EasyExcel设置自定义设置单元数据格及样式

EasyExcel设置自定义设置单元数据格

EasyExcel 它是一个简化Excel操作的Java库，可以快速读写大数据Excel。本文将介绍如何使用EasyExcel以及如何定制单元格式。

• EasyExcel安装
• 读取Excel文件
• 写Excel文件
• 定制单元格式样式
• 总结

要使用EasyExcel，您需要将其添加到项目的依赖中。对于Maven项目，请访问pom.xml以下依赖添加到文件中：

<dependency>  <groupId>com.alibaba</groupId>  <artifactId>easyexcel</artifactId>  <version>2.2.7</version></dependency>

请参考Gradle项目build.gradle以下依赖添加到文件中：

implementation 'com.alibaba:easyexcel:2.2.7'

EasyExcel为读取Excel文件提供了简单易用的API。以下是一个简单的例子：

import com.alibaba.excel.EasyExcel;public class ReadExcelExample {    public static void main(String[] args) {        String fileName = "example.xlsx";        EasyExcel.read(fileName, DataModel.class, new DataModelListener()).sheet().doRead();    }}

DataModel用于存储Excel文件中的数据的Java类。DataModelListener这是一种实现ReadListener用于处理读取数据的接口类别。

EasyExcel为Excel文件提供了方便的API。以下是一个简单的例子：

import com.alibaba.excel.EasyExcel;public class WriteExcelExample {    public static void main(String[] args) {        String fileName = "example.xlsx";        List<DataModel> data = getData();        EasyExcel.write(fileName, DataModel.class).sheet().doWrite(data);    }    private static List<DataModel> getData() {        // 实现数据获取    }}

在上述示例中，getData()该方法用于获取要写入Excel文件的数据。

EasyExcel允许自定义单元格式，如字体、背景颜色等。以下是如何定制单元格式的例子：

要定制标题样式，你需要创建一个来实现它HeadStyleStrategy接口类别，如：

import com.alibaba.excel.metadata.Head;import com.alibaba.excel.write.metadata.style.WriteCellStyle;import com.alibaba.excel.write.metadata.style.WriteFont;import com.alibaba.excel.write.style.AbstractCellStyleStrategy;import org.apache.poi.ss.usermodel.BorderStyle;import org.apache.poi.ss.usermodel.HorizontalAlignment;import org.apache.poi.ss.usermodel.IndexedColors;import org.apache.poi.ss.usermodel.VerticalAlignment;public class CustomHeadStyleStrategy extends AbstractCellStyleStrategy {    @Override    protected WriteCellStyle headCellStyle(Head head) {        WriteCellStyle headWriteCellStyle = new WriteCellStyle();        headWriteCellStyle.setFillForegroundColor(IndexedColors.BLUE_GREY.getIndex());        headWriteCellStyle.setHorizontalAlignment(HorizontalAlignment.CENTER);        headWriteCellStyle.setVerticalAlignment(VerticalAlignment.CENTER);        headWriteCellStyle.setWrapped(true);        WriteFont headWriteFont = new WriteFont();        headWriteFont.setFontHeightInPoints((short) 12);        headWriteFont.setFontName(“微软雅黑”;        headWriteFont.setBold(true);        headWriteCellStyle.setWriteFont(headWriteFont);        headWriteCellStyle.setBorderBottom(BorderStyle.THIN);        headWriteCellStyle.setBorderLeft(BorderStyle.THIN);        headWriteCellStyle.setBorderRight(BorderStyle.THIN);        headWriteCellStyle.setBorderTop(BorderStyle.THIN);        return headWriteCellStyle;    }}

然后，当写入Excel时，它将是CustomHeadStyleStrategy应用到ExcelWriter：

EasyExcel.write(fileName, DataModel.class)        .registerWriteHandler(new CustomHeadStyleStrategy())        .sheet()        .doWrite(data);

为了定制内容样式，您需要创建一个实现CellStyleStrategy接口类别，如：

import com.alibaba.excel.metadata.CellData;import com.alibaba.excel.metadata.Head;import com.alibaba.excel.metadata.data.WriteCellData;import com.alibaba.excel.write.metadata.style.WriteCellStyle;import com.alibaba.excel.write.metadata.style.WriteFont;import com.alibaba.excel.write.style.AbstractCellStyleStrategy;import org.apache.poi.ss.usermodel.BorderStyle;import org.apache.poi.ss.usermodel.HorizontalAlignment;import org.apache.poi.ss.usermodel.IndexedColors;import org.apache.poi.ss.usermodel.VerticalAlignment;public class CustomContentStyleStrategy extends AbstractCellStyleStrategy {    @Override    protected WriteCellStyle contentCellStyle(CellData<?> cellData) {        WriteCellStyle contentWriteCellStyle = new WriteCellStyle();        contentWriteCellStyle.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());        contentWriteCellStyle.setHorizontalAlignment(HorizontalAlignment.LEFT);        contentWriteCellStyle.setVerticalAlignment(VerticalAlignment.CENTER);        contentWriteCellStyle.setWrapped(true);        WriteFont contentWriteFont = new WriteFont();        contentWriteFont.setFontHeightInPoints((short) 11);        contentWriteFont.setFontName(宋体);        contentWriteCellStyle.setWriteFont(contentWriteFont);        contentWriteCellStyle.setBorderBottom(BorderStyle.THIN);        contentWriteCellStyle.setBorderLeft(BorderStyle.THIN);        contentWriteCellStyle.setBorderRight(BorderStyle.THIN);        contentWriteCellStyle.setBorderTop(BorderStyle.THIN);        return contentWriteCellStyle;    }}

然后，当写入Excel时，它将是CustomContentStyleStrategy应用到ExcelWriter：

EasyExcel.write(fileName, DataModel.class)        .registerWriteHandler(new CustomContentStyleStrategy())        .sheet()        .doWrite(data);

如果需要同时定制标题和内容样式，可以CustomHeadStyleStrategy和CustomContentStyleStrategy都应用到ExcelWriter：

EasyExcel.write(fileName, DataModel.class)        .registerWriteHandler(new CustomHeadStyleStrategy())        .registerWriteHandler(new CustomContentStyleStrategy())        .sheet()        .doWrite(data);

本文介绍了如何使用EasyExcel读写Excel文件，并详细说明了如何定制单元格式。EasyExcel提供了简单的API和强大的自定义功能，使处理Excel文件更容易。希望本文能为您提供关于EasyExcel使用和自定义单元格式的实用信息。