Question

我试图实现Servlet过滤器功能。基本上它将是Filter-＆gt; Servlet-＆gt; Filter。但是，部署没有发生。我完全不知道发生了什么，因为我对它很陌生。

这是我迄今为止所做的事情 -

MyFilter.java

package p;
import java.io.IOException;
import java.io.PrintWriter;  
import javax.servlet.*;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;

public class MyFilter implements Filter {
@Override
public void init(FilterConfig cfg) throws ServletException{    
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws ServletException, IOException
{
    response.setContentType("text/html;charset=UTF-8");
    try (PrintWriter out = response.getWriter()) {
        out.println("Filter is invoked before.");
        chain.doFilter(request, response);
        out.println("Filter is invoked after.");            
    }
}
@Override
public void destroy()
{        
}    
}

HelloServlet.java

package p;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class HelloServlet extends HttpServlet {
@Override
public void doGet(HttpServletRequest request, HttpServletResponse     
response) throws ServletException, IOException {
    response.setContentType("text/html;charset=UTF-8");
    try (PrintWriter out = response.getWriter()) {
        out.println("<!DOCTYPE html>\n"+
                   "<head></head>\n"+
                   "<body>\n"+
                   "<p><h1>Servlet<h1><p>\n"+
                   "</body></html>");            
    }
    }        
    }

的index.html

   <html>
   <head></head>
   <body>
   <a href="HelloServlet">Click here</a>
   </body>
   </html>

＆安培;最后是web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee"     
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
   xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee 
   http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
   <servlet>
       <servlet-name>HelloServlet</servlet-name>
       <servlet-class>p.HelloServlet</servlet-class>
   </servlet>
   <servlet-mapping>
       <servlet-name>HelloServlet</servlet-name>
       <url-pattern>/HelloServlet</url-pattern>
   </servlet-mapping>
   <filter>
       <filter-name>MyFilter</filter-name>
       <filter-class>MyFilter</filter-class>
   </filter>
   <filter-mapping>
       <filter-name>MyFilter</filter-name>
       <url-pattern>/HelloServlet</url-pattern>
   </filter-mapping>
   <session-config>
       <session-timeout>30</session-timeout>
   </session-config>
</web-app>

＆安培;最后一些错误消息

Starting Tomcat process...
Waiting for Tomcat...
Tomcat server started.
Incrementally deploying http://localhost:8084/WebApp5
Completed incremental distribution of http://localhost:8084/WebApp5
Incrementally redeploying http://localhost:8084/WebApp5
Deploy is in progress...
deploy?config=file%3A%2FC 
%3A%2FUsers%2FSANDEE%7E1%2FAppData%2FLocal%2FTemp%
2Fcontext264440372445081080    
3.xml&path=/WebApp5
FAIL - Deployed application at context path /WebApp5 but context  
failed to start
C:\Users\SANDEEP ROY\Documents\NetBeansProjects\WebApp5\nbproject\build- 
impl.xml:1045: The module has not been deployed.
See the server log for details.
BUILD FAILED (total time: 9 seconds)

我正在玩其他项目，似乎这个特定项目没有被部署，其他项目工作正常。

此外，当我构建这个（失败）时，我试图从Firefox访问本地主机，甚至不加载。所以看来这个项目对tomcat也有一些伤害。完全感觉停电。

Servlet过滤器部署问题

0 个答案: