使用默认的redis配置
- 改pom, 加入redis依赖,版本可以不需要写，由spring的父工程控制。
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-redis -->
<!--整合redis-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
- 配配置类
package com.fuzekun.demo1.configuration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.RedisSerializer;
@Configuration
public class RedisConfig {
@Bean
public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
RedisTemplate<String, Object> template = new RedisTemplate<>();
template.setConnectionFactory(factory);
// 设置key的序列化方式
template.setKeySerializer(RedisSerializer.string());
// 设置value的序列化方式
template.setValueSerializer(RedisSerializer.json());
// 设置hash的key的序列化方式
template.setHashKeySerializer(RedisSerializer.string());
// 设置hash的value的序列化方式
template.setHashValueSerializer(RedisSerializer.json());
template.afterPropertiesSet();
return template;
}
}
- 写测试类
package com.fuzekun.demo1.utils;
import com.fuzekun.demo1.Demo1Application;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.dao.DataAccessException;
import org.springframework.data.redis.core.BoundValueOperations;
import org.springframework.data.redis.core.RedisOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.SessionCallback;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.concurrent.TimeUnit;
@RunWith(SpringRunner.class)
@SpringBootTest
@ContextConfiguration(classes = Demo1Application.class)
public class RedisTests {
@Autowired
private RedisTemplate redisTemplate;
@Test
public void testStrings() {
String redisKey = "test:count";
redisTemplate.opsForValue().set(redisKey, 1);
System.out.println(redisTemplate.opsForValue().get(redisKey));
System.out.println(redisTemplate.opsForValue().increment(redisKey));
System.out.println(redisTemplate.opsForValue().decrement(redisKey));
}
@Test
public void testHashes() {
String redisKey = "test:user";
redisTemplate.opsForHash().put(redisKey, "id", 1);
redisTemplate.opsForHash().put(redisKey, "username", "zhangsan");
System.out.println(redisTemplate.opsForHash().get(redisKey, "id"));
System.out.println(redisTemplate.opsForHash().get(redisKey, "username"));
}
@Test
public void testLists() {
String redisKey = "test:ids";
redisTemplate.opsForList().leftPush(redisKey, 101);
redisTemplate.opsForList().leftPush(redisKey, 102);
redisTemplate.opsForList().leftPush(redisKey, 103);
System.out.println(redisTemplate.opsForList().size(redisKey));
System.out.println(redisTemplate.opsForList().index(redisKey, 0));
System.out.println(redisTemplate.opsForList().range(redisKey, 0, 2));
System.out.println(redisTemplate.opsForList().leftPop(redisKey));
System.out.println(redisTemplate.opsForList().leftPop(redisKey));
System.out.println(redisTemplate.opsForList().leftPop(redisKey));
}
@Test
public void testSets() {
String redisKey = "test:teachers";
redisTemplate.opsForSet().add(redisKey, "刘备", "关羽", "张飞", "赵云", "诸葛亮");
System.out.println(redisTemplate.opsForSet().size(redisKey));
System.out.println(redisTemplate.opsForSet().pop(redisKey));
System.out.println(redisTemplate.opsForSet().members(redisKey));
}
@Test
public void testSortedSets() {
String redisKey = "test:students";
redisTemplate.opsForZSet().add(redisKey, "唐僧", 80);
redisTemplate.opsForZSet().add(redisKey, "悟空", 90);
redisTemplate.opsForZSet().add(redisKey, "八戒", 50);
redisTemplate.opsForZSet().add(redisKey, "沙僧", 70);
redisTemplate.opsForZSet().add(redisKey, "白龙马", 60);
System.out.println(redisTemplate.opsForZSet().zCard(redisKey));
System.out.println(redisTemplate.opsForZSet().score(redisKey, "八戒"));
System.out.println(redisTemplate.opsForZSet().reverseRank(redisKey, "八戒"));
System.out.println(redisTemplate.opsForZSet().reverseRange(redisKey, 0, 2));
}
@Test
public void testKeys() {
redisTemplate.delete("test:user");
System.out.println(redisTemplate.hasKey("test:user"));
redisTemplate.expire("test:students", 10, TimeUnit.SECONDS);
}
// 多次访问同一个key
@Test
public void testBoundOperations() {
String redisKey = "test:count";
BoundValueOperations operations = redisTemplate.boundValueOps(redisKey);
operations.increment();
operations.increment();
operations.increment();
operations.increment();
operations.increment();
System.out.println(operations.get());
}
// 编程式事务
@Test
public void testTransactional() {
Object obj = redisTemplate.execute(new SessionCallback() {
@Override
public Object execute(RedisOperations operations) throws DataAccessException {
String redisKey = "test:tx";
operations.multi();
operations.opsForSet().add(redisKey, "zhangsan");
operations.opsForSet().add(redisKey, "lisi");
operations.opsForSet().add(redisKey, "wangwu");
System.out.println(operations.opsForSet().members(redisKey));
return operations.exec();
}
});
System.out.println(obj);
}
}
运行结果
自己定义RedisconnectionFactory
用来配置登录的地址和登录的端口以及登录密码。
创建RedisConnectionFactory，由他创建RedisConnection。这个工厂会被直接注入到redisTemplate中
官方文档上说使用工厂创建的连接线程安全，并且可以被实例共享。那么就是说，是线程安全的单例模式(个人猜测)。
- 导入jedis依赖
<dependencies>
<!-- other dependency elements omitted -->
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>4.3.1</version>
</dependency>
</dependencies>
- 编写配置类，获取连接工厂
@Configuration
class RedisConfiguration {
@Bean
public JedisConnectionFactory redisConnectionFactory() {
// 设置域名和端口
RedisStandaloneConfiguration config = new RedisStandaloneConfiguration("server", 6379);
config.setPassword("fdafda"); // 设置密码
return new JedisConnectionFactory(config);
}
}
- 将工厂创建的连接注入到模板配置中。仍旧是上面的配置类
package com.fuzekun.demo1.configuration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.connection.RedisSentinelConfiguration;
import org.springframework.data.redis.connection.RedisStandaloneConfiguration;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.RedisSerializer;
@Configuration
public class RedisConfig {
/**
* Jedis
*/
// @Bean
// public RedisConnectionFactory jedisConnectionFactory() {
// RedisSentinelConfiguration sentinelConfig = new RedisSentinelConfiguration()
// .sentinel("node0", 6379);
// sentinelConfig.setPassword("1230");
// return new JedisConnectionFactory(sentinelConfig);
// }
// 创建工厂,配置端口，账号，密码
@Bean
public JedisConnectionFactory redisConnectionFactory() {
RedisStandaloneConfiguration config = new RedisStandaloneConfiguration("node0", 6379);
config.setPassword("1230");
return new JedisConnectionFactory(config);
}
// 将工厂注入到factory中
@Bean
public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
RedisTemplate<String, Object> template = new RedisTemplate<>();
template.setConnectionFactory(factory);
// 设置key的序列化方式
template.setKeySerializer(RedisSerializer.string());
// 设置value的序列化方式
template.setValueSerializer(RedisSerializer.json());
// 设置hash的key的序列化方式
template.setHashKeySerializer(RedisSerializer.string());
// 设置hash的value的序列化方式
template.setHashValueSerializer(RedisSerializer.json());
template.afterPropertiesSet();
return template;
}
}
关于工厂模式的思考：
为什么要用工厂模式？
- 控制对象创建的工序，方便对象的管理。
- 将对象和控制解耦，增加了灵活性，方便对象类的扩展。
- 使用配置文件，解决了对象的选择问题。
为什么使用抽象工厂模式? 定义了产品一族。
