大家好,今天我跟视频学习jsp时,
首先编写了一个java程序HelloWorldServlet
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class HelloWorldServlet {
protected void doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException ,IOException{
System.out.println("doGet");
response.getWriter().write("<a href='http://www.baidu.com>go</a>");
}
}然后我将HelloWorldServlet.class复制到了webapps/test/WEB-INF/classes文件夹里之后我又修改了配置文件webapps/test/WEB-INF下的web.xml文件
<?xml version="1.0" encoding="ISO-8859-1"?><web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5"> <servlet>
<servlet-name>hw</servlet-name>
<servlet-class>HelloWorldServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>hw</servlet-name>
<url-pattern>/hello</url-pattern>
</servlet-mapping>
</web-app>就在我访问http://127.0.0.1:8888/test/hello时,我遇到了如下报错。。
exception javax.servlet.ServletException: Class HelloWorldServlet is not a Servlet
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:555)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:859)
org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1555)
java.lang.Thread.run(Thread.java:674)。
首先编写了一个java程序HelloWorldServlet
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class HelloWorldServlet {
protected void doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException ,IOException{
System.out.println("doGet");
response.getWriter().write("<a href='http://www.baidu.com>go</a>");
}
}然后我将HelloWorldServlet.class复制到了webapps/test/WEB-INF/classes文件夹里之后我又修改了配置文件webapps/test/WEB-INF下的web.xml文件
<?xml version="1.0" encoding="ISO-8859-1"?><web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5"> <servlet>
<servlet-name>hw</servlet-name>
<servlet-class>HelloWorldServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>hw</servlet-name>
<url-pattern>/hello</url-pattern>
</servlet-mapping>
</web-app>就在我访问http://127.0.0.1:8888/test/hello时,我遇到了如下报错。。
exception javax.servlet.ServletException: Class HelloWorldServlet is not a Servlet
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:555)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:859)
org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1555)
java.lang.Thread.run(Thread.java:674)。
解决方案 »
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