用于修改请求参数的注释

时间:2016-08-26 14:34:48

标签: java spring validation spring-mvc

如何在进入控制器之前修改请求参数(@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,我尝试创建界面Sanitize

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

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WebMvcConfigurerAdapter的解析器中:

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

解析器添加良好,但从未调用过。

我正在使用Spring 4.2.6.RELEASE。 我是否会遗漏某些内容,如果无法解决问题,是否有更好的解决方案?

1 个答案:

答案 0 :(得分:0)

解决方案是删除@RequestParam,感谢Sotirios Delimanolis!