Posted on 2012-08-05 17:24 xcp 阅读(799) 评论(0) 编辑 收藏 所属分类: struts2
先看一下struts2 的web.xml文件:
<filter>
<filter-name>struts2</filter-name>
<filter-class>
org.apache.struts2.dispatcher.FilterDispatcher
</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
在请求应用时,struts2将会截获所有请求,对于servlet请求将不能够正常相应,是struts2把servlet当成action了,因为servlet和action都是没有后缀的
解决方法目前有四种:
方法1:统一在servlet后面加上.servlet(包括web.xml配置文件中和页面上使用servlet的地方)
方法2:继承StrutsPrepareAndExecuteFilter,实现以下两个方法。
public void init(FilterConfig filterConfig) throws
ServletException {
..............................
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws
IOException, ServletException {
...............................
if(url.contain("servlet")){
((HttpServletResponse) response).sendRedirect(redirectUrl);
}
super.doFilter(request, response, chain);
}
方法3:修改拦截页面配置
原:
<filter>
<filter-name>struts2</filter-name>
<filter-class>
org.apache.struts2.dispatcher.FilterDispatcher
</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>
/* </url-pattern>
</filter-mapping>
现:
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>*.action</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/user/*</url-pattern>
</filter-mapping>
servlet的请求路径不必改变
方法4:在struts.xml文件中修改
-------------------------------------------------------
其实真正的解决方法在此:
struts2和servlet同时用(访问servlet时被struts2过滤器拦截问题的解决)
分类: Struts22012-11-19 11:58 400人阅读 评论(0) 收藏 举报
在同一个项目中间,如果既用到servlet有用了struts2的框架,运行项目时可能无法正常使用servlet,原因是在配置struts2的核心控制器时<url-pattern>/*</url-pattern>所致,需要定义一个过滤器,将servlet过滤,使struts2的核心控制器对servlet不起作用。注意:在xml文件中定义的servlet过滤器要写在struts2核心控制器前面,否则还是不能使用。举例来说,定义的过滤器文件是ReDispatcherFilter.java,只需按照该文件中注释内容做以下配置,即可。
文件内容如下:
package filters;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
/**
* 该类是定义了一个过滤器,当既用到struts2有用到servlet时,
* 必须用该过滤器对所有的servlet做一次过滤,否则servlet将无法正常运行。
* 同时在web.xml中,在定义struts的核心控制器前面添加该过滤器,添加代码如下:
* <filter>
* <filter-name>redisp</filter-name>
* <filter-class>filters.ReDispatcherFilter(该过滤器的类名)</filter-class>
* <init-param>
* <param-name>includeServlets</param-name>
* <param-value>所有配置的servlet名字</param-value>
* </init-param>
* </filter>
* <filter-mapping>
* <filter-name>redisp</filter-name>
* <url-pattern>/*</url-pattern>
* </filter-mapping>
* @author xsl
*
*/
public class ReDispatcherFilter implements Filter {
public void destroy() {
// TODO Auto-generated method stub
}
public void doFilter(ServletRequest req, ServletResponse resp,
FilterChain chain) throws IOException, ServletException
{
HttpServletRequest request = (HttpServletRequest)req;
String target = request.getRequestURI();
target = target.lastIndexOf("?")>0
?target.substring(target.lastIndexOf("/")+1,target.lastIndexOf("?")-target.lastIndexOf("/"))
:target.substring(target.lastIndexOf("/")+1);
System.out.println(target);
if(this.includes.contains(target))
{
RequestDispatcher rdsp = request.getRequestDispatcher(target);
System.out.println("go..............."+rdsp);
rdsp.forward(req, resp);
}
else
chain.doFilter(req, resp);
}
private ArrayList<String> includes = new ArrayList<String>();
public void init(FilterConfig config) throws ServletException {
this.includes.addAll( Arrays.asList(config.getInitParameter("includeServlets").split(",")));
}
}
使用时复制该段代码,按照注释做相应配置就可以了。