《Spring Boot系列》- NoSql数据库(Redis)-优快云博客

本文介绍如何在Spring Boot项目中整合Redis，并提供了一个具体的示例。包括配置Redis连接、设置序列化方式以及通过测试类演示如何存储和读取字符串与自定义对象。

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项目结构

引入依赖

apply plugin:'java'

repositories{
	maven{
		url 'http://maven.aliyun.com/nexus/content/groups/public/'
	}
}

dependencies{
	compile group: 'org.springframework.boot', name: 'spring-boot-starter', version: '1.4.2.RELEASE'
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-test', version: '1.4.2.RELEASE'
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-data-redis', version: '1.4.2.RELEASE'
}

配置属性文件

# REDIS (RedisProperties)
# Redis数据库索引（默认为0）
spring.redis.database=0
# Redis服务器地址
spring.redis.host=localhost
# Redis服务器连接端口
spring.redis.port=6379
# Redis服务器连接密码（默认为空）
spring.redis.password=
# 连接池最大连接数（使用负值表示没有限制）
spring.redis.pool.max-active=8
# 连接池最大阻塞等待时间（使用负值表示没有限制）
spring.redis.pool.max-wait=-1
# 连接池中的最大空闲连接
spring.redis.pool.max-idle=8
# 连接池中的最小空闲连接
spring.redis.pool.min-idle=0
# 连接超时时间（毫秒）
spring.redis.timeout=0

用户类

public class User implements Serializable {

	private static final long serialVersionUID = -1L;

	private String username;
	private Integer age;

	public User(String username, Integer age) {
		this.username = username;
		this.age = age;
	}

Redis配置类

RedisObjectSerializer.java

public class RedisObjectSerializer implements RedisSerializer<Object> {

	private Converter<Object, byte[]> serializer = new SerializingConverter();
	private Converter<byte[], Object> deserializer = new DeserializingConverter();

	static final byte[] EMPTY_ARRAY = new byte[0];

	public Object deserialize(byte[] bytes) {
		if (isEmpty(bytes)) {
			return null;
		}

		try {
			return deserializer.convert(bytes);
		} catch (Exception ex) {
			throw new SerializationException("Cannot deserialize", ex);
		}
	}

	public byte[] serialize(Object object) {
		if (object == null) {
			return EMPTY_ARRAY;
		}

		try {
			return serializer.convert(object);
		} catch (Exception ex) {
			return EMPTY_ARRAY;
		}
	}

	private boolean isEmpty(byte[] data) {
		return (data == null || data.length == 0);
	}
}

RedisConfig.java

@Configuration
public class RedisConfig {

	@Bean
	JedisConnectionFactory jedisConnectionFactory() {
		return new JedisConnectionFactory();
	}

	@Bean
	public RedisTemplate<String, User> redisTemplate(RedisConnectionFactory factory) {
		RedisTemplate<String, User> template = new RedisTemplate<String, User>();
		template.setConnectionFactory(jedisConnectionFactory());
		template.setKeySerializer(new StringRedisSerializer());
		template.setValueSerializer(new RedisObjectSerializer());
		return template;
	}
}

测试类

@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(Application.class)
public class ApplicationTest {

	@Autowired
	private StringRedisTemplate stringRedisTemplate;

	@Autowired
	private RedisTemplate<String, User> redisTemplate;

	@Test
	public void test() throws Exception {

		// 保存字符串
		stringRedisTemplate.opsForValue().set("aaa", "111");
		Assert.assertEquals("111", stringRedisTemplate.opsForValue().get("aaa"));

		// 保存对象
		User user = new User("超人", 20);
		redisTemplate.opsForValue().set(user.getUsername(), user);

		user = new User("蝙蝠侠", 30);
		redisTemplate.opsForValue().set(user.getUsername(), user);

		user = new User("蜘蛛侠", 40);
		redisTemplate.opsForValue().set(user.getUsername(), user);

		Assert.assertEquals(20, redisTemplate.opsForValue().get("超人").getAge().longValue());
		Assert.assertEquals(30, redisTemplate.opsForValue().get("蝙蝠侠").getAge().longValue());
		Assert.assertEquals(40, redisTemplate.opsForValue().get("蜘蛛侠").getAge().longValue());
	}
}