Excel导入导出

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<dependency>
<groupId>jexcelapi</groupId>
<artifactId>jxl</artifactId>
<version>2.6</version>
</dependency>

package com.haiersoft.buztest.util;

import java.io.*;
import jxl.*;
import jxl.write.*;
import jxl.format.*;

import java.text.SimpleDateFormat;
import java.util.*;
import jxl.write.Number;
import jxl.write.Boolean;

public class ExcelTest {

public static List list=new ArrayList();

//输出流，X轴Y轴；自定义关联表导出
// public static void writeExcel(OutputStream os,int x,int y,List content) throws Exception {
//   RegUser user=new RegUser();
//   String str="";
//  jxl.write.WritableWorkbook wwb = Workbook.createWorkbook(os);
//  jxl.write.WritableSheet ws = wwb.createSheet("Sheet", 0);
//
////  jxl.write.Label labelC = new jxl.write.Label(x, y,content);
////  labelC = new jxl.write.Label(4, 4,content);
////
//  if (ws != null) {
//
//   // 下面开始添加单元格
//   for (int i = 0; i < x; i++) {
//
//
//    for (int j = 0; j < y; j++) {
//     // 这里需要注意的是，在Excel中，第一个参数表示列，第二个表示行
//     user=(RegUser)content.get(i);
//
//     if(j==0){
//      str=user.getUserName();
//     }else if(j==1){
//      str=user.getPassword();
//     }else if(j==2){
//      str=user.getUserContent();
//     }else if(j==3){
//      str=user.getFlag();
//     }else if(j==4){
//      str=user.getUserTime();
//     }else if(j==5){
//      str=String.valueOf(user.getId());
//     }
//
//
//     jxl.write.Label labelC = new Label(j, i,str);
//     try {
//      // 将生成的单元格添加到工作表中
//      ws.addCell(labelC);
//     } catch (RowsExceededException e) {
//      e.printStackTrace();
//     } catch (WriteException e) {
//      e.printStackTrace();
//     }
//
//    }
//   }
//
//  }
//
//
//
//  /*
//   * 自定义单元格内样式；
//   */
//  // jxl.write.WritableFont wfc = new
//  // jxl.write.WritableFont(WritableFont.ARIAL, 10, WritableFont.BOLD,
//  // false,UnderlineStyle.NO_UNDERLINE);
//  // jxl.write.WritableCellFormat wcfFC = new
//  // jxl.write.WritableCellFormat(wfc);
//  //单元格加红
//  //wcfFC.setBackground(jxl.format.Colour.RED);
//  //labelC = new jxl.write.Label(6, 0, "中国爱我 ", wcfFC);
//
//
//
//  //ws.addCell(labelC);
//  // 写入Exel工作表
//  wwb.write();
//  // 关闭Excel工作薄对象
//  wwb.close();
//
// }

//new file ()

/**
     * 读取Excel
     *
     * @param filePath
     */
    public static void readExcel(String filePath)
    {
    String data2="";
    //DateTime tem=new DateTime("");
      SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
        try
        {
            InputStream is = new FileInputStream(filePath);
            Workbook rwb = Workbook.getWorkbook(is);
            //Sheet st = rwb.getSheet("0")这里有两种方法获取sheet表,1为名字，而为下标，从0开始
            Sheet st = rwb.getSheet("Sheet1");
            int rs=st.getColumns();
            int rows=st.getRows();
            System.out.println("列数===>"+rs+"行数："+rows);


            for(int k=0;k<rows;k++){//行
               for(int i=0 ;i<rs;i++){//列

                   Cell c00 = st.getCell(i,k);
            //通用的获取cell值的方式,返回字符串
            String strc00 = c00.getContents();
            //获得cell具体类型值的方式
            if(c00.getType() == CellType.LABEL)
            {
                LabelCell labelc00 = (LabelCell)c00;
                strc00 = labelc00.getString();
            }
            //excel 类型为时间类型处理;
            if(c00.getType()==CellType.DATE){
            DateCell dc=(DateCell)c00;
            strc00 = sdf.format(dc.getDate());

            }
            //excel 类型为数值类型处理;
            /*
            if(c00.getType()==CellType.NUMBER|| c00.getType()==CellType.NUMBER_FORMULA){
            NumberCell nc=(NumberCell)c00;
            strc00=""+nc.getValue();
            }*/

            //输出
            System.out.println(">"+strc00);

            list.add(strc00);


      //列，行
//      data2=String.valueOf(st.getCell(1,k).getContents());
//      data2=data2.replace("/", "-");
//           java.util.Date dt=sdf.parse(data2);
//           System.out.println(sdf.format(dt));
//
               }
   System.out.println(data2+"======"+list.get(k)+"=========");
       }


            //关闭
            rwb.close();
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }

    /**
     * 输出Excel
     *
     * @param os
     */
    public static void writeExcel(OutputStream os)
    {
        try
        {
            /**
             * 只能通过API提供的工厂方法来创建Workbook，而不能使用WritableWorkbook的构造函数，
             * 因为类WritableWorkbook的构造函数为protected类型
             * method(1)直接从目标文件中读取WritableWorkbook wwb = Workbook.createWorkbook(new File(targetfile));
             * method(2)如下实例所示将WritableWorkbook直接写入到输出流

             */
            WritableWorkbook wwb = Workbook.createWorkbook(os);
            //创建Excel工作表指定名称和位置
            WritableSheet ws = wwb.createSheet("Test Sheet 1",0);

//**************往工作表中添加数据*****************

            //1.添加Label对象
            Label label = new Label(0,0,"this is a label test");
            ws.addCell(label);

            //添加带有字型Formatting对象
            WritableFont wf = new WritableFont(WritableFont.TIMES,18,WritableFont.BOLD,true);
            WritableCellFormat wcf = new WritableCellFormat(wf);
            Label labelcf = new Label(1,0,"this is a label test",wcf);
            ws.addCell(labelcf);

            //添加带有字体颜色的Formatting对象
            WritableFont wfc = new WritableFont(WritableFont.ARIAL,10,WritableFont.NO_BOLD,false,
                    UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.RED);
            WritableCellFormat wcfFC = new WritableCellFormat(wfc);
            Label labelCF = new Label(1,0,"This is a Label Cell",wcfFC);
            ws.addCell(labelCF);

            //2.添加Number对象
            Number labelN = new Number(0,1,3.1415926);
            ws.addCell(labelN);

            //添加带有formatting的Number对象
            NumberFormat nf = new NumberFormat("#.##");
            WritableCellFormat wcfN = new WritableCellFormat(nf);
            Number labelNF = new jxl.write.Number(1,1,3.1415926,wcfN);
            ws.addCell(labelNF);

            //3.添加Boolean对象
            Boolean labelB = new jxl.write.Boolean(0,2,false);
            ws.addCell(labelB);

            //4.添加DateTime对象
            jxl.write.DateTime labelDT = new jxl.write.DateTime(0,3,new java.util.Date());
            ws.addCell(labelDT);

            //添加带有formatting的DateFormat对象
            DateFormat df = new DateFormat("dd MM yyyy hh:mm:ss");
            WritableCellFormat wcfDF = new WritableCellFormat(df);
            DateTime labelDTF = new DateTime(1,3,new java.util.Date(),wcfDF);
            ws.addCell(labelDTF);

//            //添加图片对象,jxl只支持png格式图片
//            File image = new File("d://2.png");
//            WritableImage wimage = new WritableImage(0,1,2,2,image);
//            ws.addImage(wimage);
            //写入工作表
            wwb.write();
            wwb.close();
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }

    /**
     * 拷贝后,进行修改,其中file1为被copy对象，file2为修改后创建的对象
     * 尽单元格原有的格式化修饰是不能去掉的，我们还是可以将新的单元格修饰加上去，
     * 以使单元格的内容以不同的形式表现
     * @param file1
     * @param file2
     */
    public static void modifyExcel(File file1,File file2)
    {
        try
        {
            Workbook rwb = Workbook.getWorkbook(file1);
            WritableWorkbook wwb = Workbook.createWorkbook(file2,rwb);//copy
            WritableSheet ws = wwb.getSheet(0);
            WritableCell wc = ws.getWritableCell(0,0);
            //判断单元格的类型,做出相应的转换
            if(wc.getType() == CellType.LABEL)
            {
                Label label = (Label)wc;
                label.setString("The value has been modified");
            }
            wwb.write();
            wwb.close();
            rwb.close();
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }

    //测试
    public static void main(String[] args)
    {
        try
        {
            //读Excel
        //ExcelTest.readExcel("C:/Users/Administrator/Desktop/student_info.xls");
            //输出Excel
            File fileWrite = new File("C:/Users/Administrator/Desktop/score.xls");
            fileWrite.createNewFile();
            OutputStream os = new FileOutputStream(fileWrite);
            ExcelTest.writeExcel(os);
            //修改Excel
          // excelTest.modifyExcel(new File(""),new File(""));
        }
        catch(Exception e)
        {
           e.printStackTrace();
        }
    }

}

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