使用poi导出excel并打包的一种方法

1、前提：在HttpServlet中的service()等方法中使用。

2、

package com.isoftstone.runbat.util;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.math.BigDecimal;
import java.sql.Date;
import java.sql.ResultSetMetaData;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import javax.sql.RowSet;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import oracle.sql.TIMESTAMP;
import com.isoftstone.fwk.util.SpringUtils;
public class ExportExcelUtil {
private static Logger logger = LoggerFactory.getLogger(ExportExcelUtil.class);

/**
* @param sql
* 查询数据的sql
* @param outputStream
* 输出流
* @param sheetName
* 工作薄中工作表的名字
*/
public void exportExcel(String sql, OutputStream outputStream,String sheetName) {
HSSFWorkbook wb = new HSSFWorkbook();// 声明一个工作薄
HSSFCellStyle style = wb.createCellStyle(); // 一个样式
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER); // 设置垂直居中
style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 水平居中
HSSFFont headerFont = (HSSFFont) wb.createFont(); // 创建字体样式
headerFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);// 字体加粗
headerFont.setFontName("Times New Roman"); // 设置字体类型
headerFont.setFontHeightInPoints((short) 8); // 设置字体大小
style.setFont(headerFont); // 为标题样式设置字体样式
/*
* style.setBorderBottom(HSSFCellStyle.BORDER_THIN); // 下边框
* style.setBorderLeft(HSSFCellStyle.BORDER_THIN);// 左边框
* style.setBorderTop(HSSFCellStyle.BORDER_THIN);// 上边框
* style.setBorderRight(HSSFCellStyle.BORDER_THIN);// 右边框
*/
style.setWrapText(true);
HSSFSheet sheet = wb.createSheet(sheetName);// 声明工作薄里中一个工作表的名字
sheet.setDefaultColumnWidth(30);// 给工作一个默认长度
HSSFRow row = sheet.createRow(0); // 创建第一行（也可以称为表头）
try {
// 通过传过来的sql获得数据
RowSet rowSet = SpringUtils.getCommonDao().queryNativeSQL(sql,null, false);
ResultSetMetaData columnNames = rowSet.getMetaData();
int columnValues = columnNames.getColumnCount();
for (int i = 0; i < columnValues; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style);
cell.setCellValue(columnNames.getColumnName(i + 1));
}
int rowNo = 1;
int m = 1;
/*
* HSSFFont contextFont = (HSSFFont) wb.createFont(); //创建字体样式
* contextFont.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);//字体加粗
* style.setFont(contextFont);
*/
while (rowSet.next()) {
row = sheet.createRow(rowNo);
for (int columnNo = 0; columnNo < columnValues; columnNo++) {
HSSFCell cell = row.createCell(columnNo);
// cell.setCellStyle(style);
Object columnValue = rowSet.getObject(columnNo + 1);
if (columnValue == null) {
continue;
}
if (columnValue instanceof String) {
cell.setCellValue(rowSet.getString(columnNo + 1));
} else if (columnValue instanceof Integer) {
cell.setCellValue(rowSet.getInt(columnNo + 1));
} else if (columnValue instanceof Double) {
cell.setCellValue(rowSet.getDouble(columnNo + 1));
} else if (columnValue instanceof Date) {
cell.setCellValue(rowSet.getDate(columnNo + 1));
} else if (columnValue instanceof TIMESTAMP) {
cell.setCellValue(rowSet.getTimestamp(columnNo + 1));
} else if (columnValue instanceof BigDecimal) {
cell.setCellValue(rowSet.getBigDecimal(columnNo + 1).doubleValue());
}
}
if (rowNo % 60000 == 0) {
m++;
sheet = wb.createSheet(sheetName + m);// 声明工作薄里中一个工作表的名字
sheet.setDefaultColumnWidth(30);// 给工作一个默认长度
row = sheet.createRow(0); // 创建第一行（也可以称为表头）
for (int i = 0; i < columnValues; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style);
cell.setCellValue(columnNames.getColumnName(i + 1));
}
rowNo = 0;
}
rowNo++;
}
String name = "batch_excel";
File fileBatch = new File(this.getPath()+"batch_excel");
if(!fileBatch.exists()){
fileBatch.mkdir();
}
//默认导出到D盘下
FileOutputStream out = new FileOutputStream(fileBatch+"/"+name+".xls");
wb.write(out);
out.flush();
out.close();// 关闭流
logger.info("导出"+sheetName+"成功");
this.putExcelToZip(sheetName,name,outputStream);
} catch (Exception e) {
e.printStackTrace();
logger.error("导出"+sheetName+"失败");
}
}

public void putExcelToZip(String sheetName,String name,OutputStream outputStream) throws IOException{
File file = new File(this.getPath()+"batch_excel/"+name+".xls");
//File zipFile = new File(this.getPath()+"batch_excel/"+sheetName+".zip");
InputStream input = new FileInputStream(file);
ZipOutputStream zipOut = new ZipOutputStream(outputStream);
ZipEntry zipEntry = new ZipEntry(file.getName());
zipOut.putNextEntry(zipEntry);
// 设置注释
zipOut.setComment("hello");
int temp = 0;
while ((temp = input.read()) != -1) {
zipOut.write(temp);
}
if(file.isFile()){
file.delete();
logger.info("删除excel文件");
}

input.close();
zipOut.close();
logger.info("保存zip文件");

}

public String getPath(){
String path = ExportExcelUtil.class.getResource("/").getPath();
path = path.substring(0, path.indexOf("WEB-INF"));
return path;
}
}