java-excel-把数据放到excel中去

如果觉得写得可以或者太差就评论一下或者赞一下呗,多谢支持!!

1.需要的jar包:

<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.15</version>
</dependency>

<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.14</version>

</dependency>

import java.io.FileOutputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;

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

public class test {
    /**
     * @功能：手工构建一个简单格式的Excel
     */
    public static void main(String[] args) {
        //excel的头
        String[] head = {"第一列","第二列","第三列","第四列","第五列"};
        //要存储的数据
        ArrayList<ArrayList<Object>> data = new ArrayList<ArrayList<Object>>();
        for(int i=0;i<10;i++){
            ArrayList<Object> arrayList = new ArrayList();
            arrayList.add(1);
            arrayList.add("你好呀");
            arrayList.add(1.5);
            arrayList.add(new Date());
            arrayList.add(1100);
            data.add(arrayList);
        }
        //要存储的路径
        String path = "D:\\游戏\\sss.xls";
        //创建第一个sheet
        HSSFWorkbook wb1 = createExcel(head,data, "用户表一");
        //创建第二个sheet
        wb1 =addSheet(head,data, wb1,"用户表二");
        
        try {
            FileOutputStream fout = new FileOutputStream(path);
            wb1.write(fout);
            fout.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
    //创建第一个sheet
    public static HSSFWorkbook createExcel(String[] heads, ArrayList<ArrayList<Object>> data, String sheetName){
        // 创建一个webbook，对应一个Excel文件
        HSSFWorkbook wb = new HSSFWorkbook();
        return addSheet(heads,data ,wb,sheetName);
    }
    
    //创建第二个sheet
    public static HSSFWorkbook addSheet(String[] heads, ArrayList<ArrayList<Object>> data, HSSFWorkbook wb,String sheetName){
        HSSFSheet sheet = wb.createSheet(sheetName);
        //在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制short
        HSSFRow row = sheet.createRow((int) 0);
        //创建单元格，并设置值表头 设置表头居中
        HSSFCellStyle style = wb.createCellStyle();
        style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式
        HSSFCell cell;
        for(int i=0;i<heads.length;i++){
            cell = row.createCell((short)i);
            cell.setCellValue(heads[i]);
            cell.setCellStyle(style);
        }

        for (int i = 0; i < data.size(); i++)
        {
            row = sheet.createRow((int) i + 1);
            for(int j =0;j<(data.get(i)).size();j++){
                if(data.get(i).get(j) instanceof String){
                    row.createCell((short)j).setCellValue(String.valueOf(data.get(i).get(j)));
                }
                if(data.get(i).get(j) instanceof Double){
                    row.createCell((short)j).setCellValue((Double) data.get(i).get(j));
                }
                if(data.get(i).get(j) instanceof Integer){
                    row.createCell((short)j).setCellValue((Integer)data.get(i).get(j));
                }
                if(data.get(i).get(j) instanceof Date){
                    row.createCell((short)j).setCellValue( new SimpleDateFormat("yyyy年mm月dd日").format(data.get(i).get(j)));
                }
            }
        }
        return wb;
    }
}

java-excel-把数据放到excel中去

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