SpringBoot2整合Redis实现读写操作_Java教程

1. 启动 Redis Server

启动 redis server，如下图所示，端口号 6379：

SpringBoot2整合Redis实现读写操作

工程目录如下图所示：

SpringBoot2整合Redis实现读写操作

引入依赖：

完整 pom.xml 如下所示：

<?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>2.2.2.RELEASE</version>
<relativePath/>
</parent>
<groupId>com.syrdbt</groupId>
<artifactId>redis-study</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>redis-study</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.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</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>

启动类，RedisStudyApplication.java:

控制器，RedisStudyController.java：

这里使用 SpringBoot 内置的与 Redis 的工具类：RedisTemplate；

除了 RedisTemplate，SpringBoot 还内置了 StringRedisTemplate ；

StringRedisTemplate 只能对 key=String，value=String 的键值对进行操作，RedisTemplate 可以对任何类型的 key-value 键值对操作；StringRedisTemplate 继承了 RedisTemplate。

package com.syrdbt.redis.study.controller;
import com.sun.tools.javac.code.Attribute;
import com.syrdbt.redis.study.constant.Constant;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import java.io.Console;
/**
* @author syrdbt
*/
@RestController
public class RedisStudyController {
@Autowired
private RedisTemplate redisTemplate;
/**
* 通过 key 获取字符串
*/
@GetMapping("/redis/get")
public String visitStringByKey(@RequestParam String key) {
return (String) redisTemplate.opsForValue().get(Constant.NAMESPACE + ":" + key);
}
/**
* 在 redis 中设置 key/value
*/
@GetMapping("/redis/set")
public String visitStringByKey(@RequestParam String key, @RequestParam String value) {
try {
redisTemplate.opsForValue().set(Constant.NAMESPACE + ":" + key, value);
} catch (Exception e) {
return "error";
}
return "success";
}
}

redis 配置类，RedisConfig.java :

package com.syrdbt.redis.study.config;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericToStringSerializer;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
/**
* redis 配置类
*
* @author syrdbt
*/
@Configuration
public class RedisConfig {
private final RedisTemplate redisTemplate;
@Autowired
public RedisConfig(RedisTemplate redisTemplate) {
this.redisTemplate = redisTemplate;
}
@Bean
@SuppressWarnings("unchecked")
public RedisTemplate<String, Object> redisTemplate() {
RedisSerializer<String> stringSerializer = new StringRedisSerializer();
RedisSerializer<Object> jsonString = new GenericToStringSerializer<>(Object.class);
redisTemplate.setKeySerializer(stringSerializer);
redisTemplate.setValueSerializer(jsonString);
redisTemplate.setHashKeySerializer(stringSerializer);
redisTemplate.setHashValueSerializer(jsonString);
return redisTemplate;
}
}