启动时修改@RequestMappings

Question

是否可以在启动时更改@requestmapping值？

@Component
public class CustomRequestMappingHandlerMapping
    extends RequestMappingHandlerMapping
{
    @Override
    protected RequestMappingInfo getMappingForMethod( Method method, Class<?> handlerType )
    {
        RequestMappingInfo info = super.getMappingForMethod( method, handlerType );

        ApiVersion methodApiVersion = AnnotationUtils.findAnnotation( method, ApiVersion.class );
        ApiVersion typeApiVersion = AnnotationUtils.findAnnotation( handlerType, ApiVersion.class );

        if ( typeApiVersion == null )
        {
            return info;
        }

        Set<String> oldPatterns = info.getPatternsCondition().getPatterns();
        Set<String> patterns = new HashSet<>();

        for ( String p : oldPatterns )
        {
            for ( int v = 0; v < typeApiVersion.value().length; v++ )
            {
                ApiVersion.Version version = typeApiVersion.value()[v];

                if ( !p.startsWith( version.getValue() ) )
                {
                    if ( p.startsWith( "/" ) ) patterns.add( "/" + version.getValue() + p );
                    else patterns.add( "/" + version.getValue() + "/" + p );
                }
                else
                {
                    patterns.add( p );
                }
            }
        }

        PatternsRequestCondition patternsRequestCondition = new PatternsRequestCondition(
            patterns.toArray( new String[]{} ), null, null, true, true, null );

        RequestMappingInfo mappingInfo = new RequestMappingInfo(
            null, patternsRequestCondition, info.getMethodsCondition(), info.getParamsCondition(), info.getHeadersCondition(), info.getConsumesCondition(),
            info.getProducesCondition(), info.getCustomCondition()
        );

        return mappingInfo;
    }
}

Answer 1

您可以通过实现handlermapping接口或扩展abstracturlhandlermapping动态添加requestMappings。

其思想是创建您自己的自定义处理程序映射，而不是使用默认实现，如SimpleURLHandlerMapping、DefaultanNotationHandlerMapping等