Spring boot将配置属性注入到bean类中

// file application.ymlmy: servers:  - dev.bar.com  - foo.bar.com  - jiaobuchong.com

import org.springframework.boot.context.properties.ConfigurationProperties;import org.springframework.stereotype.Component;import java.util.ArrayList;import java.util.List;/** * file: MyConfig.java * Created by jiaobuchong on 12/29/15. */@Component   //不加这个注解的话, 使用@Autowired 就不能注入进去了@ConfigurationProperties(prefix = "my") // 配置文件中的前缀public class MyConfig {  private List<String> servers = new ArrayList<String>();  public List<String> getServers() { return this.servers;  }}

/** * file： HelloController * Created by jiaobuchong on 2015/12/4. */@RequestMapping("/test")@RestControllerpublic class HelloController {  @Autowired  private MyConfig myConfig;  @RequestMapping("/config")  public Object getConfig() {    return myConfig.getServers();  }}

@Configuration  //标注一个类是配置类，spring boot在扫到这个注解时自动加载这个类相关的功能，比如前面的文章中介绍的配置AOP和拦截器时加在类上的Configuration@EnableAutoConfiguration //启用自动配置 该框架就能够进行行为的配置，以引导应用程序的启动与运行, 根据导入的starter-pom 自动加载配置@ComponentScan //扫描组件 @ComponentScan(value = "com.spriboot.controller") 配置扫描组件的路径public class Application {  public static void main(String[] args) {    // 启动Spring Boot项目的唯一入口    SpringApplication app = new SpringApplication(Application.class);    app.setBannerMode(Banner.Mode.OFF);    app.run(args);  }

my: webserver:  #HTTP 监听端口  port: 80  #嵌入Web服务器的线程池配置  threadPool:   maxThreads: 100   minThreads: 8   idleTimeout: 60000

//file MyWebServerConfigurationProperties.javaimport org.springframework.boot.context.properties.ConfigurationProperties;@ConfigurationProperties(prefix = "my.webserver")public class MyWebServerConfigurationProperties {  private int port;  private ThreadPool threadPool;  public int getPort() {    return port;  }  public void setPort(int port) {    this.port = port;  }  public ThreadPool getThreadPool() {    return threadPool;  }  public void setThreadPool(ThreadPool threadPool) {    this.threadPool = threadPool;  }  public static class ThreadPool {    private int maxThreads;    private int minThreads;    private int idleTimeout;    public int getIdleTimeout() {      return idleTimeout;    }    public void setIdleTimeout(int idleTimeout) {      this.idleTimeout = idleTimeout;    }    public int getMaxThreads() {      return maxThreads;    }    public void setMaxThreads(int maxThreads) {      this.maxThreads = maxThreads;    }    public int getMinThreads() {      return minThreads;    }    public void setMinThreads(int minThreads) {      this.minThreads = minThreads;    }  }}

// file: MyWebServerConfiguration.javaimport org.springframework.context.annotation.Configuration;import org.springframework.boot.context.properties.EnableConfigurationProperties;@Configuration@EnableConfigurationProperties(MyWebServerConfigurationProperties.class)public class MyWebServerConfiguration {  @Autowired  private MyWebServerConfigurationProperties properties;  /**   *下面就可以引用MyWebServerConfigurationProperties类    里的配置了  */  public void setMyconfig() {    String port = properties.getPort();    // ...........  }  }

// file ThreadPoolBean.java/** * Created by jiaobuchong on 1/4/16. */public class ThreadPoolBean {  private int maxThreads;  private int minThreads;  private int idleTimeout;  public int getMaxThreads() {    return maxThreads;  }  public void setMaxThreads(int maxThreads) {    this.maxThreads = maxThreads;  }  public int getMinThreads() {    return minThreads;  }  public void setMinThreads(int minThreads) {    this.minThreads = minThreads;  }  public int getIdleTimeout() {    return idleTimeout;  }  public void setIdleTimeout(int idleTimeout) {    this.idleTimeout = idleTimeout;  }}

import com.jiaobuchong.springboot.domain.ThreadPoolBean;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.context.properties.EnableConfigurationProperties;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;/** * Created by jiaobuchong on 1/4/16. */@Configuration //这是一个配置类，与@Service、@Component的效果类似。spring会扫描到这个类，@Bean才会生效，将ThreadPoolBean这个返回值类注册到spring上下文环境中@EnableConfigurationProperties(MyWebServerConfigurationProperties.class) //通过这个注解, 将MyWebServerConfigurationProperties这个类的配置到上下文环境中,本类中使用的@Autowired注解注入才能生效public class MyWebServerConfiguration {  @SuppressWarnings("SpringJavaAutowiringInspection") //加这个注解让IDE 不报: Could not autowire  @Autowired  private MyWebServerConfigurationProperties properties;  @Bean //@Bean注解在方法上,返回值是一个类的实例,并声明这个返回值(返回一个对象)是spring上下文环境中的一个bean  public ThreadPoolBean getThreadBean() {    MyWebServerConfigurationProperties.ThreadPool threadPool = properties.getThreadPool();    ThreadPoolBean threadPoolBean = new ThreadPoolBean();    threadPoolBean.setIdleTimeout(threadPool.getIdleTimeout());    threadPoolBean.setMaxThreads(threadPool.getMaxThreads());    threadPoolBean.setMinThreads(threadPool.getMinThreads());    return threadPoolBean;  }}

import com.jiaobuchong.springboot.domain.ThreadPoolBean;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;/** * Created by jiaobuchong on 2015/12/4. */@RequestMapping("/first")@RestControllerpublic class HelloController {  @Autowired  private ThreadPoolBean threadPoolBean;  @RequestMapping("/testbean")  public Object getThreadBean() {    return threadPoolBean;  }}