「java修改excel」java修改excel内容并生成pdf

博主:adminadmin 2022-12-05 04:18:06 91

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java修改Excel

package common.util;

import jxl.*;

import jxl.format.UnderlineStyle;

import jxl.write.*;

import jxl.write.Number;

import jxl.write.Boolean;

import java.io.*;

/**

* Created by IntelliJ IDEA.

* User: xl

* Date: 2005-7-17

* Time: 9:33:22

* To change this template use File | Settings | File Templates.

*/

public class ExcelHandle

{

public 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")这里有两种方法获取sheet表,1为名字,而为下标,从0开始

Sheet st = rwb.getSheet("original");

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

//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);

//**************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);

//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();

}

}

//测试

public static void main(String[] args)

{

try

{

//读Excel

ExcelHandle.readExcel("f:/testRead.xls");

//输出Excel

File fileWrite = new File("f:/testWrite.xls");

fileWrite.createNewFile();

OutputStream os = new FileOutputStream(fileWrite);

ExcelHandle.writeExcel(os);

//修改Excel

ExcelHandle.modifyExcel(new file(""),new File(""));

}

catch(Exception e)

{

e.printStackTrace();

}

}

}

Java程序中怎么修改excel文件后缀

首先获取不包含后缀的文件名。String filename=filename.substring(0,lastIndexOf("."));

然后加上你想要的文件后缀即可。filename=filename+".txt" or filename=filename+".doc"。

OK啦!

使用java如何修改EXCEL后读取修改后文件的数据

也不是太清楚,给你个参考思路

java poi 是可以读取相关公式计算后的值的,不过也是要求操作后要保存才可以,

(excel公式其实是你打开后才计算的值)

详细的你可以再百度下 java poi 读取公式值。

java操作poi怎么更改excel中的数据

修改完需要写入,也就是保存一下的。

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import org.apache.poi.hssf.usermodel.HSSFCell;

import org.apache.poi.hssf.usermodel.HSSFRow;

import org.apache.poi.hssf.usermodel.HSSFSheet;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;

public class ChangeCell {

@SuppressWarnings("deprecation")

public static void main(String[] args) {

String fileToBeRead = "C:\\exp.xls"; // excel位置

int coloum = 1; // 比如你要获取第1列

try {

HSSFWorkbook workbook = new HSSFWorkbook(new FileInputStream(

fileToBeRead));

HSSFSheet sheet = workbook.getSheet("Sheet1");

for (int i = 0; i = sheet.getLastRowNum(); i++) {

HSSFRow row = sheet.getRow((short) i);

if (null == row) {

continue;

} else {

HSSFCell cell = row.getCell((short) coloum);

if (null == cell) {

continue;

} else {

System.out.println(cell.getNumericCellValue());

int temp = (int) cell.getNumericCellValue();

cell.setCellValue(temp + 1);

}

}

}

FileOutputStream out = null;

try {

out = new FileOutputStream(fileToBeRead);

workbook.write(out);

} catch (IOException e) {

e.printStackTrace();

} finally {

try {

out.close();

} catch (IOException e) {

e.printStackTrace();

}

}

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

}

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发布于:2022-12-05,除非注明,否则均为首码项目网原创文章,转载请注明出处。