java中jxl导出数据到excel的例子

转载自：http://www.cnblogs.com/kkcheng/archive/2010/02/03/1662832.html

要往xls文件里面写入数据的时候需要注意的是第一要新建一个xls文件 
OutputStream os=new FileOutputStream("c:\\excel2.xls" ); 

再建完这个文件的时候再建立工作文件 
jxl.write.WritableWorkbook wwb = Workbook.createWorkbook(new File(os)); 

如果这个文件已经存在,那么我们可以在这个文件里面加入一个sheet为了和以前的数据进行分开; 
jxl.write.WritableSheet ws = wwb.createSheet("Test Sheet 1" , 0); 
在createSheet方法里前面的参数是sheet名，后面是要操作的sheet号 

接下来就可以往这个文件里面写入数据了 


写入数据的时候注意的格式 


（1）添加的字体样式 
jxl.write.WritableFont wf = new jxl.write.WritableFont(WritableFont.TIMES, 18, WritableFont.BOLD, true); 
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.WritableCellFormat wcfF = new jxl.write.WritableCellFormat(wf); 

jxl.write.Label labelC = new jxl.write.Label(0, 0, "This is a Label cell" ，wcfF); 
ws.addCell(labelC); 
在Label()方法里面有三个参数 
第一个是代表列数, 
第二是代表行数， 
第三个代表要写入的内容 
第四个是可选项，是输入这个label里面的样式 
然后通过写sheet的方法addCell（）把内容写进sheet里面。 

（2）添加带有formatting的Number对象 
jxl.write.NumberFormat nf = new jxl.write.NumberFormat("#.##" ); 


（3）添加Number对象 
（3.1）显示number对象数据的格式 

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); 
Number()方法参数说明: 
前两上表示输入的位置 
第三个表示输入的内容 


（4）添加Boolean对象 
jxl.write.Boolean labelB = new jxl.write.Boolean(0, 2, false); 
ws.addCell(labelB); 


（5）添加DateTime对象 
jxl.write.DateTime labelDT = new jxl.write.DateTime(0, 3, new java.util.Date()); 
ws.addCell(labelDT); 
DateTime()方法的参数说明 
前两个表示输入的位置 
第三个表示输入的当前时间 


（6）添加带有formatting的DateFormat对象 
这个显示当前时间的所有信息，包括年月日小时分秒 
jxl.write.DateFormat df = new jxl.write.DateFormat("dd MM yyyy hh:mm:ss" ); 
jxl.write.WritableCellFormat wcfDF = new jxl.write.WritableCellFormat(df); 
jxl.write.DateTime labelDTF = new jxl.write.DateTime(1, 3, new java.util.Date(), wcfDF); 
ws.addCell(labelDTF); 

（7）添加带有字体颜色Formatting的对象 
jxl.write.WritableFont wfc = new jxl.write.WritableFont(WritableFont.ARIAL, 10, WritableFont.NO_BOLD, false,UnderlineStyle.NO_UNDERLINE, jxl.format.Colour.RED); 
jxl.write.WritableCellFormat wcfFC = new jxl.write.WritableCellFormat(wfc); 

import="jxl.format.* 
jxl.write.WritableFont wfc = new jxl.write.WritableFont(WritableFont.ARIAL,20,WritableFont.BOLD,false,UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.GREEN); 

（8）设置单元格样式 

jxl.write.WritableCellFormat wcfFC = new jxl.write.WritableCellFormat(wfc); 
wcfFC.setBackGround(jxl.format.Colour.RED);//设置单元格的颜色为红色 
wcfFC = new jxl.write.Label(6,0,"i love china" ,wcfFC);

 

设置列宽： cw_sheet.setColumnView(0, 100);//第一个参数为第几列，第二个参数为列宽

设置行高： cw_sheet.setRowView(0, 1000);//第一个参数为第几行，第二个参数为行高

 

以下是部分例子：

 import  jxl.*;
import  jxl.write.*;
 import  java.io.*;
import  java.io.File.*;
 import  java.util.*;



 public   class  excel
{
 public   static   void  main(String[] args)
{

String targetfile = "c:/out.xls " ; //输出的excel文件名
 String worksheet = "List" ; //输出的excel文件工作表名
String[] title = {"ID" , "NAME" , "DESCRIB" }; //excel工作表的标题


 WritableWorkbook workbook;
try
 {
//创建可写入的Excel工作薄,运行生成的文件在tomcat/bin下
 //workbook = Workbook.createWorkbook(new File("output.xls"));
System.out.println("begin" );

OutputStream os=new  FileOutputStream(targetfile);
 workbook=Workbook.createWorkbook(os);

 WritableSheet sheet = workbook.createSheet(worksheet, 0 );  //添加第一个工作表
//WritableSheet sheet1 = workbook.createSheet("MySheet1", 1); //可添加第二个工作
 /*
jxl.write.Label label = new jxl.write.Label(0, 2, "A label record"); //put a label in cell A3, Label(column,row)
 sheet.addCell(label);
*/

jxl.write.Label label;
 for  ( int  i= 0 ; i<title.length; i++)
{
 //Label(列号,行号 ,内容 )
label = new  jxl.write.Label(i,  0 , title[i]);  //put the title in row1
 sheet.addCell(label);
}




 //下列添加的对字体等的设置均调试通过，可作参考用


//添加数字
 jxl.write.Number number = new  jxl.write.Number( 3 ,  4 ,  3.14159 );  //put the number 3.14159 in cell D5
sheet.addCell(number);

//添加带有字型Formatting的对象
 jxl.write.WritableFont wf = new  jxl.write.WritableFont(WritableFont.TIMES, 10 ,WritableFont.BOLD, true );
jxl.write.WritableCellFormat wcfF = new  jxl.write.WritableCellFormat(wf);
 jxl.write.Label labelCF = new  jxl.write.Label( 4 , 4 , "文本" ,wcfF);
sheet.addCell(labelCF);

//添加带有字体颜色,带背景颜色 Formatting的对象
 jxl.write.WritableFont wfc = new  jxl.write.WritableFont(WritableFont.ARIAL, 10 ,WritableFont.BOLD, false ,jxl.format.UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.RED);
jxl.write.WritableCellFormat wcfFC = new  jxl.write.WritableCellFormat(wfc);
 wcfFC.setBackground(jxl.format.Colour.BLUE);
jxl.write.Label labelCFC = new  jxl.write.Label( 1 , 5 , "带颜色" ,wcfFC);
 sheet.addCell(labelCFC);

 //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);
 sheet.addCell(labelNF);

 //3.添加Boolean对象
jxl.write.Boolean labelB = new  jxl.write.Boolean( 0 , 2 , false );
 sheet.addCell(labelB);

 //4.添加DateTime对象
jxl.write.DateTime labelDT = new  jxl.write.DateTime( 0 , 3 , new  java.util.Date());
 sheet.addCell(labelDT);

 //添加带有formatting的DateFormat对象
jxl.write.DateFormat df = new  jxl.write.DateFormat( "ddMMyyyyhh:mm:ss" );
 jxl.write.WritableCellFormat wcfDF = new  jxl.write.WritableCellFormat(df);
jxl.write.DateTime labelDTF = new  jxl.write.DateTime( 1 , 3 , new  java.util.Date(),wcfDF);
 sheet.addCell(labelDTF);

 //和宾单元格
//sheet.mergeCells(int col1,int row1,int col2,int row2);//左上角到右下角
 sheet.mergeCells(4 , 5 , 8 , 10 ); //左上角到右下角
wfc = new  jxl.write.WritableFont(WritableFont.ARIAL, 40 ,WritableFont.BOLD, false ,jxl.format.UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.GREEN);
 jxl.write.WritableCellFormat wchB = new  jxl.write.WritableCellFormat(wfc);
wchB.setAlignment(jxl.format.Alignment.CENTRE);
 labelCFC = new  jxl.write.Label( 4 , 5 , "单元合并" ,wchB);
sheet.addCell(labelCFC); //


 //设置边框
jxl.write.WritableCellFormat wcsB = new  jxl.write.WritableCellFormat();
 wcsB.setBorder(jxl.format.Border.ALL,jxl.format.BorderLineStyle.THICK);
labelCFC = new  jxl.write.Label( 0 , 6 , "边框设置" ,wcsB);
 sheet.addCell(labelCFC);
workbook.write();
 workbook.close();
}catch (Exception e)
 {
e.printStackTrace();
 }
System.out.println("end" );
 Runtime r=Runtime.getRuntime();
Process p=null ;
 //String cmd[]={"notepad","exec.java"};
String cmd[]={"C:\\Program Files\\Microsoft Office\\Office\\EXCEL.EXE" , "out.xls" };
 try {
p=r.exec(cmd);
 }
catch (Exception e){
 System.out.println("error executing: " +cmd[ 0 ]);
}


 }
}