jxl导出Excel

首先先在自己工程中导入jxl的jar包；

疯狂google后找到一段别人的导出excel方法，先备份于下面：

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import java.util.Vector;

import jxl.Cell;

import jxl.Sheet;

import jxl.Workbook;

import jxl.format.Alignment;

import jxl.format.Colour;

import jxl.format.UnderlineStyle;

import jxl.format.VerticalAlignment;

import jxl.write.Label;

import jxl.write.WritableCellFormat;

import jxl.write.WritableFont;

import jxl.write.WritableSheet;

import jxl.write.WritableWorkbook;

import jxl.write.WriteException;

import jxl.write.biff.RowsExceededException;

public class ExportData {

    /** *//**

     * 导出数据为XLS格式

     * @param fileName        文件的名称，可以设为绝对路径，也可以设为相对路径

     * @param content        数据的内容

     */

    public static void exportExcel(String fileName, Vector<Person> content) {

        WritableWorkbook wwb;

        FileOutputStream fos;

        try {    

            fos = new FileOutputStream(fileName);

            wwb = Workbook.createWorkbook(fos);

            WritableSheet ws = wwb.createSheet("三国志武将列表", 10);        // 创建一个工作表

            //    设置单元格的文字格式

            WritableFont wf = new WritableFont(WritableFont.ARIAL,12,WritableFont.NO_BOLD,false,

                    UnderlineStyle.NO_UNDERLINE,Colour.BLUE);

            WritableCellFormat wcf = new WritableCellFormat(wf);

            wcf.setVerticalAlignment(VerticalAlignment.CENTRE); 

            wcf.setAlignment(Alignment.CENTRE); 

            ws.setRowView(1, 500);

            //    填充数据的内容

            Person[] p = new Person[content.size()];

            for (int i = 0; i < content.size(); i++){

                p[i] = (Person)content.get(i);

                ws.addCell(new Label(1, i + 1, p[i].getName(), wcf));

                ws.addCell(new Label(2, i + 1, p[i].getNickname(), wcf));

                ws.addCell(new Label(3, i + 1, p[i].getPower(), wcf));

                ws.addCell(new Label(4, i + 1, p[i].getWit(), wcf));

                ws.addCell(new Label(5, i + 1, p[i].getPolity(), wcf));

                ws.addCell(new Label(6, i + 1, p[i].getCharm(), wcf));

                ws.addCell(new Label(7, i + 1, p[i].getStory(), wcf));

                if(i == 0)

                    wcf = new WritableCellFormat();

            }

            wwb.write();

            wwb.close();

        } catch (IOException e){

        } catch (RowsExceededException e){

        } catch (WriteException e){}

    }

    /** *//**

     * 从Excel文件里读取数据保存到Vector里

     * @param fileName        Excel文件的名称

     * @return                Vector对象,里面包含从Excel文件里获取到的数据

     */

    public static Vector<Person> importExcel(String fileName){

        Vector<Person> v = new Vector<Person>();

        try {

            Workbook book = Workbook.getWorkbook(new File(fileName));

            Sheet sheet = book.getSheet(0);        // 获得第一个工作表对象 

            int rows = sheet.getRows();

            

            for(int i = 0; i < rows; i++) {

                Cell [] cell = sheet.getRow(i);

                if(cell.length == 0)

                    continue;

                

                Person p = new Person();

                p.setName(sheet.getCell(1, i).getContents());

                p.setNickname(sheet.getCell(2, i).getContents());

                p.setPower(sheet.getCell(3, i).getContents());

                p.setWit(sheet.getCell(4, i).getContents());

                p.setPolity(sheet.getCell(5, i).getContents());

                p.setCharm(sheet.getCell(6, i).getContents());

                p.setStory(sheet.getCell(7, i).getContents());

                v.add(p);

            }

            book.close();

        }catch(Exception e) {} 

        return v;

    }

    public static void main(String [] args){

        String fileName = "C:\\test.xls";

        String fileNameNew = "C:\\testNew.xls";

        

        Person p0 = new Person("姓名","字","武力","智力","政治","魅力","英雄事迹");

        Person p1 = new Person("赵云","子龙","98","84","83","87","单骑救主!!!");

        Person p2 = new Person("马超","孟起","98","62","40","88","杀得曹操割须弃袍!!!");

        Person p3 = new Person("诸葛亮","孔明","55","100","92","93","死后木偶退兵，锦囊杀魏延!!!");

        Vector<Person> v = new Vector<Person>();

        v.add(p0);

        v.add(p1);

        v.add(p2);

        v.add(p3);

        

        exportExcel(fileName, v);

        System.out.println("成功导出数据到Excel文件(" + fileName + ")了!!!");

        

//        Vector<Person> vector = importExcel(fileName);

//        System.out.println("成功从Excel文件(" + fileName + ")导入数据!!!");

//        

//        exportExcel(fileNameNew, vector);

//        System.out.println("成功将" + fileName + "里的数据手复制到" + fileNameNew + "中!!!");

    }

}

上面的方法很好，导出我试过了，很好用，但它只实现了自动生成了excel文件；但是我们项目要求的是：弹出保存/打开excel的对话框，然后直接打开或输入路径再保存；

import java.io.IOException;

import java.io.OutputStream;

import java.util.HashMap;

import java.util.Vector;

import javax.servlet.http.HttpServletResponse;

import jxl.Workbook;

import jxl.format.Alignment;

import jxl.format.Colour;

import jxl.format.UnderlineStyle;

import jxl.format.VerticalAlignment;

import jxl.write.Label;

import jxl.write.WritableCellFormat;

import jxl.write.WritableFont;

import jxl.write.WritableSheet;

import jxl.write.WritableWorkbook;

import jxl.write.WriteException;

import jxl.write.biff.RowsExceededException;

public class ExportExcel {

public static void exportExcel( Object objIn,Object objOut) {

         try {

         //取得response HttpServletResponse

         HashMap hmOut = (HashMap)objOut;

         HashMap hmIn = (HashMap)objIn;

         HttpServletResponse response=(HttpServletResponse)hmIn.get("response");

         //设置table列名

         String excelName =(String)hmIn.get("excelName");

         String[] excelNameArray = excelName.split(",");

         

         

         //取得key

         String[] excelKeyArray = (String[])hmOut.get("excelKey");

         

         OutputStream os = response.getOutputStream();// 取得输出流   

             response.reset();// 清空输出流  

             response.setHeader("Content-disposition", "attachment; filename="+new String("Book1".getBytes("GB2312"),"8859_1")+".xls");// 设定输出文件头   

             response.setContentType("application/msexcel");// 定义输出类型 

             

             WritableWorkbook wwb = Workbook.createWorkbook(os); // 建立excel文件   

         

             WritableSheet ws = wwb.createSheet("Sheet1", 10);        // 创建一个工作表

             //    设置单元格的文字格式

             WritableFont wf = new WritableFont(WritableFont.ARIAL,10,WritableFont.NO_BOLD,false,

                     UnderlineStyle.NO_UNDERLINE,Colour.BLUE);

             WritableCellFormat wcf = new WritableCellFormat(wf);

             wcf.setVerticalAlignment(VerticalAlignment.CENTRE); 

             wcf.setAlignment(Alignment.CENTRE); 

             ws.setRowView(0, 500);

             //    填充数据的内容

             int len=((String[])hmOut.get(excelKeyArray[0])).length;

             //设置列头名

         for (int j=0;j<excelKeyArray.length;j++){

            ws.addCell(new Label(j, 0, excelNameArray[j], wcf));

         }

         //设置内容

         wcf = new WritableCellFormat();

             for (int i = 0; i <len; i++){

             for (int j=0;j<excelKeyArray.length;j++){

                ws.addCell(new Label(j, i+1, ((String[])hmOut.get(excelKeyArray[j]))[i], wcf));

             }

             }

             wwb.write();

             wwb.close();

         } catch (IOException e){

         } catch (RowsExceededException e){

         } catch (WriteException e){}

     }

}

注：现在弹出对话框，就是说要用io流的方式，io流就要从response中取；这里要导入tomcat里的一个jar：servlet.jar