Struts2.18 Poi-3.7 Excel 导入导出

欢迎技术交流。 QQ：138986722

Struts的jar包就不说了~~~！！！

工程.jar包结构：

poi-3.7-20101029.jar

poi-examples-3.7-20101029.jar

poi-ooxml-3.7-20101029.jar

poi-ooxml-schemas-3.7-20101029.jar

poi-scratchpad-3.7-20101029.jar

有些jar包的用不着的、但是我为了以防万一全部都倒进来了！

我的导入页面(OutExcel.jsp)：

<%-- 记住这里需要设置enctype="multipart/form-data"--%>
<s:form action="userInfo" method="post" enctype="multipart/form-data">
导入Excel文件：<s:file name="excelFile"></s:file> <br/>
<s:submit value="导入"></s:submit>
</s:form>

Struts2.xml配置:

<constant name="struts.i18n.encoding" value="UTF-8"></constant>
<constant name="struts.ui.theme" value="simple"></constant>

<package name="excelOutPut" extends="struts-default">
<action name="userInfo" class="userAction">
<result>/excel/InputExcel.jsp</result>
</action>
<action name="outPut" class="outAction">
<result>/excel/InputExcel.jsp</result>
</action>
</package>

Userinfo类：

package com.boxun.bean;

import java.math.BigDecimal;

/**
* Userinfo entity. @author MyEclipse Persistence Tools
*/

public class Userinfo implements java.io.Serializable {

// Fields

private Integer id;
private String name;
private String pass;
private String lastname;
private String addres;
private String remark;

// Constructors

/** default constructor */
public Userinfo() {
}

/** full constructor */
public Userinfo(String name, String pass, String lastname, String addres,
String remark) {
this.name = name;
this.pass = pass;
this.lastname = lastname;
this.addres = addres;
this.remark = remark;
}

// Property accessors

public Integer getId() {
return this.id;
}

public void setId(Integer id) {
this.id = id;
}

public String getName() {
return this.name;
}

public void setName(String name) {
this.name = name;
}

public String getPass() {
return this.pass;
}

public void setPass(String pass) {
this.pass = pass;
}

public String getLastname() {
return this.lastname;
}

public void setLastname(String lastname) {
this.lastname = lastname;
}

public String getAddres() {
return this.addres;
}

public void setAddres(String addres) {
this.addres = addres;
}

public String getRemark() {
return this.remark;
}

public void setRemark(String remark) {
this.remark = remark;
}

}

ExcelWorkSheet类:

package com.boxun.bean;

import java.util.ArrayList;

import java.util.List;

import org.apache.poi.hssf.record.formula.functions.T;

public class ExcelWorkSheet<T> {
private String sheetName;
private List<T> data = new ArrayList<T>();  //数据行
private List<String> columns; //列名
public String getSheetName() {
return sheetName;
}
public void setSheetName(String sheetName) {
this.sheetName = sheetName;
}
public List<T> getData() {
return data;
}
public void setData(List<T> data) {
this.data = data;
}
public List<String> getColumns() {
return columns;
}
public void setColumns(List<String> columns) {
this.columns = columns;
}

}

导入的Action类：

package com.boxun.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.boxun.bean.ExcelWorkSheet;
import com.boxun.bean.Userinfo;
import com.boxun.biz.IUserBiz;
import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport {
private IUserBiz userBiz;
public void setUserBiz(IUserBiz userBiz) {
this.userBiz = userBiz;
}

private File excelFile; //上传的文件

private String excelFileFileName; //保存原始文件名

//将Excel文件解析完毕后信息存放到这个对象中
private ExcelWorkSheet<Userinfo> 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<Userinfo> getExcelWorkSheet() {
return excelWorkSheet;
}

public void setExcelWorkSheet(ExcelWorkSheet<Userinfo> excelWorkSheet) {
this.excelWorkSheet = excelWorkSheet;
}

//判断文件类型
public 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 execute() throws Exception{
Workbook book = createWorkBook(new FileInputStream(excelFile));
//book.getNumberOfSheets();  判断Excel文件有多少个sheet
Sheet sheet =  book.getSheetAt(0);
excelWorkSheet = new ExcelWorkSheet<Userinfo>();
//保存工作单名称
Row firstRow = sheet.getRow(0);
Iterator<Cell> iterator = firstRow.iterator();

//保存列名
List<String> cellNames = new ArrayList<String>();
while (iterator.hasNext()) {
cellNames.add(iterator.next().getStringCellValue());
}
excelWorkSheet.setColumns(cellNames);
for (int i = 1; i <= sheet.getLastRowNum(); i++) {
Row ros = sheet.getRow(i);
Userinfo user = new Userinfo();
user.setId((int)ros.getCell(0).getNumericCellValue());
user.setName(ros.getCell(1).getStringCellValue());
user.setPass(ros.getCell(2).getStringCellValue());
user.setLastname(ros.getCell(3).getStringCellValue());
user.setAddres(ros.getCell(4).getStringCellValue());
user.setRemark(ros.getCell(5).getStringCellValue());
excelWorkSheet.getData().add(user);
}
for (int i = 0; i < excelWorkSheet.getData().size(); i++) {
Userinfo info = excelWorkSheet.getData().get(i);
System.out.println(info.getLastname());
}
return SUCCESS;
}

}

显示导入的数据页面(InputExcel.jsp)：

<h1><s:property value="excelWorkSheet.sheetName" /> </h1>
<p>
<s:iterator value="excelWorkSheet.columns">
<s:property />  ||
</s:iterator>
</p>

<s:iterator var="user" value="excelWorkSheet.data">
<p>
<s:property value="#user.id"/>
<s:property value="#user.name"/>
<s:property value="#user.pass"/>
<s:property value="#user.lastname"/>
<s:property value="#user.addres"/>
<s:property value="#user.remark"/>
</p>
</s:iterator>

导出数据页面(Out.jsp)：

<s:form name="form1" action="outPut.action" method="post">
<input type="hidden" name="format" value="xls" />
<s:submit name="sub" value="导出数据"></s:submit>
</s:form>

导出数据Action:

package com.boxun.action;

import java.io.IOException;

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

import javax.servlet.http.HttpServletResponse;

import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.struts2.interceptor.ServletResponseAware;

import com.boxun.bean.Userinfo;
import com.boxun.biz.IUserBiz;
import com.opensymphony.xwork2.ActionSupport;

public class OutAction extends ActionSupport implements ServletResponseAware{

/**
*
*/
private static final long serialVersionUID = 1L;

private IUserBiz biz ;
public void setBiz(IUserBiz biz) {
this.biz = biz;
}
private String format = "xls";
private HttpServletResponse response;
private String fileName;

public String execute(){

@SuppressWarnings("all")
List la = biz.getAllSql();

setResponseHeader();
try {
exportExcel(response.getOutputStream());
response.getOutputStream().flush();
response.getOutputStream().close();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}

/** 设置响应头*/
public void setResponseHeader(){
try{
//			response.setContentType("application/msexcel;charset=UTF-8");  //两种方法都可以
response.setContentType("application/octet-stream;charset=iso-8859-1");
response.setHeader("Content-Disposition", "attachment;filename="
+java.net.URLEncoder.encode(this.fileName, "UTF-8"));
//客户端不缓存
response.addHeader("Pargam", "no-cache");
response.addHeader("Cache-Control", "no-cache");
}catch(Exception ex){
ex.printStackTrace();
}
}

/**导出数据*/
private void exportExcel(OutputStream os) throws IOException{
Workbook book = new HSSFWorkbook();
Sheet sheet = book.createSheet("导出信息");
Row row = sheet.createRow(0);
row.createCell(0).setCellValue("编号");
row.createCell(1).setCellValue("用户名");
row.createCell(2).setCellValue("密码");
row.createCell(3).setCellValue("真实姓名");
row.createCell(4).setCellValue("地址");
row.createCell(5).setCellValue("备注");
CellStyle sty = book.createCellStyle();
List<Userinfo> list = biz.getAll();
for (int i = 1; i < list.size(); i++) {
Userinfo user = list.get(i-1);
row = sheet.createRow(i);
row.createCell(0).setCellValue(user.getId());
row.createCell(1).setCellValue(user.getName());
row.createCell(2).setCellValue(user.getPass());
row.createCell(3).setCellValue(user.getLastname());
row.createCell(4).setCellValue(user.getAddres());
row.createCell(5).setCellValue(user.getRemark());
}
try{
book.write(os);
}catch(Exception ex){
ex.printStackTrace();
}
}

public String getFormat() {
return format;
}

public void setFormat(String format) {
this.format = format;
this.fileName = "导出数据.xls";
}

public String getFileName() {
return fileName;
}

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

/**记住一定有该属性的set方法*/
public void setServletResponse(HttpServletResponse response) {
this.response = response;
}

}

我用的是sql语句导出、先从数据库把数据查询出来、在导出查询出来的数据。

我的Excel数据格式：



我在导入过程中碰到一个问题~~~就是在用户名和密码这一项的时候、不能够完全的写数字~~~

如果全部是Number(Integer或者int)类型那么在转换这一属性数据的时候就会出错~~~搞不懂！ 必须要加上一个字符才能正确转换！

o(︶︿︶)o 唉！！！

---------------------------------------------2012-11-26更新------------------------------------------------

找到了、我在导入过程中碰到一个问题~~~就是在用户名和密码这一项的时候、不能够完全的写数字~~~

这个问题、很简单：在java代码中把该单元格设置成String类型

如我的Name跟Pass字段：

HSSFCell cell1 = (HSSFCell) ros.getCell(1);
HSSFCell cell2 = (HSSFCell) ros.getCell(2);
cell1.setCellType(Cell.CELL_TYPE_STRING); //把该单元格设置成String类型
cell2.setCellType(Cell.CELL_TYPE_STRING); //把该单元格设置成String类型
user.setName(cell1.getStringCellValue());
user.setPass(cell2.getStringCellValue());