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java实现excel的导入导出(poi)_java excel导入导出 pio

java excel导入导出 pio

java实现excel的导入导出(poi)

首先我们要知道MS excel文件由什么组成,比如说sheet(一个工作表格),表格的行,单元格,单元格格式,单元格内容格式…这些都对应着poi里面的一个类。

一个excel表格:HSSFWorkbook wb =newHSSFWorkbook();


或者 XSSFWorkbook wb =newXSSFWorkbook();


一个工作表格:HSSFSheet sheet = wb.createSheet("表格");


一行:HSSFRow row= sheet.createRow(0);


一个单元格(cell)HSSFCell cell= row.createCell((short)0)


单元格格式(cellstyle):HSSFCellStyle style= wb.createCellStyle()


单元格内容格式:HSSFDataFormat format= wb.createDataFormat();


读写xls和xlsx不同格式的excel文档时,HSSFWorkbook针对.xls,XSSFWorkbook针对.xlsx的格式。


PS:xlsx是Microsoft Office EXCEL 2007文档的扩展名。xlsx是Office2007使用的,是用新的基于XML的压缩文件格式取代了其目前专有的默认文件格式,在传统的文件名扩展名后面添加了字母x(即:docx取代doc、.xlsx取代xls等等),使其占用空间更小。


一、导入Excel表格

导入.xls格式的excel表格,读取、筛选其中的内容。将正确的内容存入系统中,提示用户错误导入的数目,并提供用户下载导入失败的条目。


@RequiresPermissions("repair:repairItem:edit")
@RequestMapping(value = "importExcel")
public String repairItemInfoInport(MultipartFile repairItemExcel, HttpServletRequest request,RedirectAttributes redirectAttributes,Model model) throws InvalidFormatException, IOException {
CommonsMultipartResolver resolver = new CommonsMultipartResolver(request.getSession().getServletContext());
User user =UserUtils.getUser();

Community community = user.getCommunity();
String communityId = community.getId();
Map result = new HashMap();
List<list> errorExcel=new ArrayList<>();
String Filename = repairItemExcel.getOriginalFilename();
// 判断条件:1.导入Excel文件后缀必须为.xls
if (Filename.contains(".xls")&& resolver.isMultipart(request)&& (StringUtils.isNotBlank(communityId)&& null != repairItemExcel)) {
String[] header = {};
List<list> data = new ArrayList<>();
try {
InputStream is = repairItemExcel.getInputStream();
header = excelReader.readExcelTitle(is);
data = excelReader.readExcelContent(is);
is.close();
} catch (IOException e) {
logger.debug("Import fail");
addMessage(model, "导入失败");
}
if (data.size() != 0 && header != null) {
/*
把表格中的数据写到数据表中
*/
result = repairItemService.txaddExcelRepairItem(data,communityId);
if(result==null||"".equals(result)){
logger.debug("Import fail");
addMessage(model, "导入失败,请检查导入表格的格式是否符合模板中的要求");
return importItem(model);
}
// 创建ImportExcel操作对象ei
ImportExcel ei = null;
try {
ei=new ImportExcel(repairItemExcel, 0, 0);
}catch (Exception e) {
e.printStackTrace();
addMessage(model, "操作失败,请重试!");
}
// 获取导入错误数据
for (Map m : (List<map>) result.get("errorRowList")) {
Integer rowNumber = (Integer) m.get("errorRow");
Row row = ei.getRow(rowNumber);
Listlist = new ArrayList<>();
boolean passFlag = false;
for (int j = 0; j <= ei.getLastCellNum(); j++) {
Object val = ei.getCellValue(row, j);
String s = null;
if (val instanceof Double) {
s = new DecimalFormat("0").format(val);
} else {
s = val.toString();
}
if (s.indexOf("测试") != -1) {
passFlag = true;
break;
}
if (j <= 4 || StringUtils.isNotBlank(s)) {
list.add(s);
}
}
if (passFlag) {
continue;
}
list.add(m.get("message"));
errorExcel.add(list);
}
// 写出导入错误的数据excel
this.errorData=errorExcel;

// 成功条数
Integer successNumber = (Integer) result.get("successNumber");
// 失败条数
Integer errorNumber = (Integer) result.get("errorNumber");
if (errorNumber == null || errorNumber == 0) {
addMessage(redirectAttributes, "成功导入所有");
} else {
addMessage(redirectAttributes, "成功导入" + successNumber + "条," + errorNumber + "条导入失败!");
}
}
}else{
addMessage(model, "导入失败,请选择.xls文件");
return importItem(model);
}
return "redirect:"+Global.getAdminPath()+"/repair/repairItem/?repage";
}
/**
* 导出错误的excel
*
* @param response
*/
@RequestMapping("exportError")
public void exportError(HttpServletResponse response) {
// 写出错误记录excel
if (errorData != null && !errorData.isEmpty()) {
String[] headers = {"类型","名称", "单价(元)", "单位", "备注","错误信息"};
try {
WriteExcelUtil.writeExcel(response, "错误记录", headers, errorData);
errorData.removeAll(errorData);
errorData.clear();
} catch (IOException e) {
e.printStackTrace();
}
}
}

操作Excel表格的功能类 ExcelReader.java


import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import java.io.IOException;
import java.io.InputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
/**
* 操作Excel表格的功能类
*/
public class ExcelReader {
private POIFSFileSystem fs;
private HSSFWorkbook wb;
private HSSFSheet sheet;
private HSSFRow row;
/**
* 读取Excel表格表头的内容
* @param
* @return String 表头内容的数组
*/
public String[] readExcelTitle(InputStream is) {
try {
fs = new POIFSFileSystem(is);
//is.close();
wb = new HSSFWorkbook(fs);
} catch (IOException e) {
e.printStackTrace();
}
sheet = wb.getSheetAt(0);
row = sheet.getRow(0);
// 标题总列数
int colNum = row.getPhysicalNumberOfCells();
/*System.out.println("colNum:" + colNum);*/
String[] title = new String[colNum];
int i;
for ( i = 0; i < colNum; i++) {
//title[i] = getStringCellValue(row.getCell((short) i));
title[i] = getCellFormatValue(row.getCell((short) i));
}
return title;
}
/**
* 读取Excel数据内容
* @param
* @return Map 包含单元格数据内容的Map对象
*/
/*public List readExcelContent(InputStream is) {
List content = new ArrayList<>();
String str = "";
try {
fs = new POIFSFileSystem(is);
wb = new HSSFWorkbook(fs);
} catch (IOException e) {
e.printStackTrace();
}
sheet = wb.getSheetAt(0);
// 得到总行数
int rowNum = sheet.getLastRowNum();
row = sheet.getRow(0);
int colNum = row.getPhysicalNumberOfCells();
// 正文内容应该从第二行开始,第一行为表头的标题 for (int i = 1; i <= rowNum; i++) {
String[] temp=new String[colNum];
row = sheet.getRow(i);
int j = 0;
while (j < colNum) {
// 每个单元格的数据内容用"-"分割开,以后需要时用String类的replace()方法还原数据
// 也可以将每个单元格的数据设置到一个javabean的属性中,此时需要新建一个javabean
// str += getStringCellValue(row.getCell((short) j)).trim() +
// "-";
temp[j]=getCellFormatValue(row.getCell( j)).trim();
//temp[j]=str;
j++;
}
content.add(temp);
str = "";
}
return content;
}*/
/**
* 读取Excel数据内容
* @param
* @returnList<list>包含单元格数据内容的List<list>对象
*/
public List<list> readExcelContent(InputStream is) {
/*try {
//fs = new POIFSFileSystem(is);
//is.close();
//wb = new HSSFWorkbook(fs);
} catch (IOException e) {
e.printStackTrace();
}*/
int rowNum = sheet.getLastRowNum();
int colNum = row.getPhysicalNumberOfCells();
// 正文内容应该从第二行开始,第一行为表头的标题
List<list> data = new ArrayList<list>();
Listl;
for (int i = 1; i <= rowNum; i++) {
l = new ArrayList();
row = sheet.getRow(i);
int j = 0;
while (j < colNum) {
// 也可以将每个单元格的数据设置到一个javabean的属性中,此时需要新建一个javabean
//if (getCellFormatValue(row.getCell(j)))
l.add(getStringCellValue(row.getCell(j)).trim());
j++;
}
data.add(l);
}
return data;
}
/**
* 获取单元格数据内容为字符串类型的数据
*
* @param cell Excel单元格
* @return String 单元格数据内容
*/
private String getStringCellValue(HSSFCell cell) {
String strCell = "";
if (cell==null){
return strCell;
}
switch (cell.getCellType()) {
case HSSFCell.CELL_TYPE_STRING:
strCell = cell.getStringCellValue();
break;
case HSSFCell.CELL_TYPE_NUMERIC:
DecimalFormat df = new DecimalFormat("#");
strCell = df.format(cell.getNumericCellValue());
break;
case HSSFCell.CELL_TYPE_BOOLEAN:
strCell = String.valueOf(cell.getBooleanCellValue());
break;
case HSSFCell.CELL_TYPE_BLANK:
strCell = "";
break;
default:
strCell = "";
break;
}
if (strCell.equals("") || strCell == null) {
return "";
}
if (cell == null) {
return "";
}
return strCell;
}
/**
* 获取单元格数据内容为日期类型的数据
*
* @param cell
* Excel单元格
* @return String 单元格数据内容
*/
private String getDateCellValue(HSSFCell cell) {
String result = "";
try {
int cellType = cell.getCellType();
if (cellType == HSSFCell.CELL_TYPE_NUMERIC) {
Date date = cell.getDateCellValue();
result = (date.getYear() + 1900) + "-" + (date.getMonth() + 1)
+ "-" + date.getDate();
} else if (cellType == HSSFCell.CELL_TYPE_STRING) {
String date = getStringCellValue(cell);
result = date.replaceAll("[年月]", "-").replace("日", "").trim();
} else if (cellType == HSSFCell.CELL_TYPE_BLANK) {
result = "";
}
} catch (Exception e) {
System.out.println("日期格式不正确!");
e.printStackTrace();
}
return result;
}
/**
* 根据HSSFCell类型设置数据
* @param cell
* @return
*/
private String getCellFormatValue(HSSFCell cell) {
String cellvalue = "";
if (cell != null) {
// 判断当前Cell的Type
switch (cell.getCellType()) {
// 如果当前Cell的Type为NUMERIC
case HSSFCell.CELL_TYPE_NUMERIC:
case HSSFCell.CELL_TYPE_FORMULA: {
// 判断当前的cell是否为Date
if (HSSFDateUtil.isCellDateFormatted(cell)) {
// 如果是Date类型则,转化为Data格式
//方法1:这样子的data格式是带时分秒的:2011-10-12 0:00:00
//cellvalue = cell.getDateCellValue().toLocaleString();
//方法2:这样子的data格式是不带带时分秒的:2011-10-12
Date date = cell.getDateCellValue();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
cellvalue = sdf.format(date);
}
// 如果是纯数字
else {
// 取得当前Cell的数值
cellvalue = String.valueOf(cell.getNumericCellValue());
}
break;
}
// 如果当前Cell的Type为STRIN
case HSSFCell.CELL_TYPE_STRING:
// 取得当前的Cell字符串
cellvalue = cell.getRichStringCellValue().getString();
break;
// 默认的Cell值
default:
cellvalue = " ";
}
} else {
cellvalue = "";
}
return cellvalue;
}
}

导入Excel文件(支持“XLS”和“XLSX”格式): ImportExcel.java


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.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.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.qwkj.zxl.common.utils.Reflections;
import com.qwkj.zxl.common.utils.excel.annotation.ExcelField;
import com.qwkj.zxl.modules.sys.utils.DictUtils;
/**
* 导入Excel文件(支持“XLS”和“XLSX”格式)
* @author ThinkGem
* @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()<sheetindex){
throw new RuntimeException("文档中没有工作表!");
}
this.sheet = this.wb.getSheetAt(sheetIndex);
this.headerNum = headerNum;
log.debug("Initialize success.");
}

/**
* 获取行对象
* @param rownum
* @return
*/
public Row getRow(int rownum){
return this.sheet.getRow(rownum);
}
/**
* 获取数据行号
* @return
*/
public int getDataRowNum(){
return headerNum+1;
}

/**
* 获取最后一个数据行号
* @return
*/
public int getLastDataRowNum(){
return this.sheet.getLastRowNum()+headerNum;
}

/**
* 获取最后一个列号
* @return
*/
public int getLastCellNum(){
return this.getRow(headerNum).getLastCellNum();
}

/**
* 获取单元格值
* @param row 获取的行
* @param column 获取单元格列号
* @return 单元格值
*/
public Object getCellValue(Row row, int column){
Object val = "";
try{
Cell cell = row.getCell(column);
if (cell != null){
if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC){
val = cell.getNumericCellValue();
}else if (cell.getCellType() == Cell.CELL_TYPE_STRING){
val = cell.getStringCellValue();
}else if (cell.getCellType() == Cell.CELL_TYPE_FORMULA){
val = cell.getCellFormula();
}else if (cell.getCellType() == Cell.CELL_TYPE_BOOLEAN){
val = cell.getBooleanCellValue();
}else if (cell.getCellType() == Cell.CELL_TYPE_ERROR){
val = cell.getErrorCellValue();
}
}
}catch (Exception e) {
return val;
}
return val;
}

/**
* 获取导入数据列表
* @param cls 导入对象类型
* @param groups 导入分组
*/
public List getDataList(Class cls, int... groups) throws InstantiationException, IllegalAccessException{
ListannotationList = 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 {
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){
val = DateUtil.getJavaDate((Double)val);
}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");
// }
//
// }
}二、导出项目中存在的Excel模板
@RequiresPermissions("repair:repairItem:edit")
@RequestMapping(value = "exportExcel")
public void repairItemExportTemplateDown(HttpServletResponse response,HttpSession session){
try {
//读写xls和xlsx格式时,HSSFWorkbook针对xls,XSSFWorkbook针对xlsx
HSSFWorkbook wb = new HSSFWorkbook(new FileInputStream(session.getServletContext().getRealPath("/") + "excel//导入模板.xls"));
//response.setHeader("Content-disposition", "filename= repairItem.xls");
//repairItemService.downRepairItemMould(header, response.getOutputStream());
response.setHeader("Content-Disposition", "attachment;filename=" + new String("导入模板.xls".getBytes(), "ISO-8859-1"));
wb.write(response.getOutputStream());
} catch (IOException e) {
e.printStackTrace();
}
}



三、系统页面中的列表内容以excel表格的形式导出
@RequestMapping("exportPayBillRecord")
public void exportPayBillRecord(PayBillrecord payBillrecord, HttpServletResponse response) {
List PayBillrecordLists = payBillrecordService.findList(payBillrecord);
List<list> data = new ArrayList<list>();
List countList=payBillrecordService.findList(payBillrecord);
//所缴金额总数
BigDecimal countMoney =new BigDecimal("0");
for(int i=0; i<countlist.size();i++){
countMoney=countMoney.add(countList.get(i).getPaymoney());
}
// 制作data
for (PayBillrecord PayBillrecordList : PayBillrecordLists) {
Listlist = new ArrayList();
list.add(PayBillrecordList.getCostBillNo());
list.add(PayBillrecordList.getTradeNo());
list.add(PayBillrecordList.getPayTypeName());
list.add(PayBillrecordList.getPaymoney());
if(PayBillrecordList.getUser()!=null){
list.add(PayBillrecordList.getUser().getUserRealName());
}
else{
list.add("");
}
list.add(PayBillrecordList.getCommunity().getName());
data.add(list);
}
String[] headers = {"缴费单号", "交易单号", "缴费类型", "所缴金额", "缴费方式", "缴费人","所属小区","缴费时间"};
try {
WriteExcelUtil.writeExcel(response, "缴费历史信息统计", headers, data);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 写出普通的excel
*
* @param response HttpServletResponse
* @param fileName 写出文件的文件名,若没有添加文件类型后缀,则默认添加".xls"
* @param headers标题行内容
* @param data 数据行内容(需要和标题行顺序一样,只支持各种普通类型)
*/
public static void writeExcel(HttpServletResponse response, String fileName, String[] headers, List<list> data) throws IOException {
// 基础操作
HSSFWorkbook workbook = baseHandle(headers, data);
// 文件名操作
fileNameHandle(response, fileName);
// 写出excel
workbook.write(response.getOutputStream());
}

导出的实际效果图如下:




还封装了一下写出Excel的工具类: WriteExcelUtil.java


package com.qwkj.zxl.common.utils.excel;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.CellRangeAddressList;
import org.apache.poi.hssf.util.HSSFColor;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Map;
/**
* 2016/3/9
* 写出Excel工具类
*/
public class WriteExcelUtil {
/**
* 写出带有选择框限制的excel
* @param response HttpServletResponse
* @param fileName 写出文件的文件名,若没有添加文件类型后缀,则默认添加".xls"
* @param headers标题行内容
* @param data数据行内容(需要和标题行顺序一样,只支持各种普通类型)
* @param maps需要做选择框限制的列的集合说明:1.map中key为"titleContent"中需存入,需要做选择框的列顶部标题内容2.map中key为"data"中需存入,所能选择的数据集合
* @throws Exception
*/
public static void writeExcelHaveSelectBox(HttpServletResponse response, String fileName, String[] headers, List<list> data, List<map> maps) throws Exception {
if(maps == null || maps.isEmpty()){
throw new RuntimeException("参数maps为空");
}
// 基础操作
HSSFWorkbook workbook = baseHandle(headers, data);
// 文件名操作
fileNameHandle(response, fileName);
// 如果maps里有数据,则生成选择框限制
writeSelectionBox(headers, maps, workbook);
// 写出文件
workbook.write(response.getOutputStream());
}
/**
* 写出普通的excel
*
* @param response HttpServletResponse
* @param fileName 写出文件的文件名,若没有添加文件类型后缀,则默认添加".xls"
* @param headers标题行内容
* @param data 数据行内容(需要和标题行顺序一样,只支持各种普通类型)
*/
public static void writeExcel(HttpServletResponse response, String fileName, String[] headers, List<list> data) throws IOException {
// 基础操作
HSSFWorkbook workbook = baseHandle(headers, data);
// 文件名操作
fileNameHandle(response, fileName);
// 写出excel
workbook.write(response.getOutputStream());
}
/**
* 写出excel的一些基础操作
* @param headers标题行内容
* @param data数据行内容
* @return 返回操作的HSSFWorkbook
* @throws Exception
*/
private static HSSFWorkbook baseHandle(String[] headers, List<list> data) throws IOException {
// 声明一个工作薄
HSSFWorkbook workbook = new HSSFWorkbook();
// 生成一个表格
HSSFSheet sheet = workbook.createSheet();
// 设置表格默认列宽度为20个字节
sheet.setDefaultColumnWidth(20);
// 写入标题行
writeTitleRow(headers, workbook);
// 如果data有数据,则遍历集合数据,产生数据行
if(data != null && !data.isEmpty()){
writeDataRow(data, workbook);
}
// 返回操作的HSSFWorkbook
return workbook;
}
/**
* 文件名操作
* @param response HttpServletResponse
* @param fileName 写出文件的文件名,若没有添加文件类型后缀,则默认添加".xls"
*/
private static void fileNameHandle(HttpServletResponse response, String fileName) throws IOException{
// 如果fileName没有".",说明没有加文件类型后缀,则默认添加".xls"
if (fileName.indexOf(".") == -1) {
fileName += ".xls";
}
// 文件名转码
fileName = new String(fileName.getBytes(), "ISO-8859-1");
// 在请求头中写入文件名
response.setHeader("Content-Disposition", "attachment;filename=" + fileName);
}
/**
* 生成选择框限制
* @param headers 标题行内容(用于确定,有选择框限制的列位置)
* @param maps需要做选择框限制的列的集合说明:1.map中key为"titleContent"中需存入,需要做选择框的列顶部标题内容2.map中key为"data"中需存入,所能选择的数据集合
*/
private static void writeSelectionBox(String[] headers, List<map> maps, HSSFWorkbook workbook) throws Exception{
for(Map map : maps){
// 需要做选择框限制的列的标题内容
String titleContent = map.get("titleContent").toString();
// 能选择的数据
Listlist = (List) map.get("data");
// 所能的数据不能超过50条(经过测试得出,超过50则会报错)
if(list.size() > 50){
throw new RuntimeException("所能选择的选项不能超过50");
}
// 确定有选择框限制的列位置
Integer index = null;
for(int i = 0; i < headers.length; ++i){
if(headers[i].equals(titleContent)){
index = i;
break;
}
}
// 如果确定不了位置,则弹出一个错误
if(index == null){
throw new RuntimeException("寻找不到指定列");
}
// 产生下拉框
DVConstraint constraint1 = DVConstraint.createExplicitListConstraint(list.toArray(new String[list.size()]));
// 设置数据有效性加载在哪个单元格上,四个参数分别是:起始行、终止行、起始列、终止列
CellRangeAddressList regions1 = new CellRangeAddressList(1, 500, 1, 1);
// 数据有效性对象
HSSFDataValidation data_validation_list1 = new HSSFDataValidation(regions1, constraint1);
workbook.getSheetAt(0).addValidationData(data_validation_list1);
}
}
/**
* 写入标题行
* @param headers 标题行内容
* @param workbook HSSFWorkbook
*/
private static void writeTitleRow(String[] headers, HSSFWorkbook workbook){
// 获取表格
HSSFSheet sheet = workbook.getSheetAt(0);
// 生成标题样式
HSSFCellStyle titleStyle = workbook.createCellStyle();
// 设置这些样式
titleStyle.setBottomBorderColor(HSSFColor.SKY_BLUE.index);// 设置用于底部边框的颜色
titleStyle.setFillForegroundColor(HSSFColor.SKY_BLUE.index);// 设置前景色填充颜色注意:保证前颜色设置背景色。
titleStyle.setFillBackgroundColor(HSSFColor.SKY_BLUE.index);// 设置背景填充颜色
titleStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);// 设置为一个充满前景颜色的单元格
titleStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);// 设置单元格的底边框的类型
titleStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);// 设置单元格的左边框的类型
titleStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);// 设置单元格的右边框的类型
titleStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);// 设置单元格的顶边框的类型
titleStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 设置单元格的水平对齐方式
// 生成标题字体
HSSFFont font = workbook.createFont();
font.setColor(HSSFColor.VIOLET.index);// 字体颜色
font.setFontHeightInPoints((short) 12);// 字体高度
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);// 字体粗细
// 把标题字体应用到标题样式
titleStyle.setFont(font);
//产生表格标题行
HSSFRow row = sheet.createRow(0);
for (int i = 0; i < headers.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(titleStyle);
HSSFRichTextString text = new HSSFRichTextString(headers[i]);
cell.setCellValue(text);
}
}
/**
* 写入数据行
* @param data 数据
* @param workbook HSSFWorkbook
*/
private static void writeDataRow(List<list> data, HSSFWorkbook workbook){
// 获取表格
HSSFSheet sheet = workbook.getSheetAt(0);
// 生成并设置内容样式
HSSFCellStyle contentStyle = workbook.createCellStyle();
contentStyle.setFillForegroundColor(HSSFColor.WHITE.index);
contentStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
contentStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
contentStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
contentStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
contentStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
contentStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
contentStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
// 生成内容字体
HSSFFont font2 = workbook.createFont();
font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
// 把字体应用到当前的样式
contentStyle.setFont(font2);
int index = 0;
for (Listlist : data) {
index++;
HSSFRow row = sheet.createRow(index);
for (int i = 0; i < list.size(); i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(contentStyle);
Object value = list.get(i);
String textValue = null;
if (value instanceof Boolean) {
boolean bValue = (Boolean) value;
textValue = "是";
if (!bValue) {
textValue = "否";
}
} else if (value instanceof Date) {
Date date = (Date) value;
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
textValue = sdf.format(date);
} else if (value instanceof byte[]) {
//画图的顶级管理器,一个sheet只能获取一个(一定要注意这点)
HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
// 有图片时,设置行高为60px;
row.setHeightInPoints(60);
// 设置图片所在列宽度为80px,注意这里单位的一个换算
sheet.setColumnWidth(i, (short) (35.7 * 80));
byte[] bsValue = (byte[]) value;
HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 1023, 255, (short) 6, index, (short) 6, index);
anchor.setAnchorType(2);
//插入图片
patriarch.createPicture(anchor, workbook.addPicture(bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
} else {
//其它数据类型都当作字符串简单处理
if (value != null) {
textValue = value.toString();
} else {
textValue = " ";
}
}
//如果不是图片数据,就利用正则表达式判断textValue是否全部由数字组成
if (textValue != null) {
HSSFRichTextString richString = new HSSFRichTextString(textValue);
HSSFFont font3 = workbook.createFont();
richString.applyFont(font3);
cell.setCellValue(richString);
}
}
}
}
}
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