Use the EasyExcel framework to generate a complex Excel report
Use the EasyExcel framework to generate a complex Excel report
Overview:
EasyExcel is a Java -specific open source framework that can be used to operate Excel files.It supports reading, writing and generating complex Excel reports.This article will introduce how to use the EasyExcel framework to generate complex Excel reports and provide the corresponding Java code example.
1. Environmental preparation
Before starting, you need to ensure that the following environment is ready:
-JAVA Development Environment (JDK)
-JAR bag in the EasyExcel framework
2. Create Excel data model
Before generating the Excel report, you need to create a data model.The data model is a Pojo (PLAIN OLD JAVA OBJECT) class, which is used to store data in Excel.Taking the student's performance report as an example, you can create a class called "StudentScore", which contains the following attributes:
public class StudentScore {
private String studentName;
private String subject;
private int score;
// omit the getter and setter method
}
3. Generate excel report
The process of generating the excel report using the EasyExcel framework in the Java code is as follows:
-Colon the EXCELWRITER object to write data to the Excel file:
ExcelWriter excelWriter = EasyExcel.write("report.xlsx", StudentScore.class).build();
-Colon the sheet object and specify the name of the sheet:
Sheet sheet = new Sheet(1, 0, StudentScore.class);
Sheet.setSheetName ("Report Report");
-Chime write head data:
List<List<String>> head = new ArrayList<>();
head.add (arrays.aslist ("student name", "subject", "grade");
excelWriter.write(head, sheet);
-Chimonize the results of the student students:
List<StudentScore> dataList = new ArrayList<>();
// Assume that there is a list called "StudentScoreList" contains student performance data
for (StudentScore studentScore : studentScoreList) {
dataList.add(Arrays.asList(studentScore.getStudentName(), studentScore.getSubject(), studentScore.getScore()));
}
excelWriter.write(dataList, sheet);
-Chew the writing and close the ExcelWriter object:
excelWriter.finish();
Complete Java code examples are as follows: below:
import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.write.metadata.WriteSheet;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class ExcelGenerator {
public static void main(String[] args) {
// Create an excelwriter object
ExcelWriter excelWriter = EasyExcel.write("report.xlsx", StudentScore.class).build();
// Create a sheet object
WriteSheet sheet = EasyExcel.writersheet (). SheetName ("" Report Report ") .build ();
// Write the header data
List<List<String>> head = new ArrayList<>();
head.add (arrays.aslist ("student name", "subject", "grade");
excelWriter.write(head, sheet);
// Write the scientific student performance data
List<StudentScore> dataList = new ArrayList<>();
// Assume that there is a list called "StudentScoreList" contains student performance data
for (StudentScore studentScore : studentScoreList) {
dataList.add(Arrays.asList(studentScore.getStudentName(), studentScore.getSubject(), studentScore.getScore()));
}
excelWriter.write(dataList, sheet);
// Complete the writing and close the ExcelWriter object
excelWriter.finish();
}
}
Summarize:
Through the EasyExcel framework, we can easily generate complex Excel reports.By defining data models, creating Excelwriter objects, and writing data, we can easily generate Excel reports containing heads and data.Through the above steps, you can customize a variety of complex Excel reports according to specific needs.
