when i tried to create a workbook in normal java class it is creating but when i tried to run the same on servlet it is throwing exceptions
Normal java class
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class Sampleclass {
public static void main(String[] args) {
FileInputStream file;
try {
file = new FileInputStream(new File("C:\\Users\\Rajasekhar\\Desktop\\EmployeeDetails.xlsx"));
Workbook book=new XSSFWorkbook(file);
System.out.println(book);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
Servlet
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
@SuppressWarnings("serial")
public class sampleServlet extends HttpServlet {
@Override
public void doGet(HttpServletRequest req, HttpServletResponse resp)
{
FileInputStream file;
try {
file = new FileInputStream(new File("C:\\Users\\Rajasekhar\\Desktop\\EmployeeDetails.xlsx"));
Workbook book=new XSSFWorkbook(file);
} catch (FileNotFoundException e) {
System.out.println("exception occured is "+e);
e.printStackTrace();
} catch (IOException e) {
System.out.println("exception occured is "+e);
e.printStackTrace();
}
}
}
the exception occured was
SEVERE: Servlet.service() for servlet [upload] in context with path [/Temp2] threw exception [Servlet execution threw an exception] with root cause
java.lang.ClassNotFoundException: org.apache.poi.xssf.usermodel.XSSFWorkbook
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1718)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1569)
at sampleServlet.doGet(sampleServlet.java:23)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:315)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
I have added all required apache poi jars.
下载poi-ooxml.jar
并将其添加到您的类路径中。
You need the file poi-ooxml.jar
in your classpath as @Jens said.
You are using the correct import
statement but it seems that you don't have the file poi-ooxml.jar
in the class path of your web container.
If you are using maven , you should put this dependency in your pom.xml
inside the <dependencies>
tag:
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.15</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.15</version>
</dependency>
Adding/Updating below Gradle dependency for Apache Poi should resolve the issue .
compile group: 'org.apache.poi', name: 'poi', version: '4.1.2'
compile group: 'org.apache.poi', name: 'poi-ooxml', version: '4.1.2'
If you imported properly and added jar files such as poi and poi-ooxml and still facing issues then try this version
its work ... and hope your issues will solved.
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.17</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.17</version>
</dependency>
我知道这可能会晚,但问题是您可能会忽略文件xmlbeans-2.6.0.jar
,该文件与其他 apache jar (ooxml-lib) 位于单独的文件中
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