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+"	");
                }
                
                System.out.println();
            }
            
        }
        
        
        
    }
}

输出的结果如下：