数据的导出是我们很常见的一个功能,实现起来也不复杂
我们先把poi的jar包导入,在pom.xml里
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.13</version>
</dependency>
然后我们把要导出的实体类写出来
public class ExcelBins {
private String binsId;
private String ording;
private String phone;
private String message;
private String money;
public ExcelBins(){}
public ExcelBins(String binsId, String ording, String phone, String message, String money) {
super();
this.binsId = binsId;
this.ording = ording;
this.phone = phone;
this.message = message;
this.money = money;
}
public String getBinsId() {
return binsId;
}
public void setBinsId(String binsId) {
this.binsId = binsId;
}
public String getOrding() {
return ording;
}
public void setOrding(String ording) {
this.ording = ording;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public String getMoney() {
return money;
}
public void setMoney(String money) {
this.money = money;
}
@Override
public String toString() {
return binsId + "," + ording + "," + phone + "," + message+ "," + money ;
}
}
然后把导出的excel工具类写好
import java.io.BufferedInputStream;
import java.io.FileInputStream;
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.InvocationTargetException;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.swing.JOptionPane;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFClientAnchor;
import org.apache.poi.hssf.usermodel.HSSFComment;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPatriarch;
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.HSSFColor;
import com.yunyunsport.entity.ExcelOrder;
/**
* 利用开源组件POI3.0.2动态导出EXCEL文档 转载时请保留以下信息,注明出处!
*
* @author leno
* @version v1.0
* @param <T>
* 应用泛型,代表任意一个符合javabean风格的类
* 注意这里为了简单起见,boolean型的属性xxx的get器方式为getXxx(),而不是isXxx()
* byte[]表jpg格式的图片数据
*/
public class ExportExcel<T> {
public void exportExcel(Collection<T> dataset, OutputStream out) {
exportExcel("测试POI导出EXCEL文档", null, dataset, out, "yyyy-MM-dd");
}
public void exportExcel(String[] headers, Collection<T> dataset,
OutputStream out) {
exportExcel("测试POI导出EXCEL文档", headers, dataset, out, "yyyy-MM-dd");
}
public void exportExcel(String[] headers, Collection<T> dataset,
OutputStream out, String pattern) {
exportExcel("测试POI导出EXCEL文档", headers, dataset, out, pattern);
}
/**
* 这是一个通用的方法,利用了JAVA的反射机制,可以将放置在JAVA集合中并且符号一定条件的数据以EXCEL 的形式输出到指定IO设备上
*
* @param title
* 表格标题名
* @param headers
* 表格属性列名数组
* @param dataset
* 需要显示的数据集合,集合中一定要放置符合javabean风格的类的对象。此方法支持的
* javabean属性的数据类型有基本数据类型及String,Date,byte[](图片数据)
* @param out
* 与输出设备关联的流对象,可以将EXCEL文档导出到本地文件或者网络中
* @param pattern
* 如果有时间数据,设定输出格式。默认为"yyy-MM-dd"
*/
@SuppressWarnings("unchecked")
public void exportExcel(String title, String[] headers,
Collection<T> dataset, OutputStream out, String pattern) {
// 声明一个工作薄
HSSFWorkbook workbook = new HSSFWorkbook();
// 生成一个表格
HSSFSheet sheet = workbook.createSheet(title);
// 设置表格默认列宽度为15个字节
sheet.setDefaultColumnWidth((short) 15);
// 生成一个样式
HSSFCellStyle style = workbook.createCellStyle();
// 设置这些样式
style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
// 生成一个字体
HSSFFont font = workbook.createFont();
font.setColor(HSSFColor.VIOLET.index);
font.setFontHeightInPoints((short) 12);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
// 把字体应用到当前的样式
style.setFont(font);
// 生成并设置另一个样式
HSSFCellStyle style2 = workbook.createCellStyle();
style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
// 生成另一个字体
HSSFFont font2 = workbook.createFont();
font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
// 把字体应用到当前的样式
style2.setFont(font2);
// 声明一个画图的顶级管理器
HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
// 定义注释的大小和位置,详见文档
HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0,
0, 0, 0, (short) 4, 2, (short) 6, 5));
// 设置注释内容
comment.setString(new HSSFRichTextString("可以在POI中添加注释!"));
// 设置注释作者,当鼠标移动到单元格上是可以在状态栏中看到该内容.
comment.setAuthor("leno");
// 产生表格标题行
HSSFRow row = sheet.createRow(0);
for (short i = 0; i < headers.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style);
HSSFRichTextString text = new HSSFRichTextString(headers[i]);
cell.setCellValue(text);
}
// 遍历集合数据,产生数据行
Iterator<T> it = dataset.iterator();
int index = 0;
while (it.hasNext()) {
index++;
row = sheet.createRow(index);
T t = (T) it.next();
// 利用反射,根据javabean属性的先后顺序,动态调用getXxx()方法得到属性值
Field[] fields = t.getClass().getDeclaredFields();
for (short i = 0; i < fields.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style2);
Field field = fields[i];
String fieldName = field.getName();
String getMethodName = "get"
+ fieldName.substring(0, 1).toUpperCase()
+ fieldName.substring(1);
try {
Class tCls = t.getClass();
Method getMethod = tCls.getMethod(getMethodName,
new Class[] {});
Object value = getMethod.invoke(t, new Object[] {});
// 判断值的类型后进行强制类型转换
String textValue = null;
// if (value instanceof Integer) {
// int intValue = (Integer) value;
// cell.setCellValue(intValue);
// } else if (value instanceof Float) {
// float fValue = (Float) value;
// textValue = new HSSFRichTextString(
// String.valueOf(fValue));
// cell.setCellValue(textValue);
// } else if (value instanceof Double) {
// double dValue = (Double) value;
// textValue = new HSSFRichTextString(
// String.valueOf(dValue));
// cell.setCellValue(textValue);
// } else if (value instanceof Long) {
// long longValue = (Long) value;
// cell.setCellValue(longValue);
// }
if (value instanceof Boolean) {
boolean bValue = (Boolean) value;
textValue = "男";
if (!bValue) {
textValue = "女";
}
} else if (value instanceof Date) {
Date date = (Date) value;
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
textValue = sdf.format(date);
} else if (value instanceof byte[]) {
// 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));
// sheet.autoSizeColumn(i);
byte[] bsValue = (byte[]) value;
HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0,
1023, 255, (short) 6, index, (short) 6, index);
anchor.setAnchorType(2);
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
textValue = value.toString();
}
// 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) {
Pattern p = Pattern.compile("^//d+(//.//d+)?$");
Matcher matcher = p.matcher(textValue);
if (matcher.matches()) {
// 是数字当作double处理
cell.setCellValue(Double.parseDouble(textValue));
} else {
HSSFRichTextString richString = new HSSFRichTextString(
textValue);
HSSFFont font3 = workbook.createFont();
font3.setColor(HSSFColor.BLUE.index);
richString.applyFont(font3);
cell.setCellValue(richString);
}
}
} catch (SecurityException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} finally {
// 清理资源
}
}
}
try {
workbook.write(out);
} catch (IOException e) {
e.printStackTrace();
}
}
}
然后在Controller里面绑定数据
@RequestMapping(value = "download_customer.do")
@ResponseBody
public JsonResult<String> rechargeExcel(HttpServletRequest request, HttpServletResponse response, String gym_id,String type) {
try {
if (type.equals("orders")) {
List<Map<String, Object>> res = orderService.allOrderInfo(gym_id);
List<ExcelBins> binsList = new ArrayList<ExcelBins>();
if(res.size()==0){
return new JsonResult<String>(1, "暂无数据!", "");
}else{
for (Map<String, Object> map2 : res) {
String str1 = map2.values() + "";
String res1[] = str1.split(",");
ExcelBins excelBins = new ExcelBins();
excelBins.setBinsId(res1[3].replace("[[", ""));
excelBins.setMoney(res1[1].replace("[", ""));
excelBins.setPhone(res1[2].replace("[", ""));
String message = res1[4].replace("]", "");
String message1 = message.substring(0, message.length()-3)+":00";
String message2 = message1.replace("_", ":00 - ");
String message3 = message2.replaceAll("h", "");
excelBins.setMessage(message3.replaceAll("\\+", " "));
String ording = res1[0].replace("[", "");
excelBins.setOrding(ording.replace(".0", ""));
binsList.add(excelBins);
}
ExportExcel<ExcelBins> ex = new ExportExcel<ExcelBins>();
String headers[] = { "订单号", "下单时间", "预留手机", "场次信息", "金额" };
String filepath="/home/wycg/tomcat/excel/"+gym_id+type+".xls";
//
File file = new File(filepath);
if (!file.getParentFile().exists()) {
file.getParentFile().mkdirs();
}
try {
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
OutputStream out = new FileOutputStream(file);
ex.exportExcel("订单详情", headers, binsList, out, "yyyy-MM-dd");
out.close();
return new JsonResult<String>(0, "", "https://sport.com/excel/"+gym_id+type+".xls");
}
} else {
List<Map<String, Object>> res = fieldService.exportOrderHistory(gym_id);
List<ExcelOrder> list1 = new ArrayList<ExcelOrder>();
if(res.size()==0){
return new JsonResult<String>(1, "暂无账单!", "");
}else{
for (Map<String, Object> map2 : res) {
String str1 = map2.values() + "";
String res1[] = str1.split(",");
ExcelOrder excelOrder = new ExcelOrder();
excelOrder.setDate(res1[0].replace("[", ""));
excelOrder.setReservegym(res1[1]);
excelOrder.setTotal(res1[2].replace("]", ""));
list1.add(excelOrder);
}
try {
ExportExcel<ExcelOrder> ex = new ExportExcel<ExcelOrder>();
String headers[] = { "日期", "预定场次(次)", "销售总额(元)" };
String filepath="/home/tomcat/webapps/excel/"+gym_id+type+".xls";
//
File file = new File(filepath);
if (!file.getParentFile().exists()) {
file.getParentFile().mkdirs();
}
try {
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
OutputStream out = new FileOutputStream(file);
ex.exportExcel(headers, list1, out);
out.close();
} catch (Exception e) {
e.printStackTrace();
}
return new JsonResult<String>(0, "", "https://sport.com/excel/"+gym_id+type+".xls");
//
}
}
} catch (Exception e) {
e.printStackTrace();
}
return new JsonResult<String>(0, "", "https://sport.com/excel/"+gym_id+type+".xls");
//
}
我们先是将文件下载到服务器,然后客户端下载服务器上的文件,所以我们的存放路径,需要是项目在tomcat部署下的存放路径,需要在网络上能访问得到的,所以这里需要小心一点,然后其他的就可以直接复制了