java生成Excel及操作Excel

JAVA EXCEL API: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。因为它是使用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。

下载:

官方网站 http://www.andykhan.com/jexcelapi/ 下载最新版本(本人下的是jexcelapi_2_6_12.tar.gz,解压后将里面的jxl.jar复制到WEB-INF/lib目录下面即可)

Java Excel API的jar包可以通过以下URL获得:

http://sourceforge.net/projects/jexcelapi/files/jexcelapi/2.6.6/jexcelapi_2_6_6.zip/download

(包括所有版本):http://sourceforge.net/projects/jexcelapi/files/

直接下载地址(迅雷上新建任务即可):

http://nchc.dl.sourceforge.net/project/jexcelapi/jexcelapi/2.6.6/jexcelapi_2_6_6.zip 

一、JSP生成简单的Excel文件

package beans.excel;

import java.io.IOException;
import java.io.OutputStream;

import jxl.Workbook;
import jxl.write.Label;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;

public class SimpleExcelWrite {
    public void createExcel(OutputStream os) throws WriteException,IOException{
        //创建工作薄
        WritableWorkbook workbook = Workbook.createWorkbook(os);
        //创建新的一页
        WritableSheet sheet = workbook.createSheet("First Sheet",0);
        //创建要显示的内容,创建一个单元格,第一个参数为列坐标,第二个参数为行坐标,第三个参数为内容
        Label xuexiao = new Label(0,0,"学校");
        sheet.addCell(xuexiao);
        Label zhuanye = new Label(1,0,"专业");
        sheet.addCell(zhuanye);
        Label jingzhengli = new Label(2,0,"专业竞争力");
        sheet.addCell(jingzhengli);
        
        Label qinghua = new Label(0,1,"清华大学");
        sheet.addCell(qinghua);
        Label jisuanji = new Label(1,1,"计算机专业");
        sheet.addCell(jisuanji);
        Label gao = new Label(2,1,"高");
        sheet.addCell(gao);
        
        Label beida = new Label(0,2,"北京大学");
        sheet.addCell(beida);
        Label falv = new Label(1,2,"法律专业");
        sheet.addCell(falv);
        Label zhong = new Label(2,2,"中");
        sheet.addCell(zhong);
        
        Label ligong = new Label(0,3,"北京理工大学");
        sheet.addCell(ligong);
        Label hangkong = new Label(1,3,"航空专业");
        sheet.addCell(hangkong);
        Label di = new Label(2,3,"低");
        sheet.addCell(di);
        
        //把创建的内容写入到输出流中,并关闭输出流
        workbook.write();
        workbook.close();
        os.close();
    }
    
}
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<%@ page import="java.io.*" %>
<%@ page import="beans.excel.*" %>
<% 
    String fname = "学校竞争力情况";
    OutputStream os = response.getOutputStream();//取得输出流
    response.reset();//清空输出流
    
    //下面是对中文文件名的处理
    response.setCharacterEncoding("UTF-8");//设置相应内容的编码格式
    fname = java.net.URLEncoder.encode(fname,"UTF-8");
    response.setHeader("Content-Disposition","attachment;filename="+new String(fname.getBytes("UTF-8"),"GBK")+".xls");
    response.setContentType("application/msexcel");//定义输出类型
    SimpleExcelWrite sw = new SimpleExcelWrite();
    sw.createExcel(os);

 %>
<html>
  <head>
    
    <title></title>

  </head>
  
  <body>
  </body>
</html>

生成复杂格式的Excel

package beans.excel;

import java.io.IOException;
import java.io.OutputStream;
import java.util.Calendar;
import java.util.Date;

import jxl.Workbook;
import jxl.write.Boolean;
import jxl.write.DateFormats;
import jxl.write.DateTime;
import jxl.write.Label;
import jxl.write.Number;
import jxl.write.WritableCellFormat;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;

public class ComplexDataExcelWrite {
    public void createExcel(OutputStream os) throws WriteException,IOException {
        //创建工作薄
        WritableWorkbook workbook = Workbook.createWorkbook(os);
        //创建新的一页
        WritableSheet sheet = workbook.createSheet("First Sheet", 0);
        //创建要显示的具体内容
        Label formate = new Label(0,0,"数据格式");
        sheet.addCell(formate);
        Label floats = new Label(1,0,"浮点型");
        sheet.addCell(floats);
        Label integers = new Label(2,0,"整型");
        sheet.addCell(integers);
        Label booleans = new Label(3,0,"布尔型");
        sheet.addCell(booleans);
        Label dates = new Label(4,0,"日期格式");
        sheet.addCell(dates);
        
        Label example = new Label(0,1,"数据示例");
        sheet.addCell(example);
        //浮点数据
        Number number = new Number(1,1,3.1415926535);
        sheet.addCell(number);
        //整形数据
        Number ints = new Number(2,1,15042699);
        sheet.addCell(ints);
        Boolean bools = new Boolean(3,1,true);
        sheet.addCell(bools);
        //日期型数据
        Calendar c = Calendar.getInstance();
        Date date = c.getTime();
        WritableCellFormat cf1 = new WritableCellFormat(DateFormats.FORMAT1);
        DateTime dt = new DateTime(4,1,date,cf1);
        sheet.addCell(dt);
        //把创建的内容写入到输出流中,并关闭输出流
        workbook.write();
        workbook.close();
        os.close();
        
    }
}

 三、生成复杂布局和样式的Excel文件

package beans.excel;

import java.io.IOException;
import java.io.OutputStream;
import java.util.Calendar;
import java.util.Date;

import jxl.Workbook;
import jxl.format.Colour;
import jxl.format.UnderlineStyle;
import jxl.write.Boolean;
import jxl.write.DateFormats;
import jxl.write.DateTime;
import jxl.write.Label;
import jxl.write.Number;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;

public class MutiStyleExcelWrite {
    public void createExcel(OutputStream os) throws WriteException,IOException {
        //创建工作薄
        WritableWorkbook workbook = Workbook.createWorkbook(os);
        //创建新的一页
        WritableSheet sheet = workbook.createSheet("First Sheet", 0);
        //构造表头
        sheet.mergeCells(0, 0, 4, 0);//添加合并单元格,第一个参数是起始列,第二个参数是起始行,第三个参数是终止列,第四个参数是终止行
        WritableFont bold = new WritableFont(WritableFont.ARIAL,10,WritableFont.BOLD);//设置字体种类和黑体显示,字体为Arial,字号大小为10,采用黑体显示
        WritableCellFormat titleFormate = new WritableCellFormat(bold);//生成一个单元格样式控制对象
        titleFormate.setAlignment(jxl.format.Alignment.CENTRE);//单元格中的内容水平方向居中
        titleFormate.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);//单元格的内容垂直方向居中
        Label title = new Label(0,0,"JExcelApi支持数据类型详细说明",titleFormate);
        sheet.setRowView(0, 600, false);//设置第一行的高度
        sheet.addCell(title);
        
        //创建要显示的具体内容
        WritableFont color = new WritableFont(WritableFont.ARIAL);//选择字体
        color.setColour(Colour.GOLD);//设置字体颜色为金黄色
        WritableCellFormat colorFormat = new WritableCellFormat(color);
        Label formate = new Label(0,1,"数据格式",colorFormat);
        sheet.addCell(formate);
        Label floats = new Label(1,1,"浮点型");
        sheet.addCell(floats);
        Label integers = new Label(2,1,"整型");
        sheet.addCell(integers);
        Label booleans = new Label(3,1,"布尔型");
        sheet.addCell(booleans);
        Label dates = new Label(4,1,"日期格式");
        sheet.addCell(dates);
        
        Label example = new Label(0,2,"数据示例",colorFormat);
        sheet.addCell(example);
        //浮点数据
        //设置下划线
        WritableFont underline= new WritableFont(WritableFont.ARIAL,WritableFont.DEFAULT_POINT_SIZE,WritableFont.NO_BOLD,false,UnderlineStyle.SINGLE);
        WritableCellFormat greyBackground = new WritableCellFormat(underline);
        greyBackground.setBackground(Colour.GRAY_25);//设置背景颜色为灰色
        Number number = new Number(1,2,3.1415926535,greyBackground);
        sheet.addCell(number);
        //整形数据
        WritableFont boldNumber = new WritableFont(WritableFont.ARIAL,10,WritableFont.BOLD);//黑体
        WritableCellFormat boldNumberFormate = new WritableCellFormat(boldNumber);
        Number ints = new Number(2,2,15042699,boldNumberFormate);
        sheet.addCell(ints);
        //布尔型数据
        Boolean bools = new Boolean(3,2,true);
        sheet.addCell(bools);
        //日期型数据
        //设置黑体和下划线
        WritableFont boldDate = new WritableFont(WritableFont.ARIAL,WritableFont.DEFAULT_POINT_SIZE,WritableFont.BOLD,false,UnderlineStyle.SINGLE);
        WritableCellFormat boldDateFormate = new WritableCellFormat(boldDate,DateFormats.FORMAT1);
        Calendar c = Calendar.getInstance();
        Date date = c.getTime();
        DateTime dt = new DateTime(4,2,date,boldDateFormate);
        sheet.addCell(dt);
        //把创建的内容写入到输出流中,并关闭输出流
        workbook.write();
        workbook.close();
        os.close();
        
    }
}

 四、JSP读取Excel报表

<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<%@ page import="java.io.File" %>
<%@ page import="jxl.Cell" %>
<%@ page import="jxl.Sheet" %>
<%@ page import="jxl.Workbook" %>
<html>
  <head>
    <title></title>
  </head>
  <body>
    <font size="2">
    <%
        String fileName = "D:/学校竞争力情况.xls";
        File file = new File(fileName);//根据文件名创建一个文件对象
        Workbook wb = Workbook.getWorkbook(file);//从文件流中取得Excel工作区对象
        Sheet sheet = wb.getSheet(0);//从工作区中取得页,取得这个对象的时候既可以用名称来获得,也可以用序号。
        String outPut = "";
        
        outPut = outPut + "<b>" + fileName + "</b><br>";
        outPut = outPut + "第一个sheet的名称为:" + sheet.getName() + "<br>";
        outPut = outPut + "第一个sheet共有:" + sheet.getRows() + "行" + sheet.getColumns() + "列<br>";
        outPut = outPut + "具体内容如下:<br>";
        for(int i=0; i < sheet.getRows(); i++){
            for(int j=0; j < sheet.getColumns(); j++){
                Cell cell = sheet.getCell(j,i);
                outPut = outPut + cell.getContents() + " ";
            }
            outPut = outPut + "<br>";
        }
        out.println(outPut);
     %>
     </font>
  </body>
</html>

示例1:读取本地Excel文件F:\红楼人物.xls

1.       新建Excel文件F:\红楼人物.xls

内容如下:

 

2.       Java通过jexcelapi包操作excel文件:

  1 //in ExcelOperater   
  2   
  3 import java.io.File;   
  4   
  5 import java.io.FileInputStream;   
  6   
  7 import java.io.InputStream;   
  8   
  9     
 10   
 11 import jxl.Cell;   
 12   
 13 import jxl.CellType;   
 14   
 15 import jxl.Sheet;   
 16   
 17 import jxl.Workbook;   
 18   
 19 import jxl.write.Label;   
 20   
 21     
 22   
 23 public class ExcelOperater    
 24   
 25 {   
 26   
 27     public static void main(String[] args)    
 28   
 29     {   
 30   
 31         jxl.Workbook readwb = null;   
 32   
 33         try    
 34   
 35         {   
 36   
 37             //构建Workbook对象, 只读Workbook对象   
 38   
 39             //直接从本地文件创建Workbook   
 40   
 41             InputStream instream = new FileInputStream("F:/红楼人物.xls");   
 42   
 43             readwb = Workbook.getWorkbook(instream);   
 44   
 45     
 46   
 47             //Sheet的下标是从0开始   
 48   
 49             //获取第一张Sheet表   
 50   
 51             Sheet readsheet = readwb.getSheet(0);   
 52   
 53             //获取Sheet表中所包含的总列数   
 54   
 55             int rsColumns = readsheet.getColumns();   
 56   
 57             //获取Sheet表中所包含的总行数   
 58   
 59             int rsRows = readsheet.getRows();   
 60   
 61             //获取指定单元格的对象引用   
 62   
 63             for (int i = 0; i < rsRows; i++)   
 64   
 65             {   
 66   
 67                 for (int j = 0; j < rsColumns; j++)   
 68   
 69                 {   
 70   
 71                     Cell cell = readsheet.getCell(j, i);   
 72   
 73                     System.out.print(cell.getContents() + " ");   
 74   
 75                 }   
 76   
 77                 System.out.println();   
 78   
 79             }   
 80   
 81                
 82   
 83             //利用已经创建的Excel工作薄,创建新的可写入的Excel工作薄   
 84   
 85             jxl.write.WritableWorkbook wwb = Workbook.createWorkbook(new File(   
 86   
 87                     "F:/红楼人物1.xls"), readwb);   
 88   
 89             //读取第一张工作表   
 90   
 91             jxl.write.WritableSheet ws = wwb.getSheet(0);   
 92   
 93             //获得第一个单元格对象   
 94   
 95             jxl.write.WritableCell wc = ws.getWritableCell(0, 0);   
 96   
 97             //判断单元格的类型, 做出相应的转化   
 98   
 99             if (wc.getType() == CellType.LABEL)    
100   
101             {   
102   
103                 Label l = (Label) wc;   
104   
105                 l.setString("新姓名");   
106   
107             }   
108   
109             //写入Excel对象   
110   
111             wwb.write();   
112   
113             wwb.close();   
114   
115         } catch (Exception e) {   
116   
117             e.printStackTrace();   
118   
119         } finally {   
120   
121             readwb.close();   
122   
123         }   
124   
125 }   
126   
127 }  

3.       结果:

①     控制台输出:

人物 等级 大观园位置 金陵十二钗

林黛玉 小姐 潇湘馆 正册

妙玉 世外 栊翠庵 正册

晴雯 丫鬟 怡红院 副册

香菱 妾 蘅芜苑 又副册

②     创建文件F:\红楼人物1.xls

 

4.       程序解析:

所引用的包:

①     Workbook对象,需要jxl.Workbook包;

②     InputStream、FileInputStream对象:需要java.io.FileInputStream和java.io.InputStream包。

③     Sheet对象:jxl.Sheet包;注意excel中sheet表单的行列从0开始计数。

④     Cell对象:jxl.Cell包;对单元进行处理

⑤     Label:选择jxl.write.label包

⑥     WritableWorkbook、WritableSheet、WritableCelll对象

实例二:3个功能-----从excel文件F:\红楼人物.xls读取数据;生成新的excel文件F:\红楼人物2.xls;修改原excel一个单元并输出为F:\红楼人物3.xls。

原始文件:F:\红楼人物.xls

 

运行结果:

①     控制台输出:

人物 等级 大观园位置 金陵十二钗

林黛玉 小姐 潇湘馆 正册

妙玉 世外 栊翠庵 正册

晴雯 丫鬟 怡红院 副册

香菱 妾 蘅芜苑 又副册

②     写入输出Excel文件:F:\红楼人物2.xls

 

③     修改输出文件 F:\红楼人物3.xls (加修饰后输出)

示例程序:

  1 //in ExcelHandle   
  2   
  3 import jxl.*;   
  4   
  5 import jxl.format.UnderlineStyle;   
  6   
  7 import jxl.write.*;   
  8   
  9 import jxl.write.Number;   
 10   
 11 import jxl.write.Boolean;   
 12   
 13 import jxl.Cell;   
 14   
 15     
 16   
 17 import java.io.*;   
 18   
 19     
 20   
 21 public class ExcelHandle   
 22   
 23 {   
 24   
 25     public ExcelHandle()   
 26   
 27     {   
 28   
 29     }   
 30   
 31     /***读取Excel*/  
 32   
 33     public static void readExcel(String filePath)   
 34   
 35     {   
 36   
 37         try  
 38   
 39         {   
 40   
 41             InputStream is = new FileInputStream(filePath);   
 42   
 43             Workbook rwb = Workbook.getWorkbook(is);   
 44   
 45             //这里有两种方法获取sheet表:名字和下标(从0开始)   
 46   
 47             //Sheet st = rwb.getSheet("original");   
 48   
 49             Sheet st = rwb.getSheet(0);   
 50   
 51             /**  
 52  
 53             //获得第一行第一列单元的值  
 54  
 55             Cell c00 = st.getCell(0,0);  
 56  
 57             //通用的获取cell值的方式,返回字符串  
 58  
 59             String strc00 = c00.getContents();  
 60  
 61             //获得cell具体类型值的方式  
 62  
 63             if(c00.getType() == CellType.LABEL)  
 64  
 65             {  
 66  
 67                 LabelCell labelc00 = (LabelCell)c00;  
 68  
 69                 strc00 = labelc00.getString();  
 70  
 71             }  
 72  
 73             //输出  
 74  
 75             System.out.println(strc00);*/  
 76   
 77             //Sheet的下标是从0开始   
 78   
 79             //获取第一张Sheet表   
 80   
 81             Sheet rst = rwb.getSheet(0);   
 82   
 83             //获取Sheet表中所包含的总列数   
 84   
 85             int rsColumns = rst.getColumns();   
 86   
 87             //获取Sheet表中所包含的总行数   
 88   
 89             int rsRows = rst.getRows();   
 90   
 91             //获取指定单元格的对象引用   
 92   
 93             for (int i = 0; i < rsRows; i++)   
 94   
 95             {   
 96   
 97                 for (int j = 0; j < rsColumns; j++)   
 98   
 99                 {   
100   
101                     Cell cell = rst.getCell(j, i);   
102   
103                     System.out.print(cell.getContents() + " ");   
104   
105                 }   
106   
107                 System.out.println();   
108   
109             }             
110   
111             //关闭   
112   
113             rwb.close();   
114   
115         }   
116   
117         catch(Exception e)   
118   
119         {   
120   
121             e.printStackTrace();   
122   
123         }   
124   
125     }   
126   
127     /**输出Excel*/  
128   
129     public static void writeExcel(OutputStream os)   
130   
131     {   
132   
133         try  
134   
135         {   
136   
137    /** 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:方法一:直接从目标文件中读取 WritableWorkbook wwb = Workbook.createWorkbook(new File(targetfile));方法 二:如下实例所示 将WritableWorkbook直接写入到输出流*/  
138   
139             WritableWorkbook wwb = Workbook.createWorkbook(os);   
140   
141             //创建Excel工作表 指定名称和位置   
142   
143             WritableSheet ws = wwb.createSheet("Test Sheet 1",0);   
144   
145             /**************往工作表中添加数据*****************/  
146   
147             //1.添加Label对象   
148   
149             Label label = new Label(0,0,"测试");   
150   
151             ws.addCell(label);   
152   
153             //添加带有字型Formatting对象   
154   
155             WritableFont wf = new WritableFont(WritableFont.TIMES,18,WritableFont.BOLD,true);   
156   
157             WritableCellFormat wcf = new WritableCellFormat(wf);   
158   
159             Label labelcf = new Label(1,0,"this is a label test",wcf);   
160   
161             ws.addCell(labelcf);   
162   
163             //添加带有字体颜色的Formatting对象   
164   
165             WritableFont wfc = new WritableFont(WritableFont.ARIAL,10,WritableFont.NO_BOLD,false,   
166   
167                     UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.DARK_YELLOW);   
168   
169             WritableCellFormat wcfFC = new WritableCellFormat(wfc);   
170   
171             Label labelCF = new Label(1,0,"Ok",wcfFC);   
172   
173             ws.addCell(labelCF);   
174   
175               
176   
177             //2.添加Number对象   
178   
179             Number labelN = new Number(0,1,3.1415926);   
180   
181             ws.addCell(labelN);   
182   
183             //添加带有formatting的Number对象   
184   
185             NumberFormat nf = new NumberFormat("#.##");   
186   
187             WritableCellFormat wcfN = new WritableCellFormat(nf);   
188   
189             Number labelNF = new jxl.write.Number(1,1,3.1415926,wcfN);   
190   
191             ws.addCell(labelNF);   
192   
193                
194   
195             //3.添加Boolean对象   
196   
197             Boolean labelB = new jxl.write.Boolean(0,2,true);   
198   
199             ws.addCell(labelB);   
200   
201             Boolean labelB1 = new jxl.write.Boolean(1,2,false);   
202   
203             ws.addCell(labelB1);             
204   
205             //4.添加DateTime对象   
206   
207             jxl.write.DateTime labelDT = new jxl.write.DateTime(0,3,new java.util.Date());   
208   
209             ws.addCell(labelDT);   
210   
211               
212   
213             //5.添加带有formatting的DateFormat对象   
214   
215             DateFormat df = new DateFormat("dd MM yyyy hh:mm:ss");   
216   
217             WritableCellFormat wcfDF = new WritableCellFormat(df);   
218   
219             DateTime labelDTF = new DateTime(1,3,new java.util.Date(),wcfDF);   
220   
221             ws.addCell(labelDTF);   
222   
223             //6.添加图片对象,jxl只支持png格式图片   
224   
225             File image = new File("f:\\1.png");   
226   
227             WritableImage wimage = new WritableImage(0,4,6,17,image);   
228   
229             ws.addImage(wimage);   
230   
231             //7.写入工作表   
232   
233             wwb.write();   
234   
235             wwb.close();   
236   
237         }   
238   
239         catch(Exception e)   
240   
241         {   
242   
243             e.printStackTrace();   
244   
245         }   
246   
247     }   
248   
249     /** 将file1拷贝后,进行修改并创建输出对象file2  
250  
251      * 单元格原有的格式化修饰不能去掉,但仍可将新的单元格修饰加上去,  
252  
253      * 以使单元格的内容以不同的形式表现  
254  
255      */  
256   
257     public static void modifyExcel(File file1,File file2)   
258   
259     {   
260   
261         try  
262   
263         {   
264   
265             Workbook rwb = Workbook.getWorkbook(file1);   
266   
267             WritableWorkbook wwb = Workbook.createWorkbook(file2,rwb);//copy   
268   
269             WritableFont wfc = new WritableFont(WritableFont.ARIAL,10,WritableFont.NO_BOLD,false,   
270   
271                     UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.BLUE);   
272   
273             WritableCellFormat wcfFC = new WritableCellFormat(wfc);    
274   
275             WritableSheet ws = wwb.getSheet(0);   
276   
277             WritableCell wc = ws.getWritableCell(0,0);   
278   
279             //判断单元格的类型,做出相应的转换   
280   
281             if(wc.getType() == CellType.LABEL)   
282   
283             {   
284   
285                 Label labelCF =new Label(0,0,"人物(新)",wcfFC);   
286   
287                 ws.addCell(labelCF);     
288   
289               //Label label = (Label)wc;   
290   
291               //label.setString("被修改");   
292   
293             }   
294   
295           wwb.write();   
296   
297             wwb.close();   
298   
299             rwb.close();   
300   
301         }   
302   
303         catch(Exception e)   
304   
305         {   
306   
307             e.printStackTrace();   
308   
309         }   
310   
311     }   
312   
313     //测试   
314   
315     public static void main(String args[])   
316   
317     {   
318   
319         try  
320   
321         {   
322   
323             //读EXCEL   
324   
325         ExcelHandle.readExcel("F:/红楼人物.xls");   
326   
327             //输出EXCEL   
328   
329         File filewrite=new File("F:/红楼人物2.xls");   
330   
331         filewrite.createNewFile();   
332   
333         OutputStream os=new FileOutputStream(filewrite);   
334   
335         ExcelHandle.writeExcel(os);   
336   
337             //修改EXCEL   
338   
339         ExcelHandle.modifyExcel(new File("F:/红楼人物.xls"), new File("F:/红楼人物3.xls"));   
340   
341         }   
342   
343         catch(Exception e)   
344   
345         {   
346   
347         e.printStackTrace();   
348   
349         }   
350   
351     }   
352   
353 }   
354   

附:

调用流程如下:

1.打开工作文件Workbook,在此之前先用java的io流创建或者读取文件
2.打开工作表Sheet
3.读行,然后读列。注意,行和列是从零开始的
4.取得数据进行操作
 

来自网络à读取Excel数据表

第一步:创建Workbook(术语:工作薄)

2种方法:Workbook,就可以通过它来访问Excel Sheet(术语:工作表):

//从输入流创建Workbook读取excel数据表   
  
    InputStream is = new FileInputStream(sourcefile);   
  
    jxl.Workbook workbook = Workbook.getWorkbook(is);   
  
//直接从本地文件(.xls)创建Workbook   
  
Workbook workbook = Workbook.getWorkbook(new File(excelfile)); 

一旦创建了

第二步:访问sheet。

2种方法:通过sheet的名称;或者通过下标,下标从0开始。

 1 //获取第一张Sheet表   
 2   
 3 Sheet rs = workbook.getSheet(0);   
 4   
 5 一旦得到了Sheet,就可以通过它来访问Excel Cell(术语:单元格)。   
 6   
 7 第三步:访问单元格cell   
 8   
 9 //获取第一行,第一列的值   
10   
11 Cell c00 = rs.getCell(0, 0);   
12   
13 String strc00 = c00.getContents();   
14   
15 //获取第一行,第二列的值   
16   
17 Cell c10 = rs.getCell(1, 0);   
18   
19 String strc10 = c10.getContents();   
20   
21 //获取第二行,第二列的值   
22   
23 Cell c11 = rs.getCell(1, 1);   
24   
25 String strc11 = c11.getContents();   
26   
27     
28   
29 System.out.println("Cell(0, 0)" + " value : " + strc00 + "; type : " + c00.getType());   
30   
31 System.out.println("Cell(1, 0)" + " value : " + strc10 + "; type : " + c10.getType());   
32   
33 System.out.println("Cell(1, 1)" + " value : " + strc11 + "; type : " + c11.getType());   

第四步:操作数据

如果仅仅是取得Cell的 值,我们可以方便地通过getContents()方法,它可以将任何类型的Cell值都作为一个字符串返回。如果有需要知道Cell内容的确切类型,API也提供了一系列的方法:

String strc00 = null;   
  
double strc10 = 0.00;   
  
Date strc11 = null;   
  
Cell c00 = rs.getCell(0, 0);   
  
Cell c10 = rs.getCell(1, 0);   
  
Cell c11 = rs.getCell(1, 1);   
  
if(c00.getType() == CellType.LABEL)   
  
{   
  
LabelCell labelc00 = (LabelCell)c00;   
  
strc00 = labelc00.getString();   
  
}   
  
if(c10.getType() == CellType.NUMBER)   
  
{   
  
NmberCell numc10 = (NumberCell)c10;   
  
strc10 = numc10.getValue();   
  
}   
  
if(c11.getType() == CellType.DATE)   
  
{   
  
DateCell datec11 = (DateCell)c11;   
  
strc11 = datec11.getDate();   
  
}   
  
    
  
System.out.println("Cell(0, 0)" + " value : " + strc00 + "; type : " + c00.getType());   
  
System.out.println("Cell(1, 0)" + " value : " + strc10 + "; type : " + c10.getType());   
  
System.out.println("Cell(1, 1)" + " value : " + strc11 + "; type : " + c11.getType());   

在得到

循环取出全部数据,并转化为相应格式:

 1 int rows = sheet.getRows();   
 2   
 3 for (int i = 1; i < rows; i++) {   
 4   
 5     Cell cb1 = sheet.getCell(0, i);   
 6   
 7     Cell cb2 = sheet.getCell(1, i);   
 8   
 9     Cell num3 = sheet.getCell(2, i);   
10   
11     Cell num4 = sheet.getCell(3, i);   
12   
13     
14   
15     String user = "";   
16   
17     String rule = "";   
18   
19     int numNew = 0;   
20   
21     int numEdit = 0;   
22   
23     if (cb1.getType() == CellType.LABEL) {   
24   
25          LabelCell lc = (LabelCell) cb1;   
26   
27          user = lc.getString();   
28   
29     }   
30   
31     if (cb2.getType() == CellType.LABEL) {   
32   
33          LabelCell lc = (LabelCell) cb2;   
34   
35     rule = lc.getString();   
36   
37     }   
38   
39     if (num3.getType() == CellType.NUMBER_FORMULA) {   
40   
41          NumberFormulaCell nc = (NumberFormulaCell) num3;   
42   
43          try {   
44   
45              numNew = Double.valueOf(nc.getFormula()).intValue();   
46   
47          } catch (FormulaException e) {   
48   
49              e.printStackTrace();   
50   
51          }   
52   
53     }   
54   
55     if (num4.getType() == CellType.NUMBER_FORMULA) {   
56   
57          NumberFormulaCell nc = (NumberFormulaCell) num4;   
58   
59          try {   
60   
61              numEdit = Double.valueOf(nc.getFormula()).intValue();   
62   
63          } catch (FormulaException e) {   
64   
65              e.printStackTrace();   
66   
67          }   
68   
69     }   
70   
71 }   

第五步:关闭对象,释放内存。

完成对Excel电子表格数据的处理后,一定要使用close()方法来关闭先前创建的对象,以释放读取数据表的过程中所占用的内存空间,在读取大量数据时显得尤为重要。

Cell对象后,通过 getType()方法可以获得该单元格的类型,然后与API提供的基本类型相匹配,强制转换成相应的类型,最后调用相应的取值方法getXXX(),就可以得到确定类型的值。

来自:http://www.cnblogs.com/wuxinrui/archive/2011/03/20/1989326.html

posted @ 2017-03-30 09:46  八角虫  阅读(821)  评论(0编辑  收藏  举报