Java Excel导出

package com.gome.budget.common.utils;

import com.alibaba.excel.EasyExcelFactory;
import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.metadata.Sheet;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;

public class ExcelExportUtil {

    public static void main(String[] args) throws FileNotFoundException {

        List> header = createTestListStringHead();
        List> dataLists = createTestListObject();

        OutputStream os = new FileOutputStream("D:\\share\\expense.xlsx");
        ExcelExportUtil exporter = new ExcelExportUtil();
        exporter.initWriter(os);
        exporter.createSheet(1, 0, "损益表2", header)
                .writeDatas(dataLists);

        exporter.createSheet(2, 0, "费用表2", header)
                .writeDatas(dataLists);

        exporter.close();
    }

    public ExcelExportUtil() {
    }
    public static List> createTestListStringHead() {
        List> header = new ArrayList>();
        List headList = new ArrayList();
        headList.add("预算组织");
        header.add(headList);

        headList = new ArrayList();
        headList.add("项目");
        header.add(headList);

        headList = new ArrayList();
        headList.add("前2个考核期实际数");
        header.add(headList);

        headList = new ArrayList();
        headList.add("前1个考核期发生月实际数");
        header.add(headList);

        headList = new ArrayList();
        headList.add("前1个考核期未发生月预测数");
        header.add(headList);

        headList = new ArrayList();
        headList.add("前1个考核期预测数");
        header.add(headList);

        headList = new ArrayList();
        headList.add("当前考核期上报数");
        header.add(headList);

        headList = new ArrayList();
        headList.add("同比");
        header.add(headList);

        headList = new ArrayList();
        headList.add("环比");
        header.add(headList);

        return header;
    }
    public static List> createTestListObject() {
        List> dataList = new ArrayList>();
        List