Java使用Apache POI导出-注意前端不要使用Ajax异步请求

Java使用Apache POI导出-注意前端不要使用Ajax异步请求，如果你想弹出文件下载框，请勿使用异步下载。

Apahce POI pom配置

<!--EXCEL导入导出 -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.9</version>
</dependency>

<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.9</version>
</dependency>

<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml-schemas</artifactId>
<version>3.9</version>
</dependency>

ExoportExcelUtil

package com.boonya.common.utils.excel;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletResponse;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFRichTextString;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import com.cvnavi.common.utils.DateUtil;

@SuppressWarnings("deprecation")
public class ExportExcelUtil {

public static String getFileName() {
return DateUtil.toString(new Date(), "yyyyMMdd-HHmmss");
}

public static XSSFWorkbook getWorkbook(List<?> resultList, String[] showName, String[] resourceField,
Class<?> resultObj, Map<String, Map<String, String>> formatMap) throws SecurityException,
NoSuchMethodException, IllegalArgumentException, IllegalAccessException, InvocationTargetException {
XSSFWorkbook workbook = new XSSFWorkbook();
XSSFSheet sheet = workbook.createSheet("sheet1");
sheet.setDefaultColumnWidth((short) 20);
XSSFCellStyle centerStyle = workbook.createCellStyle();// 设置为水平居中
centerStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER);
centerStyle.setVerticalAlignment(XSSFCellStyle.VERTICAL_CENTER);
XSSFRow row;
XSSFCell cell;
createTitle(showName, sheet);
// 下面是输出各行的数据 下面是输出各行的数据 下面是输出各行的
for (int i = 0, len = resultList.size(); i < len; i++) {
Object result = resultList.get(i);
row = sheet.createRow(i + 1);
// 创建第 i+1 行
for (int j = 0; j < resourceField.length; j++) {
cell = row.createCell(j);// 创建第 j 列
Method method;
method = resultObj.getMethod(resourceField[j]);
// 这里用到了反射机制，通 这里用到了反射机制， 这里用到了反射机制 过方法名来取得对应方法返回的结果对象
Object obj = method.invoke(result);
if (obj != null) {
if (formatMap != null && formatMap.containsKey(resourceField)) {
cell.setCellValue(formatMap.get(resourceField).get(obj.toString()));
} else {
cell.setCellValue(obj.toString());
}
}
}
}
return workbook;
}

/**
*
* @Title: getWorkbook2 @Description: TODO(创建HSSFWorkbook) @param
* resultList @param showName @param resourceField @param resultObj @param
* formatMap @return @throws SecurityException @throws
* NoSuchMethodException @throws IllegalArgumentException @throws
* IllegalAccessException @throws InvocationTargetException 设定文件 @return
* HSSFWorkbook 返回类型 @author: pengjl @date 2017年6月27日 下午3:22:51 @throws
*/
public static HSSFWorkbook getWorkbook2(List<?> resultList, String[] showName, String[] resourceField,
Class<?> resultObj, Map<String, Map<String, String>> formatMap) throws SecurityException,
NoSuchMethodException, IllegalArgumentException, IllegalAccessException, InvocationTargetException {
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.createSheet("sheet1");
sheet.setDefaultColumnWidth((short) 20);
HSSFCellStyle centerStyle = workbook.createCellStyle();// 设置为水平居中
centerStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
centerStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
HSSFRow row;
HSSFCell cell;
createTitle2(showName, sheet);
// 下面是输出各行的数据 下面是输出各行的数据 下面是输出各行的
for (int i = 0; i < resultList.size(); i++) {
Object result = resultList.get(i);
row = sheet.createRow(i + 1);
// 创建第 i+1 行
for (int j = 0; j < resourceField.length; j++) {
cell = row.createCell(j);// 创建第 j 列
Method method;
method = resultObj.getMethod(resourceField[j]);
// 这里用到了反射机制，通 这里用到了反射机制， 这里用到了反射机制 过方法名来取得对应方法返回的结果对象
Object obj = method.invoke(result);
if (obj != null) {
if (formatMap != null && formatMap.containsKey(resourceField)) {
cell.setCellValue(formatMap.get(resourceField).get(obj.toString()));
} else {
cell.setCellValue(obj.toString());
}
}
}
}
return workbook;
}

/**
* @Title: createTitle2 @Description: TODO(多行表头) @param showName @param
* sheet 设定文件 @return void 返回类型 @author: pengjl @date 2017年6月27日
* 下午3:23:30 @throws
*/
private static void createTitle2(String[] showName, HSSFSheet sheet) {
HSSFRow row = sheet.createRow(0); // 创建第 1 行，也就是输出表头 创建第
HSSFCell cell;
for (int i = 0; i < showName.length; i++) {
cell = row.createCell(i);
// 创建第 i 列 创建第
cell.setCellValue(new HSSFRichTextString(showName[i]));
}
}

private static void createTitle(String[] showName, XSSFSheet sheet) {
XSSFRow row = sheet.createRow(0); // 创建第 1 行，也就是输出表头 创建第
XSSFCell cell;
for (int i = 0; i < showName.length; i++) {
cell = row.createCell(i);
// 创建第 i 列 创建第
cell.setCellValue(new XSSFRichTextString(showName[i]));
}
}

/**
* @Title: createWorkbook @Description: TODO(创建HSSFWorkbook) @param
* resultList @param showName @return 设定文件 @return HSSFWorkbook
* 返回类型 @author: pengjl @date 2017年6月27日 下午3:23:41 @throws
*/
public static HSSFWorkbook createWorkbook(List<List<Cell>> resultList, String[] showName) {
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.createSheet("sheet1");
HSSFCellStyle centerStyle = workbook.createCellStyle();// 设置为水平居中
centerStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
centerStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
createTitle2(showName, sheet);
HSSFRow row = null;
HSSFCell cell = null;
int[][] arraSort;
if (resultList.size() == 0) {
arraSort = new int[0][0];
} else {
arraSort = new int[resultList.get(0).size()][resultList.size()];
}
for (int i = 0; i < resultList.size(); i++) {
row = sheet.createRow(i + 1);
// sheet.setColumnWidth(i + 1, 15);
List<Cell> cellList = resultList.get(i);
for (int j = 0; j < cellList.size(); j++) {
cell = row.createCell(j);// 创建第 j 列
cell.setCellValue(cellList.get(j).getValue());
int b = cell.getStringCellValue().getBytes().length;
arraSort[j][i] = b;
if (cellList.get(j).getStyle() != null) {
cell.setCellStyle(cellList.get(j).getStyle());
}
}
}
// 列的最大列宽值（不包括标题）
int widthInfo[] = TwoMaxInfo(arraSort);
// 与标题在比较列宽
for (int i = 0; i < showName.length; i++) {
// sheet.autoSizeColumn(i);
// 算出列（包括标题的最大列宽）
int maxWidthInfo = showName[i].getBytes().length > widthInfo[i] ? showName[i].getBytes().length
: widthInfo[i];
sheet.setColumnWidth(i, maxWidthInfo * 256);
}
return workbook;
}

public static int[] TwoMaxInfo(int[][] arraSort) {
int[] arraySortInfo = null;
arraySortInfo = new int[arraSort.length];
int count = 0;
for (int[] is : arraSort) {
int[] arraInfo = is;
Arrays.sort(arraInfo);
arraySortInfo[count] = arraInfo[arraInfo.length - 1];
count++;
}
return arraySortInfo;
}

/**
* @Title: createWorkbookAll @Description: TODO(创建HSSFWorkbook) @param
* vMap @param showName @return 设定文件 @return HSSFWorkbook 返回类型 @author:
* pengjl @date 2017年6月27日 下午3:20:04 @throws
*/
public static HSSFWorkbook createWorkbookAll(Map<String, List<List<Cell>>> vMap, String[] showName) {
HSSFWorkbook workbook = new HSSFWorkbook();
for (Map.Entry<String, List<List<Cell>>> entry : vMap.entrySet()) {
HSSFSheet sheet = workbook.createSheet(entry.getKey());
sheet.setDefaultColumnWidth((short) 15);
HSSFCellStyle centerStyle = workbook.createCellStyle();// 设置为水平居中
centerStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
centerStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
createTitle2(showName, sheet);
HSSFRow row;
HSSFCell cell;
for (int i = 0; i < entry.getValue().size(); i++) {
row = sheet.createRow(i + 1);
List<Cell> cellList = entry.getValue().get(i);
for (int j = 0; j < cellList.size(); j++) {
cell = row.createCell(j);// 创建第 j 列
cell.setCellValue(cellList.get(j).getValue());
if (cellList.get(j).getStyle() != null) {
cell.setCellStyle(cellList.get(j).getStyle());
}
}
}
for (int i = 0; i < showName.length; i++) {
sheet.autoSizeColumn(i);
}
}
return workbook;
}

/**
* @Title: workbook2InputStream @Description: TODO(导出Excel文件) @param
* workbook @param fileName @param response @return @throws Exception
* 设定文件 @return InputStream 返回类型 @author: pengjl @date 2017年6月27日
* 下午3:20:21 @throws
*/
public static InputStream workbook2InputStream(HSSFWorkbook workbook, String fileName, HttpServletResponse response)
throws Exception {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
workbook.write(baos);
baos.flush();
byte[] aa = baos.toByteArray();
InputStream excelStream = new ByteArrayInputStream(aa, 0, aa.length);
response.setContentType("application/vnd.ms-excel;charset=UTF-8");
response.setHeader("Content-Disposition", "attachment;filename=" + fileName + ".xls");
response.getOutputStream().write(aa);
response.setContentLength(aa.length);
response.getOutputStream().flush();
baos.close();
return excelStream;

}

/**
*
* @Title: workbook2InputStream @Description: TODO(导出Excel文件) @param
* workbook @param fileName @param response @return @throws Exception
* 设定文件 @return InputStream 返回类型 @author: pengjl @date 2017年6月27日
* 下午3:20:49 @throws
*/
public static InputStream workbook2InputStream(XSSFWorkbook workbook, String fileName, HttpServletResponse response)
throws Exception {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
workbook.write(baos);
baos.flush();
byte[] aa = baos.toByteArray();
InputStream excelStream = new ByteArrayInputStream(aa, 0, aa.length);
response.setContentType("application/vnd.ms-excel;charset=UTF-8");
response.setHeader("Content-Disposition", "attachment;filename=" + fileName + ".xlsx");
response.getOutputStream().write(aa);
response.setContentLength(aa.length);
response.getOutputStream().flush();
baos.close();
return excelStream;

}

/**
* @Title: createWorkbookVarietyParam @Description:
* TODO(创建HSSFWorkbook) @param resultList @param showName @param
* headerName @return 设定文件 @return HSSFWorkbook 返回类型 @author: pengjl @date
* 2017年6月27日 下午3:21:22 @throws
*/
public static HSSFWorkbook createWorkbookVarietyParam(ArrayList<ArrayList<String>> resultList, String[] showName,
ArrayList<String> headerName) {
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.createSheet("sheet1");
sheet.setDefaultColumnWidth((short) 15);
HSSFCellStyle centerStyle = workbook.createCellStyle();// 设置为水平居中
centerStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
centerStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
/**
* 设置表头的样式
*/
HSSFCellStyle titylStyle = workbook.createCellStyle();
createTitleVariety(showName, headerName, sheet, titylStyle);
HSSFRow row;
HSSFCell cell;
if (resultList != null && resultList.size() > 0) {
for (int i = 0; i < resultList.size(); i++) {
ArrayList<String> rowResultList = resultList.get(i);
if (headerName != null && headerName.size() > 0) {
row = sheet.createRow((short) (i + 1 + headerName.size()));
} else {
row = sheet.createRow((short) (i + 1));
}
if (rowResultList != null && rowResultList.size() > 0) {

for (int n = 0; n <= rowResultList.size(); n++) {
cell = row.createCell(n);// 创建第 j 列
cell.setCellStyle(centerStyle);
if (n == 0) {
// 为Excel表的第一列添加编号，表头为：序号；eg:1,2,3,4……
cell.setCellValue(i + 1);
} else if (rowResultList.get(n - 1) != null) {
cell.setCellValue(rowResultList.get(n - 1).toString());
} else {
cell.setCellValue("");
}
}

}
}
}

return workbook;
}

/**
* @Title: createTitleVariety @Description: TODO(多行表头) @param
* showName @param headerName @param sheet @param titylStyle 设定文件 @return
* void 返回类型 @author: pengjl @date 2017年6月27日 下午3:24:24 @throws
*/
private static void createTitleVariety(String[] showName, ArrayList<String> headerName, HSSFSheet sheet,
HSSFCellStyle titylStyle) {
HSSFRow row;
HSSFCell cell;
titylStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
titylStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
if (headerName != null && headerName.size() > 0) {
for (int i = 0; i < headerName.size(); i++) {
row = sheet.createRow((short) i);
if (i == 0) {
cell = row.createCell(i);
sheet.addMergedRegion(new CellRangeAddress(i, i, (short) 0, (short) showName.length));
cell.setCellStyle(titylStyle);
if (headerName.get(i) != null) {
cell.setCellValue(new HSSFRichTextString(headerName.get(i).toString()));
} else {
cell.setCellValue(new HSSFRichTextString(""));
}
} else {
cell = row.createCell(i - 1);
sheet.addMergedRegion(new CellRangeAddress(i, i, (short) 0, (short) showName.length));
if (headerName.get(i) != null) {
cell.setCellValue(new HSSFRichTextString(headerName.get(i).toString()));
} else {
cell.setCellValue(new HSSFRichTextString(""));
}
}
}
}
// 设置Excel字段
if (headerName != null && headerName.size() > 0) {
row = sheet.createRow((short) headerName.size());
} else {
row = sheet.createRow(0);
}
for (int n = 0; n <= showName.length; n++) {
if (n == 0) {
cell = row.createCell(n);
cell.setCellStyle(titylStyle);
cell.setCellValue(new HSSFRichTextString("序号"));
} else {
cell = row.createCell(n);
cell.setCellStyle(titylStyle);
cell.setCellValue(new HSSFRichTextString(showName[n - 1]));
}
}
}
}

使用方式

/**
* @Title: export
* @Description: TODO(单车导出&&导出前端Ajax请求不会弹出下载文件)
* @param request
* @param response
* @param temperatureBean
* @return 设定文件
* @return String 返回类型
* @author: pengjl
* @date 2017年6月22日 下午8:38:43
* @throws
*/
@RequestMapping("/export")
public void export(HttpServletRequest request,HttpServletResponse response,TemperatureBean temperatureBean){
int mapType = Integer.parseInt(request.getParameter("mapType"));
try {
List<TemperatureView> viewList= iTemperatureService.queryTrack(temperatureBean, mapType,true);
String[] showName = {"车牌号","GPS时间","速度(公里/时)","海拔(米)","位置","温度"};
List<List<Cell>> dataList = new ArrayList<List<Cell>>();
List<Cell> cellList = new ArrayList<Cell>();
if(viewList.size()>0){
for (TemperatureView view : viewList) {
cellList = new ArrayList<Cell>();
cellList.add(new Cell(view.getTemperatureList().get(0).getPlateCode()));
cellList.add(new Cell(view.getGpsTime()));
cellList.add(new Cell(Double.parseDouble(view.getTemperatureList().get(0).getSpeed()+"")/10 + ""));
cellList.add(new Cell(view.getTemperatureList().get(0).getHigh()+""));
cellList.add(new Cell(view.getTemperatureList().get(0).getLocation()));
String temp = "" ;
for(TemperatureBean bean: view.getTemperatureList()){
temp += bean.getAppendName()+":" + bean.getTemperature() + bean.getUnit() + "," ;
}
if(!temp.equals(""))
temp = temp.substring(0,temp.length()-1);
cellList.add(new Cell(temp));
dataList.add(cellList);
}
}
String fileName = ExportExcel.getFileName();
ExportExcel.workbook2InputStream(ExportExcel.createWorkbook(dataList, showName), fileName,response);
} catch (Exception e) {
e.printStackTrace();
}
}

测试URL

在浏览器中输入导出地址：http://127.0.0.1:8081/cvnavi-monitoryt/temperature/export.do?tokenStr=A2E4CE20DBC8A4EDAC0EC5B2AD25D022&startTime=2017-06-27%2000:00:00&endTime=2017-06-27%2023:59:59&plateCode=%E6%B2%AAAWG102&mapType=2&vehicleId=4427355843467897



通过直接访问可以下载，故推测前端反映的无法导出是因为其使用了Ajax，文件本身是异步方式，所以浏览器不会弹出下载框。