Article Tags
Article Tags
How to solve the problem that Maven dependencies cannot be resolved during Jenkins CI/CD build
The local build succeeds but the Jenkins pipeline fails. The fundamental reason is that Maven preferentially uses the warehouse address configured in settings.
Mar 02, 2026 am 01:45 AM
How to Make an HTTP Request from a Java Application? (Networking)
The simplest GET of HttpURLConnection requires manual setting of the method, timeout, and calling connect() to trigger the request. The response stream must be read to prevent reuse failure; Java11 recommends HttpClient, but does not redirect by default; OkHttp is more active and easier to use than ApacheHttpClient.
Mar 02, 2026 am 01:33 AM
Implementing multi-version regular verification strategy for object fields in Java
This article introduces how to support multiple clients' respective regular verification rules for the same Java field (such as registration) without adding new fields. Dynamic verification at runtime replaces static annotations at compile time, taking into account flexibility and maintainability.
Mar 02, 2026 am 01:06 AM
Java string data processing: batch modify student grades and exclude specific records
This article describes how to process string data containing student names, IDs, and grades in Java. By parsing strings, traversing records and making conditional judgments, the grades of all students except the students with specified IDs can be reduced in batches. The article will elaborate on the application of string segmentation, data type conversion, and conditional logic, and provide clear code examples and precautions to help readers master such data processing skills.
Mar 02, 2026 am 12:57 AM
Apache Beam KafkaIO Error Handling and Retry Mechanism Practical Guide
This article explains in detail how to build a robust error handling and retry mechanism for KafkaIO Reader and Writer in the Apache Beam pipeline, focusing on the industrial-grade solution based on Side Outputs and Asgarde library, adapted to Flink Runner.
Mar 02, 2026 am 12:51 AM
How to correctly understand the memory management of objects returned in stateless session beans
In EJB stateless session beans, objects (such as DTOs) created and returned within methods do not need to manually clean up references; as long as the caller no longer holds their references, these objects can be recycled normally by the JVM, and memory leaks will not be caused by the Bean instance resident in the pool.
Mar 02, 2026 am 12:39 AM
Solutions to type conversion warnings in Java generic nested classes: taking the equals method as an example
This article explores unchecked conversion warnings you may encounter when performing type conversions in the equals method when nesting non-static inner classes within a Java generic class. Regarding the Node class in LinkedList, we conducted an in-depth analysis of the causes of warnings and provided a solution using instanceof LinkedList.Node for safe type checking and conversion, aiming to help developers write more robust, warning-free generic code.
Mar 02, 2026 am 12:30 AM
Java String Compression Practice: Optimizing Repeat Character Counting and End Processing
This tutorial takes an in-depth look at the implementation of string compression (such as abbbccccc compressed to ab3c4) in Java. We will focus on analyzing common loop counting logic, and focus on solving the counting omission problem that easily occurs when processing consecutive characters at the end of a string. Help developers build robust and efficient string compression functions by providing optimized code examples and detailed explanations.
Mar 02, 2026 am 12:03 AM
Passing a custom object list between Android Activities: Implemented using the Gson library
This tutorial details how to use the Gson library to efficiently transfer ArrayList between different activities in Android applications. The article first explains the challenges faced when Intent directly transfers complex objects, and then explains in depth the working principle and specific implementation steps of Gson, including adding dependencies, preparing data classes, serialization in sending activities, and deserialization in receiving activities. It also provides complete sample code and precautions, aiming to help developers master a simple and reliable complex data transfer scheme.
Mar 01, 2026 am 11:09 AM
Tutorial on converting CSV data to XML attribute format in Java
This tutorial details how to convert data from a CSV file into XML format using Java, specifically mapping CSV column values to attributes of XML elements. By utilizing the JAXB (Java Architecture for XML Binding) framework, combined with POJO (Plain Old Java Object) and specific annotations, we can achieve this conversion efficiently and accurately, avoiding the generation of column values as independent XML sub-elements.
Mar 01, 2026 am 11:00 AM
Java Swing tutorial: Detailed explanation of JFormattedTextField size setting
JFormattedTextField inherits from JTextField, so its display width can be set through the setColumns() method. This article will introduce in detail how to use this method to specify column widths for JFormattedTextField to achieve custom size control and improve the flexibility of interface layout and user experience.
Mar 01, 2026 am 10:54 AM
Optimizing tile arrangement algorithm: improving efficiency and finding the shortest path
This article aims to explore how to optimize the solution algorithm for the "tile floor" problem. To address the efficiency bottleneck of existing depth-first search, we will introduce how to use breadth-first search (BFS) to ensure that the solution with the minimum number of exchanges is found and significantly improve performance. At the same time, the article will also elaborate on key technologies to reduce memory consumption and accelerate state operations by improving data structures (from String[][] to byte[]), so as to effectively handle larger-scale problems.
Mar 01, 2026 am 10:48 AM
Multi-data source configuration and heterogeneous database entity persistence practice in Quarkus applications
The Quarkus framework natively supports connecting and managing multiple databases of different types, such as PostgreSQL and MySQL, in a single application. This article will explain in detail how to configure multiple data sources in Quarkus, and achieve precise mapping and persistence operations between entities and specific databases by defining different persistence units (Persistence Units) to ensure that data flows to the correct target database.
Mar 01, 2026 am 10:42 AM
SpringBoot 2.7: Implement simplified configuration of controller's default JSON request and response
This article discusses how to implement all controllers to process JSON requests and responses by default in Spring Boot 2.7 applications through simple configuration. We will focus on the powerful function of @RestController annotation, which can automatically configure the API to consume and produce JSON data, thus avoiding repeated declaration of consumes and produces attributes on each method, greatly simplifying the development process and improving code readability.
Mar 01, 2026 am 10:21 AM
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