Spring 4.3中的<task：annotation-driven>的注释是什么

Question

我正在将我的应用程序从Spring 3.x升级到Spring 4.3。而不是xml配置，我想进行java配置（注释）。我无法使用注释进行配置。

<task:executor id="executor" pool-size="8-25" queue-capacity="100" />
<task:scheduler id="scheduler" pool-size="10" />
<context:component-scan annotation-config="true" base-package="com.jobs"/> 
<task:annotation-driven executor="executor" scheduler="scheduler" />

使用注释在何处以及如何配置以上配置。我想将上述xml配置应用于以下MyClassName.java

<bean id="mcn" class="com.jobs.MyClassName">
    <property name="username" value="...."/>
    <property name="authorities">
        <list>
            <value>....</value>
        </list>
    </property>
 </bean>

我试过像使用注解的以下配置，但出现异常：

Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanInitializationException: Properties 'authorities' and 'username' are required for bean 'myClassName'

MyClassName.java

@Component
public class MyClassName{

    @Value("CronUser")
    private String username;

    //@Value("#{'ROLE_SYSTEM'.split(',')}")
    @Value("#{'ROLE_SYSTEM'}")
    private List<String> authorities;

    @Required
    public
    void setUsername(final String aUsername)
    {
         username = aUsername;
    }

    @Required
    public
    void setAuthorities(final List<String> aAuthorities)
    {
        authorities = aAuthorities;
    }
  }

SprinQuartzJobConfig.java

package com.config;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Executor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;

@Configuration
@EnableAsync
@EnableScheduling
@ComponentScan({"com.jobs"})
public class SpringQuartzJobConfig {

@Bean
public Executor taskExecutor() {
    ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
    executor.setCorePoolSize(100);
    executor.setMaxPoolSize(8-25);
    executor.setQueueCapacity(100);
    executor.initialize();
    return executor;
}

@Bean
public Executor taskScheduler() {
    // set properties if required 
    ThreadPoolTaskScheduler scheduler = new ThreadPoolTaskScheduler();
    scheduler.setPoolSize(10);
    return scheduler;
}   
}

上面的xml配置的注释是什么？

Answer 1

使用@EnableScheduling和@EnableAsync分别替换<task:annotation-driven>配置类中的Scheduler和executor，如下所示

@Configuration
@EnableAsync
@EnableScheduling
@ComponentScan({"com.jobs","com.my.package.second"})
public class DemoApplication {

    @Bean
    public Executor taskExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(100);
        executor.setMaxPoolSize(75);
        executor.setQueueCapacity(50);
        executor.initialize();
        return executor;
    }

    @Bean
    public Executor taskScheduler() {
        // set properties if required 
        return new ThreadPoolTaskScheduler();
    }   

    @Bean
    public MyClassName myClass() {
       MyClassName className = new MyClassName();
       // set properties
       return className;
    }
}

有关更多详细信息，请参阅此处的文档。

编辑（由OP报告错误）

关于的几件事 MyClassName

• 替换@Configuration' &@ComponentScan with@ Component`，因为它应该是Spring bean，而不是配置。
• 该字段userName不需要，@Autowired因为其值通过@Value
• 字段authorities也不需要@Autowired。然而作为语法应当纠正@Value("#{'${ROLE_SYSTEM}'.split(',')}")如果ROLE_SYSTEM在属性文件中被定义为ROLE_SYSTEM=foo,bar,alpha,delta
• @Required应该删除所有出现的内容，因为@Autowired默认情况下，基本上所有字段都是必填字段，除非通过另行指定@Autowired(required = false)