引入jar

 <dependency><groupId>com.alibaba</groupId><artifactId>easyexcel</artifactId><version>3.1.0</version></dependency>

代码

public static void main(String[] args) {//选择存储地址String fileName = "/Users/qweasdzxc/Downloads/text.xlsx";// 创建ExcelWriterBuilder对象ExcelWriter excelWriter = EasyExcelFactory.write(fileName).build();//设置动态表头List<List<String>> head1 =new ArrayList<>();head1.add(Collections.singletonList("姓名"));head1.add(Collections.singletonList("年龄"));head1.add(Collections.singletonList("性别"));//填充数据List<List<Object>> data1 = new ArrayList<>();data1.add(Arrays.asList("张三", 20, "男"));data1.add(Arrays.asList("李四", 25, "女"));//放入sheet1中//automaticMergeHead 控制是否合并相同标题的单元格 false==不合并WriteSheet writeSheet = EasyExcelFactory.writerSheet(0, "学生信息1").head(head1).automaticMergeHead(false).build();excelWriter.write(data1, writeSheet);List<List<String>> head2 =new ArrayList<>();head2.add(Collections.singletonList("学科"));head2.add(Collections.singletonList("分数"));List<List<Object>> data2 = new ArrayList<>();data2.add(Arrays.asList("数学", 90));data2.add(Arrays.asList("英语", 85));//放入sheet2中writeSheet = EasyExcelFactory.writerSheet(1, "学生信息2").head(head2).build();excelWriter.write(data2, writeSheet);//关流excelWriter.finish();}

效果