e) {

e.printStackTrace();

return 0;

}

}

/**

* 将 set 数据放入缓存

*

* @param key 键

* @param time 时间(秒)

* @param values 值 可以是多个

* @return 成功个数

*/

public Long sSetAndTime(String key, long time, Object... values) {

try {

Long count = redisTemplate.opsForSet().add(key, values);

if (time > 0) {

expire(key, time);

}

return count;

} catch (Exception e) {

e.printStackTrace();

return 0L;

}

}

/**

* 获取 set 缓存的长度

*

* @param key 键

* @return set 缓存的长度

*/

public long sGetSetSize(String key) {

try {

final Long size = redisTemplate.opsForSet().size(key);

assert size != null;

return size;

} catch (Exception e) {

e.printStackTrace();

return 0;

}

}

/**

* 移除值为value的

*

* @param key 键

* @param values 值 可以是多个

* @return 移除的个数

*/

public long setRemove(String key, Object... values) {

try {

Long count = redisTemplate.opsForSet().remove(key, values);

assert count != null;

return count;

} catch (Exception e) {

e.printStackTrace();

return 0;

}

}

// ===============================list=================================

/**

* 获取 list 缓存的内容

*

* @param key 键

* @param start 开始

* @param end 结束 0 到 -1代表所有值

* @return 缓存的内容

*/

public List lGet(String key, long start, long end) {

try {

return redisTemplate.opsForList().range(key, start, end);

} catch (Exception e) {

e.printStackTrace();

return null;

}

}

/**

* 获取 list 缓存的长度

*

* @param key 键

* @return 缓存的长度

*/

public long lGetListSize(String key) {

try {

final Long size = redisTemplate.opsForList().size(key);

assert size != null;

return size;

} catch (Exception e) {

e.printStackTrace();

return 0;

}

}

/**

* 通过索引 获取 list 中的值

*

* @param key 键

* @param index 索引 index>=0时, 0 表头,1 第二个元素,依次类推;index<0时,-1,表尾,-2倒数第二个元素,依次类推

* @return list 中的值

*/

public Object lGetIndex(String key, long index) {

try {

return redisTemplate.opsForList().index(key, index);

} catch (Exception e) {

e.printStackTrace();

return null;

}

}

/**

* 将 list 放入缓存

*

* @param key 键

* @param value 值

* @return 是否成功

*/

public boolean lSet(String key, Object value) {

try {

redisTemplate.opsForList().rightPush(key, value);

return true;

} catch (Exception e) {

e.printStackTrace();

return false;

}

}

/**

* 将 list 放入缓存

*

* @param key 键

* @param value 值

* @param time 时间(秒)

* @return boolean

*/

public boolean lSet(String key, Object value, long time) {

try {

redisTemplate.opsForList().rightPush(key, value);

if (time > 0) {

expire(key, time);

}

return true;

} catch (Exception e) {

e.printStackTrace();

return false;

}

}

/**

* 将 list 放入缓存

*

* @param key 键

* @param value 值

* @return boolean

*/

public boolean lSet(String key, List value) {

try {

redisTemplate.opsForList().rightPushAll(key, value);

return true;

} catch (Exception e) {

e.printStackTrace();

return false;

}

}

/**

* 将list放入缓存

*

* @param key 键

* @param value 值

* @param time 时间(秒)

* @return boolean

*/

public boolean lSet(String key, List value, long time) {

try {

redisTemplate.opsForList().rightPushAll(key, value);

if (time > 0) {

expire(key, time);

}

return true;

} catch (Exception e) {

e.printStackTrace();

return false;

}

}

/**

* 根据索引修改 list 中的某条数据

*

* @param key 键

* @param index 索引

* @param value 值

* @return boolean

*/

public boolean lUpdateIndex(String key, long index, Object value) {

try {

redisTemplate.opsForList().set(key, index, value);

return true;

} catch (Exception e) {

e.printStackTrace();

return false;

}

}

/**

* 移除N个值为value

*

* @param key 键

* @param count 移除多少个

* @param value 值

* @return 移除的个数

*/

public long lRemove(String key, long count, Object value) {

try {

Long remove = redisTemplate.opsForList().remove(key, count, value);

assert remove != null;

return remove;

} catch (Exception e) {

e.printStackTrace();

return 0;

}

}

// ===============================sorted set 有序集合=================================

/**

* 添加一个元素

*

* @param key 键

* @param value 值

* @param score 分值

*/

public void zAdd(String key, Object value, double score) {

redisTemplate.opsForZSet().add(key, value, score);

}

/**

* 返回有序集中,成员的分数值

*

* @param key 键

* @param value 值

* @return 成员的分数值

*/

public double zScore(String key, Object value) {

Double d = redisTemplate.opsForZSet().score(key, value);

d = d == null ? 0L : d;

return d;

}

/**

* 判断 value 在 zset 中的排名

*

* @param key 键

* @param value 值

* @return 排名

*/

public Long zRank(String key, Object value) {

Long index = redisTemplate.opsForZSet().rank(key, value);

index = index == null ? 0L : index;

return index;

}

/**

* 查询 集合中 指定顺序 的 值 和 score

*

* (start=0 & end = -1)表示获取全部的集合内容

*

* @param key 键

* @param start 开始

* @param end 结束

* @return 全部的集合内容

*/

public Set zRangeWithScore(String key, long start, long end) {

return redisTemplate.opsForZSet().rangeByScore(key, start, end);

}

}

四、SpringContextUtils :维护 Spring 中的实例package com.xxtsoft.util.spring;

import org.springframework.beans.BeansException;

import org.springframework.context.ApplicationContext;

import org.springframework.context.ApplicationContextAware;

import org.springframework.stereotype.Component;

import org.springframework.web.context.request.RequestContextHolder;

import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

import java.util.Objects;

/**

* Spring 工具类

*

* @author yang

*/

@Component

public class SpringContextUtils implements ApplicationContextAware {

/**

* 上下文对象实例

*/

private static ApplicationContext applicationContext;

@Override

public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {

SpringContextUtils.applicationContext = applicationContext;

}

/**

* 获取applicationContext

*

* @return 获取applicationContext

*/

public static ApplicationContext getApplicationContext() {

return applicationContext;

}

/**

* 获取HttpServletRequest

*/

public static HttpServletRequest getHttpServletRequest() {

return ((ServletRequestAttributes) Objects.requireNonNull(RequestContextHolder.getRequestAttributes())).getRequest();

}

public static String getDomain() {

HttpServletRequest request = getHttpServletRequest();

StringBuffer url = request.getRequestURL();

return url.delete(url.length() - request.getRequestURI().length(), url.length()).toString();

}

public static String getOrigin() {

HttpServletRequest request = getHttpServletRequest();

return request.getHeader("Origin");

}

/**

* 通过name获取 Bean.

*

* @param name name

* @return Bean

*/

public static Object getBean(String name) {

return getApplicationContext().getBean(name);

}

/**

* 通过class获取Bean.

*

* @param clazz 类

* @param 类型

* @return bean

*/

public static T getBean(Class clazz) {

return getApplicationContext().getBean(clazz);

}

/**

* 通过name,以及Clazz返回指定的Bean

*

* @param name 名字

* @param clazz 类

* @param 类型

* @return bean

*/

public static T getBean(String name, Class clazz) {

return getApplicationContext().getBean(name, clazz);

}

}

五、RedisConfig :配置Redis 的 RedisTemplate 和 CacheManager 并载入 Spring IOC 容器package com.xxtsoft.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;

import com.fasterxml.jackson.annotation.PropertyAccessor;

import com.fasterxml.jackson.databind.ObjectMapper;

import com.fasterxml.jackson.databind.ObjectMapper.DefaultTyping;

import com.fasterxml.jackson.databind.SerializationFeature;

import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;

import org.springframework.cache.CacheManager;

import org.springframework.cache.annotation.CachingConfigurerSupport;

import org.springframework.cache.annotation.EnableCaching;

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.cache.RedisCacheWriter;

import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;

import org.springframework.data.redis.core.RedisTemplate;

import org.springframework.data.redis.serializer.*;

import javax.annotation.Resource;

import java.time.Duration;

import static java.util.Collections.singletonMap;

/**

* redis 配置类

*

* @author yang

*/

@Configuration

@EnableCaching

public class RedisConfig extends CachingConfigurerSupport {

@Resource

private LettuceConnectionFactory lettuceConnectionFactory;

/**

* RedisTemplate 配置

*

* @param lettuceConnectionFactory lettuceConnectionFactory

* @return RedisTemplate

*/

@Bean

public RedisTemplate redisTemplate(LettuceConnectionFactory lettuceConnectionFactory) {

// 设置序列化

Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);

ObjectMapper om = new ObjectMapper();

om.setVisibility(PropertyAccessor.ALL, Visibility.ANY);

om.enableDefaultTyping(DefaultTyping.NON_FINAL);

// 解决jackson2无法反序列化LocalDateTime的问题

om.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);

om.registerModule(new JavaTimeModule());

jackson2JsonRedisSerializer.setObjectMapper(om);

// 配置redisTemplate

RedisTemplate redisTemplate = new RedisTemplate();

redisTemplate.setConnectionFactory(lettuceConnectionFactory);

RedisSerializer> stringSerializer = new StringRedisSerializer();

// key序列化

redisTemplate.setKeySerializer(stringSerializer);

// value序列化

redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);

// Hash key序列化

redisTemplate.setHashKeySerializer(stringSerializer);

// Hash value序列化

redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);

redisTemplate.afterPropertiesSet();

return redisTemplate;

}

/**

* 缓存配置管理器

*

* @param factory factory

* @return CacheManager

*/

@Bean

public CacheManager cacheManager(LettuceConnectionFactory factory) {

// 配置序列化(缓存默认有效期 6小时)

RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofHours(6));

RedisCacheConfiguration redisCacheConfiguration = config.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()))

.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()));

/* 自定义配置test:demo 的超时时间为 5分钟*/

return RedisCacheManager

.builder(RedisCacheWriter.lockingRedisCacheWriter(factory))

.cacheDefaults(redisCacheConfiguration)

.withInitialCacheConfigurations(singletonMap("test:demo", RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofMinutes(5)).disableCachingNullValues()))

.transactionAware()

.build();

}

}

六、创建 MybatisRedisCache 实现 org.apache.ibatis.cache.Cachepackage com.xxtsoft.config;

import cn.hutool.extra.spring.SpringUtil;

import com.xxtsoft.util.redis.RedisUtil;

import lombok.Setter;

import org.apache.ibatis.cache.Cache;

import org.springframework.stereotype.Component;

import java.util.concurrent.locks.ReadWriteLock;

import java.util.concurrent.locks.ReentrantReadWriteLock;

/**

* 缓存实现类

*

* @author 杨磊

*/

@Component

public class MybatisRedisCache implements Cache {

private RedisUtil redisUtil;

private RedisUtil getRedis() {

return SpringUtil.getBean(RedisUtil.class);

}

private final ReadWriteLock readWriteLock = new ReentrantReadWriteLock();

/**

* 缓存刷新时间(秒)

*/

@Setter

private long flushInterval = 0L;

private String id;

public MybatisRedisCache() {

}

public MybatisRedisCache(final String id) {

if (id == null) {

throw new IllegalArgumentException("Cache instances require an ID");

}

this.id = id;

}

@Override

public String getId() {

return this.id;

}

@Override

public void putObject(Object o, Object o1) {

getRedis().hset(getId(), o.toString(), o1);

if (flushInterval > 0L) {

getRedis().expire(getId(), flushInterval);

}

}

@Override

public Object getObject(Object o) {

return getRedis().hget(getId(), o.toString());

}

@Override

public Object removeObject(Object o) {

return getRedis().hdel(getId(), o);

}

@Override

public void clear() {

getRedis().del(getId());

}

@Override

public int getSize() {

return getRedis().hsize(getId());

}

@Override

public ReadWriteLock getReadWriteLock() {

return readWriteLock;

}

}

七、添加 缓存注解

Mybatis 支持两种方式添加缓存注解,以下方案二选一即可:添加缓存注解 @CacheNamespace

在代码中为每个 mapper 添加缓存注解,声明 implementation 或 eviction 的值为 MybatisRedisCache@CacheNamespace(implementation = MybatisRedisCache.class,eviction=MybatisRedisCache.class)

public interface UserMapper extends BaseMapper {

}在对应的 mapper.xml 中将原有注释修改为链接式声明,以保证 xml 文件里的缓存能够正常

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