環境搭建

easyexcel 依賴（必須）
springboot (不是必須)
lombok （不是必須）

 <dependency> <groupId>com.alibaba</groupId> <artifactId>easyexcel</artifactId> <version>1.1.2-beat1</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.2</version> </dependency>

讀取excel文件

小於1000行數據

默認讀取

讀取Sheet1的全部數據

 String filePath = "/home/chenmingjian/Downloads/學生表.xlsx"; List<Object> objects = ExcelUtil.readLessThan1000Row(filePath);

指定讀取

下面是學生表.xlsx中Sheet1，Sheet2的數據
在這里插入圖片描述

獲取Sheet1表頭以下的信息

String filePath = "/home/chenmingjian/Downloads/學生表.xlsx"; //第一個1代表sheet1, 第二個1代表從第幾行開始讀取數據，行號最小值為0 Sheet sheet = new Sheet(1, 1); List<Object> objects = ExcelUtil.readLessThan1000Row(filePath,sheet);

獲取Sheet2的所有信息

 String filePath = "/home/chenmingjian/Downloads/學生表.xlsx"; Sheet sheet = new Sheet(2, 0); List<Object> objects = ExcelUtil.readLessThan1000Row(filePath,sheet);

大於1000行數據

默認讀取

String filePath = "/home/chenmingjian/Downloads/學生表.xlsx"; List<Object> objects = ExcelUtil.readMoreThan1000Row(filePath);

指定讀取

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

導出excle

單個Sheet導出

無模型映射導出

String filePath = "/home/chenmingjian/Downloads/測試.xlsx"; List<List<Object>> 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("表頭1", "表頭2", "表頭3"); ExcelUtil.writeBySimple(filePath,data,head);

結果
在這里插入圖片描述

模型映射導出

1、定義好模型對象

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: 表頭名稱 * index: 列的號, 0表示第一列 */ @ExcelProperty(value = "姓名", index = 0) private String name; @ExcelProperty(value = "年齡",index = 1) private int age; @ExcelProperty(value = "學校",index = 2) private String school; }

2、調用方法

String filePath = "/home/chenmingjian/Downloads/測試.xlsx"; ArrayList<TableHeaderExcelProperty> data = new ArrayList<>(); for(int i = 0; i < 4; i++){ TableHeaderExcelProperty tableHeaderExcelProperty = new TableHeaderExcelProperty(); tableHeaderExcelProperty.setName("cmj" + i); tableHeaderExcelProperty.setAge(22 + i); tableHeaderExcelProperty.setSchool("清華大學" + i); data.add(tableHeaderExcelProperty); } ExcelUtil.writeWithTemplate(filePath,data);

多個Sheet導出

1、定義好模型對象

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: 表頭名稱 * index: 列的號, 0表示第一列 */ @ExcelProperty(value = "姓名", index = 0) private String name; @ExcelProperty(value = "年齡",index = 1) private int age; @ExcelProperty(value = "學校",index = 2) private String school; }

2、調用方法

 ArrayList<ExcelUtil.MultipleSheelPropety> list1 = new ArrayList<>(); for(int j = 1; j < 4; j++){ ArrayList<TableHeaderExcelProperty> list = new ArrayList<>(); for(int i = 0; i < 4; i++){ TableHeaderExcelProperty tableHeaderExcelProperty = new TableHeaderExcelProperty(); tableHeaderExcelProperty.setName("cmj" + i); tableHeaderExcelProperty.setAge(22 + i); tableHeaderExcelProperty.setSchool("清華大學" + 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);

工具類

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"); //設置自適應寬度 initSheet.setAutoWidth(Boolean.TRUE); } /** * 讀取少於1000行數據 * @param filePath 文件絕對路徑 * @return */ public static List<Object> readLessThan1000Row(String filePath){ return readLessThan1000RowBySheet(filePath,null); } /** * 讀小於1000行數據, 帶樣式 * filePath 文件絕對路徑 * initSheet ： * sheetNo: sheet頁碼，默認為1 * headLineMun: 從第幾行開始讀取數據，默認為0, 表示從第一行開始讀取 * clazz: 返回數據List<Object> 中Object的類名 */ public static List<Object> 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徑錯誤, 文件：{}", filePath); }finally { try { if(fileStream != null){ fileStream.close(); } } catch (IOException e) { log.info("excel文件讀取失敗, 失敗原因：{}", e); } } return null; } /** * 讀大於1000行數據 * @param filePath 文件覺得路徑 * @return */ public static List<Object> readMoreThan1000Row(String filePath){ return readMoreThan1000RowBySheet(filePath,null); } /** * 讀大於1000行數據, 帶樣式 * @param filePath 文件覺得路徑 * @return */ public static List<Object> 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徑錯誤, 文件：{}", filePath); }finally { try { if(fileStream != null){ fileStream.close(); } } catch (IOException e) { log.error("excel文件讀取失敗, 失敗原因：{}", e); } } return null; } /** * 生成excle * @param filePath 絕對路徑, 如：/home/chenmingjian/Downloads/aaa.xlsx * @param data 數據源 * @param head 表頭 */ public static void writeBySimple(String filePath, List<List<Object>> data, List<String> head){ writeSimpleBySheet(filePath,data,head,null); } /** * 生成excle * @param filePath 絕對路徑, 如：/home/chenmingjian/Downloads/aaa.xlsx * @param data 數據源 * @param sheet excle頁面樣式 * @param head 表頭 */ public static void writeSimpleBySheet(String filePath, List<List<Object>> data, List<String> head, Sheet sheet){ sheet = (sheet != null) ? sheet : initSheet; if(head != null){ List<List<String>> 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徑錯誤, 文件：{}", filePath); }finally { try { if(writer != null){ writer.finish(); } if(outputStream != null){ outputStream.close(); } } catch (IOException e) { log.error("excel文件導出失敗, 失敗原因：{}", e); } } } /** * 生成excle * @param filePath 絕對路徑, 如：/home/chenmingjian/Downloads/aaa.xlsx * @param data 數據源 */ public static void writeWithTemplate(String filePath, List<? extends BaseRowModel> data){ writeWithTemplateAndSheet(filePath,data,null); } /** * 生成excle * @param filePath 絕對路徑, 如：/home/chenmingjian/Downloads/aaa.xlsx * @param data 數據源 * @param sheet excle頁面樣式 */ 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徑錯誤, 文件：{}", filePath); }finally { try { if(writer != null){ writer.finish(); } if(outputStream != null){ outputStream.close(); } } catch (IOException e) { log.error("excel文件導出失敗, 失敗原因：{}", e); } } } /** * 生成多Sheet的excle * @param filePath 絕對路徑, 如：/home/chenmingjian/Downloads/aaa.xlsx * @param multipleSheelPropetys */ public static void writeWithMultipleSheel(String filePath,List<MultipleSheelPropety> 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徑錯誤, 文件：{}", filePath); }finally { try { if(writer != null){ writer.finish(); } if(outputStream != null){ outputStream.close(); } } catch (IOException e) { log.error("excel文件導出失敗, 失敗原因：{}", e); } } } /*********************匿名內部類開始，可以提取出去******************************/ @Data public static class MultipleSheelPropety{ private List<? extends BaseRowModel> data; private Sheet sheet; } /** * 解析監聽器， * 每解析一行會回調invoke()方法。 * 整個excel解析結束會執行doAfterAllAnalysed()方法 * * @author: chenmingjian * @date: 19-4-3 14:11 */ @Getter @Setter public static class ExcelListener extends AnalysisEventListener { private List<Object> datas = new ArrayList<>(); /** * 逐行解析 * object : 當前行的數據 */ @Override public void invoke(Object object, AnalysisContext context) { //當前行 // context.getCurrentRowNum() if (object != null) { datas.add(object); } } /** * 解析完所有數據后會調用該方法 */ @Override public void doAfterAllAnalysed(AnalysisContext context) { //解析結束銷毀不用的資源 } } /************************匿名內部類結束，可以提取出去***************************/ }

測試類

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: 測試類 * @author: chenmingjian * @date: 19-4-4 15:24 */ @SpringBootTest @RunWith(SpringRunner.class) public class Test { /** * 讀取少於1000行的excle */ @org.junit.Test public void readLessThan1000Row(){ String filePath = "/home/chenmingjian/Downloads/測試.xlsx"; List<Object> objects = ExcelUtil.readLessThan1000Row(filePath); objects.forEach(System.out::println); } /** * 讀取少於1000行的excle，可以指定sheet和從幾行讀起 */ @org.junit.Test public void readLessThan1000RowBySheet(){ String filePath = "/home/chenmingjian/Downloads/測試.xlsx"; Sheet sheet = new Sheet(1, 1); List<Object> objects = ExcelUtil.readLessThan1000RowBySheet(filePath,sheet); objects.forEach(System.out::println); } /** * 讀取大於1000行的excle * 帶sheet參數的方法可參照測試方法readLessThan1000RowBySheet() */ @org.junit.Test public void readMoreThan1000Row(){ String filePath = "/home/chenmingjian/Downloads/測試.xlsx"; List<Object> objects = ExcelUtil.readMoreThan1000Row(filePath); objects.forEach(System.out::println); } /** * 生成excle * 帶sheet參數的方法可參照測試方法readLessThan1000RowBySheet() */ @org.junit.Test public void writeBySimple(){ String filePath = "/home/chenmingjian/Downloads/測試.xlsx"; List<List<Object>> 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("表頭1", "表頭2", "表頭3"); ExcelUtil.writeBySimple(filePath,data,head); } /** * 生成excle, 帶用模型 * 帶sheet參數的方法可參照測試方法readLessThan1000RowBySheet() */ @org.junit.Test public void writeWithTemplate(){ String filePath = "/home/chenmingjian/Downloads/測試.xlsx"; ArrayList<TableHeaderExcelProperty> data = new ArrayList<>(); for(int i = 0; i < 4; i++){ TableHeaderExcelProperty tableHeaderExcelProperty = new TableHeaderExcelProperty(); tableHeaderExcelProperty.setName("cmj" + i); tableHeaderExcelProperty.setAge(22 + i); tableHeaderExcelProperty.setSchool("清華大學" + i); data.add(tableHeaderExcelProperty); } ExcelUtil.writeWithTemplate(filePath,data); } /** * 生成excle, 帶用模型,帶多個sheet */ @org.junit.Test public void writeWithMultipleSheel(){ ArrayList<ExcelUtil.MultipleSheelPropety> list1 = new ArrayList<>(); for(int j = 1; j < 4; j++){ ArrayList<TableHeaderExcelProperty> list = new ArrayList<>(); for(int i = 0; i < 4; i++){ TableHeaderExcelProperty tableHeaderExcelProperty = new TableHeaderExcelProperty(); tableHeaderExcelProperty.setName("cmj" + i); tableHeaderExcelProperty.setAge(22 + i); tableHeaderExcelProperty.setSchool("清華大學" + 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); } /*******************匿名內部類，實際開發中該對象要提取出去**********************/ /** * @description: * @author: chenmingjian * @date: 19-4-3 14:44 */ @EqualsAndHashCode(callSuper = true) @Data public static class TableHeaderExcelProperty extends BaseRowModel { /** * value: 表頭名稱 * index: 列的號, 0表示第一列 */ @ExcelProperty(value = "姓名", index = 0) private String name; @ExcelProperty(value = "年齡",index = 1) private int age; @ExcelProperty(value = "學校",index = 2) private String school; } /*******************匿名內部類，實際開發中該對象要提取出去**********************/ }

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