java中的数据导出到Excel表中

整个项目中导出数据到.Excel的源码

 import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import Vo.SellAnimal;

public class FileUtils {
    public static final String SEPARATE_FIELD = ",";// 逗号分隔符
    public static final String SEPARATE_LINE = "\r\n";// 行分隔符

    public static void saveAniaml(SellAnimal animal) {
        Date data = new Date(); // 获取系统时间
        SimpleDateFormat fmort = new SimpleDateFormat("yyyyMMdd");// 注时间格式
        String time = "销售记录" + fmort.format(data) + ".csv";
        InputStream in = null; // 输入流，读取文件的内容
        try {
            in = new FileInputStream(time);//向上转型
            if (in != null) {
                in.close();
                creatfile(time, true, animal);// 在已有文件的后面接着写
            }

        } catch (FileNotFoundException e) {
            creatfile(time, false, animal);// 创建新的文件

        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public static void creatfile(String time, boolean object, SellAnimal animal) {
        // TODO Auto-generated method stub
        BufferedOutputStream out = null;// 字节缓冲流
        StringBuffer str = new StringBuffer();
        try {
            if (object) {
                out = new BufferedOutputStream(new FileOutputStream(time, true));
            } else {
                out = new BufferedOutputStream(new FileOutputStream(time));
                String[] filesort = { "宠物名称", "宠物编号", "宠物品种", "宠物数量", "宠物单价(/元)", "总价" };
                for (String fieldKey : filesort) {
                    str.append(fieldKey).append(SEPARATE_FIELD); 
                }
            }
            str.append(SEPARATE_LINE);
            str.append(animal.getName()).append(SEPARATE_FIELD);
            str.append(animal.getNum()).append(SEPARATE_FIELD);
            str.append(animal.getPin()).append(SEPARATE_FIELD);
            str.append(animal.getShu()).append(SEPARATE_FIELD);
            str.append(animal.getPrice()).append(SEPARATE_FIELD);
            str.append(animal.getMoney()).append(SEPARATE_FIELD);
            String str1 = str.toString();
            byte[] shu = str1.getBytes();
            for (int i = 0; i < shu.length; i++) {
                out.write(shu[i]);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (out != null) {
                try {
                    out.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }

    }
}