anonymous unions
时间: 2023-02-09 22:08:10 浏览: 53
匿名联合体是一种在 C 和 C++ 编程语言中定义的数据类型,它允许在不需要名称的情况下定义一个联合体。在这种情况下,联合体的成员变量可以直接访问,而不需要通过联合体的名称来访问。这在某些情况下会使代码更简洁。
相关问题
anonymous
在 Spring Security 中,anonymous 是一种访问权限控制方式,用于控制未经过身份验证的用户(即匿名用户)能够访问哪些资源。
使用 anonymous 权限控制方式,可以指定一个或多个 URL 路径,允许匿名用户访问这些资源。例如,以下代码配置了对“/public/**”路径的访问权限,允许任何人访问该路径:
```
@Override
protected void configure(HttpSecurity http) throws Exception {
http.authorizeRequests()
.antMatchers("/public/**").anonymous()
.anyRequest().authenticated()
.and()
.formLogin()
.and()
.httpBasic();
}
```
在这个例子中,“.anonymous()”方法指定了对“/public/**”路径的匿名访问权限。这意味着任何人都可以访问以“/public/”开头的所有路径,而不需要进行身份验证。
需要注意的是,anonymous 权限控制方式只是一种访问控制方式,不能替代身份验证。在实际应用中,仍然需要对敏感资源进行身份验证,以确保资源的安全性。
anonymous class
An anonymous class in Java is a local inner class that does not have a name. It is defined and instantiated at the same time as a single expression. Anonymous classes are commonly used when implementing interfaces or extending abstract classes that have only one or a few methods. They are also often used for event handling in graphical user interfaces (GUIs). The syntax for defining an anonymous class is as follows:
```
interface MyInterface{
void myMethod();
}
class MyClass{
void myMethod(){
MyInterface anonymousClass = new MyInterface(){
public void myMethod(){
System.out.println("This is an anonymous class!");
}
};
anonymousClass.myMethod();
}
}
```
In this example, an anonymous class is defined and instantiated at the same time as a single expression within the `myMethod()` method of the `MyClass` class. The anonymous class implements the `MyInterface` interface and provides an implementation for the `myMethod()` method. When the `myMethod()` method is called on the anonymous class object, it prints the message "This is an anonymous class!" to the console.