什么是Java bean？ [英] What is a Java bean?

问题描述

可能重复：

豆子有什么意义？

什么是javabean ？它是干什么用的？什么是代码示例？我听说它用于与getter和setter方法有关吗？我对java bean是什么以及你甚至访问它的地方都很困惑。我用谷歌搜索但找不到明确的答案。

What is a javabean? What is it used for? And what are some code examples? I heard it is used for something to do with getter and setter methods? I'm quite confused about what a java bean is and where you even access it. I googled it but couldn't find a definite answer.

推荐答案

Java Bean是一个普通的Java类，它具有私有属性public getter和setter方法。

Java Bean is a normal Java class which has private properties with its public getter and setter method.

Java Bean通常用作帮助类。

Java Beans are generally used as helper class.

示例 -

public class User implements java.io.Serializable {

    private String name;
    private Integer age;

    public String getName(){
        return this.name;
    }

    public void setName(String name){
        this.name = name;
    }

    public Integer getAge(){
        return this.age;
    }

    public void setAge(Integer age){
        this.age = age;
    }
}

实施可序列化不是强制性的，但如果您想在Java的内存中保留或传输Javabeans，则非常有用，例如在硬盘或网络上。

Implementing Serializable is not mandatory but is very useful if you'd like to persist or transfer Javabeans outside Java's memory, e.g. in harddisk or over network.

地方使用JavaBeans的地方？

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