启动SpringBoot报错：No more pattern data allowed after {*...} or ** pattern element

报错信息

[AbstractApplicationContext.java:592] → [Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: 
Error creating bean with name 'viewControllerHandlerMapping' defined in class path resource 
[org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: No more pattern data allowed after {*...} or ** pattern element]

原因： "/**/*.do"

@Configuration
public class WebMvcConfig implements WebMvcConfigurer {

    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        //对于index.html的请求,设置返回的视图为index.htl
        registry.addViewController("/index.html").setViewName("/index.htl");
        //所有以.do结尾的请求重定向到/index.html请求
        registry.addRedirectViewController("/**/*.do", "/index.html");
    }
}

方案："/**/*.do" 修改为 "/*.do" 后成功启动

    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        //对于index.html的请求,设置返回的视图为index.htl
        registry.addViewController("/index.html").setViewName("/index.htl");
        //所有以.do结尾的请求重定向到/index.html请求
        registry.addRedirectViewController("/*.do", "/index.html");
    }