程序包 cn.taketoday.web.annotation

Annotation Interface RequestAttribute

@Documented @RequestParam @Target({PARAMETER,FIELD}) @Retention(RUNTIME) public @interface RequestAttribute
Annotation to bind a method parameter to a request attribute.

The main motivation is to provide convenient access to request attributes from a controller method with an optional/required check and a cast to the target method parameter type.

从以下版本开始:
2019-02-16 11:34
作者:
Rossen Stoyanchev, TODAY
另请参阅:

  • 可选元素概要

    可选元素
    修饰符和类型
    可选元素
    说明
    String
    name
    The name of the request attribute to bind to.
    boolean
    required
    Whether the request attribute is required.
    String
    value
    Alias for name().

  • 元素详细资料

    • value

      @AliasFor("name") String value
      Alias for name().
      默认值:
      ""

    • name

      @AliasFor("value") String name
      The name of the request attribute to bind to.

      The default name is inferred from the method parameter name.

      默认值:
      ""

    • required

      boolean required
      Whether the request attribute is required.

      Defaults to true, leading to an exception being thrown if the attribute is missing. Switch this to false if you prefer a null or Java 8 java.util.Optional if the attribute doesn't exist.

      默认值:
      true