Analysis of the technical principles of the "JXL" framework in the Java class library
JXL is an open source Excel reading and writing framework for Java language.As part of the Java library, the JXL framework follows the following technical principles.
1. Simple and easy to use: JXL framework aims to provide a simple and easy way to read and write Excel files.It provides a simple API, enabling developers to easily operate the Excel file without too much configuration and complex code.
2. Cross -platform compatibility: The JXL framework can run on multiple platforms, including Windows, Linux and Mac OS.Developers can use the same JXL code on different operating systems to read and write Excel files without having to care about the differences in the platform.
3. Rich function: The JXL framework supports various operations read and write to the Excel file, including creating, editing, deleting and copying worksheets, and setting cell styles, merging cells, inserting pictures, etc.Developers can use these functions to meet different business needs.
Below is an example code that reads the excel file with the JXL framework:
import jxl.Workbook;
import jxl.Sheet;
import jxl.Cell;
import jxl.read.biff.BiffException;
import java.io.File;
import java.io.IOException;
public class ExcelReader {
public static void main(String[] args) {
try {
// Open the excel file
Workbook workbook = Workbook.getWorkbook(new File("input.xls"));
// Get the first worksheet
Sheet sheet = workbook.getSheet(0);
// All lines and columns in the worksheet
for (int i = 0; i < sheet.getRows(); i++) {
for (int j = 0; j < sheet.getColumns(); j++) {
Cell cell = sheet.getCell(j, i);
System.out.print(cell.getContents() + "\t");
}
System.out.println();
}
// Close the excel file
workbook.close();
} catch (IOException | BiffException e) {
e.printStackTrace();
}
}
}
The above code demonstrates how to read the data in the Excel file with the JXL framework.It first opens an Excel file named "Input.xls", and then obtains the first worksheet.Next, use nested cycles to traverse all rows and columns in the worksheet, and use the getcell () method to obtain the content of each cell and print output.Finally, close the excel file.
Summary: The JXL framework follows the technical principles of simple and easy -to -use, cross -platform compatibility, and rich functions, so that Java developers can easily read and write Excel files.Through a simple example code, how to read the data in the Excel file with the JXL framework.
