Easyui DataGrid Spring mvc poi 数据导出Excel，具体代码：
1、html:
<div class="btnbar-tools">
<a href="javascript:void(0);" class="count" id="exportHnStatics"><i class="fa fa-pie-chart purple"></i>导出</a>
</div>
2、JS实现，(用Ajax无法导出)
$(document).ready(function(){
//导出
$('#exportHnStatics').on('click', function(){
var mouth=$('#st_mouth').val();
//查询参数
param = "?mouth="+mouth;
window.location.href = basePath+"/api/exportHnStatics"+param;
});
});
3、后台pom.xml依赖添加：
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.10</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.17</version>
</dependency>
<dependency>
<groupId>org.apache.directory.studio</groupId>
<artifactId>org.apache.commons.io</artifactId>
<version>2.4</version>
</dependency>
4、后台Controller实现：
@RequestMapping(value = "/exportHnStatics")
@ResponseBody
public void exportHnStatics(HttpServletResponse response, HttpServletRequest request, String mouth) {
List<Map> listData = this.dataLogService.selectLoginStatistics(params);
//listData格式如下：
//Map map = new HashMap<>();
//map.put("date", "2018-09-27");
//map.put("bjTotal", "100");
//map.put("tjTotal", "200");
//map.put("shTotal", "300");
//List<Map> list = new ArrayList<>();
//list.add(map);
String columnNames[] = { "日期", "北京", "天津", "上海"};// 列名
String keys[] = { "date", "bjTotal", "tjTotal", "shTotal"};// map中的key
String fileName = "test";
//导出
Map<Short, HorizontalAlignment> styleMap = new HashMap<Short, HorizontalAlignment>();
//可以设置列样式，靠左靠右
styleMap.put(new Short("1"), HorizontalAlignment.LEFT);
//调用导出，数据内容为List<Map>格式
ExportExcelUtils.exportExcel(listData, keys, columnNames, response, fileName, styleMap, request);
}
5、导出ExportExcelUtils工具类封装：
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.io.output.ByteArrayOutputStream;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.BorderStyle;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
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.xssf.streaming.SXSSFWorkbook;
/**
* @ClassName: ExportExcelUtils
* @Description: 导出Excel文件
* @author sam
* @date 2017年6月23日 上午9:45:03
*/
public class ExportExcelUtils {
/**
* @Description: 创建工作簿导出
* @param list 导出数据集合
* @param keys 表头数组集合
* @param columnNames 导出excel里面的列名属性
* @param styleMap 样式列表[可以使用默认样式]
* @return
*/
@SuppressWarnings("rawtypes")
public static Workbook createWorkbook(List<Map> list, String[] keys,
String[] columnNames,Map<Short, HorizontalAlignment> styleMap) {
// 创建excel工作簿
SXSSFWorkbook wb = new SXSSFWorkbook(1000);
// 创建第一个sheet（页），并命名
Sheet sheet = null;
// 创建两种单元格格式
CellStyle cs = wb.createCellStyle();
CellStyle cs2 = wb.createCellStyle();
// 创建两种字体
Font f = wb.createFont();
Font f2 = wb.createFont();
// 创建第一种字体样式（用于列名）
f.setFontHeightInPoints((short) 10);
f.setColor(IndexedColors.BLACK.getIndex());
f.setBold(true);
// 创建第二种字体样式（用于值）
f2.setFontHeightInPoints((short) 10);
f2.setColor(IndexedColors.BLACK.getIndex());
// 设置第一种单元格的样式（用于列名）
cs.setFont(f);
cs.setBorderLeft(BorderStyle.THIN);
cs.setBorderRight(BorderStyle.THIN);
cs.setBorderTop(BorderStyle.THIN);
cs.setBorderBottom(BorderStyle.THIN);
cs.setAlignment(HorizontalAlignment.CENTER);
// 设置第二种单元格的样式（用于值）
cs2.setFont(f2);
cs2.setBorderLeft(BorderStyle.THIN);
cs2.setBorderRight(BorderStyle.THIN);
cs2.setBorderTop(BorderStyle.THIN);
cs2.setBorderBottom(BorderStyle.THIN);
cs2.setAlignment(HorizontalAlignment.CENTER);
int startNum = 0;//sheet开始行
// 设置每行每列的值
for (int i = 0; i < list.size(); i++) {
// Row 行,Cell 方格 , Row 和 Cell 都是从0开始计数的
//超过50000条新建sheet
int num = i%50000;
if(0==num){
startNum = 0;
sheet = wb.createSheet();
// 手动设置列宽。第一个参数表示要为第几列设；，第二个参数表示列的宽度，n为列高的像素数。
for (int k = 0; k < keys.length; k++) {
sheet.setColumnWidth((short) k, (short) (45 * 150));
}
// 创建第一行
Row row = sheet.createRow((short) 0);
// 设置列名
for (int l = 0; l < columnNames.length; l++) {
Cell cell = row.createCell(l);
cell.setCellValue(columnNames[l]);
cell.setCellStyle(cs);
}
}
// 创建一行，在页sheet上
Row row1 = sheet.createRow( startNum + 1);
startNum++;
// 在row行上创建一个方格
for (short j = 0; j < keys.length; j++) {
Cell cell = row1.createCell(j);
cell.setCellValue(list.get(i).get(keys[j]) == null ? " " : list.get(i).get(keys[j]).toString());
//判断是否使用特定样式
if (styleMap!=null && styleMap.containsKey(j)) {
CellStyle csItem = wb.createCellStyle();
csItem.setFont(f2);
csItem.setBorderLeft(BorderStyle.THIN);
csItem.setBorderRight(BorderStyle.THIN);
csItem.setBorderTop(BorderStyle.THIN);
csItem.setBorderBottom(BorderStyle.THIN);
csItem.setAlignment(styleMap.get(j));
cell.setCellStyle(csItem);
}else{
cell.setCellStyle(cs2);
}
}
}
return wb;
}
/**
* @Description: 导出Excel
* @param list 导出数据集合
* @param keys 表头集合
* @param columnNames 列属性集合
* @param styleMap 样式列表[可以使用默认样式]
* @param response response请求对象
* @throws Exception
*/
@SuppressWarnings("rawtypes")
public static void exportExcel(List<Map> list, String keys[], String columnNames[], HttpServletResponse response,
String fileName,Map<Short, HorizontalAlignment> styleMap,HttpServletRequest request) throws Exception {
ByteArrayOutputStream os = new ByteArrayOutputStream();
// 调用工具类创建excel工作簿
if(list==null || list.size()==0){
createEmptyWorkbook(columnNames).write(os);
} else {
createWorkbook(list, keys, columnNames,styleMap).write(os);
}
byte[] content = os.toByteArray();
InputStream is = new ByteArrayInputStream(content);
// 设置response参数，可以打开下载页面
response.reset();
fileName = getDownloadFileName(fileName+".xlsx",request);
response.setContentType("application/vnd.ms-excel;charset=utf-8");
response.setHeader("Content-Disposition",
"attachment;filename=" + fileName);
OutputStream out = response.getOutputStream();
byte[] b = new byte[2048];
int length;
while ((length = is.read(b)) > 0) {
out.write(b, 0, length);
}
// 关闭。
os.flush();
os.close();
is.close();
}
/**
* @Description: List数据案例
* @return
*/
public static List<Map> getData() {
String keys[] = { "companyName", "companyUserCount", "userCount", "notLoginCount", "useCount", "userPercent" };// map中的key
Map map = new HashMap<>();
map.put("companyName", 1);
map.put("companyUserCount", "aaa");
map.put("userCount", "北京");
map.put("notLoginCount", "aaa");
map.put("useCount", "北京");
map.put("userPercent", "aaa");
Map map2 = new HashMap<>();
map2.put("companyName", 2);
map2.put("companyUserCount", "bbb");
map2.put("userCount", "武汉");
map2.put("notLoginCount", "bbb");
map2.put("useCount", "武汉");
map2.put("userPercent", "bbb");
List<Map> list = new ArrayList<>();
list.add(map);
list.add(map2);
return list;
}
public static String getDownloadFileName(String fileName,HttpServletRequest request) {
String finalFileName = null;
try {
String userAgent = request.getHeader("USER-AGENT");
if(StringUtils.contains(userAgent, "MSIE")||StringUtils.contains(userAgent, "Edge")||StringUtils.contains(userAgent, "like Gecko")){//IE浏览器
finalFileName = URLEncoder.encode(fileName,"UTF8");
}else if(StringUtils.contains(userAgent, "Mozilla")){//google,火狐浏览器
finalFileName = new String(fileName.getBytes(), "ISO8859-1");
}else{
finalFileName = URLEncoder.encode(fileName,"UTF8");//其他浏览器
}
} catch (Exception e) {
}
return finalFileName;
}
public static Workbook createEmptyWorkbook(String[] columnNames){
// 创建excel工作簿
SXSSFWorkbook wb = new SXSSFWorkbook(1000);
// 创建第一个sheet（页），并命名
Sheet sheet = null;
// 创建两种单元格格式
CellStyle cs = wb.createCellStyle();
// 创建两种字体
Font f = wb.createFont();
// 创建第一种字体样式（用于列名）
f.setFontHeightInPoints((short) 10);
f.setColor(IndexedColors.BLACK.getIndex());
f.setBold(true);
cs.setFont(f);
cs.setBorderLeft(BorderStyle.THIN);
cs.setBorderRight(BorderStyle.THIN);
cs.setBorderTop(BorderStyle.THIN);
cs.setBorderBottom(BorderStyle.THIN);
cs.setAlignment(HorizontalAlignment.CENTER);
sheet = wb.createSheet();
// 手动设置列宽。第一个参数表示要为第几列设；，第二个参数表示列的宽度，n为列高的像素数。
for (int k = 0; k < columnNames.length; k++) {
sheet.setColumnWidth((short) k, (short) (45 * 150));
}
// 创建第一行
Row row = sheet.createRow((short) 0);
// 设置列名
for (int l = 0; l < columnNames.length; l++) {
Cell cell = row.createCell(l);
cell.setCellValue(columnNames[l]);
cell.setCellStyle(cs);
}
Row row2 = sheet.createRow(1);
Cell cell = row2.createCell(0);
cell.setCellValue("未查询到符合条件的数据");
return wb;
}
}
配置完成！