Java后台excel 导入 导出

package excle2;

public class Book {

private int id;
private String name;
private String type;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}

}

package excle2;

import java.io.File;

import java.io.IOException;

import java.util.ArrayList;

import jxl.Cell;

import jxl.Sheet;

import jxl.Workbook;

import jxl.read.biff.BiffException;

import jxl.write.Label;

import jxl.write.WritableSheet;

import jxl.write.WritableWorkbook;

import jxl.write.WriteException;

public class ExcelBook {

//将数据导出到Excel
public void excelOut(ArrayList<Book> arrayList) {
WritableWorkbook bWorkbook = null;
try {
// 创建Excel对象
bWorkbook = Workbook.createWorkbook(new File("D:/book.xls"));
// 通过Excel对象创建一个选项卡对象
WritableSheet sheet = bWorkbook.createSheet("sheet1", 0);
//使用循环将数据读出
for (int i = 0; i < arrayList.size(); i++) {
Book book=arrayList.get(i);
Label label=new Label(0,i,String.valueOf(book.getId()));
Label label1=new Label(1,i,String.valueOf(book.getName()));
Label label2=new Label(2,i,String.valueOf(book.getType()));
sheet.addCell(label);
sheet.addCell(label1);
sheet.addCell(label2);
}

// 创建一个单元格对象，第一个为列，第二个为行，第三个为值
Label label = new Label(0, 2, "test");
// 将创建好的单元格放入选项卡中
//sheet.addCell(label);
// 写如目标路径
bWorkbook.write();

} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
bWorkbook.close();
} catch (WriteException | IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}

//将Excel中的数据导入
public ArrayList<Book> ExcelIn(){
ArrayList<Book>arrayList=new ArrayList<Book>();
Workbook bWorkbook=null;
try {
bWorkbook=Workbook.getWorkbook(new File("D:/book.xls"));
Sheet sheet=bWorkbook.getSheet(0);
for (int i = 0; i < sheet.getRows(); i++) {
Book book=new Book();
//获取单元格对象
Cell cell =sheet.getCell(0,i);
//获取单元格的值
book.setId(Integer.valueOf(cell.getContents()));
book.setName(sheet.getCell(1,i).getContents());
book.setType(sheet.getCell(2, i).getContents() );
arrayList.add(book);

}

} catch (BiffException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally {
bWorkbook.close();
}
return arrayList;
}

public static void main(String[] args) {

//将数据导出到Excel中
ExcelBook book = new ExcelBook();

// ArrayList<Book> arrayList = new ArrayList<Book>();

// Book bo = new Book();

// bo.setId(1);

// bo.setName("酒馆");

// bo.setType("生活");

//

// Book bo1 = new Book();

// bo1.setId(2);

// bo1.setName("酒馆1");

// bo1.setType("生活1");

//

// arrayList.add(bo);

// arrayList.add(bo1);

// book.excelOut(arrayList);

//将数据从Excel中导入
ArrayList<Book> arrayList1 = book.ExcelIn();
for(Book bo2:arrayList1){
System.out.println(bo2.getName()+bo2.getType());
}
}

}