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代码的魔法师：Java反射工厂模式详解

定义实体类 package world.xuewei; /** * 用户实体 * * @author 薛伟 * @since 2023/9/14 17:17 */ public class User { /** * 用户名 */ priva...

常见 Java 代码缺陷及规避方式（中）

常见 Java 代码缺陷及规避方式（上）：https://developer.aliyun.com/article/1480648 ▐ 线程安全问题 JVM 的内存模型十分复杂，难以理解, <>告诉我们，除非你对 JVM 的线程安全原理十分熟悉，否则应该严格遵守基本的 Jav...

「大师课」搞定 Java 开发基础

23 课时 |

8714 人已学 |

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Java Spring Boot 2.6.0开发实战-1024程序员节创造营公益课

5 课时 |

1162 人已学 |

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Java Web开发-Web应用、Tomcat、HTTP请求与响应

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常见 Java 代码缺陷及规避方式（下）

常见 Java 代码缺陷及规避方式（中）：https://developer.aliyun.com/article/1480647 特殊异常的处理 InterruptedException 一般是上层调度者主动发起的中断信号，例如某个任务执行超时，那么调度者通过将线程置为 interuppted 来...

23种设计模式，模板方法模式的概念优缺点以及JAVA代码举例

模板方法模式是一种行为设计模式，它定义了一个操作中的算法的骨架，而将一些步骤延迟到子类中。模板方法使得子类可以在不改变算法结构的情况下，重新定义算法中的某些特定步骤。模板方法模式的概念在模板方法模式中，一个抽象类公开定义了执行它的方法的方式/模板。它的子类可以按需要重写方法实现，但调用将以抽象类...

23种设计模式，状态模式的概念优缺点以及JAVA代码举例

状态模式（State Pattern）状态模式是一种行为设计模式，允许一个对象在其内部状态改变时改变它的行为，这个对象看起来似乎修改了它的类。概念 Context（上下文）：维护一个指向当前状态的引用，并允许客户端进行操作，其行为随着其状态对象的改变而改变。 State（状态）：定义一个接口，封...

java代码实现AES_CMAC 算法测试

{ public static String K = "4e25a17527b9a2f32d47023f055c7e95";//固定密钥 static { // 添加 Bouncy Castle 作为安全提供者 if (Security.getProvider("BC") == null) { Se...

23种设计模式，命令模式的概念优缺点以及JAVA代码举例

命令模式是一种行为设计模式，它将请求或简单操作封装为一个对象。这种模式允许用户通过调用对象来参数化其他对象的方法，并能保存、排队和执行方法调用。概念命令（Command）：定义执行操作的接口。具体命令（Concrete Command）：实现命令接口，并调用接收者的操作。调用者（Invoke...

uniapp上传图片前端以及java后端代码实现

最近在做uniapp相关的开发，在上传图片的时候遇到了一些问题，所幸经过一些努力，解决开发过程中遇到的困难，记录一下uniapp上传图片的实现过程 1、前端代码 setPic1: function() { var me = this; ...

视觉智能平台在uniapp中调用图像识别api，要在java里面写那些请求签名的代码是吗？

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