将二维数组导出为 excel

为了将二维数组写入 excel 文件，可以使用 apache poi 库。以下步骤展示如何实现：

引入 maven 依赖

<dependency>
    <groupid>org.apache.poi</groupid>
    <artifactid>poi</artifactid>
    <version>3.17</version>
</dependency>
<dependency>
    <groupid>org.apache.poi</groupid>
    <artifactid>poi-ooxml</artifactid>
    <version>3.17</version>
</dependency>

创建工作簿和工作表

Apache Superset Dashboard and SQL Exploration Skill

Apache Superset 是一个广泛采用的开源 BI 平台，用于 SQL 探索、图表构建和仪表板交付。当代理需要查询仓库数据、组装仪表板或使用成熟的分析界面解释指标而不是临时笔记本代码时，此技能非常有用。

下载

xssfworkbook workbook = new xssfworkbook();
xssfsheet sheet = workbook.createsheet("worksheet");

创建表头

xssfrow row = sheet.createrow(0);
for (int i = 0; i < headlist.size(); i++) {
    xssfcell cell = row.createcell(i);
    cell.setcellvalue(headlist.get(i));
}

写入数据

for (int i = 0; i < contentlist.size(); i++) {
    row = sheet.createrow(i + 1);
    for (int j = 0; j < contentlist.get(i).size(); j++) {
        row.createcell(j).setcellvalue(contentlist.get(i).get(j));
    }
}

保存文件

xssfworkbook workbook = new xssfworkbook();
workbook.write(new fileoutputstream(file));
workbook.close();

示例代码

import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class WriteToExcel {

    public static void main(String[] args) {
        // 表头测试数据
        List<String> headList = new ArrayList<>();
        headList.add("昵称");
        headList.add("年龄");

        // 内容测试数据
        List<List<String>> contentList = getContent();

        // 创建工作簿和工作表
        XSSFWorkbook workbook = new XSSFWorkbook();
        XSSFSheet sheet = workbook.createSheet("WorkSheet");

        // 设置表头
        XSSFRow row = sheet.createRow(0);
        for (int i = 0; i < headList.size(); i++) {
            XSSFCell cell = row.createCell(i);
            cell.setCellValue(headList.get(i));
        }

        // 设置内容
        for (int i = 0; i < contentList.size(); i++) {
            row = sheet.createRow(i + 1);
            for (int j = 0; j < contentList.get(i).size(); j++) {
                row.createCell(j).setCellValue(contentList.get(i).get(j));
            }
        }

        // 保存文件
        try {
            workbook.write(new FileOutputStream("D://work.xls"));
            workbook.close();
            System.out.println("写入成功");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    protected static List<List<String>> getContent() {
        List<List<String>> contentList = new ArrayList<>();
        List<String> content1 = new ArrayList<>();
        content1.add("张三");
        content1.add("18");
        List<String> content2 = new ArrayList<>();
        content2.add("李四");
        content2.add("20");
        contentList.add(content1);
        contentList.add(content2);
        return contentList;
    }
}