import jxl.*;

import jxl.format.UnderlineStyle;

import jxl.write.*;

import jxl.write.Number;

import jxl.write.Boolean;

import java.io.*;

class excel {

public excel() {

}

/**

* 读取excel

*

* @param filepath

*/

public static void readexcel(String filepath) {

try {

InputStream is = new FileInputStream(filepath);

Workbook rwb = Workbook.getWorkbook(is);

// sheet st = rwb.getsheet("0")这里有两种方法获取sheet表,1为名字，2为下标，从0开始

Sheet st = rwb.getSheet(0);

Cell c00 = st.getCell(1, 0);

// 通用的获取cell值的方式,返回字符串

String strc00 = c00.getContents();

// 获得cell具体类型值的方式

if (c00.getType() == CellType.LABEL) {

LabelCell labelc00 = (LabelCell) c00;

strc00 = labelc00.getString();

}

// 输出

System.out.println(strc00);

// 关闭

rwb.close();

} catch (Exception e) {

e.printStackTrace();

}

}

/**

* 输出excel

*

* @param os

*/

public static void writeexcel(OutputStream os) {

try {

/**

* 只能通过api提供的工厂方法来创建workbook，而不能使用WritableWorkbook的构造函数，

* 因为类WritableWorkbook的构造函数为protected类型

* method(1)直接从目标文件中读取WritableWorkbook wwb =

* workbook.createWorkbook(new file(targetfile)); method(2)如下实例所示

* 将WritableWorkbook直接写入到输出流

*

*/

WritableWorkbook wwb = Workbook.createWorkbook(os);

// 创建excel工作表 指定名称和位置

WritableSheet ws = wwb.createSheet("test sheet 1", 0);

WritableSheet ws2 = wwb.createSheet("test sheet 2", 1);

// **************往工作表中添加数据*****************

// 1.添加label对象

Label label = new Label(0, 0, "this is a label test");

ws.addCell(label);

Label label2 = new Label(0, 0, "this is a label test2");

ws2.addCell(label2);

// 添加带有字型formatting对象

WritableFont wf = new WritableFont(WritableFont.TIMES, 18,

WritableFont.BOLD, true);

WritableCellFormat wcf = new WritableCellFormat(wf);

Label labelcf = new Label(1, 0, "this is a label test", wcf);

ws.addCell(labelcf);

// 添加带有字体颜色的formatting对象

WritableFont wfc = new WritableFont(WritableFont.ARIAL, 10,

WritableFont.NO_BOLD, false, UnderlineStyle.NO_UNDERLINE,

jxl.format.Colour.RED);

WritableCellFormat wcffc = new WritableCellFormat(wfc);

Label Labelcf = new Label(1, 0, "this is a Label cell", wcffc);

ws.addCell(Labelcf);

// 2.添加number对象

Number Labeln = new Number(0, 1, 3.1415926);

ws.addCell(Labeln);

// 添加带有formatting的number对象

NumberFormat nf = new NumberFormat("#.##");

WritableCellFormat wcfn = new WritableCellFormat(nf);

Number Labelnf = new jxl.write.Number(1, 1, 3.1415926, wcfn);

ws.addCell(Labelnf);

// 3.添加boolean对象

Boolean Labelb = new jxl.write.Boolean(0, 2, false);

ws.addCell(Labelb);

// 4.添加datetime对象

jxl.write.DateTime Labeldt = new jxl.write.DateTime(0, 3,

new java.util.Date());

ws.addCell(Labeldt);

// 添加带有formatting的dateformat对象

DateFormat df = new DateFormat("dd mm yyyy hh:mm:ss");

WritableCellFormat wcfdf = new WritableCellFormat(df);

DateTime Labeldtf = new DateTime(1, 3, new java.util.Date(), wcfdf);

ws.addCell(Labeldtf);

// 添加图片对象,jxl只支持png格式图片

// File image = new File("f:\\2.png");

// WritableImage wimage = new WritableImage(0,1,2,2,image);

// ws.addImage(wimage);

// 写入工作表

wwb.write();

wwb.close();

} catch (Exception e) {

e.printStackTrace();

}

}

/**

* 拷贝后,进行修改,其中File1为被copy对象，File2为修改后创建的对象

* 尽单元格原有的格式化修饰是不能去掉的，我们还是可以将新的单元格修饰加上去， 以使单元格的内容以不同的形式表现

*

* @param File1

* @param File2

*/

public static void modifyexcel(File File1, File File2) {

try {

Workbook rwb = Workbook.getWorkbook(File1);

WritableWorkbook wwb = Workbook.createWorkbook(File2, rwb);// copy

WritableSheet ws = wwb.getSheet(0);

WritableCell wc = ws.getWritableCell(0, 0);

// 判断单元格的类型,做出相应的转换

if (wc.getType() == CellType.LABEL) {

Label Label = (Label) wc;

Label.setString("the value has been modified");

}

wwb.write();

wwb.close();

rwb.close();

} catch (Exception e) {

e.printStackTrace();

}

}