Excel template framework in the Java class library
Excel template framework is a very useful tool in the Java class library, which can help developers generate and operate Excel files in the Java application.Using the Excel template framework, developers can create, fill and formatize Excel files through the predetermined Excel templates, which greatly simplifies the generating process of excel files.
The most commonly used class library of Excel template framework is Apache Poi.Apache Poi is an open source Java class library that provides many interfaces for operating Microsoft Office formats.It supports the function of the Excel file and can be seamlessly integrated with the Java application.By using Apache Poi, developers can easily read, write and edit Excel files.
Below is a simple Java code example based on Apache Poi. It shows how to use the Excel template framework to generate an Excel file containing data:
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import java.io.FileOutputStream;
import java.io.IOException;
public class ExcelTemplateExample {
public static void main(String[] args) {
try (Workbook workbook = new XSSFWorkbook()) {
Sheet sheet = workbook.createSheet("Sheet1");
// Create a title line
Row headerRow = sheet.createRow(0);
Cell headerCell1 = headerRow.createCell(0);
headerCell1.setCellValue("Name");
Cell headerCell2 = headerRow.createCell(1);
headerCell2.setCellValue("Age");
// Create a data line
Row dataRow = sheet.createRow(1);
Cell dataCell1 = dataRow.createCell(0);
dataCell1.setCellValue("John Doe");
Cell dataCell2 = dataRow.createCell(1);
dataCell2.setCellValue(30);
// Save the excel file
try (FileOutputStream outputStream = new FileOutputStream("example.xlsx")) {
workbook.write(outputStream);
System.out.println ("EXCEL files are successful!"););
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
In this example, we first created a Workbook object, which is the container of the excel file.Then, we created a sheet object in Workbook, representing a worksheet in the Excel file.Next, we created title lines and data rows, and set the value of cells with the SetcellValue method.Finally, we wrote the Workbook object into the file with FileoutPutStream to generate an Excel file containing data.
By using the Excel template framework, developers can customize the style and format of Excel files according to actual needs, and can easily generate complex Excel reports.Excel template framework provides rich APIs that can process high -level functions such as merging cells, setting cell styles, and adding charts.Whether it is to generate simple data tables or create complex reports, the Excel template framework can meet the needs of developers.
