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史上最全的Excel导入导出(easyexcel版)


史上最全的Excel导入导出(easyexcel版)
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文章目录

  • 环境搭建
  • 读取excel文件
  • 默认读取
  • 指定读取
  • 默认读取
  • 指定读取
  • 小于1000行数据
  • 大于1000行数据
  • 导出excle
  • 无模型映射导出
  • 模型映射导出
  • 单个Sheet导出
  • 多个Sheet导出
  • 工具类
  • 测试类
**注 意** **文末有:7701页互联网大厂面试题**

环境搭建
  • easyexcel 依赖(必须)
  • springboot (不是必须)
  • lombok (不是必须)
com.alibaba easyexcel 1.1.2-beat1 org.projectlombok lombok 1.18.2

读取excel文件 小于1000行数据
默认读取 读取Sheet1的全部数据
String filePath = "/home/chenmingjian/Downloads/学生表.xlsx"; List objects = ExcelUtil.readLessThan1000Row(filePath);
指定读取 下面是学生表.xlsx中Sheet1,Sheet2的数据

史上最全的Excel导入导出(easyexcel版)
文章图片

史上最全的Excel导入导出(easyexcel版)
文章图片
获取Sheet1表头以下的信息
String filePath = "/home/chenmingjian/Downloads/学生表.xlsx"; //第一个1代表sheet1, 第二个1代表从第几行开始读取数据,行号最小值为0 Sheet sheet = new Sheet(1, 1); List objects = ExcelUtil.readLessThan1000Row(filePath,sheet);
获取Sheet2的所有信息
String filePath = "/home/chenmingjian/Downloads/学生表.xlsx"; Sheet sheet = new Sheet(2, 0); List objects = ExcelUtil.readLessThan1000Row(filePath,sheet);
大于1000行数据
默认读取
String filePath = "/home/chenmingjian/Downloads/学生表.xlsx"; List objects = ExcelUtil.readMoreThan1000Row(filePath);
指定读取
String filePath = "/home/chenmingjian/Downloads/学生表.xlsx"; Sheet sheet = new Sheet(1, 2); List objects = ExcelUtil.readMoreThan1000Row(filePath,sheet);
导出excle 单个Sheet导出
无模型映射导出
String filePath = "/home/chenmingjian/Downloads/测试.xlsx"; List> data = https://www.it610.com/article/new ArrayList<>(); data.add(Arrays.asList("111","222","333")); data.add(Arrays.asList("111","222","333")); data.add(Arrays.asList("111","222","333")); List head = Arrays.asList("表头1", "表头2", "表头3"); ExcelUtil.writeBySimple(filePath,data,head);

结果

史上最全的Excel导入导出(easyexcel版)
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模型映射导出 1、定义好模型对象
package com.springboot.utils.excel.test; import com.alibaba.excel.annotation.ExcelProperty; import com.alibaba.excel.metadata.BaseRowModel; import lombok.Data; import lombok.EqualsAndHashCode; /** * @description: * @author: chenmingjian * @date: 19-4-3 14:44 */ @EqualsAndHashCode(callSuper = true) @Data public class TableHeaderExcelProperty extends BaseRowModel {/** * value: 表头名称 * index: 列的号, 0表示第一列 */ @ExcelProperty(value = "https://www.it610.com/article/姓名", index = 0) private String name; @ExcelProperty(value = "https://www.it610.com/article/年龄",index = 1) private int age; @ExcelProperty(value = "https://www.it610.com/article/学校",index = 2) private String school; }

2、调用方法
String filePath = "/home/chenmingjian/Downloads/测试.xlsx"; ArrayList data = https://www.it610.com/article/new ArrayList<>(); for(int i = 0; i < 4; i++){ TableHeaderExcelProperty tableHeaderExcelProperty = new TableHeaderExcelProperty(); tableHeaderExcelProperty.setName("cmj" + i); tableHeaderExcelProperty.setAge(22 + i); tableHeaderExcelProperty.setSchool("清华大学" + i); data.add(tableHeaderExcelProperty); }ExcelUtil.writeWithTemplate(filePath,data);

多个Sheet导出
1、定义好模型对象
package com.springboot.utils.excel.test; import com.alibaba.excel.annotation.ExcelProperty; import com.alibaba.excel.metadata.BaseRowModel; import lombok.Data; import lombok.EqualsAndHashCode; /** * @description: * @author: chenmingjian * @date: 19-4-3 14:44 */ @EqualsAndHashCode(callSuper = true) @Data public class TableHeaderExcelProperty extends BaseRowModel {/** * value: 表头名称 * index: 列的号, 0表示第一列 */ @ExcelProperty(value = "https://www.it610.com/article/姓名", index = 0) private String name; @ExcelProperty(value = "https://www.it610.com/article/年龄",index = 1) private int age; @ExcelProperty(value = "https://www.it610.com/article/学校",index = 2) private String school; }

【史上最全的Excel导入导出(easyexcel版)】2、调用方法
ArrayList list1 = new ArrayList<>(); for(int j = 1; j < 4; j++){ ArrayList list = new ArrayList<>(); for(int i = 0; i < 4; i++){ TableHeaderExcelProperty tableHeaderExcelProperty = new TableHeaderExcelProperty(); tableHeaderExcelProperty.setName("cmj" + i); tableHeaderExcelProperty.setAge(22 + i); tableHeaderExcelProperty.setSchool("清华大学" + i); list.add(tableHeaderExcelProperty); }Sheet sheet = new Sheet(j, 0); sheet.setSheetName("sheet" + j); ExcelUtil.MultipleSheelPropety multipleSheelPropety = new ExcelUtil.MultipleSheelPropety(); multipleSheelPropety.setData(list); multipleSheelPropety.setSheet(sheet); list1.add(multipleSheelPropety); }ExcelUtil.writeWithMultipleSheel("/home/chenmingjian/Downloads/aaa.xlsx",list1);

工具类
package com.springboot.utils.excel; import com.alibaba.excel.EasyExcelFactory; import com.alibaba.excel.ExcelWriter; import com.alibaba.excel.context.AnalysisContext; import com.alibaba.excel.event.AnalysisEventListener; import com.alibaba.excel.metadata.BaseRowModel; import com.alibaba.excel.metadata.Sheet; import lombok.Data; import lombok.Getter; import lombok.Setter; import lombok.extern.slf4j.Slf4j; import org.springframework.util.CollectionUtils; import org.springframework.util.StringUtils; import java.io.*; import java.util.ArrayList; import java.util.Collections; import java.util.List; /** * @description: * @author: chenmingjian * @date: 19-3-18 16:16 */ @Slf4j public class ExcelUtil {private static Sheet initSheet; static { initSheet = new Sheet(1, 0); initSheet.setSheetName("sheet"); //设置自适应宽度 initSheet.setAutoWidth(Boolean.TRUE); }/** * 读取少于1000行数据 * @param filePath 文件绝对路径 * @return */ public static List readLessThan1000Row(String filePath){ return readLessThan1000RowBySheet(filePath,null); }/** * 读小于1000行数据, 带样式 * filePath 文件绝对路径 * initSheet : *sheetNo: sheet页码,默认为1 *headLineMun: 从第几行开始读取数据,默认为0, 表示从第一行开始读取 *clazz: 返回数据List 中Object的类名 */ public static List readLessThan1000RowBySheet(String filePath, Sheet sheet){ if(!StringUtils.hasText(filePath)){ return null; }sheet = sheet != null ? sheet : initSheet; InputStream fileStream = null; try { fileStream = new FileInputStream(filePath); return EasyExcelFactory.read(fileStream, sheet); } catch (FileNotFoundException e) { log.info("找不到文件或文件路径错误, 文件:{}", filePath); }finally { try { if(fileStream != null){ fileStream.close(); } } catch (IOException e) { log.info("excel文件读取失败, 失败原因:{}", e); } } return null; }/** * 读大于1000行数据 * @param filePath 文件觉得路径 * @return */ public static List readMoreThan1000Row(String filePath){ return readMoreThan1000RowBySheet(filePath,null); }/** * 读大于1000行数据, 带样式 * @param filePath 文件觉得路径 * @return */ public static List readMoreThan1000RowBySheet(String filePath, Sheet sheet){ if(!StringUtils.hasText(filePath)){ return null; }sheet = sheet != null ? sheet : initSheet; InputStream fileStream = null; try { fileStream = new FileInputStream(filePath); ExcelListener excelListener = new ExcelListener(); EasyExcelFactory.readBySax(fileStream, sheet, excelListener); return excelListener.getDatas(); } catch (FileNotFoundException e) { log.error("找不到文件或文件路径错误, 文件:{}", filePath); }finally { try { if(fileStream != null){ fileStream.close(); } } catch (IOException e) { log.error("excel文件读取失败, 失败原因:{}", e); } } return null; }/** * 生成excle * @param filePath绝对路径, 如:/home/chenmingjian/Downloads/aaa.xlsx * @param data 数据源 * @param head 表头 */ public static void writeBySimple(String filePath, List> data, List head){ writeSimpleBySheet(filePath,data,head,null); }/** * 生成excle * @param filePath 绝对路径, 如:/home/chenmingjian/Downloads/aaa.xlsx * @param data 数据源 * @param sheet excle页面样式 * @param head 表头 */ public static void writeSimpleBySheet(String filePath, List> data, List head, Sheet sheet){ sheet = (sheet != null) ? sheet : initSheet; if(head != null){ List list = new ArrayList<>(); head.forEach(h -> list.add(Collections.singletonList(h))); sheet.setHead(list); }OutputStream outputStream = null; ExcelWriter writer = null; try { outputStream = new FileOutputStream(filePath); writer = EasyExcelFactory.getWriter(outputStream); writer.write1(data,sheet); } catch (FileNotFoundException e) { log.error("找不到文件或文件路径错误, 文件:{}", filePath); }finally { try { if(writer != null){ writer.finish(); }if(outputStream != null){ outputStream.close(); }} catch (IOException e) { log.error("excel文件导出失败, 失败原因:{}", e); } }}/** * 生成excle * @param filePath 绝对路径, 如:/home/chenmingjian/Downloads/aaa.xlsx * @param data 数据源 */ public static void writeWithTemplate(String filePath, List data){ writeWithTemplateAndSheet(filePath,data,null); }/** * 生成excle * @param filePath 绝对路径, 如:/home/chenmingjian/Downloads/aaa.xlsx * @param data 数据源 * @param sheet excle页面样式 */ public static void writeWithTemplateAndSheet(String filePath, List data, Sheet sheet){ if(CollectionUtils.isEmpty(data)){ return; }sheet = (sheet != null) ? sheet : initSheet; sheet.setClazz(data.get(0).getClass()); OutputStream outputStream = null; ExcelWriter writer = null; try { outputStream = new FileOutputStream(filePath); writer = EasyExcelFactory.getWriter(outputStream); writer.write(data,sheet); } catch (FileNotFoundException e) { log.error("找不到文件或文件路径错误, 文件:{}", filePath); }finally { try { if(writer != null){ writer.finish(); }if(outputStream != null){ outputStream.close(); } } catch (IOException e) { log.error("excel文件导出失败, 失败原因:{}", e); } }}/** * 生成多Sheet的excle * @param filePath 绝对路径, 如:/home/chenmingjian/Downloads/aaa.xlsx * @param multipleSheelPropetys */ public static void writeWithMultipleSheel(String filePath,List multipleSheelPropetys){ if(CollectionUtils.isEmpty(multipleSheelPropetys)){ return; }OutputStream outputStream = null; ExcelWriter writer = null; try { outputStream = new FileOutputStream(filePath); writer = EasyExcelFactory.getWriter(outputStream); for (MultipleSheelPropety multipleSheelPropety : multipleSheelPropetys) { Sheet sheet = multipleSheelPropety.getSheet() != null ? multipleSheelPropety.getSheet() : initSheet; if(!CollectionUtils.isEmpty(multipleSheelPropety.getData())){ sheet.setClazz(multipleSheelPropety.getData().get(0).getClass()); } writer.write(multipleSheelPropety.getData(), sheet); }} catch (FileNotFoundException e) { log.error("找不到文件或文件路径错误, 文件:{}", filePath); }finally { try { if(writer != null){ writer.finish(); }if(outputStream != null){ outputStream.close(); } } catch (IOException e) { log.error("excel文件导出失败, 失败原因:{}", e); } }}/*********************匿名内部类开始,可以提取出去******************************/@Data public static class MultipleSheelPropety{private List data; private Sheet sheet; }/** * 解析监听器, * 每解析一行会回调invoke()方法。 * 整个excel解析结束会执行doAfterAllAnalysed()方法 * * @author: chenmingjian * @date: 19-4-3 14:11 */ @Getter @Setter public static class ExcelListener extends AnalysisEventListener {private List datas = new ArrayList<>(); /** * 逐行解析 * object : 当前行的数据 */ @Override public void invoke(Object object, AnalysisContext context) { //当前行 // context.getCurrentRowNum() if (object != null) { datas.add(object); } }/** * 解析完所有数据后会调用该方法 */ @Override public void doAfterAllAnalysed(AnalysisContext context) { //解析结束销毁不用的资源 }}/************************匿名内部类结束,可以提取出去***************************/}
测试类
package com.springboot.utils.excel; import com.alibaba.excel.annotation.ExcelProperty; import com.alibaba.excel.metadata.BaseRowModel; import com.alibaba.excel.metadata.Sheet; import lombok.Data; import lombok.EqualsAndHashCode; import org.junit.runner.RunWith; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.test.context.junit4.SpringRunner; import java.util.ArrayList; import java.util.Arrays; import java.util.List; /** * @description: 测试类 * @author: chenmingjian * @date: 19-4-4 15:24 */ @SpringBootTest @RunWith(SpringRunner.class) public class Test {/** * 读取少于1000行的excle */ @org.junit.Test public void readLessThan1000Row(){ String filePath = "/home/chenmingjian/Downloads/测试.xlsx"; List objects = ExcelUtil.readLessThan1000Row(filePath); objects.forEach(System.out::println); }/** * 读取少于1000行的excle,可以指定sheet和从几行读起 */ @org.junit.Test public void readLessThan1000RowBySheet(){ String filePath = "/home/chenmingjian/Downloads/测试.xlsx"; Sheet sheet = new Sheet(1, 1); List objects = ExcelUtil.readLessThan1000RowBySheet(filePath,sheet); objects.forEach(System.out::println); }/** * 读取大于1000行的excle * 带sheet参数的方法可参照测试方法readLessThan1000RowBySheet() */ @org.junit.Test public void readMoreThan1000Row(){ String filePath = "/home/chenmingjian/Downloads/测试.xlsx"; List objects = ExcelUtil.readMoreThan1000Row(filePath); objects.forEach(System.out::println); }/** * 生成excle * 带sheet参数的方法可参照测试方法readLessThan1000RowBySheet() */ @org.junit.Test public void writeBySimple(){ String filePath = "/home/chenmingjian/Downloads/测试.xlsx"; List> data = https://www.it610.com/article/new ArrayList<>(); data.add(Arrays.asList("111","222","333")); data.add(Arrays.asList("111","222","333")); data.add(Arrays.asList("111","222","333")); List head = Arrays.asList("表头1", "表头2", "表头3"); ExcelUtil.writeBySimple(filePath,data,head); }/** * 生成excle, 带用模型 * 带sheet参数的方法可参照测试方法readLessThan1000RowBySheet() */ @org.junit.Test public void writeWithTemplate(){ String filePath = "/home/chenmingjian/Downloads/测试.xlsx"; ArrayList data = https://www.it610.com/article/new ArrayList<>(); for(int i = 0; i < 4; i++){ TableHeaderExcelProperty tableHeaderExcelProperty = new TableHeaderExcelProperty(); tableHeaderExcelProperty.setName("cmj" + i); tableHeaderExcelProperty.setAge(22 + i); tableHeaderExcelProperty.setSchool("清华大学" + i); data.add(tableHeaderExcelProperty); } ExcelUtil.writeWithTemplate(filePath,data); }/** * 生成excle, 带用模型,带多个sheet */ @org.junit.Test public void writeWithMultipleSheel(){ ArrayList list1 = new ArrayList<>(); for(int j = 1; j < 4; j++){ ArrayList list = new ArrayList<>(); for(int i = 0; i < 4; i++){ TableHeaderExcelProperty tableHeaderExcelProperty = new TableHeaderExcelProperty(); tableHeaderExcelProperty.setName("cmj" + i); tableHeaderExcelProperty.setAge(22 + i); tableHeaderExcelProperty.setSchool("清华大学" + i); list.add(tableHeaderExcelProperty); }Sheet sheet = new Sheet(j, 0); sheet.setSheetName("sheet" + j); ExcelUtil.MultipleSheelPropety multipleSheelPropety = new ExcelUtil.MultipleSheelPropety(); multipleSheelPropety.setData(list); multipleSheelPropety.setSheet(sheet); list1.add(multipleSheelPropety); }ExcelUtil.writeWithMultipleSheel("/home/chenmingjian/Downloads/aaa.xlsx",list1); }/*******************匿名内部类,实际开发中该对象要提取出去**********************//** * @description: * @author: chenmingjian * @date: 19-4-3 14:44 */ @EqualsAndHashCode(callSuper = true) @Data public static class TableHeaderExcelProperty extends BaseRowModel {/** * value: 表头名称 * index: 列的号, 0表示第一列 */ @ExcelProperty(value = "https://www.it610.com/article/姓名", index = 0) private String name; @ExcelProperty(value = "https://www.it610.com/article/年龄",index = 1) private int age; @ExcelProperty(value = "https://www.it610.com/article/学校",index = 2) private String school; }/*******************匿名内部类,实际开发中该对象要提取出去**********************/}



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