Struts2.18 Poi-3.7 Excel 导入导出

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;
    }
    ...set and get...

}

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());