JAVA语言工具类封装-基于poi的excel导出功能

OrderInfoExcelBuilder.getInstance().createExcel(OrderType.MAIN_ORDER, orderInfoDetailList, response);

<pre name="code" class="java">package com.qunar.flight.ib2b.trade.center.util.excel;

import java.io.OutputStream;
import java.net.URLEncoder;
import java.util.List;

import javax.mail.internet.MimeUtility;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFDataFormat;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.base.Throwables;
import com.qunar.flight.ib2b.trade.center.enums.OrderType;

/**
* Excel文件导出 定义类
*
* @author xiongxo.chen
*/
public abstract class AbstractExcelBuilder<T> {

private static final Logger logger = LoggerFactory.getLogger(AbstractExcelBuilder.class);

public void createExcel(final OrderType type, List<T> datas, HttpServletResponse response) {
if (0 == datas.size()) {
return;
}
XSSFWorkbook workBook = new XSSFWorkbook();

OutputStream os;
try {
Sheet sheet = createSheet(workBook);
if (sheet == null)
return;

// 写表头
writeHead(type, sheet, datas);

// 写内容
XSSFCellStyle cellStyle = workBook.createCellStyle();
XSSFDataFormat format = workBook.createDataFormat();
writeBody(type, cellStyle, format, sheet, datas);
response.setContentType("application/vnd.ms-excel");
response.setHeader("Content-disposition", "attachment;filename=OrderDetail.xls");
os = response.getOutputStream();
workBook.write(response.getOutputStream());
os.flush();
} catch (Throwable t) {
logger.error("导出 excel出错！", t);
Throwables.propagate(t);
}
}

/**
* 写表头
*/
protected void writeHead(OrderType type, Sheet sheet, List<T> datas) {
String[] head = getHead(type, datas.get(0));
Row row = sheet.createRow(0);
for (int i = 0; i < head.length; i++) {
row.createCell(i).setCellValue(head[i]);
sheet.setColumnWidth(i, head[i].getBytes().length * 256);
}
}

/**
* 写表体
*/
protected abstract void writeBody(OrderType type, XSSFCellStyle cellStyle, XSSFDataFormat format, Sheet sheet, List<T> datas)
throws Exception;

/**
* 表头内容
*/
protected abstract String[] getHead(OrderType type, T datas);

/**
* Sheet页名称
*/
protected String getSheetName() {
return "xo";
}

/**
* 来个Sheet
*/
private XSSFSheet createSheet(XSSFWorkbook workBook) {
if (StringUtils.isBlank(getSheetName())) {
return workBook.createSheet();
} else {
return workBook.createSheet(getSheetName());
}
}

/**
* 设置下载文件中文件的名称
*/
public static String encodeFilename(String filename) {
/**
* 获取客户端浏览器和操作系统信息 在IE浏览器中得到的是：User-Agent=Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Maxthon; Alexa
* Toolbar) 在Firefox中得到的是：User-Agent=Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.7.10) Gecko/20050717
* Firefox/1.0.6
*/
try {
// 先检查IE浏览器的
String newFileName = URLEncoder.encode(filename, "UTF-8");
newFileName = StringUtils.replace(newFileName, "+", "%20");
if (newFileName.length() > 150) {
newFileName = new String(filename.getBytes("GB2312"), "ISO8859-1");
newFileName = StringUtils.replace(newFileName, " ", "%20");
}
if (StringUtils.isBlank(newFileName)) {
// 若不是IE，则检查Firxbox
return MimeUtility.encodeText(filename, "UTF-8", "B");
}
return filename;
} catch (Exception ex) {
return filename;
}
}
}

package com.qunar.flight.ib2b.trade.center.util.excel;

import java.util.List;

import javax.annotation.Resource;

import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFDataFormat;

import com.qunar.flight.ib2b.trade.center.bean.OrderInfoDetail;
import com.qunar.flight.ib2b.trade.center.enums.OrderType;
import com.qunar.flight.ib2b.trade.center.persistence.dao.TOrderStatusChangeLogMapper;

/**
* 订单信息导出构建器
*
* @author xiongxo.chen
*
*/
public class OrderInfoExcelBuilder extends AbstractExcelBuilder<OrderInfoDetail> {

private static OrderInfoExcelBuilder builder;

@Resource
TOrderStatusChangeLogMapper tOrderStatusChangeLogMapper;

private OrderInfoExcelBuilder() {
}

/**
* 单例
*/
public synchronized static OrderInfoExcelBuilder getInstance() {
if (null == builder)
builder = new OrderInfoExcelBuilder();
return builder;
}

/**
* 写Excel内容
*/
@Override
protected void writeBody(OrderType type, XSSFCellStyle cellStyle, XSSFDataFormat format, Sheet sheet,
List<OrderInfoDetail> datas) throws Exception {
int columnIndex = 0;
int rowIndex = 1;
for (OrderInfoDetail order : datas) {
columnIndex = 0;
Row row = sheet.createRow(rowIndex);
Cell idCell = row.createCell(columnIndex);
// 文本格式
cellStyle.setDataFormat(format.getFormat("@"));
idCell.setCellStyle(cellStyle);
idCell.setCellValue(order.getId());
row.createCell(columnIndex++).setCellValue("写内容1");
row.createCell(columnIndex++).setCellValue("写内容2");
rowIndex++;
}
}

/**
* 写Excel表头
*/
@Override
protected String[] getHead(OrderType type, OrderInfoDetail order) {
return new String[] { "订单创建日期", "订单号"};
}

}