java-生成excel表格(多sheet)

java生成excel表格，多sheet，代码拿过来就能用呢~~~
pom文件：

  org.apache.poi
  poi-ooxml
  3.9


  org.apache.poi
  poi-ooxml-schemas
  3.9


  org.apache.poi
  poi-scratchpad
  3.9

java代码

import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;

/**
 * Created by dell on 2018-04-12.
 */
public class ExportExcel {
    //主程序测试
    public static void main(String[] args) {
        HashMap es_map = new HashMap ();
        List> ip_list = new LinkedList>();
        for (int i = 1; i <=10 ; i++) {
            HashMap m1 = new HashMap();
            m1.put("a",1*i);
            m1.put("b",2*i);
            m1.put("c",3*i);
            ip_list.add(m1);
        }
        es_map.put("ip",ip_list);
        List> uv_list = new LinkedList>();
        for (int i = 1; i <=10 ; i++) {
            HashMap m2 = new HashMap();
            m2.put("d",1*i);
            m2.put("e",2*i);
            m2.put("f",3*i);
            uv_list.add(m2);
        }
        es_map.put("uv",uv_list);
        //生成excel表格并返回文件地址
        String filepath = exportDetailData("20180401", "F://", es_map);

        System.out.print(filepath);
    }

    /**
     * @author yanawang
     * @Title: exportDetailData
     * @Description: 生成excel文件
     * @date 2018-4-10 下午 05:45
     */
    public static String exportDetailData(String dt, String basepath, HashMap es_map) {

        SXSSFWorkbook workbook = new SXSSFWorkbook(100);
        //第一个sheet
        //表头
        String classHead[] = {"A", "B", "C"};
        //list中map的key值.与表头顺序需对应
        String[] row_str = {"a", "b", "c"};
        if (es_map.containsKey("ip")) {
            setSheet(workbook, classHead, "日均独立IP", row_str, (List>) es_map.get("ip"));
        }
        //第二个sheet
        classHead = new String[]{"D", "E", "F"};
        row_str = new String[]{"d", "e", "f"};
        if (es_map.containsKey("uv")) {
            setSheet(workbook, classHead, "新注册用户总数", row_str, (List>) es_map.get("uv"));
        }
        //生成文件
        File file1 = new File(basepath + "exportExcel");
        file1.mkdir();
        String fileName = "";
        fileName = "weeklydata" + dt;
        String filePath = "exportExcel/" + fileName + ".xlsx";
        exportExcel(workbook, basepath + filePath);
        return basepath + filePath;
    }

    /**
     * @author yanawang
     * @Title: setSheet
     * @Description: 增加sheet
     * @date 2018-4-11 下午 06:51
     * 参数:表格对象，表头数据，sheet名称，list中map的key数组，list
     */
    public static void setSheet(SXSSFWorkbook workbook, String[] classHead, String sheetname, String[] row_str, List> list) {
        if (list.size() > 0) {
            //设置表格样式
            CellStyle style = workbook.createCellStyle();
            style.setFillPattern(CellStyle.SOLID_FOREGROUND);
            style.setFillForegroundColor(HSSFColor.GREY_25_PERCENT.index);
            Sheet sheet = workbook.createSheet(sheetname);

            CellStyle style1 = workbook.createCellStyle();
            Row row_h = sheet.createRow(0);
            //设置表头
            for (int x = 0; x < classHead.length; x++) {
                Cell cell = row_h.createCell(x);
                cell.setCellStyle(style);
                //单元格宽度
                sheet.setColumnWidth(x, 3000);
                cell.setCellValue(classHead[x]);
            }
            //设置单元格内容
            for (int i = 0; i < list.size(); i++) {
                Row row = sheet.createRow(i + 1);
                for (int j = 0; j < row_str.length; j++) {
                    row.createCell(j).setCellValue(list.get(i).get(row_str[j]).toString());
                }
            }
        }

    }

    /**
     * @author yanawang
     * @Title: exportExcel
     * @Description: 生成excel文件流
     * @date 2017-10-12 上午 09:18
     */
    public static void exportExcel(Workbook workbook, String fileName) {
        OutputStream os = null;
        try {
            os = new FileOutputStream(new File(fileName));
            workbook.write(os);
            System.out.println(fileName);
            os.flush();
//          os.close();
        } catch (Exception e) {
        } finally {
            closeOs(os);
        }
    }
    
    public static void closeOs(OutputStream out) {
        if (out != null) {
            try {
                out.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            out = null;
        }
    }


}