SpringBoot启动后直接退出Process finished with exit code 1

问题描述

出现这个问题时，控制台没有任何输出，进程直接退出Process finished with exit code 1

问题解决

尝试加了一行打印语句
System.out.println("SpringBoot Start....");

结果是可以打印出来的：

SpringBoot Start....
Process finished with exit code 1

此时突然想到，那程序入口没问题，就是下一行的问题了。

try {
  SpringApplication.run(Application.class, args);
}catch(Exception e) {
  e.printStackTrace();
}

结果是依然没有任何输出。但是作为踩坑无数的Java程序员，我们知道Exception还不是最顶级的异常类，于是换成Throwable

try {
  SpringApplication.run(Application.class, args);
}catch(Throwable e) {
  e.printStackTrace();
}

启动SpringBoot项目的时候控制台输出的log如下:

Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException

Spring boot集成swagger3出现错误:

原因： 这是因为Springfox使用的路径匹配是基于AntPathMatcher的，而Spring Boot 2.6.X使用的是PathPatternMatcher。
解决：

1、在application.properties里配置：spring.mvc.pathmatch.matching-strategy=ANT_PATH_MATCHER
2、在SwaggerConfig添加以下bean

    @Bean
    public WebMvcEndpointHandlerMapping webEndpointServletHandlerMapping(WebEndpointsSupplier webEndpointsSupplier, ServletEndpointsSupplier servletEndpointsSupplier, ControllerEndpointsSupplier controllerEndpointsSupplier, EndpointMediaTypes endpointMediaTypes, CorsEndpointProperties corsProperties, WebEndpointProperties webEndpointProperties, Environment environment) {
        List<ExposableEndpoint<?>> allEndpoints = new ArrayList();
        Collection<ExposableWebEndpoint> webEndpoints = webEndpointsSupplier.getEndpoints();
        allEndpoints.addAll(webEndpoints);
        allEndpoints.addAll(servletEndpointsSupplier.getEndpoints());
        allEndpoints.addAll(controllerEndpointsSupplier.getEndpoints());
        String basePath = webEndpointProperties.getBasePath();
        EndpointMapping endpointMapping = new EndpointMapping(basePath);
        boolean shouldRegisterLinksMapping = this.shouldRegisterLinksMapping(webEndpointProperties, environment, basePath);
        return new WebMvcEndpointHandlerMapping(endpointMapping, webEndpoints, endpointMediaTypes, corsProperties.toCorsConfiguration(), new EndpointLinksResolver(allEndpoints, basePath), shouldRegisterLinksMapping, null);
    }
    private boolean shouldRegisterLinksMapping(WebEndpointProperties webEndpointProperties, Environment environment, String basePath) {
        return webEndpointProperties.getDiscovery().isEnabled() && (StringUtils.hasText(basePath) || ManagementPortType.get(environment).equals(ManagementPortType.DIFFERENT));
    }