Application instance of the Excel Templateer framework in the Java class library
Application instance of the Excel Templateer framework in the Java class library
Excel Templater is an open source Java class library that provides a simple and powerful way to generate Excel documents.This article will introduce the actual application of the Excel Templateer framework in the Java class library.
The main feature of the Excel Templateer framework is that it can automatically generate an Excel document with dynamic data according to the excel template file.By defining template files, we can set some fixed formats, styles and formulas in advance, and then use the Java code to pass the data to the template, and finally generate an excel document with the same format and style.
Below we will demonstrate the use of the Excel Templateer framework through an example.
Suppose we need to generate an Excel document for a sales report.Our Excel template file contains title lines, sales data forms, and a summary form.Our goal is to fill the specific sales data into the data table and calculate the corresponding summary data based on the data.
First of all, we need to create an Excel template file that includes title lines, data tables and summary forms, and named it "Sales_template.xlsx".
Next, we use the Java code to generate Excel documents.We first introduce the dependencies of the Excel Templator framework and create a Java class to complete the generation process.
import org.jxls.common.Context;
import org.jxls.util.JxlsHelper;
import java.io.*;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class SalesReportGenerator {
public static void main(String[] args) {
try {
// Load the template file
InputStream templateInputStream = new FileInputStream("sales_template.xlsx");
OutputStream outputStream = new FileOutputStream("sales_report.xlsx");
// Prepare data
List<Sale> sales = new ArrayList<>();
sales.add(new Sale("Product 1", 100, 10));
sales.add(new Sale("Product 2", 200, 15));
sales.add(new Sale("Product 3", 300, 20));
// Prepare the context object
Map<String, Object> data = new HashMap<>();
data.put("sales", sales);
// Generate excel documentation
Context context = new Context(data);
JxlsHelper.getInstance().processTemplate(templateInputStream, outputStream, context);
// Close the input output stream
templateInputStream.close();
outputStream.close();
System.out.println("Sales report generated successfully!");
} catch (IOException e) {
e.printStackTrace();
}
}
public static class Sale {
private String product;
private int quantity;
private int price;
public Sale(String product, int quantity, int price) {
this.product = product;
this.quantity = quantity;
this.price = price;
}
public String getProduct() {
return product;
}
public int getQuantity() {
return quantity;
}
public int getPrice() {
return price;
}
public int getTotal() {
return quantity * price;
}
}
}
In the above code, we first load the template file and then prepare the data.We use an internal class called Sale to represent sales data, including the product name, quantity and price, and a method of calculating the total price.
Next, we create a Context object and put the data into it.Finally, by calling the ProcessSessterMPlate method of the JXLSHELPER class, the template file, output stream, and context objects are passed to the Excel Templateer framework to generate the final Excel document.
After running the above code, we will get an Excel document called "Sales_report.xlsx", which shows a form that fills the specific sales data and the calculated summary data.
Summarize:
This article introduces the application instance of the Excel Templateer framework in the Java class library.Through simple Java code, we can use the Excel Templateer framework to generate an Excel document with dynamic data to achieve various practical application needs.This method can greatly improve the production efficiency and flexibility of the Excel documentation. It is a powerful tool for processing Excel reports in Java development.
