Application of the CLJ Excel framework in data processing

Application of the CLJ Excel framework in data processing Overview: CLJ Excel is a Java -based open source framework that provides the ability to process Excel files in the Clojure programming language.It is based on the Apache Poi library. Through simple and powerful APIs, developers can easily read, write and operate data in the Excel file.This article will introduce the application of the CLJ Excel framework in data processing and provide some Java code examples. 1. Read the excel file The CLJ Excel framework provides the function of reading Excel files.Developers can use the `Read-XLSX` function to read an excel file in an XLSX format and return a data structure that represents the entire Excel document.The following is an example code: (ns excel-handler (:require [clojure.java.io :as io] [clj-excel.core :as excel])) (defn read-excel [file] (let [workbook (excel/read-xlsx (io/file file))] (doseq [sheet (.sheetIterator workbook)] (doseq [row (.rowIterator sheet)] (doseq [cell (.cellIterator row)] (println (.getStringCellValue cell))))))) In the above code, first we use the `Clojure.java.io` library to process the file input and output.Then, read the excel file with the `Read-Xlsx` function in the` ClJ-EXCEL. Core` Library and return a Workbook object.Through the lines and cells in the workheet object, we can obtain and process the data in the Excel file. 2. Write into Excel file In addition to reading Excel files, the CLJ Excel framework also provides the function of writing the excel file.Developers can use the `WRITE-XLSX` function to create an excel file in XLSX format and write the data into it.The following is an example code: (ns excel-handler (:require [clj-excel.core :as excel])) (defn write-excel [file] (let [workbook (excel/create-workbook (excel/create-sheet "Sheet1" [["Name" "Age"] ["John" 25] ["Alice" 30]])) output-stream (clojure.java.io/output-stream file)] (excel/write-xlsx output-stream workbook))) In the above code, we first use the `Create-SHEET` function to create a worksheet object, and set table names and table data.Then use the `Create-Workbook` function to create a workbook object and add the working meter object to it.Finally, write the workbook object into the file by calling the `WRITE-XLSX` function. in conclusion: The CLJ Excel framework is a powerful and easy -to -use tool for processing Excel files in the Clojure programming language.By providing functions that read and write to Excel files, and flexible data processing functions, developers can easily perform Excel data operations and analysis.Whether it is reading the existing Excel file or creating a new Excel file, CLJ Excel can meet various data processing needs, enabling developers to process Excel data more efficiently. Please note that the above example code is only to illustrate the application of the CLJ Excel framework in data processing, not a complete code implementation.The specific code implementation may require appropriate modification and supplementation according to actual needs. references: -CLJ Excel official document: https://github.com/yushiomote/Clj- Excel