本章节将介绍怎样在 Spring Boot 应用中引入 Spring Data Redis，且使用它操作 Redis NoSQL 数据库。项目结构图如下：
在 pom.xml 中添加如下依赖：
<?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>2.1.7.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.huangx.redis</groupId> <artifactId>redis_learn_spring_data</artifactId> <version>1.0-SNAPSHOT</version> <name>redis_learn_spring_data</name> <description>Spring Boot for redis</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <!-- Spring Data Redis 依赖 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
创建一个 Configuration 配置类，代码如下：
package com.hxstrive.redis.config;
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.StringRedisSerializer;
/**
* Redis配置
* @author hxstrive.com 2022/2/26
*/
@Configuration
public class RedisConfig {
@Bean
public RedisTemplate<String,String> redisTemplate(RedisConnectionFactory factory) {
RedisTemplate<String,String> redisTemplate = new RedisTemplate<>();
// 为 Tempalte 设置连接工厂
redisTemplate.setConnectionFactory(factory);
// 设置 Key 的序列化方式
redisTemplate.setKeySerializer(new StringRedisSerializer());
// 设置 Value 的序列化方式
redisTemplate.setValueSerializer(new StringRedisSerializer());
// 设置默认序列化方式
redisTemplate.setDefaultSerializer(new StringRedisSerializer());
redisTemplate.afterPropertiesSet();
return redisTemplate;
}
}创建一个简单的单元测试类，使用 @RunWith 和 @SpringBootTest 注解启动 Spring Boot 的单元测试，代码如下：
package com.hxstrive.redis;
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.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.test.context.junit4.SpringRunner;
/**
* Spring Data Redis 入门示例
* @author hxstrive.com 2022/2/26
*/
@RunWith(SpringRunner.class)
@SpringBootTest
public class HelloWorld {
@Autowired
private RedisTemplate<String,String> redisTemplate;
@Test
public void contextLoads() {
System.out.println("redisTemplate = " + redisTemplate);
ValueOperations<String,String> ops = redisTemplate.opsForValue();
System.out.println("ops = " + ops);
// 写入数据到 Redis
ops.set("spring-data-redis", "Hi! Spring Data Redis");
// 从 Redis 获取数据
System.out.println(ops.get("spring-data-redis"));
}
}运行代码输出如下：
redisTemplate = org.springframework.data.redis.core.RedisTemplate@4a50d04a ops = org.springframework.data.redis.core.DefaultValueOperations@4d7a64ca Hi! Spring Data Redis
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