POI根据模板导出Excle

本文用Struts2 + POI

/**
	 *   <action name="exportBiz" class="com.cdg.action.ZTreeAction" method="exportBiz">
     *       <result type="json" name="success" />
     *   </action>
     *   <action name="downloadExcle" class="com.cdg.action.ZTreeAction" method="downloadExcle">
     *       <result type="stream">
     *           <param name="contentType">application/vnd.ms-excel</param>
     *           <param name="inputName">stream</param>
     *           <param name="contentDisposition">attachment;filename="${fileName}.xls"</param>
     *           <param name="bufferSize">4096</param>
     *       </result>
     *   </action>
	 * @return
	 */
	public String exportBiz() {
		try {
			fileName = zTreeService.exportBiz(id);
		} catch (RuntimeException e) {
			e.printStackTrace();
		}																	// MD5
		return SUCCESS;
	}
	
	/**
	 * 保存报表
	 * @return
	 */
	public String downloadExcle() {
		try {
			File file = new File(com.cdg.utils.Config.getInstance().getTempPath() + File.separator + fileName);
			FileInputStream fis = new FileInputStream(file);
			byte[] data = new byte[fis.available()];
			fis.read(data);
			stream = new ByteArrayInputStream(data);
			downloadFileName = "报表";
			//这里得转换字符,否则页面有下载异常
			fileName = new String(downloadFileName.getBytes("GBK"), "ISO8859-1");
			fis.close();
			file.delete();
		} catch (Exception e) {
			e.printStackTrace();
		}
		return SUCCESS;
	}
	
	
	private InputStream stream;
	private String downloadFileName;
	private String fileName;
	
	public InputStream getStream() {
		return stream;
	}

	public String getDownloadFileName() {
		return downloadFileName;
	}

	public void setDownloadFileName(String downloadFileName) {
		this.downloadFileName = downloadFileName;
	}

	public String getFileName() {
		return fileName;
	}

	public void setFileName(String fileName) {
		this.fileName = fileName;
	}

BIZ层

private final static String YYYYTMMTDDTHH24 = "yyyy-MM-dd HH:mm:ss";

	public static SimpleDateFormat getYYYYTMMTDDTHH24Fmt() {
		return new SimpleDateFormat(YYYYTMMTDDTHH24);
	}

	public String exportBiz(String ids) {
		String exportFileName = "aa";
		try {
			InputStream template = this
					.getClass()
					.getResourceAsStream(
							"/com/cdg/template/loginLog.xls");
			HSSFWorkbook workbook = new HSSFWorkbook(template);

			String date = getYYYYTMMTDDTHH24Fmt().format(new Date());
			Collection<LoginLog> list = new ArrayList<LoginLog>();
			LoginLog e = new LoginLog(1,"qqq",21,"123123","123123123");
			list.add(e);
			if (ids != null && !"".equals(ids)) {
				// list = this.loginLogDao.findCheckBy(ids);
			} else {
				// list = this.loginLogDao.findBy(queryObj);
			}
			HSSFSheet sheet = workbook.getSheetAt(0);
			workbook.setSheetName(workbook.getSheetIndex(sheet), "报表");
			writeHeadToSheet(sheet, "报表", date);

			fillReportData(sheet, list);

			String fileName = com.cdg.utils.Config.getInstance().getTempPath()
					+ File.separator + exportFileName;
			FileOutputStream fos = new FileOutputStream(fileName);
			workbook.write(fos);
			fos.close();
			template.close();
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
		return exportFileName;
	}

	/**
	 * 写头数据
	 * 
	 * @param sheet
	 * @param deptName
	 * @param date
	 */
	private void writeHeadToSheet(HSSFSheet sheet, String deptName, String date) {
		sheet.getRow(1).getCell(5).setCellValue(new HSSFRichTextString(date));

		sheet.getRow(1).getCell(2).setCellValue(
				new HSSFRichTextString(deptName));
	}

	/**
	 * 生成报表数据
	 * 
	 * @param sheet
	 * @param data
	 */
	private void fillReportData(HSSFSheet sheet, Collection<LoginLog> data) {
		int rownum = 2;
		List<HSSFCellStyle> style = new ArrayList<HSSFCellStyle>(0);
		HSSFRow rowModel = sheet.getRow(3);
		for (int i = 0; i < 6; i++) {
			style.add(rowModel.getCell(i).getCellStyle());
		}
		sheet.removeRow(rowModel);
		for (LoginLog bean : data) {
			HSSFRow row = sheet.getRow(++rownum);
			if (row == null) {
				row = sheet.createRow(rownum);
				int column = 1;
				// 序号
				// HSSFCell cell0 = (row.getCell(column) == null ? row
				// .createCell(column) : row.getCell(column));
				// cell0.setCellStyle(style.get(0));
				// cell0.setCellValue(new HSSFRichTextString());
				// column++;
				// 1
				HSSFCell cell1 = (row.getCell(column) == null ? row
						.createCell(column) : row.getCell(column));
				cell1.setCellStyle(style.get(column));
				if (bean.getId() != null) {
					cell1.setCellValue(new HSSFRichTextString(bean.getId()
							.toString()));
				}
				column++;
				// 2
				HSSFCell cell2 = (row.getCell(column) == null ? row
						.createCell(column) : row.getCell(column));
				cell2.setCellStyle(style.get(column));
				if (bean.getName() != null) {
					cell2.setCellValue(new HSSFRichTextString(bean.getName()));
				}
				column++;
				// 3
				HSSFCell cell3 = (row.getCell(column) == null ? row
						.createCell(column) : row.getCell(column));
				cell3.setCellStyle(style.get(column));
				if (bean.getAge() != null) {
					cell3.setCellValue(new HSSFRichTextString(bean.getAge()
							.toString()));
				}
				column++;
				// 34
				HSSFCell cell4 = (row.getCell(column) == null ? row
						.createCell(column) : row.getCell(column));
				cell4.setCellStyle(style.get(column));
				if (bean.getPhone() != null) {
					cell4.setCellValue(new HSSFRichTextString(bean.getPhone()));
				}
				column++;
				// 5
				HSSFCell cell5 = (row.getCell(column) == null ? row
						.createCell(column) : row.getCell(column));
				cell5.setCellStyle(style.get(column));
				if (bean.getAddress() != null) {
					cell5.setCellValue(new HSSFRichTextString(bean.getAddress()));
				}
				column++;

			}
		}
	}

domain

public class LoginLog {

	private Integer id;
	private String name;
	private Integer age;
	private String phone;
	private String address;
	public String getPhone() {
		return phone;
	}
	public void setPhone(String phone) {
		this.phone = phone;
	}
	public String getAddress() {
		return address;
	}
	public void setAddress(String address) {
		this.address = address;
	}
	public LoginLog(){}
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Integer getAge() {
		return age;
	}
	public void setAge(Integer age) {
		this.age = age;
	}
	public LoginLog(Integer id, String name, Integer age, String phone,
			String address) {
		this.id = id;
		this.name = name;
		this.age = age;
		this.phone = phone;
		this.address = address;
	}
	
}

JSP导出代码

ExtJS

form.submit({
			                	url: 'exportBiz.action',
			                    success: function(form, action) {
			                    	
									//保存导出报表
									var fileName = action.result.fileName;
									var downloadFileName = action.result.downloadFileName;
									var url = "downloadExcle.action?fileName=" + fileName + "&downloadFileName="+downloadFileName;
									window.location = url;
										
			                    },
			                    failure: function(form, action) {
			                        Ext.Msg.alert('Failed', action.result);
			                    }
			                });

临时文件路径

import java.io.File;

public class Config {
	// 导出文件临时目录
	private String tempPath;
	private static Config instance;
	private Config() {
		instance = this;
	}
	public static Config getInstance() {
		return instance;
	}

	public String getTempPath() {
		return tempPath;
	}

	public void setTempPath(String tempPath) {
		this.tempPath = tempPath;
		File dir = new File(this.tempPath);
		dir.mkdirs();
	}
}

通过Spring注入

<bean id="lscmConfig"
		class="com.cdg.utils.Config">
		<property name="tempPath" value="/tmp/" />
	</bean>