史上最全的 Excel 导入导出

Java技术迷

共 8018字,需浏览 17分钟

 · 2021-11-09

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喝水不忘挖井人,感谢阿里巴巴项目组提供了easyexcel工具类,github地址:

https://github.com/alibaba/easyexcel

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

环境搭建

  • easyexcel 依赖(必须)

  • springboot (不是必须)

  • lombok (不是必须)
<dependency>
   <groupId>com.alibabagroupId>

   <artifactId>easyexcelartifactId>
   <version>1.1.2-beat1version>
 dependency>
  
 <dependency>
   <groupId>org.projectlombokgroupId>
   <artifactId>lombokartifactId>
   <version>1.18.2version>
 dependency>

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<Object> objects = ExcelUtil.readLessThan1000Row(filePath);

指定读取

下面是学生表.xlsx中Sheet1,Sheet2的数据

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<Object> 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<Object> 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<Object> objects = ExcelUtil.readMoreThan1000Row(filePath);
指定读取
String filePath = "/home/chenmingjian/Downloads/学生表.xlsx";
Sheet sheet = new Sheet(1, 2);
List<Object> 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<List> data = 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

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 = "姓名", index = 0)
    private String name;

    @ExcelProperty(value = "年龄",index = 1)
    private int age;

    @ExcelProperty(value = "学校",index = 2)
    private String school;
}


2、调用方法
String filePath = "/home/chenmingjian/Downloads/测试.xlsx";
ArrayList data = 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 = "姓名", index = 0)
    private String name;

    @ExcelProperty(value = "年龄",index = 1)
    private int age;

    @ExcelProperty(value = "学校",index = 2)
    private String school;
}

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

/**
 * @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<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<List> data, List head, Sheet sheet){
      sheet = (sheet != null) ? sheet : initSheet;

      if(head != null){
         List<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 extends BaseRowModel> 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 extends BaseRowModel> 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 extends BaseRowModel> 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

/**
 * @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<Object> 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<Object> 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<Object> 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";
        ListObject
>> data = new ArrayList<>();
        data.add(Arrays.asList("111","222","333"));
        data.add(Arrays.asList("111","222","333"));
        data.add(Arrays.asList("111","222","333"));
        List<String> 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 = 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 = "姓名", index = 0)
        private String name;

        @ExcelProperty(value = "年龄",index = 1)
        private int age;

        @ExcelProperty(value = "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**********************/

}

来源:blog.csdn.net/qq_32258777/article/details/89031479


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