Web Custom Labels

1: Why do I need a custom label?

When the JSP's built-in tags and tags in the JSTL tag library don't meet the requirements, developers are required to customize the label.

2: First introduce our web small configuration

<?xml version= "1.0" encoding= "UTF-8"? ><taglib xmlns= "Http://java.sun.com/xml/ns/javaee" xmlns:xsi= "http:/ /www.w3.org/2001/xmlschema-instance "xsi:schemalocation=" Http://java.sun.com/xml/ns/javaee http://java.sun.co M/xml/ns/javaee/web-jsptaglibrary_2_1.xsd "version=" 2.1 "><description> <! [Cdata[security tags]]></description><tlib-version>1.0</tlib-version><short-name> Security</short-name><uri>http://www.springsecurity.org/jsp</uri><tag> <description > <! [Cdata[authorize tag]]> </description> <name>authorize</name> <tag-class> cn.st Ruts.util.AuthorizeTag </tag-class> <body-content>JSP</body-content> <attribute> & Lt;name>url</name> <required>false</required> &LT;RTEXPRVALUE&GT;TRUE&LT;/RTEXPRVALUE&G        T <type>java.lang.String</type> &LT;/attribute></tag></taglib>   

3: Tool class

public class Authorizetag extends Bodytagsupport {//You provide a user name, I give a user a set of permissions, and the operation is in the right DAO private Iprivilegedao    Privilegedao;    Private String URL;      Public String GetURL () {return URL;      } public void SetUrl (String url) {url = URL; } @Override public int doStartTag () {//If the URL is not empty, the URL is displayed, otherwise the IF (null! = URL) {Getuserda        O (); HttpServletRequest request = (HttpServletRequest) pagecontext.getrequest ();        UserInfo info= (UserInfo) request.getsession (). getattribute ("UserInfo");        list<privilege> list = Privilegedao.fimdallprivilegebyuserid (Info.getuserid ());  for (Privilege item:list) {if (Item.geturl (). Equals (URL)) {//render the label correctly return eval_body_include; }}} return this.      Skip_body; }public void Getuserdao () {Webapplicationcontext ApplicationContext =   Webapplicationcontextutils.getwebapplicationcontext (Pagecontext.getservletcontext ()); privilegedao= (Iprivilegedao) ApplicationContext.Getbean ("Iprivilegedao");} 

4:jsp

Introduce our web-customized links <% @taglib prefix= "Custom" uri= "http://www.springsecurity.org/jsp"%>// Click to get the table with the URL attribute in our column if his URL is not empty, display our "Add role" <custom:authorize url= "/role/addrole" ><a href= "#" > Add role </a></custom:authorize>

　　

　　

Web Custom Labels