redisConfiguration报错

来源：13-6 service的迁移

Vtech

2021-12-12

Description:

The dependencies of some of the beans in the application context form a cycle:

┌──->──┐
| redisConfiguration (field private redis.clients.jedis.JedisPoolConfig com.imooc.o2o.config.redis.RedisConfiguration.jedisPoolConfig)
└──<-──┘

Action:

Relying upon circular references is discouraged and they are prohibited by default. Update your application to remove the dependency cycle between beans. As a last resort, it may be possible to break the cycle automatically by setting spring.main.allow-circular-references to true.

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘redisConfiguration’: Unsatisfied dependency expressed through field ‘jedisPoolConfig’; nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name ‘redisConfiguration’: Requested bean is currently in creation: Is there an unresolvable circular reference?

报错原因说好像产生循环注入/依赖了？

我看视频直接用的最后项目给的配置，我用的也是最后项目的配置，应该没问题呀。properties也加了的。

是不是2.6版本Spring的检测特性？
我照着他的建议加一个设置允许循环注入试试。
在配置中加了个spring.main.allow-circular-references=true，可以了

是2.6版本Spring的特性，不允许循环注入/依赖，有相同问题的同学可以这样解决

写回答

3回答

qq_慕的地8417648

2022-01-27

大佬牛

qq_慕瓜4505296

2022-07-11

循环依赖产生的原因是创建和调用都在同一个类中进行的，不妨改一下注入的方式，在方法的形参当中使用自动注入即可，下面这个是我修改后的代码，单元测试执行成功

package com.JeTAime.o2oschoolshop.config.redis;

import com.JeTAime.o2oschoolshop.cache.JedisPoolWriper;
import com.JeTAime.o2oschoolshop.cache.JedisUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import redis.clients.jedis.JedisPoolConfig;

/**
 * spring-redis.xml里的配置
 *
 * @author xiangze
 */
@Configuration
public class RedisConfiguration {
    @Value("${redis.hostname}")
    private String hostname;
    @Value("${redis.port}")
    private int port;
    @Value("${redis.pool.maxActive}")
    private int maxTotal;
    @Value("${redis.pool.maxIdle}")
    private int maxIdle;
    @Value("${redis.pool.maxWait}")
    private long maxWaitMillis;
    @Value("${redis.pool.testOnBorrow}")
    private boolean testOnBorrow;

    @Value("${redis.password}")
    private String password;


    /**
     * 创建redis连接池的设置
     *
     * @return
     */
    @Bean(name = "jedisPoolConfig")
    public JedisPoolConfig createJedisPoolConfig() {
        JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
        // 控制一个pool可分配多少个jedis实例
        jedisPoolConfig.setMaxTotal(maxTotal);
        // 连接池中最多可空闲maxIdle个连接 ，这里取值为20，
        // 表示即使没有数据库连接时依然可以保持20空闲的连接，
        // 而不被清除，随时处于待命状态。
        jedisPoolConfig.setMaxIdle(maxIdle);
        // 最大等待时间:当没有可用连接时,
        // 连接池等待连接被归还的最大时间(以毫秒计数),超过时间则抛出异常
        jedisPoolConfig.setMaxWaitMillis(maxWaitMillis);
        // 在获取连接的时候检查有效性
        jedisPoolConfig.setTestOnBorrow(testOnBorrow);
        return jedisPoolConfig;
    }

    /**
     * 创建Redis连接池，并做相关配置
     *
     * @return
     */
    @Bean(name = "jedisWritePool")
    public JedisPoolWriper createJedisPoolWriper(@Autowired JedisPoolConfig jedisPoolConfig) {
        JedisPoolWriper jedisPoolWriper = new JedisPoolWriper(jedisPoolConfig, hostname, port, password);
        return jedisPoolWriper;
    }

    /**
     * 创建Redis工具类，封装好Redis的连接以进行相关的操作
     *
     * @return
     */
    @Bean(name = "jedisUtil")
    public JedisUtil createJedisUtil(@Autowired JedisPoolWriper jedisWritePool) {
        JedisUtil jedisUtil = new JedisUtil();
        jedisUtil.setJedisPool(jedisWritePool);
        return jedisUtil;
    }

    /**
     * Redis的key操作
     *
     * @return
     */
    @Bean(name = "jedisKeys")
    public JedisUtil.Keys createJedisKeys(@Autowired JedisUtil jedisUtil) {
        JedisUtil.Keys jedisKeys = jedisUtil.new Keys();
        return jedisKeys;
    }

    /**
     * Redis的Strings操作
     *
     * @return
     */
    @Bean(name = "jedisStrings")
    public JedisUtil.Strings createJedisStrings(@Autowired JedisUtil jedisUtil) {
        JedisUtil.Strings jedisStrings = jedisUtil.new Strings();
        return jedisStrings;
    }

}