java中自定义异常拦截器

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

/**
*
* 描述:异常的拦截器
* 
*/

public class ExceptionInterceptor extends AbstractInterceptor{

private Log log = LogFactory.getLog(getClass());

public String intercept(ActionInvocation invocation) throws Exception {
try {
return invocation.invoke();  //放行
} catch (AppException e) {  //自定义异常
//记录错误日志

ActionSupport as = (ActionSupport) invocation.getAction();
as.addActionError(as.getText(e.getMessage())); //获取异常信息
e.printStackTrace();
log.error(e);
return "error";
} catch (Exception e) {
//记录错误日志

ActionSupport as = (ActionSupport) invocation.getAction();
as.addActionError("对不起，服务器已关闭，请联系管理员！");
e.printStackTrace();
log.error(e);
return "error";
}
}

}

Struts配置中

 <package name="" namespace="" extends="">
    <interceptors>   
    <interceptor name="exceptionInterceptor" class="ExceptionInterceptor类的全类名"/>   
    <interceptor-stack name="myStack">
    <interceptor-ref name="exceptionInterceptor"/> 
    <interceptor-ref name="defaultStack"/>
    </interceptor-stack>
    </interceptors>
   
    <default-interceptor-ref name="myStack"/>

</package>

自定义异常

public class AppException extendsRuntimeException{ }