Redis08_SpringBoot与Redis整合

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:
在这里插入图片描述
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"));	

}

在这里插入图片描述


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

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转载自blog.csdn.net/BLU_111/article/details/108329753