SpringBoot的内嵌和外置tomcat的实现方式

server.port=8081
server.context-path=/tx
server.tomcat.uri-encoding=UTF-8

package com.qcby.config;

import com.qcby.component.MyServlet;
import com.qcby.component.MyFilter;
import com.qcby.component.MyListener;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletListenerRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.Arrays;

@Configuration
//@Configuration：标记这是一个Spring配置类，Spring会扫描其中的 @Bean 方法
//相当于传统的XML配置文件，但使用Java代码配置
public class WebComponentConfig {

    // 1. 注册Servlet
    @Bean
    public ServletRegistrationBean myServlet(){
        ServletRegistrationBean registrationBean =
                new ServletRegistrationBean(new MyServlet(), "/myServlet");
        return registrationBean;
    }

    // 2. 注册Filter
    @Bean
    public FilterRegistrationBean myFilter(){
        FilterRegistrationBean registrationBean = new FilterRegistrationBean();
        registrationBean.setFilter(new MyFilter());
        registrationBean.setUrlPatterns(Arrays.asList("/hello", "/myServlet"));
        return registrationBean;
    }

    // 3. 注册Listener
    @Bean
    public ServletListenerRegistrationBean myListener(){
        ServletListenerRegistrationBean registrationBean =
                new ServletListenerRegistrationBean(new MyListener());
        return registrationBean;
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.qcby</groupId>
    <artifactId>TomcatDemo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>TomcatDemo</name>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

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

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

package com.qcby.TomcatDemo;

import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.support.SpringBootServletInitializer;

public class ServletInitializer extends SpringBootServletInitializer {

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(TomcatDemoApplication.class);
    }

}