JAVA读写EXCELE

package com.hr.dao;

import java.io.File;
import java.io.IOException;
import jxl.*;
import jxl.format.Colour;
import jxl.format.UnderlineStyle;
import jxl.read.biff.BiffException;
import jxl.Workbook;
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 JxlAdd {

public String jxlAdd(File filename, File tofile) throws IOException,
BiffException, RowsExceededException, WriteException {
StringBuffer sb = new StringBuffer();
WritableWorkbook wwb = Workbook.createWorkbook(tofile);
WritableSheet ws = wwb.createSheet("test", 0);
WritableFont wf = new WritableFont(WritableFont.TAHOMA, 20,
WritableFont.BOLD, true, UnderlineStyle.SINGLE,
jxl.format.Colour.DARK_BLUE);
// 第一个: TIMES是字体大小(ARIAL字体名称)，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:
// UnderlineStyle.NO_UNDERLINE 下划线 第四个: jxl.format.Colour.RED 字体颜色是红色的

WritableCellFormat wcfF = new WritableCellFormat(wf);
wcfF.setBackground(Colour.BLUE); // 设置单元格背景色
Workbook wb = Workbook.getWorkbook(filename);
Cell[] cell = null;
// String read=null;
Double read = null;
int rowNum = 0;

if (wb == null)
return null;
Sheet[] sheet = wb.getSheets();
if (sheet != null && sheet.length > 0) {
for (int i = 0; i < sheet.length; i++) {
rowNum = sheet[i].getRows();
for (int j = 0; j < rowNum; j++) {
cell = sheet[i].getRow(j);
if (cell != null && cell.length > 0) {
for (int k = 0; k < cell.length; k++) {
// System.out.println(rowNum);
if (cell[k].getContents() != "") {
read = new Double(cell[k].getContents());//输出数值型
}
// System.out.println(cell[k].getContents());//输出字符型
// Label label = new Label(k, j,read,wcfF);//第四个是可选项，是输入这个label里面的样式
jxl.write.Number label = new jxl.write.Number(k, j,
read, wcfF); // 输出数字型格式
ws.addCell(label);
sb.append("");// 连接字符串
}
}
sb.append("");
}
sb.append("");
}
}
wwb.write();
try {
wwb.close();
} catch (WriteException e) {
e.printStackTrace();
}
wb.close();
System.out.println("成功");
return wb.toString();
}
}

package com.hr.dao;

import java.io.File;
import java.io.IOException;
import jxl.read.biff.BiffException;
import jxl.write.WriteException;
import jxl.write.biff.RowsExceededException;

public class test {
public static void main(String[] args) {
JxlAdd jxladd=new JxlAdd();
File filename=new File("D:/jxltest.xls");
File tofile=new File("E:/jxltest.xls");
try {
jxladd.jxlAdd(filename, tofile);
} catch (IOException e) {
e.printStackTrace();
} catch (RowsExceededException e) {
e.printStackTrace();
} catch (BiffException e) {
e.printStackTrace();
} catch (WriteException e) {
e.printStackTrace();
}

}

}