Easyexcel complex data export

Export data for work , Export to excel The format is as follows ：
demand 1： Suppose there is A、B staff , Then it's equivalent to having two worksheets 【sheet】
demand 2： hypothesis A Employees should show their salary for one year , Want the same worksheet 【sheet】 You have to have multiple watches

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Then, first of all, dedicate EasyExcel Language sparrow perhaps EasyExcel Official website
The official website I first read , But the official website doesn't write as much as YuQue . But I can't stand the simplicity of the official website . Um. … I think it's simple

One 、 Write an entity class according to the document

package com.admin.ctt.entity.excelPojo;

import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.annotation.write.style.ColumnWidth;
import com.alibaba.excel.annotation.write.style.ContentRowHeight;
import com.alibaba.excel.annotation.write.style.HeadRowHeight;
import lombok.Data;
import lombok.EqualsAndHashCode;

import java.util.Date;

/** *  Export the contract Commission and performance of employees  * @author LunarYouI * @create 2022-06-28 17:05 */

@Data
@EqualsAndHashCode
// The height of all titles 
@HeadRowHeight(30)
// The height of all content 
@ContentRowHeight(25)
// All cell column widths 
@ColumnWidth(25)
public class EmployeeSalaryPojo {
    
// @ColumnWidth(50) // Specify a cell column width 
// @ExcelProperty({" Employee payroll ", " title 1", " Contract royalty / The performance of ", " String title "})
// private String string;
//
// @ExcelProperty({" Employee payroll ", " title 1", " Contract royalty / The performance of ", " Date title "})
// private Date date;
//
// @ExcelProperty({" Employee payroll ", " title 1", " Contract royalty / The performance of ", " Digital title "})
// private Double doubleData;

    // Employee name 
    private String name;
    // Employee date 
    private Date date;
    // Wages 
    private Double doubleData;
}

Two 、 Refer to the two methods written in the document , Namely title And data

• Here I define two people , They are Wang 、 Li Mou , Two for each sheet

/** *  data  * LunarYouI */
	private static List<EmployeeSalaryPojo> data() {
    
		List<EmployeeSalaryPojo> list = new ArrayList<>();
		for (int i = 0; i < 10; i++) {
    
			EmployeeSalaryPojo data = new EmployeeSalaryPojo();
			data.setName(" Sb. " + i);
			data.setDate(new Date());
			data.setDoubleData(0.56);
			list.add(data);
		}
		return list;
	}

	/** *  title  * @return */
	private static Map<String, List<List<String>>> head() {
    
		String a = " Administrators ： zhang   Wage time ：2022.01  Position ： staff / Executor   full name ： Wang mou ";
		String b = " Administrators ： Li Mou   Wage time ：2022.01  Position ： staff / Executor   full name ： Li Mou ";
		Map<String, List<List<String>>> mp = new HashMap<>();
		/** *  people 1 */
		List<List<String>> head = new ArrayList<>();
		List<String> list1 = new ArrayList<>();
		list1.add(" Employee payroll ");
		list1.add(a);
		list1.add(" Contract royalty / The performance of ");
		list1.add(" Employee name ");
		head.add(list1);
		List<String> list2 = new ArrayList<>();
		list2.add(" Employee payroll ");
		list2.add(a);
		list2.add(" Contract royalty / The performance of ");
		list2.add(" Employee date ");
		head.add(list2);
		List<String> list3 = new ArrayList<>();
		list3.add(" Employee payroll ");
		list3.add(a);
		list3.add(" Contract royalty / The performance of ");
		list3.add(" Wages ");
		head.add(list3);
		mp.put("r1",head);
		/** *  people 2 */
		List<List<String>> head1 = new ArrayList<>();
		List<String> list4 = new ArrayList<>();
		list4.add(" Employee payroll ");
		list4.add(b);
		list4.add(" Contract royalty / The performance of ");
		list4.add(" Employee name ");
		head1.add(list4);
		List<String> list5 = new ArrayList<>();
		list5.add(" Employee payroll ");
		list5.add(b);
		list5.add(" Contract royalty / The performance of ");
		list5.add(" Employee date ");
		head1.add(list5);
		List<String> list6 = new ArrayList<>();
		list6.add(" Employee payroll ");
		list6.add(b);
		list6.add(" Contract royalty / The performance of ");
		list6.add(" Wages ");
		head1.add(list6);
		mp.put("r2",head1);
		return mp;
	}

3、 ... and 、【 Multiple sheet】 reference EasyExcel The official website exports data in different sheet On

	public static void simpleWrite() {
    
		ExcelWriter excelWriter = null;
		//  Method 2:  If you write different sheet  Same object 
		String fileName = "F:\\temporary\\" + "repeatedWrite" + System.currentTimeMillis() + ".xlsx";
		//  here   Specified file 
		try {
    
			excelWriter = EasyExcel.write(fileName, EmployeeSalaryPojo.class).build();
			//  To call write , Here I call five times , The actual usage is based on the total number of pages in the database . This will eventually write 5 individual sheet Inside 
			for (int i = 0; i < 5; i++) {
    
				//  Create... Every time writeSheet  Note here that you must specify sheetNo  and sheetName It has to be different 
				WriteSheet writeSheet = EasyExcel.writerSheet(i, " Templates " + i).build();
				// Write to excel Space a few lines with the top 
				writeSheet.setRelativeHeadRowIndex(1);
				//  Paging to the database to query data   Here you can go to the database to query the data of each page 
				List<EmployeeSalaryPojo> data = data();
				excelWriter.write(data, writeSheet);
			}
		} finally {
    
			if(excelWriter!=null){
    
				excelWriter.finish();
			}
		}
	}

here No title Because EmployeeSalaryPojo Entity class The first three fields in are notes 了 , Untie the first three notes The last three are ok

Four 、【 same sheet Multiple tables 】

public static void simpleWrite() {
    
		ExcelWriter excelWriter = null;
		//  Method 2:  If you write different sheet  Same object 
		String fileName = "F:\\temporary\\" + "repeatedWrite" + System.currentTimeMillis() + ".xlsx";
		//  here   Specified file 
		try {
    
			excelWriter = EasyExcel.write(fileName, EmployeeSalaryPojo.class).build();
			//  hold sheet Set to no header   Otherwise it will output sheet The head of the   So it looks like the first table  There is 2 It's a head 
			WriteSheet writeSheet = EasyExcel.writerSheet(" Templates ").needHead(Boolean.FALSE).build();
			// One line away from the top 
			writeSheet.setRelativeHeadRowIndex(10);
			//  You must specify a header here ,table  Will inherit sheet Configuration of ,sheet The configuration does not require ,table  By default, you don't need 
			WriteTable writeTable0 = EasyExcel.writerTable(0).needHead(Boolean.TRUE).build();
			WriteTable writeTable1 = EasyExcel.writerTable(1).needHead(Boolean.TRUE).build();
			//  The first write creates a header 
			excelWriter.write(data(), writeSheet, writeTable0);
			//  The second write will also create a header , Then write data after the first time 
			excelWriter.write(data(), writeSheet, writeTable1);
		} finally {
    
			if(excelWriter!=null){
    
				excelWriter.finish();
			}
		}
	}

5、 ... and 、【Excel More than one of them sheet, And one sheet Multiple tables 】

	public static void simpleWrite() {
    
		ExcelWriter excelWriter = null;
		//  Method 2:  If you write different sheet  Same object 
		String fileName = "F:\\temporary\\" + "repeatedWrite" + System.currentTimeMillis() + ".xlsx";
		//  here   Specified file 
		try {
    
			excelWriter = EasyExcel.write(fileName, EmployeeSalaryPojo.class).build();
			// Set dynamic title 
			Map<String, List<List<String>>> head = head();
			int i = 0;
			for (String key : head.keySet()) {
    
				i++;
				/** * 1、 Get value;  Acquired List<List<String>> It means the same sheet The data of  */
				List<List<String>> lists = head.get(key);
				//  Create... Every time writeSheet  Note here that you must specify sheetNo  and sheetName It has to be different 【 We have to add .needHead(Boolean.FALSE), Otherwise, there will be many titles and no data 】
				WriteSheet writeSheet = EasyExcel.writerSheet(i, " Templates " + i).needHead(Boolean.FALSE).build();
				// Dynamic title 
				writeSheet.setHead(lists);
				// Write to excel Space a few lines with the top 
				writeSheet.setRelativeHeadRowIndex(1);

				/** * 2、 The same data is written in the same sheet Inside  *  there j Express 1 individual sheet There will be several form data  */
				for (int j = 0;j<3;j++) {
    
					WriteTable writeTable = EasyExcel.writerTable(j).needHead(Boolean.TRUE).build();
					excelWriter.write(data(), writeSheet, writeTable);
				}
			}
		} finally {
    
			if(excelWriter!=null){
    
				excelWriter.finish();
			}
		}
	}