Use the Excel Templator library in the Java class library for batch data guidance
Use the Excel Templator library in the Java class library for batch data guidance
Java is a widely used programming language, with rich class libraries to meet various development needs.In terms of data processing, Java provides multiple class libraries to help developers perform data import and export operations.Among them, the Excel Templater library is a very useful tool that helps developers to import and export Excel files in batches.
First, we need to introduce the dependencies of the Excel Templateer library in the project.You can add corresponding dependencies through building tools such as Maven or Gradle.The following is a maven dependency configuration:
<dependency>
<groupId>org.kritikal.fabric</groupId>
<artifactId>exceltemplater</artifactId>
<version>2.1.7</version>
</dependency>
Once the dependencies are added, you can start using the excel tester library for data introduction.
First of all, we need to create an Excel template that contains the positioning of the data to be imported.You can create an example template in Excel, and use the place occupied symbols at the position where you need to insert the data, such as "$ {name}".
Next, we can load the template file with the excel tester library and fill the data to the corresponding position.The following is a simple example code:
import org.kritikal.fabric.excel.annotations.ExcelDetails;
import org.kritikal.fabric.excel.annotations.ExcelField;
import java.util.ArrayList;
import java.util.List;
@ExcelDetails(
dictTitle = "Student Info",
ofInterest = true,
hasHeader = true
)
public class Student {
@ExcelField(columnName = "Name")
private String name;
@ExcelField(columnName = "Age")
private int age;
// getters and setters
// Used to generate the static method of the sample data
public static List<Student> generateData() {
List<Student> students = new ArrayList<>();
students.add(new Student("Tom", 20));
students.add(new Student("Jerry", 22));
return students;
}
public Student(String name, int age) {
this.name = name;
this.age = age;
}
}
public class ExcelTemplaterExample {
public static void main(String[] args) {
// Load the excel template file
ExcelTemplater<Student> templater = new ExcelTemplater<>(Student.class);
templater.loadTemplate("path/to/template.xlsx");
// Get the data to be filled
List<Student> students = Student.generateData();
// Fill in data to the template
templater.fillData(students);
// Save the filled file
templater.saveFilledTemplate("path/to/filledTemplate.xlsx");
}
}
In the above example code, we created a Java class called "Student" to represent students' information.By using Excellield annotations in this class, we can specify the corresponding excel name.
In the Main method, we created an ExcelTemplator instance and loaded the Excel template file we created before.Then, we generated some example student data and used the FillData method to fill the data into the template.Finally, we save the filled files after the SaveFilledTemplate method.
By using the excel tester library, we can easily import the excel file in batches and flexibly control the filling position and style of the data.This is very useful for applications that need to be imported by large amounts of data.
I hope this article will help you understand how to use the Excel Templator library in the Java class library for batch data guidance!
