1.拦截器只拦截请求
过滤器过滤request和response
2.用户登陆拦截器:
/**
* 用户登陆的拦截器
*
* @author xxx
* @date 2014-10-22
* @time 下午3:24:33
* @version 1.0
*/
@SuppressWarnings("serial")
public class LoginInterceptor extends AbstractInterceptor {
private static Logger logger = Logger.getLogger(LoginInterceptor.class);
@Override
public String intercept(ActionInvocation invocation) throws Exception
{
// String className = invocation.getAction().getClass().getName();
// String action = className.substring(className.lastIndexOf(".")+1,className.length());
// String actionName = invocation.getProxy().getActionName();
// logger.info("className="+className+";action="+action+";actionName="+actionName);
String result;
HttpServletRequest request = ServletActionContext.getRequest();
HttpServletResponse response = ServletActionContext.getResponse();
ActionContext ctx = invocation.getInvocationContext();// 取得请求相关的ActionContext实例
Map<String, Object> session = ctx.getSession();
Operator user = (Operator) session.get(WebConstant.OPERATOR);
if (null == user)//session超时
{
String type = request.getHeader("X-Requested-With");
if ("XMLHttpRequest".equalsIgnoreCase(type)|| request.getParameter("ajax") != null)//ajax提交的请求
{
response.setHeader("sessionstatus", "timeout");
logger.warn("Ajax提交,请求超时,请重新登录");
result = null;
} else//其他方式提交的请求
{
logger.warn("请求超时,请重新登录");
result = Action.LOGIN;
}
} else
{
SessionUser.setOperator(user);
result = invocation.invoke();
}
return result;
}
}
在struts.xml配置:
<package name="default" extends="struts-default">
<!-- 定义一个拦截器 拦截用户必须先登录-->
<interceptors>
<interceptor name="authority" class="xxxx.filter.LoginInterceptor" /> //自定义的拦截器
<!-- 拦截器栈 --> 包含自定义拦截器和默认拦截器
<interceptor-stack name="mydefault">
<interceptor-ref name="defaultStack" />
<interceptor-ref name="authority" />
</interceptor-stack>
</interceptors>
<!-- 定义全局Result -->
<global-results>
<!-- 当返回login视图名时,转入/login.jsp页面 -->
<!--<result name="login" >user/login.action</result> -->
<result name="login" >/jsp/login.jsp</result>
<result name="input" >/jsp/login.jsp</result>
</global-results>
</package>
使用:action类上annotation
@InterceptorRefs({
@InterceptorRef("mydefault")
})
3.编码格式过滤器
/**
* 编码过滤器
* @author xxx
* @date 2014-10-22
* @time 下午3:24:33
* @version 1.0
*/
public class EncodeFilter implements Filter {
private FilterConfig config = null;
private String encoding = null;
@Override
public void destroy() {
config = null;
encoding = null;
}
@Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
if (encoding == null) {
encoding = config.getInitParameter("encoding");
}
request.setCharacterEncoding(encoding);
response.setCharacterEncoding(encoding);
// response.setContentType("text/html;charset="+encoding );
chain.doFilter(request, response);
}
@Override
public void init(FilterConfig config) throws ServletException {
this.config = config;
}
}
web.xml配置过滤规则
<!-- 编码格式过滤 -->
<filter>
<filter-name>encoding</filter-name>
<filter-class>xxx.filter.EncodeFilter </filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>