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使用poi来实现excel文件的导入导出。使用struts2来做处理。
首先看jsp页面：
index.jsp:
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%@ taglib uri="/struts-tags" prefix="s"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>导入数据</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <h1> 导入Excel数据 </h1> <s:form action="import!importExcel.action" enctype="multipart/form-data" method="post"> 导入Excel文件：<s:file name="excelFile"></s:file> <br /> <s:submit value="导入"></s:submit> </s:form> </body> </html>
action中的主要代码：原来依然是通过文件上传的原理来实现，只不过导入是将文件里的数据进行解析。
package com.chinasoft.action; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import org.apache.poi.hssf.usermodel.HSSFWorkbook; 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.ss.usermodel.Workbook; import org.apache.poi.xssf.usermodel.XSSFWorkbook; import com.chinasoft.dao.StudentDAO; import com.chinasoft.entity.ExcelWorkSheet; import com.chinasoft.entity.Student; import com.opensymphony.xwork2.ActionSupport; public class ImportExcelAction extends ActionSupport { private StudentDAO dao = new StudentDAO(); private File excelFile; private String excelFileFileName; private ExcelWorkSheet<Student> excelWorkSheet; public File getExcelFile() { return excelFile; } public void setExcelFile(File excelFile) { this.excelFile = excelFile; } public String getExcelFileFileName() { return excelFileFileName; } public void setExcelFileFileName(String excelFileFileName) { this.excelFileFileName = excelFileFileName; } public ExcelWorkSheet<Student> getExcelWorkSheet() { return excelWorkSheet; } public void setExcelWorkSheet(ExcelWorkSheet<Student> excelWorkSheet) { this.excelWorkSheet = excelWorkSheet; } private Workbook createWorkBook(InputStream is) throws IOException { if (excelFileFileName.toLowerCase().endsWith("xls")) { return new HSSFWorkbook(is); } if (excelFileFileName.toLowerCase().endsWith("xlsx")) { return new XSSFWorkbook(is); } return null; } public String importExcel() throws Exception { Workbook workbook = createWorkBook(new FileInputStream(excelFile)); Sheet sheet = workbook.getSheetAt(0); excelWorkSheet = new ExcelWorkSheet<Student>(); excelWorkSheet.setSheetName(sheet.getSheetName()); Row firstRow = sheet.getRow(0); Iterator<Cell> iterator = firstRow.iterator(); List<String> cellNames = new ArrayList<String>(); while (iterator.hasNext()) { cellNames.add(iterator.next().getStringCellValue()); } for (int i = 1; i <= sheet.getLastRowNum(); i++) { Row row = sheet.getRow(i); Student student = new Student(); System.out.println(row.getCell(0).getNumericCellValue()); //student.setId((int) row.getCell(1).getNumericCellValue()); student.setName(row.getCell(1).getStringCellValue()); //student.setSex(row.getCell(2).getStringCellValue()); //student.setBirthday(row.getCell(3).getDateCellValue()); excelWorkSheet.getData().add(student); //this.dao.addStudent(student); } return SUCCESS; } }
struts的配置也没有多大的变化，如下：
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd"> <struts> <package name="chinasoft" extends="struts-default"> <action name="import" class="com.chinasoft.action.ImportExcelAction"> <result>/index.jsp</result> </action> </package> </struts>
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原文地址：http://www.cnblogs.com/kailing-con/p/4207454.html
