一、纵向合并单元格
使用@Excel(needMerge = true)标记的属性表示此单元格需要合并。@ExcelCollection表示一对多的集合，下面是合并单元格案例。
实体类
企业类：
package com.ywz.entity;
import cn.afterturn.easypoi.excel.annotation.Excel;
import cn.afterturn.easypoi.excel.annotation.ExcelCollection;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;
import java.util.List;
@Data
@ApiModel(description = "企业")
public class Enterprise {
@Excel(name = "企业ID", needMerge = true)
@ApiModelProperty("企业ID")
private String id;
@Excel(name = "企业名称", needMerge = true)
@ApiModelProperty("企业名称")
private String name;
@Excel(name = "企业地址", needMerge = true)
@ApiModelProperty("企业地址")
private String address;
@ExcelCollection(name = "企业收益")
private List<EnterpriseEarning> enterpriseEarnings;
}
企业收入类：
package com.ywz.entity;
import cn.afterturn.easypoi.excel.annotation.Excel;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.AllArgsConstructor;
import lombok.Data;
import java.math.BigDecimal;
@Data
@ApiModel(description = "企业收益")
@AllArgsConstructor
public class EnterpriseEarning {
@ApiModelProperty("收益ID")
private String id;
@ApiModelProperty("企业ID")
private String enterpriseId;
@Excel(name = "年份")
@ApiModelProperty("年份")
private String year;
@Excel(name = "收益")
@ApiModelProperty("收益")
private BigDecimal earning;
}
导出测试
@PostMapping("/export")
public void exportTest(HttpServletResponse response) {
// 企业A
Enterprise enterprise = new Enterprise();
enterprise.setId("1");
enterprise.setName("企业A");
enterprise.setAddress("北京市朝阳区");
List<EnterpriseEarning> enterpriseEarnings = new ArrayList<>();
enterpriseEarnings.add(new EnterpriseEarning("1", "1", "2023", new BigDecimal(200)));
enterpriseEarnings.add(new EnterpriseEarning("2", "1", "2024", new BigDecimal(300)));
enterprise.setEnterpriseEarnings(enterpriseEarnings);
// 企业B
Enterprise enterprise2 = new Enterprise();
enterprise2.setId("2");
enterprise2.setName("企业B");
enterprise2.setAddress("北京市朝阳区");
List<EnterpriseEarning> enterpriseEarnings2 = new ArrayList<>();
enterpriseEarnings2.add(new EnterpriseEarning("3", "2", "2023", new BigDecimal(222)));
enterpriseEarnings2.add(new EnterpriseEarning("4", "2", "2024", new BigDecimal(333)));
enterprise2.setEnterpriseEarnings(enterpriseEarnings2);
// 导出
List<Enterprise> excelList = new ArrayList<>();
excelList.add(enterprise);
excelList.add(enterprise2);
EasyPoiUtil.exportExcel(excelList, "企业数据", "第一页", Enterprise.class, "企业数据.xlsx", response);
}
导入测试
需要保证对应的实体类存在无参构造器，否则将无法创建对象；并且因为合并单元格的原因需要注意导入标题的行数。
@PostMapping("/import")
public void importTest() {
String filePath = "C:\\Users\\86176\\Desktop\\企业数据.xlsx";
// 注意第三个参数：标题行数，因为合并单元格的原因会导致标题行数变化
List<Enterprise> enterpriseList = EasyPoiUtil.importExcel(filePath, 1, 2, Enterprise.class);
System.out.println(enterpriseList);
}
二、二级表头
实体类
@Excel的groupName属性可以定义一级表头。
package com.ywz.entity;
import cn.afterturn.easypoi.excel.annotation.Excel;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;
import java.math.BigDecimal;
@Data
@ApiModel(description = "学生")
public class Student {
@ApiModelProperty(value = "主键")
private Integer id;
@ApiModelProperty(value = "姓名")
@Excel(name = "学生名字", width = 20)
private String name;
@ApiModelProperty(value = "语文")
@Excel(name = "语文", groupName = "成绩", orderNum = "1", width = 15)
private BigDecimal score1;
@ApiModelProperty(value = "数学")
@Excel(name = "数学", groupName = "成绩", orderNum = "2", width = 15)
private BigDecimal score2;
@ApiModelProperty(value = "英语")
@Excel(name = "英语", groupName = "成绩", orderNum = "3", width = 15)
private BigDecimal score3;
@ApiModelProperty(value = "性别")
@Excel(name = "性别", orderNum = "4", width = 15)
private String sex;
}
导出测试
@PostMapping("/export")
public void exportTest(HttpServletResponse response) {
// 学生1
Student student = new Student();
student.setId(1);
student.setName("张三");
student.setScore1(new BigDecimal(100));
student.setScore2(new BigDecimal(90));
student.setScore3(new BigDecimal(80));
student.setSex("男");
// 学生2
Student student2 = new Student();
student2.setId(2);
student2.setName("李四");
student2.setScore1(new BigDecimal(120));
student2.setScore2(new BigDecimal(92));
student2.setScore3(new BigDecimal(82));
student2.setSex("女");
// 导出
List<Student> studentList = new ArrayList<>();
studentList.add(student);
studentList.add(student2);
// 创建导出参数对象，参数1：标题 参数2：sheet名
ExportParams exportParams = new ExportParams("学生成绩", "学生成绩");
EasyPoiUtil.defaultExport(studentList, Student.class, "学生成绩.xlsx", response, exportParams);
}
三、动态导出
利用@Excel的 isColumnHidden 属性动态设置值，只是在导出时隐藏了该列，实际上也还是全部导出了。要彻底的不导出，官方也给出了解决方案：基于List< ExcelExportEntity> 的导出。
实体类
package com.ywz.entity;
import cn.afterturn.easypoi.excel.annotation.Excel;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;
import java.math.BigDecimal;
@Data
@ApiModel(description = "学生")
public class Student {
@ApiModelProperty(value = "主键")
private Integer id;
@ApiModelProperty(value = "姓名")
private String name;
@ApiModelProperty(value = "语文")
private BigDecimal score1;
@ApiModelProperty(value = "数学")
private BigDecimal score2;
@ApiModelProperty(value = "英语")
private BigDecimal score3;
@ApiModelProperty(value = "性别")
private String sex;
}
导出测试
@PostMapping("/export")
public void exportTest(HttpServletResponse response) {
// 学生1
Student student = new Student();
student.setId(1);
student.setName("张三");
student.setScore1(new BigDecimal(100));
student.setScore2(new BigDecimal(90));
student.setScore3(new BigDecimal(80));
student.setSex("男");
// 学生2
Student student2 = new Student();
student2.setId(2);
student2.setName("李四");
student2.setScore1(new BigDecimal(120));
student2.setScore2(new BigDecimal(92));
student2.setScore3(new BigDecimal(82));
student2.setSex("女");
// 导出
List<Student> studentList = new ArrayList<>();
studentList.add(student);
studentList.add(student2);
// 创建需要导出的列 ExcelExportEntity 参数1：表头 参数2：对应数据源属性
List<ExcelExportEntity> colList = new ArrayList<>();
ExcelExportEntity name = new ExcelExportEntity("姓名", "name");
name.setWidth(20);
colList.add(name);
ExcelExportEntity score1 = new ExcelExportEntity("语文", "score1");
score1.setGroupName("成绩");
score1.setWidth(15);
colList.add(score1);
ExcelExportEntity score2 = new ExcelExportEntity("数学", "score2");
score2.setGroupName("成绩");
score2.setWidth(15);
colList.add(score2);
ExcelExportEntity score3 = new ExcelExportEntity("英语", "score3");
score3.setGroupName("成绩");
score3.setWidth(15);
colList.add(score3);
// 导出参数
ExportParams exportParams = new ExportParams("学生成绩表", "成绩表");
EasyPoiUtil.dynamicExportExcel(studentList, "学生成绩表.xlsx", exportParams, colList, response);
}
