Design and implementation of Java graduate academic certificate system (source code + lw + deployment documents + explanation, etc.)

Blogger Introduction: ?300,000+ fans across the entire network, csdn guest author, blog expert, CSDN Rising Star Program mentor, high-quality creator in the Java field, Blog Star, Nuggets / Huawei Cloud / Alibaba Cloud / InfoQ and other platforms are high-quality authors, focusing on the field of Java technology and practical graduation projects? Contact for source […]

API Gateway: How to create a system facade?

Table of Contents Preface 1. Gateway Concept 2. The role of API gateway 3. How to implement API gateway Summarize Foreword The function of the API gateway is to bring together the APIs provided by various services to the outside world, so that the outside world looks like a unified interface, and it can also […]

Cascade.MERGE is finally tested successfully

There is a many-to-many relationship between User and Role. Just use Cascade.MERGE for cascade. Role will have some initial data saved when the system starts, and can be added again. User can be bound to these Roles. Role will not be affected when User is deleted. Below is the relevant code for the experiment, which […]

Solution: OpenCV Error: Assertion failed (!empty()) in cv::CascadeClassifier::detectMultiScale,

Table of Contents Solution: OpenCV Error: Assertion failed (!empty()) in cv::CascadeClassifier::detectMultiScale Failed to load classifier file: File is empty: OpenCV version is incompatible: Missing dependent libraries: Practical application scenarios: Solution: OpenCV Error: Assertion failed (!empty()) in cv::CascadeClassifier::detectMultiScale Recently, in the process of using OpenCV for face detection, I encountered an error: “OpenCV Error: Assertion failed […]

[Python Ocean Topic Seventeen] Read decades of OHC data and draw four-season charts

Contents of this issue Read years of data and draw four-season charts Part01. Years of data processing picture Multi-year average OHC distribution picture four Seasons: ohc_all_new = np.reshape(ohc_new, (12, 80, 29, 27), order=C’) ohc_all_season_mean = np.mean(ohc_all_new, axis=1) ohc_season = np.reshape(ohc_all_season_mean, (3, 4, 29, 27), C’) ohc_season_mean = np.mean(ohc_season, axis=0) I don’t see much change! Don’t […]

Build your own academic voice assistant (1)

Background: After the large model came out, the voice assistant upgraded its buffer by leveraging LLM’s improved semantic understanding and knowledge organization capabilities. Then when using these voice assistants, I always feel that something is missing, but I can’t tell what exactly is missing. I suddenly had an inspiration in my thinking these days. What […]

Java exports to excel with two-level cascade verification

import java.io.FileOutputStream; import java.util.HashMap; import java.util.Map; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.DataValidation; import org.apache.poi.ss.usermodel.DataValidationConstraint; import org.apache.poi.ss.usermodel.Name; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.usermodel.Sheet; import org.apache.poi.ss.usermodel.Workbook; import org.apache.poi.ss.util.CellRangeAddressList; import org.apache.poi.util.IOUtils; import org.apache.poi.xssf.usermodel.XSSFDataValidation; import org.apache.poi.xssf.usermodel.XSSFDataValidationConstraint; import org.apache.poi.xssf.usermodel.XSSFDataValidationHelper; import org.apache.poi.xssf.usermodel.XSSFSheet; import org.apache.poi.xssf.usermodel.XSSFWorkbook; public class ExcelDemo2 { public static void main(String[] args) { Cascade(); } public static void Cascade() { String fileName = “test02.xlsx”; […]