Apache POI - 如何为xlsx创建工作簿

Question

仅使用xls时，我可以创建工作簿，但是在使用xlsx时，我似乎无法使其工作。

我使用poi-ooxml.jar，我试图使用命令

new XSSFWorkbook(); 

不过，我得到一个错误信息，每次，有什么想法？

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/poi/ss/usermodel/Workbook 
at java.lang.ClassLoader.defineClass1(Native Method) 
at java.lang.ClassLoader.defineClass(Unknown Source) 
at java.security.SecureClassLoader.defineClass(Unknown Source) 
at java.net.URLClassLoader.defineClass(Unknown Source) 
at java.net.URLClassLoader.access$000(Unknown Source) 
at java.net.URLClassLoader$1.run(Unknown Source) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.net.URLClassLoader.findClass(Unknown Source) 
at java.lang.ClassLoader.loadClass(Unknown Source) 
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) 
at java.lang.ClassLoader.loadClass(Unknown Source) 
at java.lang.ClassLoader.loadClassInternal(Unknown Source) 
at Testing2.main(Testing2.java:20) 

Caused by: java.lang.ClassNotFoundException: org.apache.poi.ss.usermodel.Workbook 

at java.net.URLClassLoader$1.run(Unknown Source) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.net.URLClassLoader.findClass(Unknown Source) 
at java.lang.ClassLoader.loadClass(Unknown Source) 
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) 
at java.lang.ClassLoader.loadClass(Unknown Source) 
at java.lang.ClassLoader.loadClassInternal(Unknown Source) 
... 13 more 

Answer 1

我认为你需要下载从http://poi.apache.org/download.html

二进制分发罐子添加到您的图书馆，它应该解决错误

一定要添加所有的罐子不只是POI -ooxml

Answer 2

Apache POI Dependency and Component。你可能会丢失：

对于POI-OOXML你需要它的依赖

1. POI，
2. POI-OOXML-模式
3. 的dom4j
4. POI-OOXML版本，yyyymmdd.jar

虽然与您的问题无关尝试搜索堆栈跟踪：

Caused by: java.lang.ClassNotFoundException: org.apache.poi.ss.usermodel.Workbook 

从长远来看，这将对您有所帮助。

Answer 3

您需要添加额外的2个罐子使POI在（.xlsx）Excel文件上工作。

1.首先您需要导入所有的jar poi-3.9

2.增加xmlbeans2.3.0.jar和dom4j-1.6.jar到类路径。这2个罐子是用于处理POI库中的.xlsx Excel文件的依赖关系罐。

Maven项目添加下面的依赖

<dependency> 
<groupId>org.apache.poi</groupId> 
<artifactId>poi</artifactId> 
<version>3.9</version> 
</dependency> 

因此编程创建exls片

package com.loknath.lab; 

import java.io.FileOutputStream; 
import org.apache.poi.hssf.usermodel.HSSFCell; 
import org.apache.poi.hssf.usermodel.HSSFRichTextString; 
import org.apache.poi.hssf.usermodel.HSSFRow; 
import org.apache.poi.hssf.usermodel.HSSFSheet; 
import org.apache.poi.hssf.usermodel.HSSFWorkbook; 
import org.apache.poi.openxml4j.exceptions.InvalidFormatException; 
import org.apache.poi.ss.usermodel.Cell; 
import org.apache.poi.ss.usermodel.Row; 
import org.apache.poi.ss.usermodel.Sheet; 
import org.apache.poi.ss.usermodel.Workbook; 
import org.apache.poi.ss.usermodel.WorkbookFactory; 


public class ReadWriteXL 
{ 
public static void main(String[] args) throws InvalidFormatException, IOException{ 

System.out.println("Write data to an Excel Sheet"); 
FileOutputStream fos=new FileOutputStream("D:/temp/1.xlsx"); 
HSSFWorkbook workBook = new HSSFWorkbook(); 
HSSFSheet spreadSheet = workBook.createSheet("email"); 
HSSFRow row; 
HSSFCell cell; 
for(int i=0;i<arr.size();i++){ 
row = spreadSheet.createRow((short) i); 
cell = row.createCell(i); 

cell.setCellValue("string value added"); 
} 

workBook.write(fos); 

} 
}}