Application case analysis of the technical principle of "JXL" framework in the Java class library
JXL (Java Excel Api) is a Java class library for operating Excel files. It provides rich functions and methods to read, write and modify Excel files.This article will analyze the application cases of the JXL framework technical principles and provide relevant Java code examples.
1. JXL framework technical principle introduction:
The JXL framework is developed based on the Java language. It uses the various characteristics and functions of the Java programming language to implement the reading and writing operation of the Excel file.The JXL framework provides developers with a convenient operation of Excel files with simple, easy -to -use and efficient design concepts.
2. Application cases of JXL framework technical principles:
The following is a case of reading and writing with the JXL framework.
import jxl.*;
import jxl.write.*;
import java.io.*;
public class ExcelIOExample {
public static void main(String[] args) {
try {
// Create a workbook object
Workbook workbook = Workbook.getWorkbook(new File("input.xls"));
// Read the worksheet in Excel file
Sheet sheet = workbook.getSheet(0);
// Get the cell data in the worksheet
Cell cell1 = sheet.getCell(0, 0);
Cell cell2 = sheet.getCell(1, 0);
// Print cell data
System.out.println(cell1.getContents());
System.out.println(cell2.getContents());
System.out.println("----------------------------");
// Create a new Excel file
WritableWorkbook newWorkbook = Workbook.createWorkbook(new File("output.xls"));
// Create a worksheet and set the name
WritableSheet newSheet = newWorkbook.createSheet("Sheet1", 0);
// Write into the data to the worksheet
Label label1 = new Label(0, 0, "Hello");
Label label2 = new Label(1, 0, "World");
newSheet.addCell(label1);
newSheet.addCell(label2);
// Write and close the workbook object
newWorkbook.write();
newWorkbook.close();
System.out.println("Excel file has been created successfully!");
} catch (Exception e) {
e.printStackTrace();
}
}
}
The above example code demonstrates how to use the JXL framework to read and write to the excel file.First, open the `input.xls` file through the method of` Workbook.getworkbook () `and get the first worksheet.Then use the method of `sheet.getcell ()` to obtain data in the cell and print output.
Next, create a new workbook through the method of `workbook.createworkbook ()` and create a new worksheet using the `createdSheet ()` method.Use the `Label` class to create a tag object, and add the label to the worksheet through the` addcell () `method.
Finally, call the `write ()` method to write the data in the workbook into the new Excel file, and call the `Close ()" method to close the workbook.The output successfully creates the prompt information of the excel file.
3. Summary:
This article analyzes the application cases of the JXL framework technical principle, and provides example code for reading and writing with the JXL framework.The JXL framework realizes the operation of the Excel file by simple and easy to use, providing developers with convenient Excel data processing tools.Developers can flexibly use the JXL framework to achieve more complex Excel operating functions according to their needs.
