如何读写excel文件? 请描述详细些最好是有代码示例 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 首先去下载jxl.jar类包。akarta的POI项目提供了一组操纵Windows文档的Java API,如下几个类提供了操作Excel文件的方便的途径:HSSFWorkbook、HSSFSheet、HSSFRow、HSSFCell,分别代表了Excel电子表格中的Book、Sheet、行和单元格。 你可以在下面地址下载到最新的POI工具包: http://jakarta.apache.org/poi/index.html 下面的代码创建一个Excel文件test.xls,并在第一行的第一格中写入一条消息: import org.apache.poi.hssf.usermodel.*; import java.io.FileOutputStream; // code run against the jakarta-poi-1.5.0-FINAL-20020506.jar. public class PoiTest { static public void main(String[] args) throws Exception { FileOutputStream fos = new FileOutputStream("d:\test.xls"); HSSFWorkbook wb = new HSSFWorkbook(); HSSFSheet s = wb.createSheet(); wb.setSheetName(0, "first sheet"); HSSFRow row = s.createRow(0); HSSFCell cell = row.createCell(0); cell.setCellValue("Hello! This message is generated from POI."); wb.write(fos); fos.close(); } } 读取Excel文件时,首先生存一个POIFSFileSystem对象,由POIFSFileSystem对象构造一个HSSFWorkbook,该HSSFWorkbook对象就代表了Excel文档。下面代码读取上面生成的Excel文件写入的消息字串: POIFSFileSystem fs = null; HSSFWorkbook wb = null; try { fs = new POIFSFileSystem(new FileInputStream("d:\test.xls")); wb = new HSSFWorkbook(fs); } catch (IOException e) { e.printStackTrace(); } HSSFSheet sheet = wb.getSheetAt(0); HSSFRow row = sheet.getRow(0); HSSFCell cell = row.getCell((short) 0); String msg = cell.getStringCellValue(); 楼上蛮搞笑的嘛,让人家下载JXL,给出的却是POI的代码。不是搜索来的吧?POI、JXL是两套东西,都可以用来操作EXCEL文件。 去下载一个jxl.java 去google搜索一下多的是!代码就是下面的!import java.io.File;import jxl.Cell;import jxl.Sheet;import jxl.Workbook;import jxl.write.Label;import jxl.write.WritableSheet;import jxl.write.WritableWorkbook;//生成Excel的类public class ExcelUtils { public static void main(String args[]) { readExcel(); } public static void createExcel() { try { //打开文件 WritableWorkbook book = Workbook.createWorkbook(new File("测试.xls")); //生成名为“第一页”的工作表,参数0表示这是第一页 WritableSheet sheet = book.createSheet("第一页", 0); //在Label对象的构造子中指名单元格位置是第一列第一行(0,0) //以及单元格内容为test Label label = new Label(0, 0, "test"); //将定义好的单元格添加到工作表中 sheet.addCell(label); /* * 生成一个保存数字的单元格 必须使用Number的完整包路径,否则有语法歧义 单元格位置是第二列,第一行,值为789.123 */ jxl.write.Number number = new jxl.write.Number(1, 0, 789.123); sheet.addCell(number); //写入数据并关闭文件 book.write(); book.close(); } catch (Exception e) { e.printStackTrace(); } } public static void readExcel() { try { Workbook book = Workbook.getWorkbook(new File("测试.xls")); // 获得第一个工作表对象 Sheet sheet = book.getSheet(0); // 得到第一列第一行的单元格 Cell cell1 = sheet.getCell(0, 0); String result = cell1.getContents(); System.out.println(result); book.close(); } catch (Exception e) { System.out.println(e); } } public void modifyExcel() { try { // Excel获得文件 Workbook wb = Workbook.getWorkbook(new File("测试.xls")); // 打开一个文件的副本,并且指定数据写回到原文件 WritableWorkbook book = Workbook.createWorkbook(new File("测试.xls"), wb); // 添加一个工作表 WritableSheet sheet = book.createSheet("第二页", 1); sheet.addCell(new Label(0, 0, "第二页的测试数据")); book.write(); book.close(); } catch (Exception e) { System.out.println(e); } }} 上面是我自己写的测试代码!你把main方法里面的改改就可以了! jxl的例子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 D5sheet.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]); }}}哥们儿,给点分 Java ZipInputStream获取ZipEntry为null 请问个位JNDI到底是什么意思呀,始终没有理解清楚 关于Jtable 的问题! 它在哪里查找数据库? 参数传递问题,下附分治法程序,问题看代码备注 简单问题 简单的问题? 怎样在一个TextField()中,从它的右端输入文字.向各位高手求解 在2000中设置环境变量的方法是什么? 用java开发数据库,连接db2应该如何设置classpath (或者说应引入哪个包) 该怎么对线程控制,让一个线程侦听100个Socket连接呢? 进程问题(急)
akarta的POI项目提供了一组操纵Windows文档的Java API,如下几个类提供了操作Excel文件的方便的途径:HSSFWorkbook、HSSFSheet、HSSFRow、HSSFCell,分别代表了Excel电子表格中的Book、Sheet、行和单元格。 你可以在下面地址下载到最新的POI工具包: http://jakarta.apache.org/poi/index.html 下面的代码创建一个Excel文件test.xls,并在第一行的第一格中写入一条消息: import org.apache.poi.hssf.usermodel.*;
import java.io.FileOutputStream;
// code run against the jakarta-poi-1.5.0-FINAL-20020506.jar.
public class PoiTest {
static public void main(String[] args) throws Exception {
FileOutputStream fos = new FileOutputStream("d:\test.xls");
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet s = wb.createSheet();
wb.setSheetName(0, "first sheet");
HSSFRow row = s.createRow(0);
HSSFCell cell = row.createCell(0);
cell.setCellValue("Hello! This message is generated from POI.");
wb.write(fos);
fos.close();
}
} 读取Excel文件时,首先生存一个POIFSFileSystem对象,由POIFSFileSystem对象构造一个HSSFWorkbook,该HSSFWorkbook对象就代表了Excel文档。下面代码读取上面生成的Excel文件写入的消息字串:
POIFSFileSystem fs = null;
HSSFWorkbook wb = null;
try {
fs = new POIFSFileSystem(new FileInputStream("d:\test.xls"));
wb = new HSSFWorkbook(fs);
} catch (IOException e) {
e.printStackTrace();
}
HSSFSheet sheet = wb.getSheetAt(0);
HSSFRow row = sheet.getRow(0);
HSSFCell cell = row.getCell((short) 0);
String msg = cell.getStringCellValue();
import jxl.Sheet;
import jxl.Workbook;
import jxl.write.Label;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
//生成Excel的类
public class ExcelUtils {
public static void main(String args[]) {
readExcel();
} public static void createExcel() {
try {
//打开文件
WritableWorkbook book = Workbook.createWorkbook(new File("测试.xls")); //生成名为“第一页”的工作表,参数0表示这是第一页
WritableSheet sheet = book.createSheet("第一页", 0); //在Label对象的构造子中指名单元格位置是第一列第一行(0,0)
//以及单元格内容为test
Label label = new Label(0, 0, "test"); //将定义好的单元格添加到工作表中
sheet.addCell(label); /*
* 生成一个保存数字的单元格 必须使用Number的完整包路径,否则有语法歧义 单元格位置是第二列,第一行,值为789.123
*/
jxl.write.Number number = new jxl.write.Number(1, 0, 789.123);
sheet.addCell(number); //写入数据并关闭文件
book.write();
book.close(); } catch (Exception e) {
e.printStackTrace();
}
} public static void readExcel() {
try {
Workbook book = Workbook.getWorkbook(new File("测试.xls")); // 获得第一个工作表对象
Sheet sheet = book.getSheet(0); // 得到第一列第一行的单元格
Cell cell1 = sheet.getCell(0, 0);
String result = cell1.getContents();
System.out.println(result); book.close(); } catch (Exception e) {
System.out.println(e);
}
} public void modifyExcel() {
try {
// Excel获得文件
Workbook wb = Workbook.getWorkbook(new File("测试.xls")); // 打开一个文件的副本,并且指定数据写回到原文件
WritableWorkbook book = Workbook.createWorkbook(new File("测试.xls"),
wb); // 添加一个工作表
WritableSheet sheet = book.createSheet("第二页", 1); sheet.addCell(new Label(0, 0, "第二页的测试数据")); book.write();
book.close();
} catch (Exception e) {
System.out.println(e);
}
}
}
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]);
}
}
}哥们儿,给点分