Java操作Excel（使用JXL）

一、本地操作

1、读取

 package com.ljf.mb;

 import java.io.FileInputStream;
 import java.io.InputStream;

 import jxl.Cell;
 import jxl.Sheet;
 import jxl.Workbook;

 public class ReadExcel
 {
     public static void main(String[] args) throws Exception
     {
         {
             String filePath = "d:/.xls"; //文件在电脑中的位置
             InputStream is = new FileInputStream(filePath);
             Workbook rwb = Workbook.getWorkbook(is);

             Sheet rs = rwb.getSheet(0);// 获取第一张Sheet表
             int hangNum = rs.getRows();//得到总行数

             for (int i = 1; i < hangNum; i++)
             {
             String name = getCallStr(rs, i, 5).trim(); //得到第i行，第5列数据，行列均是从0开始
             String gg = getCallStr(rs, i, 6).trim();
             System.out.println(name + "   " + gg);  //组织自己想要的输出
             }
             }
             }

     /**
      * 功能描述：得到工作表中某个单元格的数据
      *</br>日期：2013-3-29
      *</br>@author ： 劲风
      *</br>@param rs 工作表对象
      *</br>@param hang  行数，从0开始
      *</br>@param lie 列数，从0开始
      *</br>@return  单元格的内容
      */
     public static String getCallStr(Sheet rs, int hang, int lie)
     {
         Cell cell = rs.getCell(lie, hang);
         String value = cell.getContents();
         if (value != null)
         {
             return value.trim();
         }
         return "";
     }
 }

2、生成

 import java.io.File;
 import jxl.Workbook;
 import jxl.write.Label;
 import jxl.write.WritableSheet;
 import jxl.write.WritableWorkbook;

 public class WriteExcel
 {

     public static void main(String[] args) throws Exception
     {
          WritableWorkbook wwb = null;
          WritableSheet ws = null;
          try
          {
                 //首先要使用Workbook类的工厂方法创建一个可写入的工作薄(Workbook)对象
                 wwb = Workbook.createWorkbook(new File("d:/tables/one.xls"));
                 if(wwb!=null)
                 {
                     //创建一个可写入的工作表
                     ws = wwb.createSheet("sheet1", 0); //第一个是工作表的名称，第二个是工作表在工作薄中的位置   

                     //下面开始添加单元格
                     Label lab00 = creatLabel(0, 0, "姓名");  //行，列，内容
                     Label lab01 = creatLabel(0, 1, "年龄");  //行，列，内容
                     Label lab10 = creatLabel(1, 0, "张三");  //行，列，内容
                     Label lab11 = creatLabel(1, 1, "20");  //行，列，内容

                     ws.addCell(lab00);
                     ws.addCell(lab01);
                     ws.addCell(lab10);
                     ws.addCell(lab11);

                     wwb.write();    //从内存中写入文件中
                     wwb.close(); //关闭资源，释放内存
                 }
             }
             catch (Exception e)
             {
                 e.printStackTrace();
             }   

     }

     public static Label creatLabel(int hang,int lie,String con) //行，列，内容
     {
         return new Label(lie, hang, con);
     }
 }

二、Spring MVC 生成下载Excel

1、页面请求

<a href="javascript:void(0)" class="easyui-linkbutton exportBtn" iconCls="glyphicon-export" plain="true" onclick="exportCsv()">导出</a>

......

<script type="text/javascript">
//导出（未实现）
function exportCsv() {
    var option = datagrid.datagrid("options");
    var param = option.queryParams;
    param.sortName = option.sortName;
    param.sortOrder = option.sortOrder;
    window.location.href = "exportExcel?" + $.param(param);
}
</script>

2、后台逻辑

 /**
      * 导出Excel
      * @throws Exception
      */
     @RequestMapping("/exportExcel")
     public void exportExcel(HttpServletResponse response,OutBillVo vo) throws Exception {

         List<OutBill> ls=service.exportExcelQuery(vo); //取得导出数据

         File file = new File("aaa.xls");
         jxl.write.WritableWorkbook book = Workbook.createWorkbook(file); //工作薄
         jxl.write.WritableSheet sheet = book.createSheet("Sheet1", 0); //工作表

         //设置行高
         sheet.getSettings().setDefaultRowHeight(350); //设置所有行默认行高
         sheet.setRowView(0, 700);//第1行 高度
         sheet.setRowView(1, 400);//第2行 高度

         //设置个别列宽
         sheet.setColumnView(1, 16);//宽度设置：登记时间
         sheet.setColumnView(8, 16);//宽度设置：出发时间
         sheet.setColumnView(9, 16);//宽度设置：归队时间
         sheet.setColumnView(6, 12);//宽度设置：用车部门
         sheet.setColumnView(7, 16);//宽度设置：目的地
         sheet.setColumnView(18, 12);//宽度设置：车辆状况
         sheet.setColumnView(19, 16);//宽度设置：备注

         //定义格式
         //主标题格式
         WritableCellFormat formatterTitle= new WritableCellFormat(); //标题格式
         formatterTitle.setAlignment(Alignment.CENTRE);//水平对齐
         formatterTitle.setVerticalAlignment(VerticalAlignment.CENTRE);//垂直对齐
         //WritableFont font = new WritableFont(WritableFont.createFont("ＭＳ Ｐゴシック"), 18, WritableFont.BOLD, false); //黑体
         WritableFont font = new WritableFont(WritableFont.TAHOMA, 18, WritableFont.BOLD, false);
         formatterTitle.setFont(font);

         //列标题格式
         WritableCellFormat formatterColumnTitle= new WritableCellFormat(); //列标题格式
         formatterColumnTitle.setAlignment(Alignment.CENTRE);//水平对齐
         formatterColumnTitle.setVerticalAlignment(VerticalAlignment.CENTRE);//垂直对齐
         formatterColumnTitle .setBackground(Colour.GRAY_25);//背景色
         formatterColumnTitle.setBorder(Border.ALL, BorderLineStyle.THIN);//边框线  所有边框 细线

         //普通内容格式
         WritableCellFormat formatterCon= new WritableCellFormat(); //内容格式
         formatterCon.setAlignment(Alignment.CENTRE);//水平对齐
         formatterCon.setVerticalAlignment(VerticalAlignment.CENTRE);//垂直对齐
         formatterCon.setBorder(Border.ALL, BorderLineStyle.THIN);//边框线  所有边框 细线

         //合计行格式
         WritableCellFormat formatterSum= new WritableCellFormat(); //合计格式
         formatterSum.setAlignment(Alignment.CENTRE);//水平对齐
         formatterSum.setVerticalAlignment(VerticalAlignment.CENTRE);//垂直对齐
         formatterSum.setBorder(Border.ALL, BorderLineStyle.THIN);//边框线  所有边框 细线
         WritableFont font_sum = new WritableFont(WritableFont.TAHOMA, 10, WritableFont.BOLD, false);
         formatterSum.setFont(font_sum);

         //输出标题
         sheet.mergeCells(0, 0, 19, 0); //合并单元格（标题）
         sheet.addCell(creatLabel(0,0,"车辆外出登记表",formatterTitle));

         //输出列标题
         int rowNum=1; //行号
         int columnNum=0; //列号
         sheet.addCell(creatLabel(rowNum,columnNum++,"序号",formatterColumnTitle));
         sheet.addCell(creatLabel(rowNum,columnNum++,"登记时间",formatterColumnTitle));
         sheet.addCell(creatLabel(rowNum,columnNum++,"车辆",formatterColumnTitle));
         sheet.addCell(creatLabel(rowNum,columnNum++,"驾驶员",formatterColumnTitle));
         sheet.addCell(creatLabel(rowNum,columnNum++,"用车人",formatterColumnTitle));
         sheet.addCell(creatLabel(rowNum,columnNum++,"审批人",formatterColumnTitle));
         sheet.addCell(creatLabel(rowNum,columnNum++,"用车部门",formatterColumnTitle));
         sheet.addCell(creatLabel(rowNum,columnNum++,"目的地",formatterColumnTitle));
         sheet.addCell(creatLabel(rowNum,columnNum++,"出发时间",formatterColumnTitle));
         sheet.addCell(creatLabel(rowNum,columnNum++,"归队时间",formatterColumnTitle));
         sheet.addCell(creatLabel(rowNum,columnNum++,"总时长",formatterColumnTitle));
         sheet.addCell(creatLabel(rowNum,columnNum++,"等待时长",formatterColumnTitle));
         sheet.addCell(creatLabel(rowNum,columnNum++,"出发里程",formatterColumnTitle));
         sheet.addCell(creatLabel(rowNum,columnNum++,"归队里程",formatterColumnTitle));
         sheet.addCell(creatLabel(rowNum,columnNum++,"使用里程",formatterColumnTitle));
         sheet.addCell(creatLabel(rowNum,columnNum++,"加油金额",formatterColumnTitle));
         sheet.addCell(creatLabel(rowNum,columnNum++,"过/停费",formatterColumnTitle));
         sheet.addCell(creatLabel(rowNum,columnNum++,"总费用",formatterColumnTitle));
         sheet.addCell(creatLabel(rowNum,columnNum++,"车辆状况",formatterColumnTitle));
         sheet.addCell(creatLabel(rowNum,columnNum++,"备注",formatterColumnTitle));

         //合计项
         int useNum = 0; // 使用里程
         double useTime = 0; // 使用时长(小时，保留一位小数)
         double waitTime = 0; // 等待时间(小时，保留一位小数)
         double fuelNum = 0; // 加油费
         double otherFee = 0; // 其他费用（过路费、停车费）
         double allFee = 0; // 全部费用

         if(ls != null && ls.size() > 0)
         {
             SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm"); //日期格式化
             for(int i = 0; i < ls.size(); i++)
             {
                 OutBill bo = ls.get(i);
                 rowNum++;
                 columnNum=0;

                 //非必填项Null值处理
                 Double fuelNumDouble = bo.getFuelNum(); //加油费
                 Double otherFeeDouble = bo.getOtherFee(); //其他费用（过路费、停车费）
                 String remark = bo.getRemark(); //备注
                 String  carStatus = bo.getCarStatus(); //车辆状况

                 String fuelNumStr = ""; //
                 if(fuelNumDouble != null){fuelNumStr = fuelNumDouble.toString();}
                 String otherFeeStr = ""; //
                 if(otherFeeDouble != null){otherFeeStr = otherFeeDouble.toString();}
                 if(remark == null){remark="";}
                 if(carStatus == null){remark="";}

                 //输出一行数据
                 sheet.addCell(creatLabel(rowNum,columnNum++,(i+1)+"",formatterCon)); //序号
                 sheet.addCell(creatLabel(rowNum,columnNum++,formatter.format(bo.getAddTime()) ,formatterCon)); //登记时间
                 sheet.addCell(creatLabel(rowNum,columnNum++,bo.getCar().getName() ,formatterCon)); //车辆
                 sheet.addCell(creatLabel(rowNum,columnNum++,bo.getDriver() ,formatterCon)); //驾驶员
                 sheet.addCell(creatLabel(rowNum,columnNum++,bo.getUser() ,formatterCon)); //用车人
                 sheet.addCell(creatLabel(rowNum,columnNum++,bo.getApprover(),formatterCon)); //审批人
                 sheet.addCell(creatLabel(rowNum,columnNum++,bo.getOrgan().getName() ,formatterCon)); //用车部门
                 sheet.addCell(creatLabel(rowNum,columnNum++,bo.getDestination() ,formatterCon)); //目的地
                 sheet.addCell(creatLabel(rowNum,columnNum++,formatter.format(bo.getBeginTime()) ,formatterCon)); //出发时间
                 sheet.addCell(creatLabel(rowNum,columnNum++,formatter.format(bo.getEndTime()) ,formatterCon)); //归队时间
                 sheet.addCell(creatLabel(rowNum,columnNum++,bo.getUseTime()+"" ,formatterCon)); //总时长
                 sheet.addCell(creatLabel(rowNum,columnNum++,bo.getWaitTime()+"" ,formatterCon)); //等待时长
                 sheet.addCell(creatLabel(rowNum,columnNum++,bo.getBeginNum()+"" ,formatterCon)); //出发里程
                 sheet.addCell(creatLabel(rowNum,columnNum++,bo.getEndNum()+"" ,formatterCon)); //归队里程
                 sheet.addCell(creatLabel(rowNum,columnNum++,bo.getUseNum()+"" ,formatterCon)); //使用里程
                 sheet.addCell(creatLabel(rowNum,columnNum++,fuelNumStr ,formatterCon)); //加油金额
                 sheet.addCell(creatLabel(rowNum,columnNum++,otherFeeStr ,formatterCon)); //过 / 停费
                 sheet.addCell(creatLabel(rowNum,columnNum++,bo.getAllFee()+"" ,formatterCon)); //总费用
                 sheet.addCell(creatLabel(rowNum,columnNum++,carStatus ,formatterCon)); //车辆状况
                 sheet.addCell(creatLabel(rowNum,columnNum++,remark,formatterCon)); //备注

                 //合计项累加
                 if(bo.getUseNum() != null)
                 {
                     useNum += bo.getUseNum();
                 }
                 if(bo.getUseTime() != null)
                 {
                     useTime += bo.getUseTime();
                 }
                 if(bo.getWaitTime() != null)
                 {
                     waitTime += bo.getWaitTime();
                 }
                 if(bo.getFuelNum() != null)
                 {
                     fuelNum += bo.getFuelNum();
                 }
                 if(bo.getOtherFee() != null)
                 {
                     otherFee += bo.getOtherFee();
                 }
                 if(bo.getAllFee() != null)
                 {
                     allFee += bo.getAllFee();
                 }
             }

             //表格增加合计项
             rowNum++;
             columnNum = 0;
             sheet.setRowView(rowNum, 400);//合计行 高度

             sheet.addCell(creatLabel(rowNum,columnNum++,"",formatterSum)); //序号
             sheet.addCell(creatLabel(rowNum,columnNum++,"" ,formatterSum)); //登记时间
             sheet.addCell(creatLabel(rowNum,columnNum++,"" ,formatterSum)); //车辆
             sheet.addCell(creatLabel(rowNum,columnNum++,"" ,formatterSum)); //驾驶员
             sheet.addCell(creatLabel(rowNum,columnNum++,"" ,formatterSum)); //用车人
             sheet.addCell(creatLabel(rowNum,columnNum++,"",formatterSum)); //审批人
             sheet.addCell(creatLabel(rowNum,columnNum++,"" ,formatterSum)); //用车部门
             sheet.addCell(creatLabel(rowNum,columnNum++,"" ,formatterSum)); //目的地
             sheet.addCell(creatLabel(rowNum,columnNum++,"" ,formatterSum)); //出发时间
             sheet.addCell(creatLabel(rowNum,columnNum++,"合计",formatterSum)); //归队时间
             sheet.addCell(creatLabel(rowNum,columnNum++,useTime+"" ,formatterSum)); //总时长
             sheet.addCell(creatLabel(rowNum,columnNum++,waitTime+"" ,formatterSum)); //等待时长
             sheet.addCell(creatLabel(rowNum,columnNum++,"" ,formatterSum)); //出发里程
             sheet.addCell(creatLabel(rowNum,columnNum++,"" ,formatterSum)); //归队里程
             sheet.addCell(creatLabel(rowNum,columnNum++,useNum+"" ,formatterSum)); //使用里程
             sheet.addCell(creatLabel(rowNum,columnNum++,fuelNum+"" ,formatterSum)); //加油金额
             sheet.addCell(creatLabel(rowNum,columnNum++,otherFee+"" ,formatterSum)); //过 / 停费
             sheet.addCell(creatLabel(rowNum,columnNum++,allFee+"" ,formatterSum)); //总费用
             sheet.addCell(creatLabel(rowNum,columnNum++,"" ,formatterSum)); //车辆状况
             sheet.addCell(creatLabel(rowNum,columnNum++,"",formatterSum)); //备注

         }

         //-------------------------------

         book.write();
         book.close();

         FileInputStream f = new FileInputStream(file);
         byte[] fb = new byte[f.available()];
         f.read(fb);
         response.setHeader("Content-disposition", "attachment; filename=" + new String("出车记录.xls".getBytes("gb2312"), "iso8859-1"));
         ByteArrayInputStream bais = new ByteArrayInputStream(fb);
         int b;
         while ((b = bais.read()) != -1)
         {
             response.getOutputStream().write(b);
         }
         response.getOutputStream().flush();
         f.close();

     }

     private Label creatLabel(int rowNum,int columnNum,String con,WritableCellFormat formatter) //行，列，内容 ，格式化
     {
          return new Label(columnNum, rowNum, con,formatter);
     }