1、引入自动配置依赖开启代码提示功能
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-configuration-processor</artifactId> <optional>true</optional> </dependency>
2、编写一个自动配置类
@ConfigurationProperties(prefix = "gulimall.thread") @Component @Data public class ThreadPoolConfigProperties { private Integer corePoolSize; private Integer maxPoolSize; private Integer keepAliveTime; }
3、在properties中加入常量配置
# 线程池的参数 gulimall.thread.core-pool-size=20 gulimall.thread.max-pool-size=200 gulimall.thread.keep-alive-time=10
4、引用自动配置
因为自动配置类中使用了Componet注解所以可以直接在SpringBoot容器中的方法的参数中直接引入
如果没有加入Component则需要在引入的地方加入@EnableConfigurationProperties(ThreadPoolConfigProperties.class)，然后使用Auto注入使用
@Configuration public class MyThreadConfig { @Bean public ThreadPoolExecutor threadPoolExecutor(ThreadPoolConfigProperties threadPoolConfigProperties) { ThreadPoolExecutor executor = new ThreadPoolExecutor( threadPoolConfigProperties.getCorePoolSize(), // 核心线程数 threadPoolConfigProperties.getMaxPoolSize(), // 最大线程数 threadPoolConfigProperties.getKeepAliveTime(), // 线程空闲后的最大存活时间 TimeUnit.SECONDS, // 时间单位 new LinkedBlockingDeque<>(20000), // 任务队列 new ThreadPoolExecutor.AbortPolicy() // 拒绝策略 ); return executor; } }
