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Prerequisites Required developmant environment: IntelliJ IDEA MySQL 5.7.19 Tomcat 9 Maven 3.6 Required knowledge: Proficiency in MySQL, Spring, JavaWeb, and MyBatis, along with basic frontend skills. Database Initialization Create a schema for storing publication records: CREATE DATABASE `library_db`; USE `library_db`; DROP TABLE IF EXISTS ` ...

Key Distinctions Between BeanFactory and ApplicationContext Interface Hierarchy and Overview Both BeanFactory and ApplicationContext serve as core interfaces with in the Spring framework, functioning as containers for managing beans. Notably, ApplicationContext extends BeanFactory, inheriting its foundational capabilities while adding enhanced ...

@Intercepts({ @Signature(type = StatementHandler.class, method = "prepare", args = {Connection.class, Integer.class}) }) @Component public class SoftDeleteInterceptor implements Interceptor { @Override public Object intercept(Invocation invocation) throws Throwable { StatementHandler handler = (StatementHandler) in ...

Defining the Action Class Create a new Java class that extends nc.ui.uif2.NCAction. This class will contain the logic for your custom button. Ensure you have references to the model and editor components to interact with the UI state. package nc.ui.yrdmd.yrdsellorder.plugin.action; import java.awt.event.ActionEvent; import nc.ui.pub.beans.Mes ...

A production alert came in at midnight while the on-call engineer was asleep. After connecting to the environment, it became clear that one microservice was experiencing a steady increase in file descriptor usage, eventually leading to an OutOfMemoryError and service crash. This microservice establishes SSH connections during operation, and sin ...

Setting Up the HTTP Client A customized RestTemplate bean provides fine-graineed control over connection behavior. The configuration below binds a request factory with a timeout setting. import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.http.client.SimpleC ...

Java annotations are a foundational language feature that enable declarative programming—allowing developers to embed metadata directly into source code without altering runtime behavior. This capability powers frameworks, simplifies configuration, and enables compile-time and runtime introspection. Core Concepts An annotation is a special kind ...

Managing Third-Party Beans with IoC/DI Configuration ======================================================= This section demonstrates how to manage third-party beans using Spring's Inversion of Control (IoC) container. We'll use DruidDataSource and ComboPooledDataSource as examples. 1.1 Managing a Data Source Object 1.1.1 Environment Setup ...

The Spring Plugin library provides a core interface for building plugin-based architectures: package org.springframework.plugin.core; public interface Plugin<S> { boolean supports(S criteria); } Here is an implementation of this interface for a payment processing scenario. The PayByPaypal class defines the logic for PayPal transacti ...

This article walks through creating a Java web backend using the SSM stack (Spring, Spring MVC, MyBatis) with Maven, packaging it as a WAR, and deploying it to Tomcat. Common configuration pitfalls are highlighted along the way. 1. Create a WAR‑based Maven project Using your IDE, choose File → New → Maven Project → Create a simple project. Fill ...