diff --git a/AdminFilter.java b/AdminFilter.java
new file mode 100644
index 0000000..04785bf
--- /dev/null
+++ b/AdminFilter.java
@@ -0,0 +1,38 @@
+package filter;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+
+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;
+import javax.servlet.http.HttpSession;
+
+/**
+ * 系统管理员过滤
+ * @author Mingyue
+ *
+ */
+public class AdminFilter implements Filter {
+
+	public void init(FilterConfig filterConfig) throws ServletException {
+
+    }
+	
+	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
+		HttpServletRequest req = (HttpServletRequest) request;
+		HttpSession session = req.getSession();
+		if(session == null || session.getAttribute("admin") == null) {
+			HttpServletResponse rep = (HttpServletResponse)response;
+			PrintWriter out =response.getWriter();
+			// iframe父页面直接跳转到登录界面
+			out.print("<script>window.parent.location.href='"+ req.getContextPath() +"/adminLogin.html'</script>");
+		}
+		chain.doFilter(request, response);
+	}
+}