0

我有这个 servletDeleteData.java

package sevenet;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.*;
import java.sql.*;

@WebServlet("/deleteData")
public class DeleteData extends HttpServlet {

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // Some code.
    }
}

注册如下web.xml

<servlet>
    <servlet-name>DeleteData</servlet-name>
    <servlet-class>servlet.DeleteData</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>DeleteData</servlet-name>
    <url-pattern>/DeleteData</url-pattern>
</servlet-mapping>

启动 webapp 时出现错误：

javax.servlet.ServletException: Error instantiating servlet class servlet.DeleteData
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
    org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2500)
    org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2489)
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    java.lang.Thread.run(Thread.java:745)

这是如何引起的，我该如何解决？

4

2 回答 2

1

DeleteData.javapackage sevenet;中的包名有错字

纠正DeleteData.java中的包名称或更新web.xml中的包名称，如下所示：

<servlet>
    <servlet-name>DeleteData</servlet-name>
    <servlet-class>sevenet.DeleteData</servlet-class>
</servlet>
于 2016-03-25T14:58:24.093 回答
0

您忘记了 doGet() 上的 @Override 注释，并且 web.xml 中的 DeleteData servlet 包名称不正确

于 2016-03-25T16:37:41.933 回答