Spring Boot 2.0深度实践之核心技术篇【第一节 系列总览-核心特性】

1课程导学

1.1 Spring Boot是如何基于Spring Framework逐步走向自动装备？

1.2SpringApplication是怎样掌控Spring应用生命周期?

1.3SpringBoot外部化配置与Spring Environment抽象之间是什么关系？

1.4 Spring Web MVC向Spring Reactive WebFlux过渡的真实价值和意义?

Spring Boot2.0好学么？

• 组件自动装备:
• 外部化配置:
• 嵌入式容器:(Netty:webflux)
• Spring Boot Starter

Spring Boot难精

• 组件自动装配: 模式注解、@Enable模块、条件装配、加载机制
• 外部化配置: Environment抽象、生命周期、破坏性变更
• 嵌入式容器:Servlet Web容器、Reative Web容器
• Spring Boot Starter:依赖管理、装配条件、装配顺序
• -Production-Ready:健康检查、数据指标、@Endpoint管控

Spring Boot与Java EE规范

4 核心特性介绍

5 核心特性之组件自动装配工程部分

6 Web应用介绍

@SpringBootApplication
@ServletComponentScan
public class Application1_7 {

    public static void main(String[] args) {

        SpringApplication.run(Application1_7.class,args);

    }
}

@WebServlet(urlPatterns = "/hi")
public class MyServlet  extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.getWriter().println("Hey Man");
    }
}

@WebServlet(urlPatterns = "/hi", asyncSupported = true)
public class MyServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.getWriter().println("666666666");
    }
}

@WebServlet(urlPatterns = "/hi", asyncSupported = true)
public class MyServlet  extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        AsyncContext asyncContext = req.startAsync();

        asyncContext.start(() ->{
            try {
                resp.getWriter().println("666666666");
                //触发完成
                asyncContext.complete();
            } catch (IOException e) {
                e.printStackTrace();
            }
        });
    }
}

9 Spring Web MVC 应用介绍

10 Spring WebFlux 应用

• spring 5开始支持的新特性(是对Servlet的补充,从传统的同步阻塞变成异步非阻塞编程)

• Reactive:提高系统吞吐量(但是不代表快)
  
  
  

11 Web Server 应用

• Tomcat的加载优先级高于Jetty,所以需要排除Tomcat.
  
• WebFlux的优先级会低于传统的Web容器.
  

12 数据相关介绍

13 功能扩展介绍

14 运维管理介绍

jsonsole

• 开放所有webpoints
  

management.endpoints.web.exposure.include=*