Hello,
In order to study/practice using struts 2, I am using a the
struts2-archetype-starter maven archetype.
I've come across a problem trying to add my own filter, and was hoping
someone could point me in the right direction.
I'm using eclipse with maven for my build process, and Tomcat 8.5 as a
localhost server.
I have been able to set up some basic actions. I am now trying to add a
filter to set the encoding of requests, so that I can handle Japanese
input. To do this, I referenced this resource about filters, to create
my own custom filter, which I reference in the web.xml file of my project
Filters reference source:
https://www.oracle.com/java/technologies/filters.html
However, when I try to access my project's url, I get a 404 error.
I've tried adding breakpoints to my filter and debugging the project on
the server, but the breakpoint is never hit. (I am able to debug and use
breakpoints otherwise)
To my web.xml file I have added the filter declaration:
<filter>
<filter-name>MyEncoder</filter-name>
<filter-class>jono_group.mav_arch_2.filters.MyChaEnFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>Shift_JIS</param-value>
</init-param>
</filter>
and this filter mapping
<filter-mapping>
<filter-name>MyEncoder</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
They are positioned infront of all the other filters and filter-mappings
respectively, with the intention that it will executed at the front of
the filter chain.
With the above filter and filter-mapping, the maven build (clean package
runs successfully, reporting no errors. But I get the 404. As soon as I
remove both of them, the 404 error goes away and my actions work as
expected.
Any help would be greatly appreciated.
My filter class is as follows:
package jono_group.mav_arch_2.filters;
import java.io.IOException;
import java.nio.file.DirectoryStream.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
public class MyChaEnFilter implements Filter
{
private FilterConfig filterConfig = null;
private String encoding;
public void doFilter(ServletRequest request,
ServletResponse response, FilterChain chain) throws
IOException, ServletException {
String encoding = selectEncoding(request);
if (encoding != null)
request.setCharacterEncoding(encoding);
chain.doFilter(request, response);
}
public void init(FilterConfig filterConfig) throws
ServletException {
this.filterConfig = filterConfig;
this.encoding = filterConfig.getInitParameter("encoding");
}
protected String selectEncoding(ServletRequest request) {
return (this.encoding);
}
public void destroy() {
this.filterConfig = null;
}
@Override
public boolean accept(Object entry) throws IOException {
// TODO Auto-generated method stub
return false;
}
}
Regards,
Jonathan
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