有时候,我们在配置了Struts2后还会想用servlet,但是默认是用不了的,都被struts2拦截了，并在struts.xml中匹配是否有该action
那么,如何使用呢？
1.新建一个filter，用于过滤servlet
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;
public class ReDispatcherFilter implements Filter {
private ArrayList<String> includes = new ArrayList<String>();
@Override
public void destroy() {
}
@Override
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);
if (this.includes.contains(target)) {
RequestDispatcher rdsp = request.getRequestDispatcher(target);
rdsp.forward(req,resp);
} else
chain.doFilter(req, resp);
}
@Override
public void init(FilterConfig config) throws ServletException {
this.includes.addAll(Arrays.asList(config.getInitParameter(
"includeServlets").split(",")));
}
}
2.在web.xml中做适当配置，在struts2的配置前加上下面的代码:
<filter>
<filter-name>redisp</filter-name>
<filter-class>com.kcjxkj.filter.ReDispatcherFilter</filter-class>
<init-param>
<param-name>includeServlets</param-name>
<param-value>ValidateEmail</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>redisp</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
其中,<param-value></param-value>中为web.xml中配置的要过滤的servlet名,多个之间用","逗号隔开