1、将excel导入到内存

1、 调用工作簿Workbook的静态方法getWorkbook(),获得工作簿Workbook对象

InputStream in = new FileInputStream(file);

Workbook wb = Workbook.getWorkbook(in);

2、 获取Excel表中的工作表格Sheet

3、 获取行、列

sheet.getRows();

sheet.getColumns();

4、 读取单元格内容

String result = cell.getContents();

5、 关闭工作簿Workbook

wb.close();

代码演示

// 实现读学生文件，将读出的信息存放于student集合中

public List ReadFromExcel(String fileName) {

List list = new ArrayList();

File file = new File(fileName);

try {

InputStream in = new FileInputStream(file);

Workbook wb = Workbook.getWorkbook(in);

Sheet s = wb.getSheet(0);

for(int i = 1; i < s.getRows(); i++) //第一行不要

{

Cell[] row = s.getRow(i);

Student student = new Student(row[0].getContents(), row[1].getContents(), //填充数据

row[2].getContents(), Float.parseFloat(row[3].getContents()),

Float.parseFloat(row[4].getContents()), Float.parseFloat(row[5].getContents()));

//由于读取的数据全部都是String 类型所以要转换成Float类型

student.setTotalScore(student.getEnglish()+student.getJava()+student.getMath());

student.setAverage(student.getTotalScore()/3);

list.add(student);

}

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (BiffException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return list;

}

2、将数据写到excel表格中

1、 获取可写入工作簿WritableWorkbook对象

WritableWorkbook wwb = Workbook.createWorkbook(filename);

2、 创建工作表格Sheet名称

WritableSheet sheet = book.createSheet("Sheet1",0);

3、 将内容放入对应的行和列

sheet.addCell(new Label(j, i, info);//j表示列，i表示行，info表示写入的内容

//在Excel中第一个参数是列，第二个参数是行，如A1

4、 写入并关闭工作簿Workbook

wwb.write();

wwb.close();

代码演示

// 将集合中的数据写入到excel文件中

public void WriteExcel(List list, String fileName) {

File file = new File(fileName);

try {

OutputStream out = new FileOutputStream(file);

WritableWorkbook wwb = Workbook.createWorkbook(out);

WritableSheet ws = wwb.createSheet("Sheet1", 0);

String info[] = {"id","name","gender","java","english","math"};

for(int j=0;j<6;j++){

Label label = new Label(j, 0, info[j]);

ws.addCell(label);

}

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

{

Label l = new Label(0, i+1, list.get(i).getId());//在Excel中，第一个参数表示列，第二个表示行

Label l2 = new Label(1, i+1, list.get(i).getName());

Label l3 = new Label(2, i+1, list.get(i).getGender());

Label l4 = new Label(3, i+1, String.valueOf(list.get(i).getJava()));

Label l5 = new Label(4, i+1, String.valueOf(list.get(i).getEnglish()));

Label l6 = new Label(5, i+1, String.valueOf(list.get(i).getMath()));

ws.addCell(l);

ws.addCell(l2);

ws.addCell(l3);

ws.addCell(l4);

ws.addCell(l5);

ws.addCell(l6);

}

wwb.write();//从内存中写入文件中

wwb.close();//关闭资源，释放内存

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (RowsExceededException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (WriteException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}