springboot +lettuce +redis 快取使用

springboot 使用的是2.2  redis 使用的版本是3.0下面是相關的程式碼

pom的依賴如下 ：

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-web</artifactId>
</dependency>

<dependency>
   <groupId>org.projectlombok</groupId>
   <artifactId>lombok</artifactId>
   <optional>true</optional>
</dependency>

<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>

然後的配置檔案如下：
 

server:
  port: 9015
spring:
  redis:
    database: 0
    host: localhost
    port: 6379
    password:
    lettuce:
      pool:
        min-idle: 0
        max-idle: 8
        max-wait: -1m
        max-active: 20

使用的實體類如下：
 

import lombok.Data;

import java.io.Serializable;

@Data
public class User implements Serializable {
    private  int id ;
    private String name;
    private  int age;
}

配置類如下：
 

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

import java.io.Serializable;

@Configuration
public class RedisConfig {

    @Bean
    public RedisTemplate<String, Serializable> redisTemplate(LettuceConnectionFactory connectionFactory) {
        RedisTemplate<String, Serializable> redisTemplate = new RedisTemplate<>();
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer());
        redisTemplate.setConnectionFactory(connectionFactory);
        return redisTemplate;
    }
}

呼叫redis的操作類如下：

 

import com.ext.demolettuce.entity.User;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.io.Serializable;

@RestController
public class testController {
    private Logger logger = LoggerFactory.getLogger(testController.class);
    @Autowired
    private RedisTemplate<String, Serializable> template;

    @RequestMapping("/get1")
    public  String  getOne(){
        String key = "user:1";
        User user = new User();
        user.setId(1);
        user.setName("aa");
        user.setAge(11);
        template.opsForValue().set(key, user);
        User user1 = (User) template.opsForValue().get(key);
        logger.info("--------------------uesr: "+user1.toString());
        return  "success";
    }
}

 

要注意的是 使用lettuce的時候必須要加 commons-pool2 這個依賴，否則會出現連線錯誤。

歡迎批評指正