spring 自定义参数解析器HandlerMethodArgumentResolver

1、自定义注解：

@Target({ ElementType.PARAMETER})  
@Retention(RetentionPolicy.RUNTIME)  
public @interface QueryParam{

   String value() default "";
}

2、自定义参数类型,利用javaBean接受

public class QueryBean {
   private Page page = new Page();
   /**
    * 排序
    */
   private Sort[] sorts;
   /**
    * 查询参数
    */
   private Map<String, Object> paraMap;
   
   private Map<String,String> sortDirection;
}

3、自定义参数解析器，实现HandlerMethodArgumentResolver接口

public class QueryBeanModelMethodProcessor implements
      HandlerMethodArgumentResolver {

   public QueryBeanModelMethodProcessor() {
    }
   


   @Override
   public Object resolveArgument(MethodParameter parameter,
         ModelAndViewContainer mavContainer, NativeWebRequest request,
         WebDataBinderFactory binderFactory) throws Exception {
       // TODO Auto-generated method stub
      
       HttpServletRequest nativeRequest = (HttpServletRequest) request.getNativeRequest();
       return QueryBeanUtil.parseParameter(nativeRequest);
   }


   @Override
   public boolean supportsParameter(MethodParameter parameter) {
      // TODO Auto-generated method stub
       if (parameter.hasParameterAnnotation(QueryParam.class)) {
               return true;
           }
          return false;
   }

}

4、在xml中注入

<mvc:annotation-driven>
    <mvc:argument-resolvers>
        <bean class="com.xxx.xx.QueryParam"></bean>
    </mvc:argument-resolvers>
</mvc:annotation-driven>