easyexcel读和写excel

请直接看原文:

JAVA使用easyexcel操作Excel-CSDN博客

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之前写过一篇《JAVA操作Excel》，介绍了jxl和poi读写Excel的实现，今天为大家介绍一下使用easyexcel对Excel进行读写，项目主页地址：GitHub - alibaba/easyexcel: 快速、简洁、解决大文件内存溢出的java处理Excel工具

作者对easyexcel的介绍是：

Java解析、生成Excel比较有名的框架有Apache poi、jxl。但他们都存在一个严重的问题就是非常的耗内存，poi有一套SAX模式的API可以一定程度的解决一些内存溢出的问题，但POI还是有一些缺陷，比如07版Excel解压缩以及解压后存储都是在内存中完成的，内存消耗依然很大。easyexcel重写了poi对07版Excel的解析，能够原本一个3M的excel用POI sax依然需要100M左右内存降低到KB级别，并且再大的excel不会出现内存溢出，03版依赖POI的sax模式。在上层做了模型转换的封装，让使用者更加简单方便

使用easyexcel，首先我们需要添加maven依赖：

<dependency><groupId>com.alibaba</groupId><artifactId>easyexcel</artifactId><version>1.0.1</version>
</dependency>

一.写入excle无表头

首先，我们先来看看如何写Excel，写入Excel，我们可以通过com.alibaba.excel.ExcelWriter类实现，下面我们来看一下最简单的无表头的实现

package test;import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;import org.junit.Test;import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.metadata.Sheet;
import com.alibaba.excel.support.ExcelTypeEnum;public class ExcelWriteTest {/*** 每行数据是List<String>无表头* * @throws IOException*/@Testpublic void writeWithoutHead() throws IOException {try (OutputStream out = new FileOutputStream("withoutHead.xlsx");) {ExcelWriter writer = new ExcelWriter(out, ExcelTypeEnum.XLSX, false);Sheet sheet1 = new Sheet(1, 0);sheet1.setSheetName("sheet1");List<List<String>> data = new ArrayList<>();for (int i = 0; i < 100; i++) {List<String> item = new ArrayList<>();item.add("item0" + i);item.add("item1" + i);item.add("item2" + i);data.add(item);}writer.write0(data, sheet1);writer.finish();}}
}

生成的Excel样式如下：
这里写图片描述

二.写入excle有表头

很多时候，我们在生成Excel的时候都是需要添加表头的，使用easyexcel可以很容易的实现，我们可以对上面的例子进行简单的改造，为其添加表头

package test;import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;import org.junit.Test;import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.metadata.Sheet;
import com.alibaba.excel.metadata.Table;
import com.alibaba.excel.support.ExcelTypeEnum;public class ExcelWriteTest {@Testpublic void writeWithoutHead() throws IOException {try (OutputStream out = new FileOutputStream("withHead.xlsx");) {ExcelWriter writer = new ExcelWriter(out, ExcelTypeEnum.XLSX);Sheet sheet1 = new Sheet(1, 0);sheet1.setSheetName("sheet1");List<List<String>> data = new ArrayList<>();for (int i = 0; i < 100; i++) {List<String> item = new ArrayList<>();item.add("item0" + i);item.add("item1" + i);item.add("item2" + i);data.add(item);}List<List<String>> head = new ArrayList<List<String>>();List<String> headCoulumn1 = new ArrayList<String>();List<String> headCoulumn2 = new ArrayList<String>();List<String> headCoulumn3 = new ArrayList<String>();headCoulumn1.add("第一列");headCoulumn2.add("第二列");headCoulumn3.add("第三列");head.add(headCoulumn1);head.add(headCoulumn2);head.add(headCoulumn3);Table table = new Table(1);table.setHead(head);writer.write0(data, sheet1, table);writer.finish();}}
}

效果如下：

这里写图片描述

三.实体类写入excle有表头 

除了上面添加表头的方式，我们还可以使用实体类，为其添加com.alibaba.excel.annotation.ExcelProperty注解来生成表头，实体类数据作为Excel数据

package test;import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;import org.junit.Test;import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.metadata.BaseRowModel;
import com.alibaba.excel.metadata.Sheet;
import com.alibaba.excel.metadata.Table;
import com.alibaba.excel.support.ExcelTypeEnum;public class ExcelWriteTest {@Testpublic void writeWithHead() throws IOException {try (OutputStream out = new FileOutputStream("withHead.xlsx");) {ExcelWriter writer = new ExcelWriter(out, ExcelTypeEnum.XLSX);Sheet sheet1 = new Sheet(1, 0, ExcelPropertyIndexModel.class);sheet1.setSheetName("sheet1");List<ExcelPropertyIndexModel> data = new ArrayList<>();for (int i = 0; i < 100; i++) {ExcelPropertyIndexModel item = new ExcelPropertyIndexModel();item.name = "name" + i;item.age = "age" + i;item.email = "email" + i;item.address = "address" + i;item.sax = "sax" + i;item.heigh = "heigh" + i;item.last = "last" + i;data.add(item);}writer.write(data, sheet1);writer.finish();}}public static class ExcelPropertyIndexModel extends BaseRowModel {@ExcelProperty(value = "姓名", index = 0)private String name;@ExcelProperty(value = "年龄", index = 1)private String age;@ExcelProperty(value = "邮箱", index = 2)private String email;@ExcelProperty(value = "地址", index = 3)private String address;@ExcelProperty(value = "性别", index = 4)private String sax;@ExcelProperty(value = "高度", index = 5)private String heigh;@ExcelProperty(value = "备注", index = 6)private String last;}
}

效果如下：
这里写图片描述

四.实体类写入excle有多行表头

如果单行表头表头还不满足需求，没关系，还可以使用多行复杂的表头

package test;import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;import org.junit.Test;import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.metadata.BaseRowModel;
import com.alibaba.excel.metadata.Sheet;
import com.alibaba.excel.metadata.Table;
import com.alibaba.excel.support.ExcelTypeEnum;public class ExcelWriteTest {@Testpublic void writeWithMultiHead() throws IOException {try (OutputStream out = new FileOutputStream("withMultiHead.xlsx");) {ExcelWriter writer = new ExcelWriter(out, ExcelTypeEnum.XLSX);Sheet sheet1 = new Sheet(1, 0, MultiLineHeadExcelModel.class);sheet1.setSheetName("sheet1");List<MultiLineHeadExcelModel> data = new ArrayList<>();for (int i = 0; i < 100; i++) {MultiLineHeadExcelModel item = new MultiLineHeadExcelModel();item.p1 = "p1" + i;item.p2 = "p2" + i;item.p3 = "p3" + i;item.p4 = "p4" + i;item.p5 = "p5" + i;item.p6 = "p6" + i;item.p7 = "p7" + i;item.p8 = "p8" + i;item.p9 = "p9" + i;data.add(item);}writer.write(data, sheet1);writer.finish();}}public static class MultiLineHeadExcelModel extends BaseRowModel {@ExcelProperty(value = { "表头1", "表头1", "表头31" }, index = 0)private String p1;@ExcelProperty(value = { "表头1", "表头1", "表头32" }, index = 1)private String p2;@ExcelProperty(value = { "表头3", "表头3", "表头3" }, index = 2)private String p3;@ExcelProperty(value = { "表头4", "表头4", "表头4" }, index = 3)private String p4;@ExcelProperty(value = { "表头5", "表头51", "表头52" }, index = 4)private String p5;@ExcelProperty(value = { "表头6", "表头61", "表头611" }, index = 5)private String p6;@ExcelProperty(value = { "表头6", "表头61", "表头612" }, index = 6)private String p7;@ExcelProperty(value = { "表头6", "表头62", "表头621" }, index = 7)private String p8;@ExcelProperty(value = { "表头6", "表头62", "表头622" }, index = 8)private String p9;}
}

效果如下：
这里写图片描述

五.写入excle一个sheet有多个表

怎么样，这些已经基本满足我们的日常需求了，easyexcel不仅支持上述几种形式，还支持在一个sheet中添加多个表

package test;import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;import org.junit.Test;import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.metadata.BaseRowModel;
import com.alibaba.excel.metadata.Sheet;
import com.alibaba.excel.metadata.Table;
import com.alibaba.excel.support.ExcelTypeEnum;public class ExcelWriteTest {@Testpublic void writeWithMultiTable() throws IOException {try (OutputStream out = new FileOutputStream("withMultiTable.xlsx");) {ExcelWriter writer = new ExcelWriter(out, ExcelTypeEnum.XLSX);Sheet sheet1 = new Sheet(1, 0);sheet1.setSheetName("sheet1");// 数据全是List<String> 无模型映射关系Table table1 = new Table(1);List<List<String>> data1 = new ArrayList<>();for (int i = 0; i < 5; i++) {List<String> item = new ArrayList<>();item.add("item0" + i);item.add("item1" + i);item.add("item2" + i);data1.add(item);}writer.write0(data1, sheet1, table1);// 模型上有表头的注解Table table2 = new Table(2);table2.setClazz(MultiLineHeadExcelModel.class);List<MultiLineHeadExcelModel> data2 = new ArrayList<>();for (int i = 0; i < 5; i++) {MultiLineHeadExcelModel item = new MultiLineHeadExcelModel();item.p1 = "p1" + i;item.p2 = "p2" + i;item.p3 = "p3" + i;item.p4 = "p4" + i;item.p5 = "p5" + i;item.p6 = "p6" + i;item.p7 = "p7" + i;item.p8 = "p8" + i;item.p9 = "p9" + i;data2.add(item);}writer.write(data2, sheet1, table2);// 模型上没有注解，表头数据动态传入,此情况下模型field顺序与excel现实顺序一致List<List<String>> head = new ArrayList<List<String>>();List<String> headCoulumn1 = new ArrayList<String>();List<String> headCoulumn2 = new ArrayList<String>();List<String> headCoulumn3 = new ArrayList<String>();headCoulumn1.add("第一列");headCoulumn2.add("第二列");headCoulumn3.add("第三列");head.add(headCoulumn1);head.add(headCoulumn2);head.add(headCoulumn3);Table table3 = new Table(3);table3.setHead(head);writer.write0(data1, sheet1, table3);writer.finish();}}public static class MultiLineHeadExcelModel extends BaseRowModel {@ExcelProperty(value = { "表头1", "表头1", "表头31" }, index = 0)private String p1;@ExcelProperty(value = { "表头1", "表头1", "表头32" }, index = 1)private String p2;@ExcelProperty(value = { "表头3", "表头3", "表头3" }, index = 2)private String p3;@ExcelProperty(value = { "表头4", "表头4", "表头4" }, index = 3)private String p4;@ExcelProperty(value = { "表头5", "表头51", "表头52" }, index = 4)private String p5;@ExcelProperty(value = { "表头6", "表头61", "表头611" }, index = 5)private String p6;@ExcelProperty(value = { "表头6", "表头61", "表头612" }, index = 6)private String p7;@ExcelProperty(value = { "表头6", "表头62", "表头621" }, index = 7)private String p8;@ExcelProperty(value = { "表头6", "表头62", "表头622" }, index = 8)private String p9;}
}

效果如下：
这里写图片描述

如果表头的样式不满足我们的需求，需要调整，我们可以使用com.alibaba.excel.metadata.TableStyle定义我们需要的样式，然后调用table对象的setTableStyle方法进行设置。

六.读取excel内容(不建议用下面的方法,自己百度一下easyexcel读的简单示例方法就够用了)

好了，到这里写入excel就基本介绍完了，下面我们就来看看如何读取excel，实际上现在的这个版本(1.0.1)在读取的时候是有BUG的，读取03版的.xls格式的excel正常，但是读取07版的.xlsx版的excel就会出异常，原因是在解析的时候sheet临时文件路径拼装有误，下面是我针对这个版本修复后的实现，大家可以替换掉原包中的实现

package com.alibaba.excel.read;import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.LinkedList;
import java.util.List;
import java.util.Locale;import javax.xml.parsers.ParserConfigurationException;import com.alibaba.excel.read.v07.RowHandler;
import com.alibaba.excel.read.v07.XmlParserFactory;
import com.alibaba.excel.read.v07.XMLTempFile;
import com.alibaba.excel.read.context.AnalysisContext;
import com.alibaba.excel.read.exception.ExcelAnalysisException;
import com.alibaba.excel.metadata.Sheet;
import com.alibaba.excel.util.FileUtil;import org.apache.poi.xssf.model.SharedStringsTable;
import org.apache.xmlbeans.XmlException;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTWorkbook;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTWorkbookPr;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.WorkbookDocument;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;public class SaxAnalyserV07 extends BaseSaxAnalyser {private SharedStringsTable sharedStringsTable;private List<String> sharedStringList = new LinkedList<String>();private List<SheetSource> sheetSourceList = new ArrayList<SheetSource>();private boolean use1904WindowDate = false;private final String path;private File tmpFile;private String workBookXMLFilePath;private String sharedStringXMLFilePath;public SaxAnalyserV07(AnalysisContext analysisContext) throws Exception {this.analysisContext = analysisContext;this.path = XMLTempFile.createPath();this.tmpFile = new File(XMLTempFile.getTmpFilePath(path));this.workBookXMLFilePath = XMLTempFile.getWorkBookFilePath(path);this.sharedStringXMLFilePath = XMLTempFile.getSharedStringFilePath(path);start();}@Overrideprotected void execute() {try {Sheet sheet = analysisContext.getCurrentSheet();if (!isAnalysisAllSheets(sheet)) {if (this.sheetSourceList.size() < sheet.getSheetNo() || sheet.getSheetNo() == 0) {return;}InputStream sheetInputStream = this.sheetSourceList.get(sheet.getSheetNo() - 1).getInputStream();parseXmlSource(sheetInputStream);return;}int i = 0;for (SheetSource sheetSource : this.sheetSourceList) {i++;this.analysisContext.setCurrentSheet(new Sheet(i));parseXmlSource(sheetSource.getInputStream());}} catch (Exception e) {stop();throw new ExcelAnalysisException(e);} finally {}}private boolean isAnalysisAllSheets(Sheet sheet) {if (sheet == null) {return true;}if (sheet.getSheetNo() < 0) {return true;}return false;}public void stop() {FileUtil.deletefile(path);}private void parseXmlSource(InputStream inputStream) {try {ContentHandler handler = new RowHandler(this, this.sharedStringsTable, this.analysisContext,sharedStringList);XmlParserFactory.parse(inputStream, handler);inputStream.close();} catch (Exception e) {try {inputStream.close();} catch (IOException e1) {e1.printStackTrace();}throw new ExcelAnalysisException(e);}}public List<Sheet> getSheets() {List<Sheet> sheets = new ArrayList<Sheet>();try {int i = 1;for (SheetSource sheetSource : this.sheetSourceList) {Sheet sheet = new Sheet(i, 0);sheet.setSheetName(sheetSource.getSheetName());i++;sheets.add(sheet);}} catch (Exception e) {stop();throw new ExcelAnalysisException(e);} finally {}return sheets;}private void start() throws IOException, XmlException, ParserConfigurationException, SAXException {createTmpFile();unZipTempFile();initSharedStringsTable();initUse1904WindowDate();initSheetSourceList();}private void createTmpFile() throws FileNotFoundException {FileUtil.writeFile(tmpFile, analysisContext.getInputStream());}private void unZipTempFile() throws IOException {FileUtil.doUnZip(path, tmpFile);}private void initSheetSourceList() throws IOException, ParserConfigurationException, SAXException {this.sheetSourceList = new ArrayList<SheetSource>();InputStream workbookXml = new FileInputStream(this.workBookXMLFilePath);XmlParserFactory.parse(workbookXml, new DefaultHandler() {@Overridepublic void startElement(String uri, String localName, String qName, Attributes attrs) throws SAXException {if (qName.toLowerCase(Locale.US).equals("sheet")) {String name = null;int id = 0;for (int i = 0; i < attrs.getLength(); i++) {if (attrs.getLocalName(i).toLowerCase(Locale.US).equals("name")) {name = attrs.getValue(i);}/** else if (attrs.getLocalName(i).toLowerCase(Locale.US).equals("r:id")) {id = Integer.parseInt(attrs.getValue(i).replaceAll("rId", ""));try {InputStream inputStream = new FileInputStream(XMLTempFile.getSheetFilePath(path, id));sheetSourceList.add(new SheetSource(id, name, inputStream));} catch (FileNotFoundException e) {e.printStackTrace();}} **///应该使用sheetId属性else if (attrs.getLocalName(i).toLowerCase(Locale.US).equals("sheetid")) {id = Integer.parseInt(attrs.getValue(i));try {InputStream inputStream = new FileInputStream(XMLTempFile.getSheetFilePath(path, id));sheetSourceList.add(new SheetSource(id, name, inputStream));} catch (FileNotFoundException e) {e.printStackTrace();}}}}}});workbookXml.close();// 排序后是倒序，不符合实际要求// Collections.sort(sheetSourceList);Collections.sort(sheetSourceList, new Comparator<SheetSource>() {@Overridepublic int compare(SheetSource o1, SheetSource o2) {return o1.id - o2.id;}});}private void initUse1904WindowDate() throws IOException, XmlException {InputStream workbookXml = new FileInputStream(workBookXMLFilePath);WorkbookDocument ctWorkbook = WorkbookDocument.Factory.parse(workbookXml);CTWorkbook wb = ctWorkbook.getWorkbook();CTWorkbookPr prefix = wb.getWorkbookPr();if (prefix != null) {this.use1904WindowDate = prefix.getDate1904();}this.analysisContext.setUse1904WindowDate(use1904WindowDate);workbookXml.close();}private void initSharedStringsTable() throws IOException, ParserConfigurationException, SAXException {//因为sharedStrings.xml文件不一定存在，所以在处理之前增加判断File sharedStringXMLFile = new File(this.sharedStringXMLFilePath);if (!sharedStringXMLFile.exists()) {return;}InputStream inputStream = new FileInputStream(this.sharedStringXMLFilePath);//this.sharedStringsTable = new SharedStringsTable();//this.sharedStringsTable.readFrom(inputStream);XmlParserFactory.parse(inputStream, new DefaultHandler() {@Overridepublic void characters(char[] ch, int start, int length) {sharedStringList.add(new String(ch, start, length));}});inputStream.close();}private class SheetSource implements Comparable<SheetSource> {private int id;private String sheetName;private InputStream inputStream;public SheetSource(int id, String sheetName, InputStream inputStream) {this.id = id;this.sheetName = sheetName;this.inputStream = inputStream;}public String getSheetName() {return sheetName;}public void setSheetName(String sheetName) {this.sheetName = sheetName;}public InputStream getInputStream() {return inputStream;}public void setInputStream(InputStream inputStream) {this.inputStream = inputStream;}public int getId() {return id;}public void setId(int id) {this.id = id;}public int compareTo(SheetSource o) {if (o.id == this.id) {return 0;} else if (o.id > this.id) {return 1;} else {return -1;}}}}

另外，使用easyexcel读取excel的时候需要设置excel的版本，但是有些时候我们无法预知excel的版本，所以个人感觉这样不是太好，所以模仿poi写了一个用于获取com.alibaba.excel.ExcelReader对象的工具类

package com.alibaba.excel.read;import java.io.IOException;
import java.io.InputStream;
import java.io.PushbackInputStream;import org.apache.poi.EmptyFileException;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.poifs.filesystem.DocumentFactoryHelper;
import org.apache.poi.poifs.filesystem.NPOIFSFileSystem;
import org.apache.poi.util.IOUtils;import com.alibaba.excel.ExcelReader;
import com.alibaba.excel.read.context.AnalysisContext;
import com.alibaba.excel.read.event.AnalysisEventListener;
import com.alibaba.excel.support.ExcelTypeEnum;public class ExcelReaderFactory {/*** @param in*           文件输入流* @param customContent*           自定义模型可以在*           {@link AnalysisEventListener#invoke(Object, AnalysisContext) }*           AnalysisContext中获取用于监听者回调使用* @param eventListener*           用户监听* @throws IOException* @throws EmptyFileException* @throws InvalidFormatException*/public static ExcelReader getExcelReader(InputStream in, Object customContent,AnalysisEventListener<?> eventListener) throws EmptyFileException, IOException, InvalidFormatException {// 如果输入流不支持mark/reset，需要对其进行包裹if (!in.markSupported()) {in = new PushbackInputStream(in, 8);}// 确保至少有一些数据byte[] header8 = IOUtils.peekFirst8Bytes(in);ExcelTypeEnum excelTypeEnum = null;if (NPOIFSFileSystem.hasPOIFSHeader(header8)) {excelTypeEnum = ExcelTypeEnum.XLS;}if (DocumentFactoryHelper.hasOOXMLHeader(in)) {excelTypeEnum = ExcelTypeEnum.XLSX;}if (excelTypeEnum != null) {return new ExcelReader(in, excelTypeEnum, customContent, eventListener);}throw new InvalidFormatException("Your InputStream was neither an OLE2 stream, nor an OOXML stream");}/*** @param in*           文件输入流* @param customContent*           自定义模型可以在*           {@link AnalysisEventListener#invoke(Object, AnalysisContext) }*           AnalysisContext中获取用于监听者回调使用* @param eventListener*           用户监听* @param trim*           是否对解析的String做trim()默认true,用于防止 excel中空格引起的装换报错。* @throws IOException* @throws EmptyFileException* @throws InvalidFormatException*/public static ExcelReader getExcelReader(InputStream in, Object customContent,AnalysisEventListener<?> eventListener, boolean trim)throws EmptyFileException, IOException, InvalidFormatException {// 如果输入流不支持mark/reset，需要对其进行包裹if (!in.markSupported()) {in = new PushbackInputStream(in, 8);}// 确保至少有一些数据byte[] header8 = IOUtils.peekFirst8Bytes(in);ExcelTypeEnum excelTypeEnum = null;if (NPOIFSFileSystem.hasPOIFSHeader(header8)) {excelTypeEnum = ExcelTypeEnum.XLS;}if (DocumentFactoryHelper.hasOOXMLHeader(in)) {excelTypeEnum = ExcelTypeEnum.XLSX;}if (excelTypeEnum != null) {return new ExcelReader(in, excelTypeEnum, customContent, eventListener, trim);}throw new InvalidFormatException("Your InputStream was neither an OLE2 stream, nor an OOXML stream");}
}

下面我们就来写一个简单的读取Excel的示例：

package test;import java.io.FileInputStream;
import java.io.InputStream;
import java.util.List;import org.junit.Test;import com.alibaba.excel.ExcelReader;
import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.metadata.BaseRowModel;
import com.alibaba.excel.metadata.Sheet;
import com.alibaba.excel.read.ExcelReaderFactory;
import com.alibaba.excel.read.context.AnalysisContext;
import com.alibaba.excel.read.event.AnalysisEventListener;public class ExcelReadTest {@Testpublic void read() throws Exception {try (InputStream in = new FileInputStream("withoutHead.xlsx");) {AnalysisEventListener<List<String>> listener = new AnalysisEventListener<List<String>>() {@Overridepublic void invoke(List<String> object, AnalysisContext context) {System.err.println("Row:" + context.getCurrentRowNum() + " Data:" + object);}@Overridepublic void doAfterAllAnalysed(AnalysisContext context) {System.err.println("doAfterAllAnalysed...");}};ExcelReader excelReader = ExcelReaderFactory.getExcelReader(in, null, listener);excelReader.read();}}
}

正如写入Excel的时候可以使用数据模型一样，在读取Excel的时候也可以直接将数据映射为模型对象，区别在于要使用ExcelReader #read的重载方法。

package test;import java.io.FileInputStream;
import java.io.InputStream;
import java.util.List;import org.junit.Test;import com.alibaba.excel.ExcelReader;
import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.metadata.BaseRowModel;
import com.alibaba.excel.metadata.Sheet;
import com.alibaba.excel.read.ExcelReaderFactory;
import com.alibaba.excel.read.context.AnalysisContext;
import com.alibaba.excel.read.event.AnalysisEventListener;public class ExcelReadTest {@Testpublic void read() throws Exception {try (InputStream in = new FileInputStream("withHead.xlsx");) {AnalysisEventListener<ExcelPropertyIndexModel> listener = new AnalysisEventListener<ExcelPropertyIndexModel>() {@Overridepublic void invoke(ExcelPropertyIndexModel object, AnalysisContext context) {System.err.println("Row:" + context.getCurrentRowNum() + " Data:" + object);}@Overridepublic void doAfterAllAnalysed(AnalysisContext context) {System.err.println("doAfterAllAnalysed...");}};ExcelReader excelReader = ExcelReaderFactory.getExcelReader(in, null, listener);// 第二个参数为表头行数，按照实际设置excelReader.read(new Sheet(1, 1, ExcelPropertyIndexModel.class));}}public static class ExcelPropertyIndexModel extends BaseRowModel {@ExcelProperty(value = "姓名", index = 0)private String name;@ExcelProperty(value = "年龄", index = 1)private String age;@ExcelProperty(value = "邮箱", index = 2)private String email;@ExcelProperty(value = "地址", index = 3)private String address;@ExcelProperty(value = "性别", index = 4)private String sax;@ExcelProperty(value = "高度", index = 5)private String heigh;@ExcelProperty(value = "备注", index = 6)private String last;}
}

以上就是关于easyexcel的使用方法介绍，如有疑问，欢迎交流指正。

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