Flex控制session方法(转)
Flex控制session方法
?
1、在web.xml增加
<filter>
?? <filter-name>AMFContextFilter</filter-name>
?? <filter-class>soft.flex.context.AMFContextFilter</filter-class>
</filter>
<filter-mapping>
?? <filter-name>AMFContextFilter</filter-name>
?? <servlet-name>MessageBrokerServlet</servlet-name>
</filter-mapping>
2、增加AMFContextFilter文件
package soft.flex.context;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class AMFContextFilter implements Filter {
public void doFilter(ServletRequest request, ServletResponse response,
??? FilterChain chain) throws ServletException, IOException {
?? AMFContext.setCurrentContext((HttpServletRequest) request,
???? (HttpServletResponse) response);
?? chain.doFilter(request, response);
}
public void init(FilterConfig arg0) throws ServletException {
?? // TODO Auto-generated method stub
}
public void destroy() {
?? // TODO Auto-generated method stub
}
}
3、增加AMFContext文件
package soft.flex.context;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class AMFContext {
/**
* ThreadLocal object for storing object in current thread.
*/
@SuppressWarnings("unchecked")
private static ThreadLocal tl = new ThreadLocal();
/**
* Set current context
*
* @param request
*??????????? The HttpRequest object
* @param response
*??????????? The HttpResponses object
*/
@SuppressWarnings("unchecked")
static public void setCurrentContext(HttpServletRequest request,
??? HttpServletResponse response) {
?? AMFContext c = getCurrentContext();
?? if (c == null) {
??? c = new AMFContext(request, response);
??? tl.set(c);
?? } else {
??? c.setRequest(request);
??? c.setResponse(response);
?? }
}
/**
* Get current context value
*
* @return The current context
*/
static public AMFContext getCurrentContext() {
?? return (AMFContext) tl.get();
}
// ----------------------
//
// Class members
//
// ----------------------
/**
* The http request object. The lifecycle of the request object is defined
* as the request scope. It may be reused in another incoming connection, so
* dont use it in another thread.
*/
private HttpServletRequest request;
/**
* The http response object. The lifecycle of the response object is defined
* as the request scope. Dont use it in another thread. Also dont write
* output to the response when it is used in the context, but you may get or
* set some response header when it is safe.
*/
private HttpServletResponse response;
/**
* The constructor is private, to get an instance of the AMFContext, please
* use getCurrentContext() method.
*
* @param request
* @param response
*/
private AMFContext(HttpServletRequest request, HttpServletResponse response) {
?? this.request = request;
?? this.response = response;
}
/**
* Get request object
*
* @return Http request object
*/
public HttpServletRequest getRequest() {
?? return request;
}
/**
* Set request object
*
* @param Http
*??????????? request object
*/
public void setRequest(HttpServletRequest request) {
?? this.request = request;
}
/**
* Get response object
*
* @return Http response object
*/
public HttpServletResponse getResponse() {
?? return response;
}
/**
* Set response object
*
* @param response
*??????????? Http response object
*/
public void setResponse(HttpServletResponse response) {
?? this.response = response;
}
/**
* Get the servlet context
*
* @return
*/
public ServletContext getServletContext() {
?? HttpSession session = this.getSession();
?? return session.getServletContext();
}
/**
* Get the current running session
*
* @return
*/
public HttpSession getSession() {
?? return request.getSession();
}
/**
* Get an object stored in the session.
*
* @param attr
*??????????? Attribute Name
* @return The value stored under the attribute name.
*/
public Object getSessionAttribute(String attr) {
?? HttpSession session = this.getSession();
?? return session.getAttribute(attr);
}
/**
* Store an object in the session.
*
* @param attr
*??????????? Attribute Name
* @param value
*??????????? The value.
*/
public void setSessionAttribute(String attr, Object value) {
?? HttpSession session = this.getSession();
?? session.setAttribute(attr, value);
}
/**
* Get an object stored in the servlet context.
*
* @param attr
*??????????? Attribute Name
* @return The value stored under the attribute name.
*/
public Object getContextAttribute(String attr) {
?? ServletContext sc = this.getServletContext();
?? return sc.getAttribute(attr);
}
/**
* Store an object in the servlet context.
*
* @param attr
*??????????? Attribute Name
* @param value
*??????????? The value.
*/
public void setContextAttribute(String attr, Object value) {
?? ServletContext sc = this.getServletContext();
?? sc.setAttribute(attr, value);
}
/**
* Get an object stored in the current request.
*
* @param attr
*??????????? Attribute Name
* @return The value stored under the attribute name.
*/
public Object getRequestAttribute(String attr) {
?? return request.getAttribute(attr);
}
/**
* Store an object in the current request.
*
* @param attr
*??????????? Attribute Name
* @param value
*??????????? The value.
*/
public void setRequestAttribute(String attr, Object value) {
?? request.setAttribute(attr, value);
}
}
4、增加FlexSessionInterceptor文件
package soft.flex.context;
import javax.servlet.http.HttpServletRequest;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import soft.common.util.Constants;
public class FlexSessionInterceptor implements MethodInterceptor {
public Object invoke(MethodInvocation invocation) throws Throwable {
?? AMFContext context = AMFContext.getCurrentContext();
?? HttpServletRequest request = context.getRequest();
?? if (request.getSession().getAttribute(Constants.LOGIN_USER_INFO) == null) {
??? throw new Exception("Session超时，请您重新登陆！");
?? }
?? return invocation.proceed();
}
}
5、在applicationContext.xml增加以下内容
<!-- 配置SessionAdvice -->
<bean id="sessionAdvice" />
??? <!-- 配置自动代理 -->
??? <bean id="beanNameAutoProxyCreator"
??? class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">
??? <property name="beanNames">
??? ?? <list>
??? ??? <value>formDesignerService</value>
??? ?? </list>
??? </property>
??? <property name="interceptorNames">
??? ?? <value>sessionAdvice</value>
??? </property>
??? </bean>
这样子的话，在所有的flex请求中都会先执行FlexSessionInterceptor类中的invoke方法如果要在任何java类中获取sessionr的话，使用AMFContext.getCurrentContext().getSession()即可
