场景

项目搭建专栏：

https://blog.csdn.net/BADAO_LIUMANG_QIZHI/column/info/35688

实现

首先设置打包的方式，这里设置为war包。

找到pom.xml

修改打包时的项目依赖的tomcat，使其在编译运行时使用tomcat,打包时不需要将tomcat打进包中

<!-- 打包时依赖 provided：表示编译运行时使用tomcat,打包时不需要将tomcat打进包中-->
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-tomcat</artifactId>
   <scope>provided</scope>
  </dependency>

找到项目的启动类，使其继承SpringBootServletInitializer并重写方法configure来指定项目启动类。

package com.example.demo;

import java.util.List;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
import org.springframework.context.annotation.Bean;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
@MapperScan("com.example.demo.mapper")
@EnableScheduling
@SpringBootApplication(scanBasePackages= {"com.example.demo.controller","com.example.demo.service","com.example.demo.interceptor","com.example.demo.handler","com.example.demo.job","com.example.demo.email"})
public class HelloSpringBootApplication extends SpringBootServletInitializer{
{



 @Override
 protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
 
  //指明启动类
  return builder.sources(HelloSpringBootApplication.class);
 }

  public static void main(String[] args) {
  
  SpringApplication.run(HelloSpringBootApplication.class, args);
 }

}

右键项目--run as --Maven build