Redis08_SpringBoot与Redis整合
RedisAutoConfiguration 源码分析:
/**
* @ConditionalOnMissingBean(name = "redisTemplate")
* 这个注解表示如果name为“redisTemplate”的bean已存在,则该注解修饰的代码块不执行。
* 所以我们可以自定义一个RedisTemplate来替换该默认配置
*
* 两个泛型都是Object类型,所以我们使用需要强制转换:<String, Object>
**/
@Bean
@ConditionalOnMissingBean(name = "redisTemplate")
public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory)
throws UnknownHostException {
RedisTemplate<Object, Object> template = new RedisTemplate<>();
template.setConnectionFactory(redisConnectionFactory);
return template;
}
/**
* 因为 String 类型是Redis最常使用的类型,所以单独提出来了一个 StringRedisTemplate bean
*
**/
@Bean
@ConditionalOnMissingBean
public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory redisConnectionFactory)
throws UnknownHostException {
StringRedisTemplate template = new StringRedisTemplate();
template.setConnectionFactory(redisConnectionFactory);
return template;
}
依赖:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.blu</groupId>
<artifactId>springboot-redis-01</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>springboot-redis-01</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
配置:
spring.redis.host=127.0.0.1
spring.redis.port=6379
测试:
@SpringBootTest
class SpringbootRedis01ApplicationTests {
@Autowired
private RedisTemplate<Object, Object> redisTemplate;
@Test
void contextLoads() {
RedisConnection connection = redisTemplate.getConnectionFactory().getConnection();
connection.flushDb();
redisTemplate.opsForValue().set("name", "BLU");
Object object = redisTemplate.opsForValue().get("name");
System.out.println(object.toString());
redisTemplate.opsForList().leftPush("mylist", "a");
redisTemplate.opsForList().leftPush("mylist", "b");
List<Object> list = redisTemplate.opsForList().range("mylist", 0, -1);
for(Object o : list) {
System.out.println(o);
}
}
}
BLU
b
a
实体类(需要序列化):
@Component
@AllArgsConstructor
@NoArgsConstructor
@Data
public class User implements Serializable{
private String name;
private int age;
}
@Autowired
private RedisTemplate<Object, Object> redisTemplate;
@Test
public void test() throws JsonProcessingException {
RedisConnection connection = redisTemplate.getConnectionFactory().getConnection();
connection.flushDb();
User user = new User("BLU",3);
redisTemplate.opsForValue().set("user",user);
System.out.println(redisTemplate.opsForValue().get("user"));
}
User(name=BLU, age=3)
问题:
解决(自定义一个 RedisTemplate):
@Configuration
public class RedisConfig {
/**
* 自定义一个RedisTemplate
*/
@Bean
public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory)
throws UnknownHostException {
RedisTemplate<String, Object> template = new RedisTemplate<String,Object>();
template.setConnectionFactory(redisConnectionFactory);
Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
ObjectMapper om = new ObjectMapper();
om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
jackson2JsonRedisSerializer.setObjectMapper(om);
StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
template.setKeySerializer(stringRedisSerializer);
template.setHashKeySerializer(stringRedisSerializer);
template.setValueSerializer(jackson2JsonRedisSerializer);
template.setHashValueSerializer(jackson2JsonRedisSerializer);
template.afterPropertiesSet();
return template;
}
}
@Autowired
private RedisTemplate<String, Object> redisTemplate;
@Test
public void test() throws JsonProcessingException {
RedisConnection connection = redisTemplate.getConnectionFactory().getConnection();
connection.flushDb();
User user = new User("BLU",3);
redisTemplate.opsForValue().set("user",user);
System.out.println(redisTemplate.opsForValue().get("user"));
}
RedisUtils工具类:
package com.blu.utils;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;
@Component
public final class RedisUtils {
@Autowired
private RedisTemplate<String, Object> redisTemplate;
// =============================common============================
/**
* 26
* 指定缓存失效时间
* 27
*
* @param key 键
* 28
* @param time 时间(秒)
* 29
* @return 30
*/
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;
}
}
/**
* 44
* 根据key 获取过期时间
* 45
*
* @param key 键 不能为null
* 46
* @return 时间(秒) 返回0代表为永久有效
* 47
*/
public long getExpire(String key) {
return redisTemplate.getExpire(key, TimeUnit.SECONDS);
}
/**
* 53
* 判断key是否存在
* 54
*
* @param key 键
* 55
* @return true 存在 false不存在
* 56
*/
public boolean hasKey(String key) {
try {
return redisTemplate.hasKey(key);
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 67
* 删除缓存
* 68
*
* @param key 可以传一个值 或多个
* 69
*/
@SuppressWarnings("unchecked")
public void del(String... key) {
if (key != null && key.length > 0) {
if (key.length == 1) {
redisTemplate.delete(key[0]);
} else {
redisTemplate.delete(CollectionUtils.arrayToList(key));
}
}
}
// ============================String=============================
/**
* 83
* 普通缓存获取
* 84
*
* @param key 键
* 85
* @return 值
* 86
*/
public Object get(String key) {
return key == null ? null : redisTemplate.opsForValue().get(key);
}
/**
* 92
* 普通缓存放入
* 93
*
* @param key 键
* 94
* @param value 值
* 95
* @return true成功 false失败
* 96
*/
public boolean set(String key, Object value) {
try {
redisTemplate.opsForValue().set(key, value);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 109
* 普通缓存放入并设置时间
* 110
*
* @param key 键
* 111
* @param value 值
* 112
* @param time 时间(秒) time要大于0 如果time小于等于0 将设置无限期
* 113
* @return true成功 false 失败
* 114
*/
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;
}
}
/**
* 130
* 递增
* 131
*
* @param key 键
* 132
* @param delta 要增加几(大于0)
* 133
* @return 134
*/
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);
}
/**
* 143
* 递减
* 144
*
* @param key 键
* 145
* @param delta 要减少几(小于0)
* 146
* @return 147
*/
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=================================
/**
* 157
* HashGet
* 158
*
* @param key 键 不能为null
* 159
* @param item 项 不能为null
* 160
* @return 值
* 161
*/
public Object hget(String key, String item) {
return redisTemplate.opsForHash().get(key, item);
}
/**
* 167
* 获取hashKey对应的所有键值
* 168
*
* @param key 键
* 169
* @return 对应的多个键值
* 170
*/
public Map<Object, Object> hmget(String key) {
return redisTemplate.opsForHash().entries(key);
}
/**
* 176
* HashSet
* 177
*
* @param key 键
* 178
* @param map 对应多个键值
* 179
* @return true 成功 false 失败
* 180
*/
public boolean hmset(String key, Map<String, Object> map) {
try {
redisTemplate.opsForHash().putAll(key, map);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 192
* HashSet 并设置时间
* 193
*
* @param key 键
* 194
* @param map 对应多个键值
* 195
* @param time 时间(秒)
* 196
* @return true成功 false失败
* 197
*/
public boolean hmset(String key, Map<String, Object> map, long time) {
try {
redisTemplate.opsForHash().putAll(key, map);
if (time > 0) {
expire(key, time);
}
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 212
* 向一张hash表中放入数据,如果不存在将创建
* 213
*
* @param key 键
* 214
* @param item 项
* 215
* @param value 值
* 216
* @return true 成功 false失败
* 217
*/
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;
}
}
/**
* 229
* 向一张hash表中放入数据,如果不存在将创建
* 230
*
* @param key 键
* 231
* @param item 项
* 232
* @param value 值
* 233
* @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
* 234
* @return true 成功 false失败
* 235
*/
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;
}
}
/**
* 250
* 删除hash表中的值
* 251
*
* @param key 键 不能为null
* 252
* @param item 项 可以使多个 不能为null
* 253
*/
public void hdel(String key, Object... item) {
redisTemplate.opsForHash().delete(key, item);
}
/**
* 259
* 判断hash表中是否有该项的值
* 260
*
* @param key 键 不能为null
* 261
* @param item 项 不能为null
* 262
* @return true 存在 false不存在
* 263
*/
public boolean hHasKey(String key, String item) {
return redisTemplate.opsForHash().hasKey(key, item);
}
/**
* 269
* hash递增 如果不存在,就会创建一个 并把新增后的值返回
* 270
*
* @param key 键
* 271
* @param item 项
* 272
* @param by 要增加几(大于0)
* 273
* @return 274
*/
public double hincr(String key, String item, double by) {
return redisTemplate.opsForHash().increment(key, item, by);
}
/**
* 280
* hash递减
* 281
*
* @param key 键
* 282
* @param item 项
* 283
* @param by 要减少记(小于0)
* 284
* @return 285
*/
public double hdecr(String key, String item, double by) {
return redisTemplate.opsForHash().increment(key, item, -by);
}
// ============================set=============================
/**
* 292
* 根据key获取Set中的所有值
* 293
*
* @param key 键
* 294
* @return 295
*/
public Set<Object> sGet(String key) {
try {
return redisTemplate.opsForSet().members(key);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* 306
* 根据value从一个set中查询,是否存在
* 307
*
* @param key 键
* 308
* @param value 值
* 309
* @return true 存在 false不存在
* 310
*/
public boolean sHasKey(String key, Object value) {
try {
return redisTemplate.opsForSet().isMember(key, value);
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 321
* 将数据放入set缓存
* 322
*
* @param key 键
* 323
* @param values 值 可以是多个
* 324
* @return 成功个数
* 325
*/
public long sSet(String key, Object... values) {
try {
return redisTemplate.opsForSet().add(key, values);
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
/**
* 336
* 将set数据放入缓存
* 337
*
* @param key 键
* 338
* @param time 时间(秒)
* 339
* @param values 值 可以是多个
* 340
* @return 成功个数
* 341
*/
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 0;
}
}
/**
* 355
* 获取set缓存的长度
* 356
*
* @param key 键
* 357
* @return 358
*/
public long sGetSetSize(String key) {
try {
return redisTemplate.opsForSet().size(key);
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
/**
* 369
* 移除值为value的
* 370
*
* @param key 键
* 371
* @param values 值 可以是多个
* 372
* @return 移除的个数
* 373
*/
public long setRemove(String key, Object... values) {
try {
Long count = redisTemplate.opsForSet().remove(key, values);
return count;
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
// ===============================list=================================
/**
* 386
* 获取list缓存的内容
* 387
*
* @param key 键
* 388
* @param start 开始
* 389
* @param end 结束 0 到 -1代表所有值
* 390
* @return 391
*/
public List<Object> lGet(String key, long start, long end) {
try {
return redisTemplate.opsForList().range(key, start, end);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* 402
* 获取list缓存的长度
* 403
*
* @param key 键
* 404
* @return 405
*/
public long lGetListSize(String key) {
try {
return redisTemplate.opsForList().size(key);
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
/**
* 416
* 通过索引 获取list中的值
* 417
*
* @param key 键
* 418
* @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
* 419
* @return 420
*/
public Object lGetIndex(String key, long index) {
try {
return redisTemplate.opsForList().index(key, index);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* 431
* 将list放入缓存
* 432
*
* @param key 键
* 433
* @param value 值
* 434
* @param time 时间(秒)
* 435
* @return 436
*/
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
*/
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;
}
}
/**
* 467
* 将list放入缓存
* 468
*
* @param key 键
* 469
* @param value 值
* 470
* @param time 时间(秒)
* 471
* @return 472
*/
public boolean lSet(String key, List<Object> value) {
try {
redisTemplate.opsForList().rightPushAll(key, value);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 484
* 将list放入缓存
* 485
* <p>
* 486
*
* @param key 键
* 487
* @param value 值
* 488
* @param time 时间(秒)
* 489
* @return 490
*/
public boolean lSet(String key, List<Object> value, long time) {
try {
redisTemplate.opsForList().rightPushAll(key, value);
if (time > 0)
expire(key, time);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 504
* 根据索引修改list中的某条数据
* 505
*
* @param key 键
* 506
* @param index 索引
* 507
* @param value 值
* 508
* @return 509
*/
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;
}
}
/**
* 521
* 移除N个值为value
* 522
*
* @param key 键
* 523
* @param count 移除多少个
* 524
* @param value 值
* 525
* @return 移除的个数
* 526
*/
public long lRemove(String key, long count, Object value) {
try {
Long remove = redisTemplate.opsForList().remove(key, count, value);
return remove;
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
}
测试使用工具类:
@Autowired
private RedisUtils redisUtils;
@Test
void test() {
redisUtils.set("name", "BLU");
System.out.println(redisUtils.get("name"));
}
BLU