Spring MVC, Interceptor implementation session control

This article is based on spring MVC annotations and lets spring run.

Not logged in, do not allow access to the pages within the background folder, how to determine whether to log in. Background is the key directory, and each person who operates the directory needs to write in the log table, how to implement it. Interceptors are one of the implementation scenarios.

(1) Add Systeminterceptor to the Com.geloin.spring.interceptor package and make it inherit Handlerinterceptor

/** * * @author geloin * @date 2012-3-27 PM 2:29:35 * * Package com.geloin.spring.interceptor;
Import Java.io.PrintWriter;
Import Java.util.Iterator;

Import Java.util.Map;
Import Javax.annotation.Resource;
Import Javax.servlet.http.HttpServletRequest;

Import Javax.servlet.http.HttpServletResponse;
Import Org.springframework.stereotype.Repository;

Import Org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
Import Com.embest.ruisystem.form.SystemLoggerForm;
Import Com.embest.ruisystem.form.SystemUserForm;
Import Com.embest.ruisystem.service.SystemLoggerService;
Import com.embest.ruisystem.util.Constants;

Import Com.embest.ruisystem.util.DataUtil; /** * * @author geloin * @date 2012-3-27 pm 2:29:35 */@Repository public class Systeminterceptor extends Handlerinter

	Ceptoradapter {@Resource (name = "Systemloggerservice") private Systemloggerservice Systemloggerservice; /* * (NON-JAVADOC) * * @see * ORG.SPRINGFRAMEWORK.WEB.SERVLET.HANDLER.HANDLERINTERCEPToradapter#prehandle * (javax.servlet.http.HttpServletRequest, * javax.servlet.http.HttpServletResponse, Java.lang.Object) */@SuppressWarnings ({"Rawtypes", "Unchecked"}) @Override public boolean prehandle (httpservletreq Uest request, HttpServletResponse response, Object handler) throws Exception {request.setcharacterencoding ("UTF-8")
		;
		Response.setcharacterencoding ("UTF-8");

		Response.setcontenttype ("Text/html;charset=utf-8");
		Background session control string[] Nofilters = new string[] {"login.html", "vericode.html", "index.html", "logout.html"};

		String uri = Request.getrequesturi ();
			if (Uri.indexof ("background")! =-1) {Boolean befilter = true;
					for (String s:nofilters) {if (Uri.indexof (s)! =-1) {befilter = false;
				Break
				}} if (Befilter) {Object obj = request.getsession (). getattribute (constants.logined);
					if (null = = obj) {//not logged printwriter out = Response.getwriter (); StringBuilder Builder =New StringBuilder ();
					Builder.append ("<script type=\" text/javascript\ "charset=\" utf-8\ ">");
					Builder.append ("Alert (\" page expires, please re-login \ ");");
					Builder.append ("window.top.location.href=\");
					Builder.append (Constants.basepath);
					Builder.append ("/background/index.html\";</script> ");
					Out.print (Builder.tostring ());
					Out.close ();
				return false;
					} else {//add log String operatecontent = Constants.operatecontent (URI);
						if (null! = operatecontent) {String url = uri.substring (Uri.indexof ("background"));
						String IP = request.getremoteaddr ();
						Integer userId = ((systemuserform) obj). GetId ();
						Systemloggerform form = new Systemloggerform ();
						Form.setuserid (USERID);
						Form.setip (IP);
						Form.setoperatecontent (operatecontent);
						Form.seturl (URL);
					This.systemLoggerService.edit (form);

		}}}} Map Paramsmap = Request.getparametermap (); for (iterator<map.entry> it = paramsmap.entRyset (). iterator (); it. Hasnext ();)
			{Map.entry Entry = It.next ();
			Object[] values = (object[]) entry.getvalue (); for (Object obj:values) {if (!
				datautil.isvaluesuccessed (obj)) {throw new RuntimeException ("with illegal characters:" + obj);
	}}} return Super.prehandle (request, response, handler);
 }

}

(2) Modify the Context-dispatcher.xml to let Spring manage the Interceptor

<mvc:interceptors>
	<bean class= "Com.geloin.spring.interceptor.SystemInterceptor"/>
</mvc :interceptors>