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EasyExcel 复杂填充

news 2025/8/24 15:11:47

EasyExcel

Excel表格中用{}或者{.} 来表示包裹要填充的变量，如果单元格文本中本来就有{、}左右大括号，需要在括号前面使用斜杠转义\{ 、\}。

代码中被填充数据的实体对象的成员变量名或被填充map集合的key需要和Excel中被{}包裹的变量名称一致。

ExcelWriter的fill()方法 用于填充数据FillConfig fillConfig = FillConfig.builder().forceNewRow(true).build();//表示开启组合填充换行填充

样例

在这里插入图片描述

测试代码

TeacherInfo 对象

@Data
@NoArgsConstructor
@AllArgsConstructor
@Builder //通过自动生成的构建器模式创建对象
public class TeacherInfo {private int age;//年龄private String name;//姓名private String subject;//科目
}

StudentInfo对象

package com.fasterres.demo.blog;import com.alibaba.excel.annotation.format.DateTimeFormat;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;import java.util.Date;@Data
@NoArgsConstructor
@AllArgsConstructor
public class StudentInfo {private String id;//编号private String studentname;//姓名private String sex;//性别@DateTimeFormat("yyyy/MM/dd")private Date birthday;//生日
}

import cn.hutool.core.date.DateUnit;
import cn.hutool.core.date.DateUtil;
import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.write.metadata.WriteSheet;
import com.alibaba.excel.write.metadata.fill.FillConfig;
import com.alibaba.excel.write.metadata.fill.FillWrapper;
import com.fasterres.demo.blog.StudentInfo;
import com.fasterres.demo.blog.TeacherInfo;
import org.springframework.core.io.ClassPathResource;import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;public class ExcelWriteTest {public static void main(String[] args) throws Exception {// 1.写入文件方式String filePath = "D:\\log\\stduent_01.xlsx";InputStream templateFile = new FileInputStream(filePath);String targetFile = "D:\\学生信息统计2.xlsx";ExcelWriter excelWriter =EasyExcel.write(targetFile).withTemplate(templateFile).build();// 2.加载模板，配置在项目工程下的 写入io/* ClassPathResource resource=new ClassPathResource("template/stduent_01.xlsx");InputStream templateInputStream = resource.getInputStream();*///写入io流//ByteArrayOutputStream outputStream=new ByteArrayOutputStream(1024);// 写入excelWriter对象//ExcelWriter excelWriter= EasyExcel.write(outputStream).withTemplate(templateInputStream ).build();WriteSheet sheet = EasyExcel.writerSheet().build();// 当前日期HashMap<String, String> dateMap = new HashMap<String, String>();dateMap.put("date", "2025-02-06");//填充单个字段信息excelWriter.fill(dateMap,sheet);//填充单个对象信息
/*TeacherInfo teacher=TeacherInfo.builder().age(33).name("张竹").build();excelWriter.fill(teacher,sheet);
*///换行填充FillConfig fillConfig = FillConfig.builder().forceNewRow(true).build();//多次填充list,可以用new FillWrapper(）申明别名//填充第一个listList<TeacherInfo> teacherInfoList=new ArrayList();TeacherInfo teacher2=TeacherInfo.builder().age(22).name("张竹").subject("数学").build();TeacherInfo teacher3=TeacherInfo.builder().age(33).name("power").subject("英语").build();teacherInfoList.add(teacher2);teacherInfoList.add(teacher3);excelWriter.fill(new FillWrapper("t1",teacherInfoList),fillConfig ,sheet);//填充第二个list对象List<StudentInfo> studentInfo = new ArrayList<>();StudentInfo Student1=new  StudentInfo("1", "张三", "男", DateUtil.parse("2022/12/12"));StudentInfo Student2=new  StudentInfo("2", "王芳", "女",  DateUtil.parse("2025/02/15"));studentInfo.add(Student1);studentInfo.add(Student2);excelWriter.fill(new FillWrapper("t2",studentInfo),fillConfig ,sheet);//结束填充excelWriter.finish();}
}