实用： 将程序的内容写出到excel中

pom

<!-- 读取excel文件 -->
<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>

实体

public class CowRecord {

    private String code;
    private String year;
}

写逻辑

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

import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

public class WriteExcel {

    public static void main(String[] args) {
        List<CowRecord> list = new ArrayList<CowRecord>();
        for (int i = 0; i < 10; i++) {
            CowRecord cowRecord = new CowRecord();
            cowRecord.setCode("code" + i);
            cowRecord.setYear("year" + i);
            list.add(cowRecord);
        }
        write(list);
    }

    public static void write(List<CowRecord> sortList) {
        // 创建工作薄
        HSSFWorkbook workbook = new HSSFWorkbook();
        // 创建工作表
        HSSFSheet sheet = workbook.createSheet("sheet1");

        int rowNum = sortList.size() + 1;
        for (int row = 0; row < rowNum; row++) {
            HSSFRow rows = sheet.createRow(row);
            //表头
            if(row ==0){
                rows.createCell(0).setCellValue("证券代码");
                rows.createCell(1).setCellValue("会计期间'");

            }else{
                CowRecord cowData = sortList.get(row - 1);
                for (int col = 0; col < 30; col++) {
                    // 向工作表中添加数据
                    switch (col){
                        case 0:
                            rows.createCell(col).setCellValue(cowData.getCode());
                            break;
                        case 1:
                            rows.createCell(col).setCellValue(cowData.getYear());
                            break;
                    }
                }
            }
        }

        try {
            File xlsFile = new File("/Users/t/Desktop/data/w.xls");
            FileOutputStream xlsStream = new FileOutputStream(xlsFile);
            workbook.write(xlsStream);
        }catch (Exception e){
            e.printStackTrace();
        }
    }
}