Use the CLJ Excel framework to realize the instance tutorial of data import and export

Implement the exported instance tutorial through the CLJ Excel framework CLJ Excel is a convenient and simple CLOJURE library for processing and exporting the Excel file.It is based on the Apache Poi library and provides a set of simple and easy -to -use functions and macro processing Excel files and data. In this tutorial, we will learn how to use the CLJ Excel library to achieve data import and export. Import Data: The first step is to import the CLJ Excel library.First, add the following dependencies in the project's `Project.clj` file: clojure [clj-excel "0.4.1"] Then, use the `Require` instruction to import library: clojure (ns my-namespace (:require [clj-excel.core :as x])) Now we can start to import data.First, we need to specify the path of the Excel file to be read.Suppose our excel file is located in the `data.xlsx` in the project root directory: clojure (def input-file "data.xlsx") Next, we can read the content of the excel file with the `Read-Excel` function.This function returns a hash map composed of multiple tables, where each table is a two -dimensional vector composed of lines and columns.The following is an example code: clojure (defn import-data [] (let [data (x/read-excel input-file)] (println "Contents of Excel file:") (doseq [sheet (keys data)] (let [rows (get-in data [sheet])] (println (str "Sheet: " sheet)) (doseq [row rows] (println row)))) data)) The above code will print the content of the Excel file and return a hash mapping containing all table data. export data: To export data to the Excel file, we first need to prepare the data to be exported.Suppose we have a vector called `data`, which contains data to be exported.Data is a two -dimensional vector, and each internal vector represents a line in the Excel table. clojure (def data [["Name" "Age"] ["John" 25] ["Jane" 30] ["Tom" 35]]) Next, we can export the data to Excel files with the `WRITE-EXCEL` function.We need to specify the data to be exported and the path of the Excel file to be generated.The following is an example code: clojure (defn export-data [output-file data] (x/write-excel output-file {:sheet1 data})) The above code exports the data to a table named `sheet1`, and saves the result as the specified Excel file. The complete example code is as follows: clojure (ns my-namespace (:require [clj-excel.core :as x])) (def input-file "data.xlsx") (defn import-data [] (let [data (x/read-excel input-file)] (println "Contents of Excel file:") (doseq [sheet (keys data)] (let [rows (get-in data [sheet])] (println (str "Sheet: " sheet)) (doseq [row rows] (println row)))) data)) (def data [["Name" "Age"] ["John" 25] ["Jane" 30] ["Tom" 35]]) (defn export-data [output-file data] (x/write-excel output-file {:sheet1 data})) (export-data "output.xlsx" data) (import-data) Through the above example code, we can easily use the CLJ Excel library to implement the import and export function of Excel files.You can modify the code according to your needs and adjust according to the specific scene. The above is the instance tutorial that is introduced and exported with the CLJ Excel framework.I hope this article can help you use the CLJ Excel library to handle the import and export operation of Excel files.