java 从Excel 输出和输入

本文实现了使用java 从数据库中获得对象，并存入集合中，

然后输出到Excel，并设置样式

 package com.webwork;

 import java.io.File;
 import java.io.IOException;
 import java.util.List;

 import org.jdom.output.Format;

 import jxl.Workbook;
 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 Jxls {
     public static void main(String[] args) {
         try {
             new Jxls().writeExcel();
         } catch (RowsExceededException e) {
             e.printStackTrace();
         } catch (WriteException e) {
             e.printStackTrace();
         } catch (IOException e) {
             e.printStackTrace();
         }
     }
     public void writeExcel() throws RowsExceededException, WriteException, IOException{
         new Jdbc().addList();
         List< Student> stuLists = Jdbc.getStuList();
         WritableWorkbook book =null;

              book = Workbook.createWorkbook(new File("e:/io/stuInfo.xls"));

         WritableSheet sheet =  book.createSheet("studentInfo", 0);

         /*
          * format设置样式
          */
         //设置字体
         WritableFont font1 = new WritableFont(WritableFont.ARIAL,18,WritableFont.BOLD);
         WritableFont font2 = new WritableFont(WritableFont.ARIAL, 13, WritableFont.BOLD);
         //格式化单元格
         WritableCellFormat format1 = new WritableCellFormat(font1);
         WritableCellFormat format2 = new WritableCellFormat(font2);
         WritableCellFormat format3 = new WritableCellFormat();
         //设置样式
         format1.setAlignment(jxl.format.Alignment.CENTRE);//水平对齐方式
         format1.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE); //垂直对齐方式
         format1.setBackground(jxl.format.Colour.LIGHT_BLUE);//设置背景颜色
         format1.setBorder(jxl.format.Border.ALL, jxl.format.BorderLineStyle.THIN);//设置边框

         //合并单元格第一行
         sheet.mergeCells(0, 0, 3, 0);
         Label label =  new Label(0, 0, "yc95全班信息表",format1);
         sheet.addCell(label);

         //设置每列小标题
         String [] str = {"id","name","sex","age"};
         for (int i = 0; i < str.length; i++) {
                 sheet.addCell(new Label(i, 1, str[i]));
                sheet.setColumnView(i, 20);//设置列宽
         }

         for (int i = 2; i < stuLists.size(); i++) {
             Student s = stuLists.get(i);
             //System.out.println(s);
             Label label1 = new Label(0,i ,s.getId());
             Label label2 = new Label(1,i, s.getName());
             Label label3 = new Label(2,i, s.getSex());
             Label label4 = new Label(3,i, s.getAge());
                     sheet.addCell(label1);
                     sheet.addCell(label2);
                     sheet.addCell(label3);
                     sheet.addCell(label4);
         }
             book.write();
             book.close();
         System.out.println("插入excel数据成功！！！");
     }
 }

下面是excel中得到的内容

输出到Excel后，相应的就是从Excel中去取数据

 package com.webwork;

 import java.io.File;
 import java.io.IOException;
 import java.util.List;

 import jxl.Cell;
 import jxl.Sheet;
 import jxl.Workbook;
 import jxl.read.biff.BiffException;

 public class ReadExcel {
     public static void main(String[] args) {
         List<Student> stuLists = Jdbc.getStuList();
         Workbook book = null;
         try {
             book  = Workbook.getWorkbook(new File("e:/io/stuInfo.xls"));
         } catch (BiffException e) {
             e.printStackTrace();
         } catch (IOException e) {
             e.printStackTrace();
         }
         Sheet[] sheets = book.getSheets();
         for (int i = 0; i < sheets.length; i++) {
             Sheet sheet = sheets[i];
             int rows=  sheet.getRows();
             for (int j = 1; j < rows; j++) {
                 Cell[] cells= sheet.getRow(j);
                 for (int k = 0; k < cells.length; k++) {
                     Cell cell = cells[k];
                     String id = cell.getContents();
                     System.out.print(id+"\t");
                 }

                 System.out.println();
             }

         }

     }
 }

输出的结果如下：