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  • springBoot入门

    整合玩ssm ,折腾springboot,对着官网,别人的demo 看着简单,自己操作起来 一堆错误。

    环境IDEA,maven,过程不演示 ,

    file=>new project=>mavent(不用选择模板)=>next=> 填写groupid,artifactid 后next> next........

    新建一个Hellocontroller, HelloApplication

    最后工程如图:

    pom.xml

        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.1.8.RELEASE</version>
        </parent>
    
        <!--导入springBoot 的依赖-->
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
        </dependencies>
    
        <!--Creating an Executable Jar-->
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    View Code

    HelloController
    /**
     * Create by  on 2019-09-26
     *  RestController 是@Controller @ResponseBody组合体
     * @author lsw
     */
    @RestController
    public class HelloController {
    
        @RequestMapping("/hello")
        String hello() {
            return "Hello World!";
        }
    }
    View Code
    
    
    HelloApplication
    
    
    /**
     * Create by  on 2019-09-26
     * SpringBootApplication 标注这是个springBoot 运用
     * @author lsw
     */
    @SpringBootApplication
    public class HelloApplication {
    
        public static void main(String[] args) {
            SpringApplication.run( HelloApplication.class, args);
        }
    
    }
    View Code
    
    
    

    汇总遇到的问题:

    Caused by: java.net.BindException: Address already in use: bind

    好吧 端口占用了 网上有的杀死端口  。解决办法:

    resources目录下新建 application.properties 文件 内容: server.port=8088


    错误2:
    Your ApplicationContext is unlikely to start due to a @ComponentScan of the default package
    好吧大概意思测试类 没有在包下面 啥spring 容器注册的时候xxxx
    解决方案:
    https://blog.csdn.net/qq_15071263/article/details/78459087
    https://www.cnblogs.com/gudi/p/7892769.html


     参考资料:

    https://docs.spring.io/spring-boot/docs/2.1.8.RELEASE/reference/html/getting-started-first-application.html#getting-started-first-application-pom

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  • 原文地址:https://www.cnblogs.com/y112102/p/11593500.html
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