在输入控制器之前如何修改请求参数(@RequestParam String bar)?

理想情况下,我想创建一个注释:


@RequestMapping(method = GET, path = "foo")
public ResponseEntity<String> getBar(@RequestParam @Sanitize("bar") String bar) {

    // bar is sanitized

    /** method body *//
}


根据to this question,我尝试创建接口Sanitize

@Target(ElementType.PARAMETER)
@Retention(RetentionPolicy.RUNTIME)
public @interface Sanitize {
    String value();
}


还有一个解析器SanitizeResolver

public class SanitizeResolver implements HandlerMethodArgumentResolver {

    @Override
    public boolean supportsParameter(MethodParameter parameter) {
        return parameter.getParameterAnnotation(Sanitize.class) != null;
    }

    @Override
    public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
                                  NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {
        Sanitize attr = parameter.getParameterAnnotation(Sanitize.class);
        return MyUtils.sanitize(webRequest.getParameter(attr.value()));
    }
}


并将解析器添加到我的WebMvcConfigurerAdapter的解析器中:

@Override
public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
    argumentResolvers.add(new SanitizeResolver());
}


解析器添加得很好,但从未调用过。

我正在使用Spring 4.2.6.RELEASE
我会错过什么吗?如果无法工作,是否有更好的解决方案?

最佳答案

解决的办法是删除@RequestParam,谢谢Sotirios Delimanolis!

10-08 13:01