expected to be of type ‘org.springframework.scheduling.TaskScheduler‘ but was actually of NullBean_required a bean of type \'org.springframework.sched

springboot在整合websocket出现一下报错：

org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named \'defaultSockJsTaskScheduler\' is expected to be of type \'org.springframework.scheduling.TaskScheduler\' but was actually of type \'org.springframework.beans.factory.support.NullBean\'

解决方案

添加一个定时任务的配置类来创建一个ThreadPoolTaskScheduler对象。

 import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import org.springframework.scheduling.TaskScheduler;import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler; /** * @author 寅灯 * @version 3.0 */@Configurationpublic class ScheduledConfig { @Bean public TaskScheduler taskScheduler() { ThreadPoolTaskScheduler scheduling = new ThreadPoolTaskScheduler(); scheduling.setPoolSize(20); scheduling.initialize(); return scheduling; } }