现在正在做的项目中涉及大量的Excel文件导出导入操作,都是使用Java

Excel来操作。

Java

Excel是一开放源码项目，通过它Java开发人员可以读取Excel文件的内容、创建新的Excel文件、更新已经存在的Excel文件。下面我写了一个简单的例子，展示基本的读取，新建，更新(包括常见格式的设置:字体，颜色，背景,合并单元格)，拷贝操作，有这些其实已经基本足够应付大部分问题了。下面是例的源代码:

import java.io.*;

import java.util.Date;

import jxl.*;

import jxl.format.Colour;

import jxl.format.UnderlineStyle;

import jxl.read.biff.BiffException;

import jxl.write.*;

import jxl.format.UnderlineStyle;

import jxl.format.CellFormat;;

public class OperateExcel {

public static void  readExcel(String

excelFileName){

Workbook  rwb = null;

try{

InputStream stream = new

FileInputStream(excelFileName);

rwb =

Workbook.getWorkbook(stream);

Sheet

sheet = rwb.getSheet(0);

Cell  cell  = null;

int columns =

sheet.getColumns();

int rows

=

sheet.getRows();

for( int i=0 ;

i< rows ; i++ )

for( int j=0 ;

j< columns ; j++){

//attention: The first parameter is column,the

second parameter is row.

cell =

sheet.getCell(j,i);

String

str00 = cell.getContents();

if(

cell.getType() == CellType.LABEL )

str00 += " LAEBL";

else

if( cell.getType() == CellType.NUMBER)

str00 += " number";

else

if( cell.getType() == CellType.DATE)

str00 += " date";

System.out.println("00==>"+str00);

}

stream.close();

}

catch(IOException e){

e.printStackTrace();

}

catch(BiffException

e){

e.printStackTrace();

}

finally{

rwb.close();

}

}

public static void createExcelFile(String

excelFileName){

try{

WritableWorkbook wwb =

Workbook.createWorkbook(new

File(excelFileName));

WritableSheet

ws  =

wwb.createSheet("sheet1",0);

//also,The first

parameter is  column,the second parameter is

row.

// add normal label

data

Label label00 = new

Label(0,0,"Label00");

ws.addCell(label00);

//add font formating data

WritableFont

wf = new WritableFont(WritableFont.TIMES, 18,

WritableFont.BOLD , true);

WritableCellFormat wff =

new WritableCellFormat(wf);

Label label10 = new

Label(1,0,"Label10",wff);

ws.addCell(label10);

//add color font

formating data

WritableFont wf_color =

new

WritableFont(WritableFont.ARIAL,10,WritableFont.NO_BOLD,false,UnderlineStyle.DOUBLE_ACCOUNTING,Colour.RED);

WritableCellFormat

wff_color = new

WritableCellFormat(wf_color);

wff_color.setBackground(Colour.GRAY_25); //set

background coloe to gray

Label label20 = new

Label(2,0,"Label20",wff_color);

ws.addCell(label20);

//合并单元格

WritableFont wf_merge =

new

WritableFont(WritableFont.ARIAL,10,WritableFont.NO_BOLD,false,UnderlineStyle.DOUBLE_ACCOUNTING,Colour.GREEN);

WritableCellFormat

wff_merge = new

WritableCellFormat(wf_merge);

wff_merge.setBackground(Colour.BLACK);

Label label30 = new

Label(3,0,"Label30",wff_merge);

ws.addCell(label30);

Label label40 = new

Label(4,0,"Label40");

ws.addCell(label40);

Label label50 = new

Label(5,0,"Label50");

ws.addCell(label50);

//合并

(0,3) (4,0)

//attention :

如果合并后面的列不为空,那么就把后面格的内容清空,格式也是按前一个单元格的格式

ws.mergeCells(3,0,4,0);

//添加Number格式数据

jxl.write.Number labelN =

new jxl.write.Number(0, 1, 3.1415926);

ws.addCell(labelN);

//添加带有formatting的Number对象

jxl.write.NumberFormat nf

= new jxl.write.NumberFormat("#.##");

jxl.write.WritableCellFormat wcfN = new

jxl.write.WritableCellFormat(nf);

jxl.write.Number labelNF

= new jxl.write.Number(1, 1, 3.1415926,

wcfN);

ws.addCell(labelNF);

//添加Boolean对象

jxl.write.Boolean

labelBoolean = new

jxl.write.Boolean(2,1,false);

ws.addCell(labelBoolean);

//添加DateTime对象

DateTime labelDT = new

DateTime(3,1,new Date());

ws.addCell(labelDT);

//添加带有格式的DataTime数据

DateFormat dtf = new

DateFormat("yyyy-MM-dd hh:mm:ss");

WritableCellFormat wcfDt

= new WritableCellFormat(dtf);

wcfDt.setBackground(Colour.YELLOW);

DateTime labelDT_format =

new DateTime(4,1,new

java.util.Date(),wcfDt);

ws.addCell(labelDT_format);

ws.mergeCells(4,1,5,1);

//比较长,用两列来显示

wwb.write();

wwb.close();

}

catch(IOException

e){

e.printStackTrace();

}

catch(WriteException

e){

e.printStackTrace();

}

}

public static void updateExcel(String fileName){

try{

jxl.Workbook rw =

jxl.Workbook.getWorkbook(new

File(fileName));

WritableWorkbook wwb =

Workbook.createWorkbook(new

File(fileName),rw);

//这里其实执行的是一次copy操作,把文件先读到内存中,修改后再保存覆盖原来的文件来实现update操作

WritableSheet ws

= wwb.getSheet(0);

WritableCell wc =

ws.getWritableCell(0,0);

if( wc.getType() ==

CellType.LABEL){

Label l =

(Label)wc;

l.setString(wc.getContents()+"_new");

}

wwb.write();

wwb.close();

}

catch(IOException

e){

e.printStackTrace();

}

catch(WriteException

e){

e.printStackTrace();

}

catch(BiffException

e){

e.printStackTrace();

}

}

public static void copyExcel(String sourFileName,String

destFileName){

try{

jxl.Workbook rw =

jxl.Workbook.getWorkbook(new

File(sourFileName));

WritableWorkbook wwb =

Workbook.createWorkbook(new

File(destFileName),rw);

wwb.write();

wwb.close();

}

catch(IOException

e){

e.printStackTrace();

}

catch(WriteException

e){

e.printStackTrace();

}

catch(BiffException

e){

e.printStackTrace();

}

}

public static void main(String []

argv){

//OperateExcel.readExcel("E:\test.xls");

//OperateExcel.createExcelFile("E:\test1.xls");

//OperateExcel.updateExcel("E:\test.xls");

OperateExcel.copyExcel("E:\test.xls","E:\moon.xls");

}

}

jxl读写excel常见操作搜集整理(转载) (2008-10-29

22:53:01)

标签：jxl excel 杂谈  分类：java

jxl读写excel常见操作搜集整理2008-04-23 17:26package

common.excelTool;

import java.io.File;

import java.io.FileOutputStream;

import java.io.OutputStream;

import java.util.ArrayList;

import java.util.Date;

import java.util.HashMap;

import jxl.Cell;

import jxl.CellType;

import jxl.DateCell;

import jxl.Range;

import jxl.Sheet;

import jxl.Workbook;

import jxl.WorkbookSettings;

import jxl.format.Alignment;

import jxl.format.Border;

import jxl.format.BorderLineStyle;

import jxl.format.CellFormat;

import jxl.format.Colour;

import jxl.format.UnderlineStyle;

import jxl.format.VerticalAlignment;

import jxl.write.Formula;

import jxl.write.Label;

import jxl.write.Number;

import jxl.write.NumberFormat;

import jxl.write.WritableCell;

import jxl.write.WritableCellFeatures;

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 WriteExcelTest {

static HashMap map = new HashMap();

public static void main(String[] args)

{

try

{

//  copyDateFormat(new

File("c:\a.xls"), 0, "c:\copy of a.xls");

//  writeExcelUseFormat("c:\format.xls","test");

//  buildNewFormTemplete(new

File("c:/templete.xls"),new File(

"c:/buildNewFormTemplete.xls"));

//  modifyDirectly1(new

File("c:/templete.xls"));

//  modifyDirectly2(new

File("c:/templete.xls"));

copyDateAndFormat(new

File("c:/a.xls"), 0, "c:/a2.xls");

} catch (Exception e)

{

// TODO 自动生成 catch

块

e.printStackTrace();

}

}

public static void modifyDirectly2(File inputFile) throws

Exception{

Workbook w1 =

Workbook.getWorkbook(inputFile);

WritableWorkbook w2 =

Workbook.createWorkbook(inputFile, w1);

WritableSheet sheet =

w2.getSheet(0);

WritableCell cell =

null;

CellFormat cf =

null;

//加粗

cell =

sheet.getWritableCell(0,0);

WritableFont bold = new

WritableFont(WritableFont.ARIAL,

WritableFont.DEFAULT_POINT_SIZE,

WritableFont.BOLD);

cf = new

WritableCellFormat(bold);

cell.setCellFormat(cf);

//设置下划线

cell =

sheet.getWritableCell(0,1);

WritableFont underline =

new WritableFont(WritableFont.ARIAL,

WritableFont.DEFAULT_POINT_SIZE,

WritableFont.NO_BOLD,

false,

UnderlineStyle.SINGLE);

cf = new

WritableCellFormat(underline);

cell.setCellFormat(cf);

//直截添加可以覆盖掉

setCellValueDirectly(sheet,sheet.getCell(0,

2),new Double(4),CellType.NUMBER);

w2.write();

w2.close();

}

public static void modifyDirectly1(File file)

{

try{

//

Excel获得文件

Workbook wb =

Workbook.getWorkbook(file);

//

打开一个文件的副本，并且指定数据写回到原文件

WritableWorkbook book =

Workbook.createWorkbook(file,

wb);

WritableSheet sheet0 =

book.getSheet(0);

sheet0.addCell(new

Label(0, 1, "陈小稳"));

//

添加一个工作表

WritableSheet sheet =

book.createSheet( " 第二页 " , 1 );

sheet.addCell( new

Label( 0 , 0 , " 第二页的测试数据 " ));

book.write();

book.close();

} catch (Exception e)

{

System.out.println(e);

}

}

public static void buildNewFormTemplete(File inputFile, File

outputFile){

try{

//

Excel获得文件

Workbook wb =

Workbook.getWorkbook(inputFile);

//

打开一个文件的副本，并且指定数据写回到原文件

WritableWorkbook book =

Workbook.createWorkbook(outputFile,

wb);

WritableSheet sheet0 =

book.getSheet(0);

sheet0.addCell(new

Label(0, 1, "陈小稳"));

//

添加一个工作表

WritableSheet sheet =

book.createSheet( " 第二页 " , 1 );

sheet.addCell( new

Label( 0 , 0 , " 第二页的测试数据 " ));

book.write();

book.close();

} catch (Exception e)

{

System.out.println(e);

}

}

public static void copyDateAndFormat(File inputFile, int

inputFileSheetIndex, String outputFilePath) throws Exception

{

Workbook book =

null;

Cell cell =

null;

//1.避免乱码的设置

WorkbookSettings setting

= new WorkbookSettings();

java.util.Locale locale =

new java.util.Locale("zh","CN");

setting.setLocale(locale);

setting.setEncoding("ISO-8859-1");

book =

Workbook.getWorkbook(inputFile, setting);

Sheet readonlySheet =

book.getSheet(inputFileSheetIndex);

OutputStream os=new

FileOutputStream(outputFilePath);//输出的Excel文件URL

WritableWorkbook wwb =

Workbook.createWorkbook(os);//创建可写工作薄

WritableSheet

writableSheet = wwb.createSheet(readonlySheet.getName(),

0);//创建可写工作表

//2.誊写不同数据格式的数据

for (int rowIndex = 0;

rowIndex < readonlySheet.getRows(); rowIndex++)

{

for (int colIndex = 0;

colIndex < readonlySheet.getColumns(); colIndex++)

{

cell =

readonlySheet.getCell(colIndex, rowIndex);

//A2B2为合并的单元格，A2有内容，B2为空

//  if(colIndex == 0

&& rowIndex ==

1){

//  System.out.println(colIndex + "," + rowIndex + "

type:" + cell.getType() +" :" +

cell.getContents());

//  }

//【有各种设置格式】

if(cell.getType() == CellType.DATE ||

cell.getType() == CellType.DATE_FORMULA){

writableSheet.addCell(

new jxl.write.DateTime(

colIndex

,

rowIndex

,

((DateCell)cell).getDate(),

new

jxl.write.WritableCellFormat(

cell.getCellFormat()

)

)

);

}else

if(cell.getType() == CellType.NUMBER || cell.getType() ==

CellType.NUMBER_FORMULA){

writableSheet.addCell(

new jxl.write.Number(

colIndex

,

rowIndex

,

((jxl.NumberCell)cell).getValue(),

new

jxl.write.WritableCellFormat(

cell.getCellFormat()

)

)

);

}else

if(cell.getType() == CellType.EMPTY){

//空的以及合并单元格中第一列外的

//  System.out.println("EMPTY:"+cell.getContents());

//  System.err.println("空单元格 at " + colIndex + "," +

rowIndex +" content:" +

cell.getContents());

}else

if(cell.getType() == CellType.LABEL || cell.getType() ==

CellType.STRING_FORMULA){

writableSheet.addCell(

new Label(

colIndex

,

rowIndex

,

cell.getContents()

, new

jxl.write.WritableCellFormat(

cell.getCellFormat()

)

)

);

}else{

System.err.println("其它单元格类型：" + cell.getType() + " at " + colIndex

+ "," + rowIndex +" content:" +

cell.getContents());

}

//  if(cell.getType() ==

CellType.STRING_FORMULA){

//  System.err.println(colIndex + "," + rowIndex +":" +

cell.getContents() +" type:" +

cell.getType());

//  }

}

}

//3.处理合并单元格的事情(复制合并单元格格式)

Range[] range =

readonlySheet.getMergedCells();

for (int i = 0; i

< range.length; i++) {

//  System.out.println("第"+i+"处合并的单元格:"

//  +",getTopLeft="+range[i].getTopLeft().getColumn()

//  +","+range[i].getTopLeft().getRow()

//  +",getBottomRight="+range[i].getBottomRight().getColumn()

//  +","+range[i].getBottomRight().getRow()

//  );

//topleftXIndex,

topleftYIndex, bottomRightXIndex,

bottomRightYIndex

writableSheet.mergeCells(

range[i].getTopLeft().getColumn(),

range[i].getTopLeft().getRow(),

range[i].getBottomRight().getColumn(),

range[i].getBottomRight().getRow()

);

}

//4.设置行列高宽

for (int colIndex = 0;

colIndex < readonlySheet.getColumns(); colIndex++)

{

writableSheet.setColumnView(colIndex,readonlySheet.getColumnView(colIndex));

}

for (int rowIndex = 0;

rowIndex < readonlySheet.getRows(); rowIndex++)

{

writableSheet.setRowView(rowIndex,readonlySheet.getRowView(rowIndex));

}

wwb.write();

wwb.close();

os.close();

}

public static void writeExcelUseFormat(String

outputFilePath,String outputFileSheetName) throws

Exception{

OutputStream os=new

FileOutputStream(outputFilePath);//输出的Excel文件URL

WritableWorkbook wwb =

Workbook.createWorkbook(os);//创建可写工作薄

WritableSheet sheet =

wwb.createSheet(outputFileSheetName,

0);//创建可写工作表

sheet.addCell(new

Label(0, 0, "号码"));

sheet.addCell(new

Label(1, 0, "有效期"));

//1.写入时间的数据格式

jxl.write.DateFormat df =

new jxl.write.DateFormat("yyyy-MM-dd");

jxl.write.WritableCellFormat wcfDF = new

jxl.write.WritableCellFormat(df);

jxl.write.DateTime

labelDTF = new jxl.write.DateTime(1, 1, new Date(), wcfDF);

//自定义格式

sheet.addCell(labelDTF);

//2.字体样式

//  WritableFont()方法里参数说明：

//  这个方法算是一个容器，可以放进去好多属性

//  第一个:

TIMES是字体大小，他写的是18

//  第二个:

BOLD是判断是否为斜体,选择true时为斜体

//  第三个: ARIAL

//  第四个: UnderlineStyle.NO_UNDERLINE

下划线

//  第五个: jxl.format.Colour.RED

字体颜色是红色的

jxl.write.WritableFont wf

= new jxl.write.WritableFont(WritableFont.TIMES, 18,

WritableFont.BOLD, true);

jxl.write.WritableCellFormat wcfF = new

jxl.write.WritableCellFormat(wf);

wcfF.setWrap(true);//自动换行

wcfF.setAlignment(jxl.format.Alignment.CENTRE);//把水平对齐方式指定为居中

wcfF.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);//把垂直对齐方式指定为居中

jxl.write.Label labelC =

new jxl.write.Label(0, 1, "This is a Label cell",

wcfF);

sheet.addCell(labelC);

//3.添加带有formatting的Number对象

jxl.write.NumberFormat nf

= new jxl.write.NumberFormat("#.##");

jxl.write.WritableCellFormat wcfN = new

jxl.write.WritableCellFormat(nf);

jxl.write.Number labelNF

= new jxl.write.Number(0, 2, 3.1415926,

wcfN);

sheet.addCell(labelNF);

//4.添加Boolean对象

jxl.write.Boolean labelB

= new jxl.write.Boolean(0, 3, false);

sheet.addCell(labelB);

//5.设置一个注解

WritableCellFeatures

cellFeatures = new WritableCellFeatures();

cellFeatures.setComment("添加Boolean对象");

labelB.setCellFeatures(cellFeatures);

//6.单元格内换行

WritableCellFormat

wrappedText = new WritableCellFormat

(WritableWorkbook.ARIAL_10_PT);

wrappedText.setWrap(true);//可换行的label样式

Label label = new

Label(4, 0, "测试, 12测试。。。",wrappedText); //

" 12"强制换行

sheet.addCell(label);

//7.数字的公式计算

Number n = new

jxl.write.Number(0,9,4.5);//A10

sheet.addCell(n);

n = new

Number(1,9,;//B10

sheet.addCell(n);

NumberFormat dp3 = new

NumberFormat("#.###"); //设置单元格里面的数字格式

WritableCellFormat

dp3cell = new WritableCellFormat(dp3);

dp3cell.setWrap(true);

Formula f = new

Formula(2, 9, "(a10+b10)/2", dp3cell);

//设置C10公式

sheet.addCell(f);

f = new Formula(3, 9,

"SUM(A10:B10)", dp3cell);//设置D10公式

sheet.addCell(f);

//8.设置sheet的样式

sheet.getSettings().setProtected(true);

//设置xls的保护，单元格为只读的

sheet.getSettings().setPassword("123");

//设置xls的密码

sheet.getSettings().setDefaultColumnWidth(10);

//设置列的默认宽度,2cm左右

sheet.setRowView(3,200);//设置第4行高度

sheet.setRowView(2,false);//

这样可以自动把行高扩展

sheet.setColumnView(0 ,

300);//设置第1列宽度，6cm左右

sheet.mergeCells(0 , 5,

1, 7);//合并单元格：合并A6B8也就是1列6行 与 2列7行 之间的矩形

//9.设置边框

drawRect(sheet, 5, 6, 7,

6,BorderLineStyle.THICK, Colour.BLACK,

null);

wwb.write();

wwb.close();

os.close();

}

public static void drawRect(WritableSheet sheet, int x, int y,

int width, int height,BorderLineStyle style,Colour BorderColor,

Colour bgColor) throws WriteException {

for(int w = 0; w

< width; w++){

for(int h = 0; h

< height; h ++) {

WritableCellFormat alignStyle = new

WritableCellFormat(); //单元格样式

alignStyle.setAlignment(Alignment.CENTRE);

//设置对齐方式

alignStyle.setVerticalAlignment(VerticalAlignment.CENTRE);//设置对齐方式

if(h

== 0)//画上

alignStyle.setBorder(Border.TOP, style,

BorderColor);//设置边框的颜色和样式

if(w

== 0)//画左

alignStyle.setBorder(Border.LEFT, style,

BorderColor);//设置边框的颜色和样式

if(w

== width - 1)//画右

alignStyle.setBorder(Border.RIGHT, style,

BorderColor);//设置边框的颜色和样式

if(h

== height -1)//画下

alignStyle.setBorder(Border.BOTTOM, style,

BorderColor);//设置边框的颜色和样式

//drawLine(sheet, x, y,

Border.BOTTOM);

if(bgColor != null)

alignStyle.setBackground(bgColor); //背静色

Label

mergelabel = new Label(x, y, "",

alignStyle);

//topleftXIndex, topleftYIndex,

bottomRightXIndex, bottomRightYIndex

//sheet.mergeCells(2, 5, 10,

10);

sheet.addCell(mergelabel);

y++;

}

y -=

height;

x++;

}

}

public static ArrayList

sampleReadExcel(File inputFile, int inputFileSheetIndex) throws

Exception {

ArrayList

list = new

ArrayList();

Workbook book =

null;

Cell cell =

null;

//避免乱码的设置

WorkbookSettings setting

= new WorkbookSettings();

java.util.Locale locale =

new java.util.Locale("zh","CN");

setting.setLocale(locale);

setting.setEncoding("ISO-8859-1");

book =

Workbook.getWorkbook(inputFile, setting);

Sheet sheet =

book.getSheet(inputFileSheetIndex);

for (int rowIndex = 0;

rowIndex < sheet.getRows(); rowIndex++) {//

Excel第一行为表头,因此J初值设为1

for (int colIndex = 0;

colIndex < sheet.getColumns(); colIndex++) {//

只需从Excel中取出2列

cell =

sheet.getCell(colIndex, rowIndex);

list.add(cell.getContents());

}

}

//【问题：如果在实际部署的时候没有写下面这句是否会导致不断消耗掉服务器的内存？jxl里面有个ReadWrite.java没有关闭读的，只关闭了写的】

book.close();

return

list;

}

public static void setCellValueDirectly(WritableSheet sheet,

Cell cell, Object newValue, CellType type) throws

Exception{

if(type == CellType.DATE

|| type == CellType.DATE_FORMULA){

sheet.addCell(

new

jxl.write.DateTime(

cell.getColumn()

, cell.getRow()

, (Date)newValue,

new

jxl.write.WritableCellFormat(

cell.getCellFormat()

)

)

);

}else if(type ==

CellType.NUMBER || type ==

CellType.NUMBER_FORMULA){

sheet.addCell(

new

jxl.write.Number(

cell.getColumn()

, cell.getRow()

,

((Double)newValue).doubleValue(),

new

jxl.write.WritableCellFormat(

cell.getCellFormat()

)

)

);

}else if(type ==

CellType.LABEL || type ==

CellType.STRING_FORMULA){

sheet.addCell(

new

Label(

cell.getColumn()

, cell.getRow()

, (String)newValue

, new

jxl.write.WritableCellFormat(

cell.getCellFormat()

)

)

);

}else{

throw new

Exception("不支持的其它单元格类型："+type);

//  System.err.println("不支持的其它单元格类型：" +

cell.getType() + " at " + cell.getColumn() + "," + cell.getRow() +"

current content:" + cell.getContents());

}

}