1.springboot內嵌tomcat，但是不支援jsp，如果需要，就手動匯入jsp，以下是相關配置

<dependency>
			<groupId>org.apache.tomcat.embed</groupId>
			<artifactId>tomcat-embed-jasper</artifactId>
			<scope>provided</scope>
</dependency>

2.springboot支援自動配置，可以手動關閉某一項的自動配置

例：@SpringBootApplication(exclude={RedisAutoConfiguration.class})

3.Springboot的配置檔案application.properties或者 application.yml，

4.springboot配置springmvc攔截器

    a .在springboot主入口程式包下新建一個類繼承WebMvcConfigurerAdapter，

    b.類上面加註解@Configuration

     c.重新寫HandlerInerceptor

import java.nio.charset.Charset;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

@Configuration //申明這是一個配置
public class MySrpingMVCConfig extends WebMvcConfigurerAdapter{

    // 自定義攔截器
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        HandlerInterceptor handlerInterceptor = new HandlerInterceptor() {
            @Override
            public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
                    throws Exception {
                System.out.println("自定義攔截器............");
                return true;
            }
            
            @Override
            public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
                    ModelAndView modelAndView) throws Exception {
                
            }
            
            @Override
            public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler,
                    Exception ex) throws Exception {
            }
        };
        registry.addInterceptor(handlerInterceptor).addPathPatterns("/**");
    }

   

}
 

執行流程：Springboot主入口程式的 @ComponentScan  註解會掃描主入口程式包下當前包及子包下所有類。

                   掃描到我們定義的類 後有註解configuration 就會繼續掃描，執行攔截器

5.SpringBoot專案釋出到獨立的Tomcat中執行

  a.工程的打包方式 為war包

  b.將Spring-boot-starter-tomcat的範圍設定為provided。

<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-tomcat</artifactId>
			<scope>provided</scope>
</dependency>
 

 c.修改程式碼，設定啟動配置

    需要繼承SpringBootServletInitializer，然後重寫configure，將SpringBoot的入口類設定進去

  d.打包。