配置文件中配置api的根目录

missyou:
  api-package: com.lin.missyou.api

重写getMappingForMethod方法

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.servlet.mvc.method.RequestMappingInfo;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;

import java.lang.reflect.Method;


public class AutoPrefixUrlMapping extends RequestMappingHandlerMapping {

    @Value("${missyou.api-package}")
    private String apiPackagePath;

    @Override
    protected RequestMappingInfo getMappingForMethod(Method method, Class<?> handlerType) {
        RequestMappingInfo mappingInfo = super.getMappingForMethod(method, handlerType);
        if (mappingInfo != null) {
            String prefix = this.getPrefix(handlerType);
            return RequestMappingInfo.paths(prefix).build().combine(mappingInfo);
        }
        return null;
    }

    private String getPrefix(Class<?> handlerType) {
        String packageName = handlerType.getPackage().getName();
        String dotPath = packageName.replaceAll(this.apiPackagePath, "");
        return dotPath.replace(".", "/");
    }
}

重写MVC注册机制

import com.lin.missyou.core.hack.AutoPrefixUrlMapping;
import org.springframework.boot.autoconfigure.web.servlet.WebMvcRegistrations;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;

@Configuration
public class AutoPrefixConfiguration implements WebMvcRegistrations {

    @Override
    public RequestMappingHandlerMapping getRequestMappingHandlerMapping() {
        return new AutoPrefixUrlMapping();
    }
}