JXLS Framework Introduction and Usage Guide
JXLS Framework Introduction and Usage Guide
JXLS is a Java -based open source electronic table processing framework. It provides a convenient and fast way to generate and read the Microsoft Excel electronic table file.Whether it is reporting, data export, or formula filling, JXLS is a powerful and flexible tool.
The core features of JXLS include:
1. Template engine: Use Excel templates to generate, fill, and format data.The template can include formulas, styles, condition formats and other Excel functions.
2. Data driver: You can provide data sources in various ways, such as Java collection, database query results set or JSON data.You can use the labels and functions provided by JXLS to process data in the data source.
3. Export options: Support exports to multiple formats, including Excel, CSV, HTML, etc., which can be flexibly selected according to demand.
4. Thread security: The JXLS framework is designed as a thread security, which can be used in multi -threaded environments to improve performance and efficiency.
5. Height customization: Custom labels and functions can be created as needed, and it is integrated into the JXLS framework.
The following is the basic usage guide of the JXLS framework:
1. Install the JXLS framework: use Maven or manually download the jxls framework JAR file and add it to the ClassPath of the Java project.
2. Create Excel template: Use Microsoft Excel to create a template file (.xls or .xlsx format), and add the corresponding place occupies in the position that needs to be filled.You can use the labels and functions provided by JXLS to process data in the data source.
3. Prepare data sources: According to the need, obtain data from the Java set, database query results set or JSON data source, etc., stored in the appropriate data structure.
4. Create JXLS context: Use the Context class provided by JXLS to create a context object, and add the data source to the context.
5. Generate Excel file according to the template: Load the Excel template file with the WorkbookTemplate class provided by JXLS and fill in the data with the context.You can then write the generated workbook to the file, output stream or directly download it to the client.
The following is a simple example to demonstrate how to use the JXLS framework to generate Excel files:
import org.jxls.common.Context;
import org.jxls.util.JxlsHelper;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.List;
public class JxlsExample {
public static void main(String[] args) throws IOException {
try (InputStream template = JxlsExample.class.getResourceAsStream("/template.xls");
OutputStream output = new FileOutputStream("output.xls")) {
// Prepare data
List<String> names = Arrays.asList("Alice", "Bob", "Charlie");
// Create jxls context
Context context = new Context();
context.putVar("names", names);
// Generate excel files according to the template
JxlsHelper.getInstance().processTemplate(template, output, context);
}
}
}
In the above example, we use a template file Template.xls to generate the excel file and add a data source called "names" to the context.By calling the `ProcessSessterMPlate () method, we can fill the data source into the template and write the results into the Output.xls file.
Summarize:
The JXLS framework is a functional and easy -to -use open source electronic table processing framework.It provides a convenient way to generate and read Excel files and support multiple export options.By using JXLS, you can easily implement custom reporting and data export functions.
