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在eclipse(Ganymede)下尝试运行java servlet时出现问题,我正在运行Java 1.6和Apache Tomcat 6.0。运行servlet时出现问题
下面是我在做什么:
- 停止Tomcat。
- 新动态webproject。
- 呼叫项目TestProject
- 使用默认选项:上下文= “TestProject”,上下文目录= “的WebContent”,Java的源目录= “SRC”
- 右键单击项目并选择新的servlet
- 使用默认封装和调用类“HelloTest”所有其他选项都是defult
- 更改URL映射到/你好
的代码,该servlet如下(我只编辑的doGet和doPost方法一切是属TED):
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class HelloTest
*/
public class HelloTest extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public HelloTest() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
PrintWriter writer = response.getWriter();
writer.write("Hello World");
writer.flush();
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request,response);
}
}
这里是我尝试运行项目: 1.保存项目 2.右键单击该项目并选择在服务器上运行。 3.选择现有的Tomcat服务器 4.单击完成。
当我试图浏览到http://localhost:8080/TestProject/hello 我收到一个异常,说该类未找到。
javax.servlet.ServletException: Wrapper cannot find servlet class HelloTest or a class it depends on
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
java.lang.Thread.run(Thread.java:619)
根源
java.lang.ClassNotFoundException: HelloTest
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
我做错什么了吗?
如果我添加一个名为test.jsp的.jsp页面,它会完美显示,所以我知道Tomcat正在运行并提供页面,并且我拥有正确的路径。
你有没有试过把你的servlet放在包里而不是缺省包?另外,你的servlet如何映射到web.xml文件? – pgb 2009-04-23 12:14:03