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。使用该API非Windows操作系统也可以通过纯Java应用来处理Excel数据表。因为是使用Java编写的,所以我们在Web应用中可以通过JSP、Servlet来调用API实现对Excel数据表的访问。
先倒入jxl.jar文件
以下是一个静态的测试类
package test;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Date;
import jxl.Cell;
import jxl.CellType;
import jxl.LabelCell;
import jxl.Sheet;
import jxl.Workbook;
import jxl.format.UnderlineStyle;
import jxl.write.Boolean;
import jxl.write.DateFormat;
import jxl.write.DateTime;
import jxl.write.Label;
import jxl.write.Number;
import jxl.write.NumberFormat;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
public class excelHandle {
/**
* 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);
Cell c00 = st.getCell(0, 0);
Cell c01 = st.getCell(0, 1);
Cell c10 = st.getCell(1, 0);
//通用的获取cell值的方法,返回字符串
String strc00 = c00.getContents();
String strc01 = c01.getContents();
String strc10 = c10.getContents();
//获取cell具体类型值的方法
if(c00.getType() == CellType.LABEL){
LabelCell labelc00 = (LabelCell)c00;
strc00 = labelc00.getString();
}
//输出
System.out.println(strc00);
System.out.println(strc01);
System.out.println(strc10);
//关闭
rwb.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 输出Excel
* @param os
*/
public static void writeExcel(OutputStream os){
try {
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);
//往工作表中添加数据
//添加label对象
Label label = new Label(0,0,"this is a label test");
ws.addCell(label);
//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 l 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 Boolean(0,2,false);
ws.addCell(labelB);
//4.添加DateTime对象
DateTime labelDT = new DateTime(0,3,new Date());
//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);
//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();
}
}
//测试
public static void main(String[] args) {
//读Excel
//excelHandle.readExcel("f:/1.xls");
//输出Excel
try {
File fileWrite = new File("f:/exl1.xls");
fileWrite.createNewFile();
OutputStream os = new FileOutputStream(fileWrite);
excelHandle.writeExcel(os);
} catch (IOException e) {
e.printStackTrace();
}
}
}