如何替换默认的 SortArgumentResolver

我需要添加private static final Sort sortById = new Sort(Sort.Direction.DESC, ID);每一个Pageable。我想，最好的方法是创建装饰器/适配器SortArgumentResolver.

我已经创建了类：

public class IdSortArgumentResolver implements SortArgumentResolver {

private static final String ID = "id";
private static final Sort sortById = new Sort(Sort.Direction.DESC, ID);
private final SortArgumentResolver delegate;

public IdSortArgumentResolverAdapter(SortArgumentResolver delegate) {
    this.delegate = delegate;
}

@Override
public boolean supportsParameter(MethodParameter methodParameter) {
    return delegate.supportsParameter(methodParameter);
}

@Override
public Sort resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest webRequest, WebDataBinderFactory binderFactory) {
    Sort sort = delegate.resolveArgument(parameter, mavContainer, webRequest, binderFactory);
    if (isNull(sort)) {
        return sortById;
    }
    if (containsSortById(sort)) {
        return sort;
    }
    return sort.and(sortById);
}

private static boolean containsSortById(Sort currentSort) {
    return StreamSupport.stream(currentSort.spliterator(), false)
                        .anyMatch(order -> ID.equalsIgnoreCase(order.getProperty()));
}

}

我如何更改默认值SortArgumentResolver to IdSortArgumentResolver？是否可以？或者也许有更好的方法来做到这一点......

P.S 这是spring-boot 1.5.2 RELEASE和当前的SortHandlerMethodArgumentResolver配置在SpringDataWebConfiguration

注意：在您的帖子中，您的班级名称是IdSortArgumentResolver但你的构造函数是IdSortArgumentResolverAdapter.

创建一个配置类扩展WebMvcConfigurerAdapter:

@Configuration
public class WebMvcConfiguration extends WebMvcConfigurerAdapter {

    // ...
}

覆盖addArgumentResolvers方法并配置你的Sort and Pageable解析器：

@Override
public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
    // FIXME Replace null with what you want
    SortArgumentResolver sortResolver = new IdSortArgumentResolver(null);

    // For sorting resolution alone
    argumentResolver.add(sortResolver);

    PageableHandlerMethodArgumentResolver pageableResolver = new PageableHandlerMethodArgumentResolver(sortResolver);

    // For sorting resolution encapsulated inside a pageable
    argumentResolver.add(pageableResolver);
}

更好的解决方案没有自定义类：

@Override
public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
    SortHandlerMethodArgumentResolver sortResolver = new SortHandlerMethodArgumentResolver();

    sortResolver.setFallbackSort(new Sort(Sort.Direction.DESC, "id"));

    // For sorting resolution alone
    argumentResolver.add(sortResolver);

    PageableHandlerMethodArgumentResolver pageableResolver = new PageableHandlerMethodArgumentResolver(sortResolver);

    // For sorting resolution encapsulated inside a pageable
    argumentResolver.add(pageableResolver);
}