Learn about the technical principles and advantages of the "JXL" framework in the Java class library
JXL, the full name of the Java Excel API, is a Java class library for reading and writing Excel files.It provides a set of easy -to -use APIs that allow developers to easily operate Excel files in Java applications.The technical principles and advantages of JXL are described below.
1. Technical principles:
-It is easy to use: JXL provides an API that is easy to understand and use, allowing developers to quickly use and perform Excel file operations.
-The compatibility: JXL supports the Excel file format of reading and writing standards, which can be compatible with the Excel 97-2007 version.
-Al lightweight: JXL is a lightweight library, which only contains some basic Excel operating functions, which is suitable for processing small and medium Excel files.
2. Advantage:
-The read and write Excel file: JXL can read and write the content of the excel file, including cells, lines, columns, tables, etc.
-Coloning and editing workbooks: Developers can use JXL to create a new workbook, or open and edit the existing workbook.
-Format cells: JXL supports formatting the Excel cell, including setting text, numbers, and date formats.
-Excel formula: JXL can handle Excel formula and automatically calculate the formula results during the reading and writing process.
-F chart and graphic: JXL can create, modify and delete the chart and graphic objects in Excel.
-Data verification: JXL allows settings and verification data in Excel cells, including numerical limitation, text length, etc.
-In import export: JXL supports import data from Excel to database, or guide data from database to Excel.
-Agly: JXL can insert, adjust the size, and delete the picture in Excel.
Below are some Java code examples read and write to the Excel file using the JXL library:
import jxl.*;
import jxl.write.*;
public class ExcelReadWriteExample {
public static void main(String[] args) {
try {
// Read the excel file
Workbook workbook = Workbook.getWorkbook(new File("input.xls"));
Sheet sheet = workbook.getSheet(0);
Cell cell1 = sheet.getCell(0, 0);
System.out.println ("Contents:" + Cell1.getContents ());
// Create a new Excel file and write content
WritableWorkbook writableWorkbook = Workbook.createWorkbook(new File("output.xls"));
WritableSheet writableSheet = writableWorkbook.createSheet("Sheet1", 0);
Label label = new Label(0, 0, "Hello JXL");
writableSheet.addCell(label);
writableWorkbook.write();
writableWorkbook.close();
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
The above example demonstrates how to use the JXL class library to read the Excel file named "Input.xls" and print out the content of the first cell.Then, create a new Excel file called "Output.xls", and write "Hello Jxl" to the first cell.
In general, the JXL class library provides a simple and effective method to handle the excel file, enabling developers to flexibly read and write Excel data and perform various operations.Demand of Excel files.
