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@WebServlet(name="MyServlet",urlPatterns="/first")public class MyServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { System.out.println("Hello World!!!!!!!!!!"); }} @SpringBootApplication@ServletComponentScan //该注解写上以后会自动寻找包含@WebServlet注解的类，并实例化public class ServletSpringApplication { public static void main(String[] args) { SpringApplication.run(ServletSpringApplication.class, args); } } //@WebServlet(name="MyServlet",urlPatterns="/first")public class MyServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { System.out.println("Hello World!!!!!!!!!!"); }} @SpringBootApplication//@ServletComponentScan //该注解写上以后会自动寻找包含@WebServlet注解的类，并实例化public class ServletSpringApplication { public static void main(String[] args) { SpringApplication.run(ServletSpringApplication.class, args); } @Bean public ServletRegistrationBean getBean() { ServletRegistrationBean bean = new ServletRegistrationBean(new MyServlet()); bean.addUrlMappings("/hello"); return bean; }} 俩种方法在运行后，通过访问，最后在控制台上都会打印
. ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v2.1.3.RELEASE)2019-03-04 15:51:43.708 INFO 4808 --- [ main] c.example.demo.ServletSpringApplication : Starting ServletSpringApplication on hzp-PC with PID 4808 (started by hzp in G:\eclipse\Java工程\servletSpring)2019-03-04 15:51:43.746 INFO 4808 --- [ main] c.example.demo.ServletSpringApplication : No active profile set, falling back to default profiles: default2019-03-04 15:51:45.590 INFO 4808 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)2019-03-04 15:51:45.631 INFO 4808 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]2019-03-04 15:51:45.631 INFO 4808 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.16]2019-03-04 15:51:45.647 INFO 4808 --- [ main] o.a.catalina.core.AprLifecycleListener : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [C:\Program Files\Java\jre1.8.0_162\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program Files/Java/jre1.8.0_162/bin/server;C:/Program Files/Java/jre1.8.0_162/bin;C:/Program Files/Java/jre1.8.0_162/lib/amd64;C:\ProgramData\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;D:\Program Files\MySQL\MySQL Server 5.5\bin;c:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\;c:\Program Files\Microsoft SQL Server\100\Tools\Binn\;c:\Program Files\Microsoft SQL Server\100\DTS\Binn\;D:\eclipse\Apache\maven\bin;D:\c++\Qt5.3.1\Tools\mingw482_32\bin;D:\c++\Qt5.3.1\5.3\mingw482_32\bin;C:\Program Files\mingw-w64\x86_64-5.3.0-win32-seh-rt_v4-rev0\mingw64\bin;F:\Program Files\Git\cmd;G:\Program Files\Tortoise\bin;;G:\软件\spring-tool-suite-4-4.1.1.RELEASE-e4.10.0-win32.win32.x86_64\sts-4.1.1.RELEASE;;.]2019-03-04 15:51:45.802 INFO 4808 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext2019-03-04 15:51:45.802 INFO 4808 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1967 ms2019-03-04 15:51:46.160 INFO 4808 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'2019-03-04 15:51:46.450 INFO 4808 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''2019-03-04 15:51:46.454 INFO 4808 --- [ main] c.example.demo.ServletSpringApplication : Started ServletSpringApplication in 3.435 seconds (JVM running for 3.883)Hello World!!!!!!!!!!
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