JeeSite中实现导入导出Excel步骤

闲话 少说  直接 上 代码

springMVC项目 

JSP页面代码如下

JSP页面 引用的table标签

importExcel.tag

<%@ tag language="java" pageEncoding="UTF-8"%>
<%@ include file="/webpage/include/taglib.jsp"%>
<%@ attribute name="url" type="java.lang.String" required="true"%>
<%-- 使用方法： 1.将本tag写在查询的form之前；2.传入controller的url --%>
 导入

		


			导入文件不能超过5M，仅允许导入“xls”或“xlsx”格式文件！
　　
			
			
		

exportExcel.tag

<%@ tag language="java" pageEncoding="UTF-8"%>
<%@ include file="/webpage/include/taglib.jsp"%>
<%@ attribute name="url" type="java.lang.String" required="true"%>
<%-- 使用方法： 1.将本tag写在查询的form之前；2.传入url --%>
 导出

实现 导入导入 Excel功能的Controller

@Controller
@RequestMapping(value = "${adminPath}/echarts/memPutInto")

	/**
	 * 导出excel文件
	 */
	@RequiresPermissions("echarts:memPutInto:export")
    @RequestMapping(value = "export", method=RequestMethod.POST)
    public String exportFile(MemPutInto memPutInto, HttpServletRequest request, HttpServletResponse response, RedirectAttributes redirectAttributes) {
		try {
            String fileName = "员工投入状况"+DateUtils.getDate("yyyyMMddHHmmss")+".xlsx";
            Page page = memPutIntoService.findPage(new Page(request, response, -1), memPutInto);
    		new ExportExcel("员工投入状况", MemPutInto.class).setDataList(page.getList()).write(response, fileName).dispose();
    		return null;
		} catch (Exception e) {
			addMessage(redirectAttributes, "导出员工投入状况记录失败！失败信息："+e.getMessage());
		}
		return "redirect:"+Global.getAdminPath()+"/echarts/memPutInto/?repage";
    }

	/**
	 * 导入Excel数据

	 */
	@RequiresPermissions("echarts:memPutInto:import")
    @RequestMapping(value = "import", method=RequestMethod.POST)
    public String importFile(MultipartFile file, RedirectAttributes redirectAttributes) {
		try {
			int successNum = 0;
			int failureNum = 0;
			StringBuilder failureMsg = new StringBuilder();
			ImportExcel ei = new ImportExcel(file, 1, 0);
			List list = ei.getDataList(MemPutInto.class);
			for (MemPutInto memPutInto : list){
				try{
					memPutIntoService.save(memPutInto);
					successNum++;
				}catch(ConstraintViolationException ex){
					failureNum++;
				}catch (Exception ex) {
					failureNum++;
				}
			}
			if (failureNum>0){
				failureMsg.insert(0, "，失败 "+failureNum+" 条员工投入状况记录。");
			}
			addMessage(redirectAttributes, "已成功导入 "+successNum+" 条员工投入状况记录"+failureMsg);
		} catch (Exception e) {
			addMessage(redirectAttributes, "导入员工投入状况失败！失败信息："+e.getMessage());
		}
		return "redirect:"+Global.getAdminPath()+"/echarts/memPutInto/?repage";
    }
	
	/**
	 * 下载导入员工投入状况数据模板
	 */
	@RequiresPermissions("echarts:memPutInto:import")
    @RequestMapping(value = "import/template")
    public String importFileTemplate(HttpServletResponse response, RedirectAttributes redirectAttributes) {
		try {
            String fileName = "员工投入状况数据导入模板.xlsx";
    		List list = Lists.newArrayList(); 
    		new ExportExcel("员工投入状况数据", MemPutInto.class, 1).setDataList(list).write(response, fileName).dispose();
    		return null;
		} catch (Exception e) {
			addMessage(redirectAttributes, "导入模板下载失败！失败信息："+e.getMessage());
		}
		return "redirect:"+Global.getAdminPath()+"/echarts/memPutInto/?repage";
    }
	
	

Controller调用的工具类

ImportExcel.java

/**
 * Copyright © 2015-2020 JeePlus All rights reserved.
 */
package com.jeeplus.common.utils.excel;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.text.NumberFormat;
import java.text.SimpleDateFormat;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.List;

import org.apache.commons.lang3.StringUtils;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.MultipartFile;

import com.google.common.collect.Lists;
import com.jeeplus.common.utils.Reflections;
import com.jeeplus.common.utils.excel.annotation.ExcelField;
import com.jeeplus.modules.sys.entity.Area;
import com.jeeplus.modules.sys.entity.Office;
import com.jeeplus.modules.sys.entity.User;
import com.jeeplus.modules.sys.utils.DictUtils;
import com.jeeplus.modules.sys.utils.UserUtils;

/**
 * 导入Excel文件（支持“XLS”和“XLSX”格式）
 * @author jeeplus
 * @version 2013-03-10
 */
public class ImportExcel {
	
	private static Logger log = LoggerFactory.getLogger(ImportExcel.class);
			
	/**
	 * 工作薄对象
	 */
	private Workbook wb;
	
	/**
	 * 工作表对象
	 */
	private Sheet sheet;
	
	/**
	 * 标题行号
	 */
	private int headerNum;
	
	/**
	 * 构造函数
	 * @param path 导入文件，读取第一个工作表
	 * @param headerNum 标题行号，数据行号=标题行号+1
	 * @throws InvalidFormatException 
	 * @throws IOException 
	 */
	public ImportExcel(String fileName, int headerNum) 
			throws InvalidFormatException, IOException {
		this(new File(fileName), headerNum);
	}
	
	/**
	 * 构造函数
	 * @param path 导入文件对象，读取第一个工作表
	 * @param headerNum 标题行号，数据行号=标题行号+1
	 * @throws InvalidFormatException 
	 * @throws IOException 
	 */
	public ImportExcel(File file, int headerNum) 
			throws InvalidFormatException, IOException {
		this(file, headerNum, 0);
	}

	/**
	 * 构造函数
	 * @param path 导入文件
	 * @param headerNum 标题行号，数据行号=标题行号+1
	 * @param sheetIndex 工作表编号
	 * @throws InvalidFormatException 
	 * @throws IOException 
	 */
	public ImportExcel(String fileName, int headerNum, int sheetIndex) 
			throws InvalidFormatException, IOException {
		this(new File(fileName), headerNum, sheetIndex);
	}
	
	/**
	 * 构造函数
	 * @param path 导入文件对象
	 * @param headerNum 标题行号，数据行号=标题行号+1
	 * @param sheetIndex 工作表编号
	 * @throws InvalidFormatException 
	 * @throws IOException 
	 */
	public ImportExcel(File file, int headerNum, int sheetIndex) 
			throws InvalidFormatException, IOException {
		this(file.getName(), new FileInputStream(file), headerNum, sheetIndex);
	}
	
	/**
	 * 构造函数
	 * @param file 导入文件对象
	 * @param headerNum 标题行号，数据行号=标题行号+1
	 * @param sheetIndex 工作表编号
	 * @throws InvalidFormatException 
	 * @throws IOException 
	 */
	public ImportExcel(MultipartFile multipartFile, int headerNum, int sheetIndex) 
			throws InvalidFormatException, IOException {
		this(multipartFile.getOriginalFilename(), multipartFile.getInputStream(), headerNum, sheetIndex);
	}

	/**
	 * 构造函数
	 * @param path 导入文件对象
	 * @param headerNum 标题行号，数据行号=标题行号+1
	 * @param sheetIndex 工作表编号
	 * @throws InvalidFormatException 
	 * @throws IOException 
	 */
	public ImportExcel(String fileName, InputStream is, int headerNum, int sheetIndex) 
			throws InvalidFormatException, IOException {
		if (StringUtils.isBlank(fileName)){
			throw new RuntimeException("导入文档为空!");
		}else if(fileName.toLowerCase().endsWith("xls")){    
			this.wb = new HSSFWorkbook(is);    
        }else if(fileName.toLowerCase().endsWith("xlsx")){  
        	this.wb = new XSSFWorkbook(is);
        }else{  
        	throw new RuntimeException("文档格式不正确!");
        }  
		if (this.wb.getNumberOfSheets() List getDataList(Class cls, int... groups) throws InstantiationException, IllegalAccessException{
		List annotationList = Lists.newArrayList();
		// Get annotation field 
		Field[] fs = cls.getDeclaredFields();
		for (Field f : fs){
			ExcelField ef = f.getAnnotation(ExcelField.class);
			if (ef != null && (ef.type()==0 || ef.type()==2)){
				if (groups!=null && groups.length>0){
					boolean inGroup = false;
					for (int g : groups){
						if (inGroup){
							break;
						}
						for (int efg : ef.groups()){
							if (g == efg){
								inGroup = true;
								annotationList.add(new Object[]{ef, f});
								break;
							}
						}
					}
				}else{
					annotationList.add(new Object[]{ef, f});
				}
			}
		}
		// Get annotation method
		Method[] ms = cls.getDeclaredMethods();
		for (Method m : ms){
			ExcelField ef = m.getAnnotation(ExcelField.class);
			if (ef != null && (ef.type()==0 || ef.type()==2)){
				if (groups!=null && groups.length>0){
					boolean inGroup = false;
					for (int g : groups){
						if (inGroup){
							break;
						}
						for (int efg : ef.groups()){
							if (g == efg){
								inGroup = true;
								annotationList.add(new Object[]{ef, m});
								break;
							}
						}
					}
				}else{
					annotationList.add(new Object[]{ef, m});
				}
			}
		}
		// Field sorting
		Collections.sort(annotationList, new Comparator() {
			public int compare(Object[] o1, Object[] o2) {
				return new Integer(((ExcelField)o1[0]).sort()).compareTo(
						new Integer(((ExcelField)o2[0]).sort()));
			};
		});
		//log.debug("Import column count:"+annotationList.size());
		// Get excel data
		List dataList = Lists.newArrayList();
		for (int i = this.getDataRowNum(); i < this.getLastDataRowNum(); i++) {
			E e = (E)cls.newInstance();
			int column = 0;
			Row row = this.getRow(i);
			StringBuilder sb = new StringBuilder();
			for (Object[] os : annotationList){
				Object val = this.getCellValue(row, column++);
				if (val != null){
					ExcelField ef = (ExcelField)os[0];
					// If is dict type, get dict value
					if (StringUtils.isNotBlank(ef.dictType())){
						val = DictUtils.getDictValue(val.toString(), ef.dictType(), "");
						//log.debug("Dictionary type value: ["+i+","+colunm+"] " + val);
					}
					// Get param type and type cast
					Class valType = Class.class;
					if (os[1] instanceof Field){
						valType = ((Field)os[1]).getType();
					}else if (os[1] instanceof Method){
						Method method = ((Method)os[1]);
						if ("get".equals(method.getName().substring(0, 3))){
							valType = method.getReturnType();
						}else if("set".equals(method.getName().substring(0, 3))){
							valType = ((Method)os[1]).getParameterTypes()[0];
						}
					}
					//log.debug("Import value type: ["+i+","+column+"] " + valType);
					try {
						//如果导入的java对象，需要在这里自己进行变换。
						if (valType == String.class){
							String s = String.valueOf(val.toString());
							if(StringUtils.endsWith(s, ".0")){
								val = StringUtils.substringBefore(s, ".0");
							}else{
								val = String.valueOf(val.toString());
							}
						}else if (valType == Integer.class){
							val = Double.valueOf(val.toString()).intValue();
						}else if (valType == Long.class){
							val = Double.valueOf(val.toString()).longValue();
						}else if (valType == Double.class){
							val = Double.valueOf(val.toString());
						}else if (valType == Float.class){
							val = Float.valueOf(val.toString());
						}else if (valType == Date.class){
							SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
							val=sdf.parse(val.toString()); 
						}else if (valType == User.class){
							val = UserUtils.getByUserName(val.toString());
						}else if (valType == Office.class){
							val = UserUtils.getByOfficeName(val.toString());
						}else if (valType == Area.class){
							val = UserUtils.getByAreaName(val.toString());
						}else{
							if (ef.fieldType() != Class.class){
								val = ef.fieldType().getMethod("getValue", String.class).invoke(null, val.toString());
							}else{
								val = Class.forName(this.getClass().getName().replaceAll(this.getClass().getSimpleName(), 
										"fieldtype."+valType.getSimpleName()+"Type")).getMethod("getValue", String.class).invoke(null, val.toString());
							}
						}
					} catch (Exception ex) {
						log.info("Get cell value ["+i+","+column+"] error: " + ex.toString());
						val = null;
					}
					// set entity value
					if (os[1] instanceof Field){
						Reflections.invokeSetter(e, ((Field)os[1]).getName(), val);
					}else if (os[1] instanceof Method){
						String mthodName = ((Method)os[1]).getName();
						if ("get".equals(mthodName.substring(0, 3))){
							mthodName = "set"+StringUtils.substringAfter(mthodName, "get");
						}
						Reflections.invokeMethod(e, mthodName, new Class[] {valType}, new Object[] {val});
					}
				}
				sb.append(val+", ");
			}
			dataList.add(e);
			log.debug("Read success: ["+i+"] "+sb.toString());
		}
		return dataList;
	}

//	/**
//	 * 导入测试
//	 */
//	public static void main(String[] args) throws Throwable {
//		
//		ImportExcel ei = new ImportExcel("target/export.xlsx", 1);
//		
//		for (int i = ei.getDataRowNum(); i < ei.getLastDataRowNum(); i++) {
//			Row row = ei.getRow(i);
//			for (int j = 0; j < ei.getLastCellNum(); j++) {
//				Object val = ei.getCellValue(row, j);
//				System.out.print(val+", ");
//			}
//			System.out.print("\n");
//		}
//		
//	}

}

工具类

ExportExcel.java

/**
 * Copyright © 2015-2020 JeePlus All rights reserved.
 */
package com.jeeplus.common.utils.excel;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Comment;
import org.apache.poi.ss.usermodel.DataFormat;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFClientAnchor;
import org.apache.poi.xssf.usermodel.XSSFRichTextString;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.collect.Lists;
import com.jeeplus.common.utils.Encodes;
import com.jeeplus.common.utils.Reflections;
import com.jeeplus.common.utils.excel.annotation.ExcelField;
import com.jeeplus.modules.sys.utils.DictUtils;

/**
 * 导出Excel文件（导出“XLSX”格式，支持大数据量导出   @see org.apache.poi.ss.SpreadsheetVersion）
 * @author jeeplus
 * @version 2013-04-21
 */
public class ExportExcel {
	
	private static Logger log = LoggerFactory.getLogger(ExportExcel.class);
			
	/**
	 * 工作薄对象
	 */
	private SXSSFWorkbook wb;
	
	/**
	 * 工作表对象
	 */
	private Sheet sheet;
	
	/**
	 * 样式列表
	 */
	private Map styles;
	
	/**
	 * 当前行号
	 */
	private int rownum;
	
	/**
	 * 注解列表（Object[]{ ExcelField, Field/Method }）
	 */
	List annotationList = Lists.newArrayList();
	
	/**
	 * 构造函数
	 * @param title 表格标题，传“空值”，表示无标题
	 * @param cls 实体对象，通过annotation.ExportField获取标题
	 */
	public ExportExcel(String title, Class cls){
		this(title, cls, 1);
	}
	
	/**
	 * 构造函数
	 * @param title 表格标题，传“空值”，表示无标题
	 * @param cls 实体对象，通过annotation.ExportField获取标题
	 * @param type 导出类型（1:导出数据；2：导出模板）
	 * @param groups 导入分组
	 */
	public ExportExcel(String title, Class cls, int type, int... groups){
		// Get annotation field 
		Field[] fs = cls.getDeclaredFields();
		for (Field f : fs){
			ExcelField ef = f.getAnnotation(ExcelField.class);
			if (ef != null && (ef.type()==0 || ef.type()==type)){
				if (groups!=null && groups.length>0){
					boolean inGroup = false;
					for (int g : groups){
						if (inGroup){
							break;
						}
						for (int efg : ef.groups()){
							if (g == efg){
								inGroup = true;
								annotationList.add(new Object[]{ef, f});
								break;
							}
						}
					}
				}else{
					annotationList.add(new Object[]{ef, f});
				}
			}
		}
		// Get annotation method
		Method[] ms = cls.getDeclaredMethods();
		for (Method m : ms){
			ExcelField ef = m.getAnnotation(ExcelField.class);
			if (ef != null && (ef.type()==0 || ef.type()==type)){
				if (groups!=null && groups.length>0){
					boolean inGroup = false;
					for (int g : groups){
						if (inGroup){
							break;
						}
						for (int efg : ef.groups()){
							if (g == efg){
								inGroup = true;
								annotationList.add(new Object[]{ef, m});
								break;
							}
						}
					}
				}else{
					annotationList.add(new Object[]{ef, m});
				}
			}
		}
		// Field sorting
		Collections.sort(annotationList, new Comparator() {
			public int compare(Object[] o1, Object[] o2) {
				return new Integer(((ExcelField)o1[0]).sort()).compareTo(
						new Integer(((ExcelField)o2[0]).sort()));
			};
		});
		// Initialize
		List headerList = Lists.newArrayList();
		for (Object[] os : annotationList){
			String t = ((ExcelField)os[0]).title();
			// 如果是导出，则去掉注释
			if (type==1){
				String[] ss = StringUtils.split(t, "**", 2);
				if (ss.length==2){
					t = ss[0];
				}
			}
			headerList.add(t);
		}
		initialize(title, headerList);
	}
	
	/**
	 * 构造函数
	 * @param title 表格标题，传“空值”，表示无标题
	 * @param headers 表头数组
	 */
	public ExportExcel(String title, String[] headers) {
		initialize(title, Lists.newArrayList(headers));
	}
	
	/**
	 * 构造函数
	 * @param title 表格标题，传“空值”，表示无标题
	 * @param headerList 表头列表
	 */
	public ExportExcel(String title, List headerList) {
		initialize(title, headerList);
	}
	
	/**
	 * 初始化函数
	 * @param title 表格标题，传“空值”，表示无标题
	 * @param headerList 表头列表
	 */
	private void initialize(String title, List headerList) {
		this.wb = new SXSSFWorkbook(500);
		this.sheet = wb.createSheet("Export");
		this.styles = createStyles(wb);
		// Create title
		if (StringUtils.isNotBlank(title)){
			Row titleRow = sheet.createRow(rownum++);
			titleRow.setHeightInPoints(30);
			Cell titleCell = titleRow.createCell(0);
			titleCell.setCellStyle(styles.get("title"));
			titleCell.setCellValue(title);
			sheet.addMergedRegion(new CellRangeAddress(titleRow.getRowNum(),
					titleRow.getRowNum(), titleRow.getRowNum(), headerList.size()-1));
		}
		// Create header
		if (headerList == null){
			throw new RuntimeException("headerList not null!");
		}
		Row headerRow = sheet.createRow(rownum++);
		headerRow.setHeightInPoints(16);
		for (int i = 0; i < headerList.size(); i++) {
			Cell cell = headerRow.createCell(i);
			cell.setCellStyle(styles.get("header"));
			String[] ss = StringUtils.split(headerList.get(i), "**", 2);
			if (ss.length==2){
				cell.setCellValue(ss[0]);
				Comment comment = this.sheet.createDrawingPatriarch().createCellComment(
						new XSSFClientAnchor(0, 0, 0, 0, (short) 3, 3, (short) 5, 6));
				comment.setString(new XSSFRichTextString(ss[1]));
				cell.setCellComment(comment);
			}else{
				cell.setCellValue(headerList.get(i));
			}
			sheet.autoSizeColumn(i);
		}
		for (int i = 0; i < headerList.size(); i++) {  
			int colWidth = sheet.getColumnWidth(i)*2;
	        sheet.setColumnWidth(i, colWidth < 3000 ? 3000 : colWidth);  
		}
		log.debug("Initialize success.");
	}
	
	/**
	 * 创建表格样式
	 * @param wb 工作薄对象
	 * @return 样式列表
	 */
	private Map createStyles(Workbook wb) {
		Map styles = new HashMap();
		
		CellStyle style = wb.createCellStyle();
		style.setAlignment(CellStyle.ALIGN_CENTER);
		style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
		Font titleFont = wb.createFont();
		titleFont.setFontName("Arial");
		titleFont.setFontHeightInPoints((short) 16);
		titleFont.setBoldweight(Font.BOLDWEIGHT_BOLD);
		style.setFont(titleFont);
		styles.put("title", style);

		style = wb.createCellStyle();
		style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
		style.setBorderRight(CellStyle.BORDER_THIN);
		style.setRightBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
		style.setBorderLeft(CellStyle.BORDER_THIN);
		style.setLeftBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
		style.setBorderTop(CellStyle.BORDER_THIN);
		style.setTopBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
		style.setBorderBottom(CellStyle.BORDER_THIN);
		style.setBottomBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
		Font dataFont = wb.createFont();
		dataFont.setFontName("Arial");
		dataFont.setFontHeightInPoints((short) 10);
		style.setFont(dataFont);
		styles.put("data", style);
		
		style = wb.createCellStyle();
		style.cloneStyleFrom(styles.get("data"));
		style.setAlignment(CellStyle.ALIGN_LEFT);
		styles.put("data1", style);

		style = wb.createCellStyle();
		style.cloneStyleFrom(styles.get("data"));
		style.setAlignment(CellStyle.ALIGN_CENTER);
		styles.put("data2", style);

		style = wb.createCellStyle();
		style.cloneStyleFrom(styles.get("data"));
		style.setAlignment(CellStyle.ALIGN_RIGHT);
		styles.put("data3", style);
		
		style = wb.createCellStyle();
		style.cloneStyleFrom(styles.get("data"));
//		style.setWrapText(true);
		style.setAlignment(CellStyle.ALIGN_CENTER);
		style.setFillForegroundColor(IndexedColors.GREY_50_PERCENT.getIndex());
		style.setFillPattern(CellStyle.SOLID_FOREGROUND);
		Font headerFont = wb.createFont();
		headerFont.setFontName("Arial");
		headerFont.setFontHeightInPoints((short) 10);
		headerFont.setBoldweight(Font.BOLDWEIGHT_BOLD);
		headerFont.setColor(IndexedColors.WHITE.getIndex());
		style.setFont(headerFont);
		styles.put("header", style);
		
		return styles;
	}

	/**
	 * 添加一行
	 * @return 行对象
	 */
	public Row addRow(){
		return sheet.createRow(rownum++);
	}
	

	/**
	 * 添加一个单元格
	 * @param row 添加的行
	 * @param column 添加列号
	 * @param val 添加值
	 * @return 单元格对象
	 */
	public Cell addCell(Row row, int column, Object val){
		return this.addCell(row, column, val, 0, Class.class);
	}
	
	/**
	 * 添加一个单元格
	 * @param row 添加的行
	 * @param column 添加列号
	 * @param val 添加值
	 * @param align 对齐方式（1：靠左；2：居中；3：靠右）
	 * @return 单元格对象
	 */
	public Cell addCell(Row row, int column, Object val, int align, Class fieldType){
		Cell cell = row.createCell(column);
		CellStyle style = styles.get("data"+(align>=1&&align<=3?align:""));
		try {
			if (val == null){
				cell.setCellValue("");
			} else if (val instanceof String || val instanceof Integer || val instanceof Long 
								|| val instanceof Short || val instanceof Double || val instanceof Float) {
				cell.setCellValue(val.toString());
			} else if (val instanceof Date) {
				DataFormat format = wb.createDataFormat();
	            style.setDataFormat(format.getFormat("yyyy-MM-dd"));
				cell.setCellValue((Date) val);
			} else {
				if (fieldType != Class.class){
					cell.setCellValue((String)fieldType.getMethod("setValue", Object.class).invoke(null, val));
				}else{
					cell.setCellValue((String)Class.forName(this.getClass().getName().replaceAll(this.getClass().getSimpleName(), 
						"fieldtype."+val.getClass().getSimpleName()+"Type")).getMethod("setValue", Object.class).invoke(null, val));
				}
			}
		} catch (Exception ex) {
			log.info("Set cell value ["+row.getRowNum()+","+column+"] error: " + ex.toString());
			cell.setCellValue(val.toString());
		}
		cell.setCellStyle(style);
		return cell;
	}

	/**
	 * 添加数据（通过annotation.ExportField添加数据）
	 * @return list 数据列表
	 */
	public  ExportExcel setDataList(List list){
		for (E e : list){
			int colunm = 0;
			Row row = this.addRow();
			StringBuilder sb = new StringBuilder();
			for (Object[] os : annotationList){
				ExcelField ef = (ExcelField)os[0];
				Object val = null;
				// Get entity value
				try{
					if (StringUtils.isNotBlank(ef.value())){
						val = Reflections.invokeGetter(e, ef.value());
					}else{
						if (os[1] instanceof Field){
							val = Reflections.invokeGetter(e, ((Field)os[1]).getName());
						}else if (os[1] instanceof Method){
							val = Reflections.invokeMethod(e, ((Method)os[1]).getName(), new Class[] {}, new Object[] {});
						}
					}
					// If is dict, get dict label
					if (StringUtils.isNotBlank(ef.dictType())){
						val = DictUtils.getDictLabel(val==null?"":val.toString(), ef.dictType(), "");
					}
				}catch(Exception ex) {
					// Failure to ignore
					log.info(ex.toString());
					val = "";
				}
				this.addCell(row, colunm++, val, ef.align(), ef.fieldType());
				sb.append(val + ", ");
			}
			log.debug("Write success: ["+row.getRowNum()+"] "+sb.toString());
		}
		return this;
	}
	
	/**
	 * 输出数据流
	 * @param os 输出数据流
	 */
	public ExportExcel write(OutputStream os) throws IOException{
		wb.write(os);
		return this;
	}
	
	/**
	 * 输出到客户端
	 * @param fileName 输出文件名
	 */
	public ExportExcel write(HttpServletResponse response, String fileName) throws IOException{
		response.reset();
        response.setContentType("application/octet-stream; charset=utf-8");
        response.setHeader("Content-Disposition", "attachment; filename="+Encodes.urlEncode(fileName));
		write(response.getOutputStream());
		return this;
	}
	
	/**
	 * 输出到文件
	 * @param fileName 输出文件名
	 */
	public ExportExcel writeFile(String name) throws FileNotFoundException, IOException{
		FileOutputStream os = new FileOutputStream(name);
		this.write(os);
		return this;
	}
	
	/**
	 * 清理临时文件
	 */
	public ExportExcel dispose(){
		wb.dispose();
		return this;
	}
	
//	/**
//	 * 导出测试
//	 */
//	public static void main(String[] args) throws Throwable {
//		
//		List headerList = Lists.newArrayList();
//		for (int i = 1; i <= 10; i++) {
//			headerList.add("表头"+i);
//		}
//		
//		List dataRowList = Lists.newArrayList();
//		for (int i = 1; i <= headerList.size(); i++) {
//			dataRowList.add("数据"+i);
//		}
//		
//		List> dataList = Lists.newArrayList();
//		for (int i = 1; i <=1000000; i++) {
//			dataList.add(dataRowList);
//		}
//
//		ExportExcel ee = new ExportExcel("表格标题", headerList);
//		
//		for (int i = 0; i < dataList.size(); i++) {
//			Row row = ee.addRow();
//			for (int j = 0; j < dataList.get(i).size(); j++) {
//				ee.addCell(row, j, dataList.get(i).get(j));
//			}
//		}
//		ee.writeFile("target/export.xlsx");
//
//		ee.dispose();
//		
//		log.debug("Export success.");
//		
//	}

}

工具类

定义注解

ExcelField.java

 /**
 * Copyright © 2015-2020 JeePlus All rights reserved.
 */
package com.jeeplus.common.utils.excel.annotation;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Excel注解定义
 * @author jeeplus
 * @version 2013-03-10
 */
@Target({ElementType.METHOD, ElementType.FIELD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface ExcelField {

	/**
	 * 导出字段名（默认调用当前字段的“get”方法，如指定导出字段为对象，请填写“对象名.对象属性”，例：“area.name”、“office.name”）
	 */
	String value() default "";
	
	/**
	 * 导出字段标题（需要添加批注请用“**”分隔，标题**批注，仅对导出模板有效）
	 */
	String title();
	
	/**
	 * 字段类型（0：导出导入；1：仅导出；2：仅导入）
	 */
	int type() default 0;

	/**
	 * 导出字段对齐方式（0：自动；1：靠左；2：居中；3：靠右）
	 */
	int align() default 0;
	
	/**
	 * 导出字段字段排序（升序）
	 */
	int sort() default 0;

	/**
	 * 如果是字典类型，请设置字典的type值
	 */
	String dictType() default "";
	
	/**
	 * 反射类型
	 */
	Class fieldType() default Class.class;
	
	/**
	 * 字段归属组（根据分组导出导入）
	 */
	int[] groups() default {};
}

/**
 * Copyright © 2015-2020 JeePlus All rights reserved.
 */
package com.jeeplus.common.utils.excel.fieldtype;

import com.jeeplus.common.utils.StringUtils;
import com.jeeplus.modules.sys.entity.Area;
import com.jeeplus.modules.sys.utils.UserUtils;

/**
 * 字段类型转换
 * @author jeeplus
 * @version 2013-03-10
 */
public class AreaType {

	/**
	 * 获取对象值（导入）
	 */
	public static Object getValue(String val) {
		for (Area e : UserUtils.getAreaList()){
			if (StringUtils.trimToEmpty(val).equals(e.getName())){
				return e;
			}
		}
		return null;
	}

	/**
	 * 获取对象值（导出）
	 */
	public static String setValue(Object val) {
		if (val != null && ((Area)val).getName() != null){
			return ((Area)val).getName();
		}
		return "";
	}
}

/**
 * Copyright © 2015-2020 JeePlus All rights reserved.
 */
package com.jeeplus.common.utils.excel.fieldtype;

import com.jeeplus.common.utils.StringUtils;
import com.jeeplus.modules.sys.entity.Office;
import com.jeeplus.modules.sys.utils.UserUtils;

/**
 * 字段类型转换
 * @author jeeplus
 * @version 2013-03-10
 */
public class OfficeType {

	/**
	 * 获取对象值（导入）
	 */
	public static Object getValue(String val) {
		for (Office e : UserUtils.getOfficeList()){
			if (StringUtils.trimToEmpty(val).equals(e.getName())){
				return e;
			}
		}
		return null;
	}

	/**
	 * 设置对象值（导出）
	 */
	public static String setValue(Object val) {
		if (val != null && ((Office)val).getName() != null){
			return ((Office)val).getName();
		}
		return "";
	}
}

/**
 * Copyright © 2015-2020 JeePlus All rights reserved.
 */
package com.jeeplus.common.utils.excel.fieldtype;

import java.util.List;

import com.google.common.collect.Lists;
import com.jeeplus.common.utils.Collections3;
import com.jeeplus.common.utils.SpringContextHolder;
import com.jeeplus.common.utils.StringUtils;
import com.jeeplus.modules.sys.entity.Role;
import com.jeeplus.modules.sys.service.SystemService;

/**
 * 字段类型转换
 * @author jeeplus
 * @version 2013-5-29
 */
public class RoleListType {

	private static SystemService systemService = SpringContextHolder.getBean(SystemService.class);
	
	/**
	 * 获取对象值（导入）
	 */
	public static Object getValue(String val) {
		List roleList = Lists.newArrayList();
		List allRoleList = systemService.findAllRole();
		for (String s : StringUtils.split(val, ",")){
			for (Role e : allRoleList){
				if (StringUtils.trimToEmpty(s).equals(e.getName())){
					roleList.add(e);
				}
			}
		}
		return roleList.size()>0?roleList:null;
	}

	/**
	 * 设置对象值（导出）
	 */
	public static String setValue(Object val) {
		if (val != null){
			@SuppressWarnings("unchecked")
			List roleList = (List)val;
			return Collections3.extractToString(roleList, "name", ", ");
		}
		return "";
	}
	
}

具体 需要 jar包 可能有
相关 的jar包   poi-3.9.jar      poi-ooxml-3.9.jar       poi-ooxml-schemas-3.9.jar

最后 JeeSite只能导入导出单表   如果 想导入多表 数据 可能  需要 自己 定义一个   VO实体 类

博主 本人 没有 亲自 试过