原因:
netty 中无法使用注入的bean,因为NettyClientHandler 是netty启动的时候new出来,并没有交给spring IOC托管,后面给NettyClientHandler 加上@Component 注解也不行,因为netty 的加载优于spring容器初始化,
解决方案1: 想在生成对象时完成某些初始化操作,而这些初始化操作又依赖于注入的bean,因此可以使用@PostConstruct注解一个init方法来完成初始化,该方法会在bean注入完成后被自动调用。
public class NettyClientHandler extends ChannelInboundHandlerAdapter {@Resourceprivate RedissonUtils redissonUtils;private static NettyClientHandler nettyClientHandler ;@PostConstructpublic void init() {nettyClientHandler = this;}@Overridepublic void channelActive(ChannelHandlerContext ctx) {nettyClientHandler.redissonUtils.getString()}
}
解决方案2: 使用工具类来获取需要的bean, 实现ApplicationContextAware 接口
import org.springframework.aop.framework.AopContext;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
import com.ruoyi.common.utils.StringUtils;/*** spring工具类 方便在非spring管理环境中获取bean* */
@Component
public final class SpringUtils implements BeanFactoryPostProcessor, ApplicationContextAware
{/** Spring应用上下文环境 */private static ConfigurableListableBeanFactory beanFactory;private static ApplicationContext applicationContext;@Overridepublic void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {SpringUtils.beanFactory = beanFactory;}@Overridepublic void setApplicationContext(ApplicationContext applicationContext) throws BeansException {SpringUtils.applicationContext = applicationContext;}/*** 获取对象** @param name* @return Object 一个以所给名字注册的bean的实例* @throws org.springframework.beans.BeansException**/@SuppressWarnings("unchecked")public static <T> T getBean(String name) throws BeansException{return (T) beanFactory.getBean(name);}/*** 获取类型为requiredType的对象** @param clz* @return* @throws org.springframework.beans.BeansException**/public static <T> T getBean(Class<T> clz) throws BeansException{T result = (T) beanFactory.getBean(clz);return result;}/*** 如果BeanFactory包含一个与所给名称匹配的bean定义,则返回true** @param name* @return boolean*/public static boolean containsBean(String name){return beanFactory.containsBean(name);}/*** 判断以给定名字注册的bean定义是一个singleton还是一个prototype。 如果与给定名字相应的bean定义没有被找到,将会抛出一个异常(NoSuchBeanDefinitionException)** @param name* @return boolean* @throws org.springframework.beans.factory.NoSuchBeanDefinitionException**/public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException{return beanFactory.isSingleton(name);}/*** @param name* @return Class 注册对象的类型* @throws org.springframework.beans.factory.NoSuchBeanDefinitionException**/public static Class<?> getType(String name) throws NoSuchBeanDefinitionException{return beanFactory.getType(name);}/*** 如果给定的bean名字在bean定义中有别名,则返回这些别名** @param name* @return* @throws org.springframework.beans.factory.NoSuchBeanDefinitionException**/public static String[] getAliases(String name) throws NoSuchBeanDefinitionException{return beanFactory.getAliases(name);}/*** 获取aop代理对象* * @param invoker* @return*/@SuppressWarnings("unchecked")public static <T> T getAopProxy(T invoker){return (T) AopContext.currentProxy();}/*** 获取当前的环境配置,无配置返回null** @return 当前的环境配置*/public static String[] getActiveProfiles(){return applicationContext.getEnvironment().getActiveProfiles();}/*** 获取当前的环境配置,当有多个环境配置时,只获取第一个** @return 当前的环境配置*/public static String getActiveProfile(){final String[] activeProfiles = getActiveProfiles();return StringUtils.isNotEmpty(activeProfiles) ? activeProfiles[0] : null;}/*** 获取配置文件中的值** @param key 配置文件的key* @return 当前的配置文件的值**/public static String getRequiredProperty(String key){return applicationContext.getEnvironment().getRequiredProperty(key);}
}