java中的@符号是什么意思? [英] What does the @ sign means in java?

问题描述

以下是代码片段.

@Intercepts({@Signature(
type= Executor.class,
method = "update",
args = {MappedStatement.class,Object.class})})
public class

有人可以向我解释一下@符号在 Java 中的含义吗?

Can someone explain to me what @ sign means in Java?

推荐答案

这是一个注解.

注释是元数据的一种形式.它们提供有关不属于程序本身的程序的数据.注释对其注释的代码的操作没有直接影响.

Annotations are a form of metadata. They provide data about a program that is not part of the program itself. Annotations have no direct effect on the operation of the code they annotate.

注解确实会影响工具和库处理程序的方式，进而影响正在运行的程序的语义.注释可以从源文件、类文件中读取，也可以在运行时以反射方式读取.

Annotations do affect the way programs are treated by tools and libraries, which can in turn affect the semantics of the running program. Annotations can be read from source files, class files, or reflectively at run time.

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