User authentication based on JSP custom tags

The total is divided into 4 parts:

1. Custom Label Permissiontaghandler application scenario

2, the realization of Permissiontaghandler class

3, Configuration Permissiontaghandler

4. Using Permissiontaghandler

1. Custom Label Permissiontaghandler application scenario

User list userlist.do required, view permissions UserList

2, the realization of Permissiontaghandler class

Import Com.cicc.admin.adminconstant;import Com.cicc.enums.permission;import Java.io.ioexception;import Java.util.arrays;import Java.util.set;import Java.util.list;import Java.util.stream.collectors;import Javax.servlet.jsp.jspcontext;import Javax.servlet.jsp.jspexception;import Javax.servlet.jsp.pagecontext;import javax.servlet.jsp.tagext.simpletagsupport;/** * * @author SUPERXG */public class Permissiontaghandler extends    Simpletagsupport {private String permissions; @Override public void Dotag () throws Jspexception, IOException {set<permission> granted = Getgrantedpermi        Ssions (); if (permissions = null && granted! = null) {list<permission> permissionlist = arrays.aslist (per            Missions.split (",")). Stream (). Map (X-permission.valueof (x)). Collect (Collectors.tolist ());            if (Permissionlist.stream (). AnyMatch (x, Granted.contains (x))) {Getjspbody (). Invoke (null); }}} public void SEtpermissions (String permissions) {this.permissions = permissions; /** * Get permission to the currently logged in employee * * @return */private set<permission> getgrantedpermissions () {Em        Ployeebeansession session = GetSession ();        if (session! = NULL) {return session.getpermissions ();        } else {return null;  }}/** * Gets the current session * * @return */private Employeebeansession getsession () {Jspcontext        context = Getjspcontext ();        Object session = Context.getattribute (Adminconstant.session_key, Pagecontext.session_scope);        if (session! = NULL && session instanceof Employeebeansession) {return (employeebeansession) session;    } return null; }}

　　

3, Configuration Permissiontaghandler

<?xml version= "1.0" encoding= "UTF-8"? ><taglib version= "2.1" 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.com/xml/ns/javaee/web-jsptaglibrary_2_1.xsd ">    <tlib-version>1.0</tlib-version>    <short-name>gg</short-name>    <uri>/WEB-INF/tld/platform</uri>    <tag>        <name>permission</name>        <tag-class>com.cicc.admin.web.permissiontaghandler</ tag-class>        <body-content>scriptless</body-content>        <attribute>            <name> permissions</name>            <required>false</required>            <type>java.lang.string</type >        </attribute>    </tag></taglib>

　　

4. Using Permissiontaghandler

<gg:permissionPermissions= "User_list">                        <LiID= "Li_users_list"<c:if Test= "${modeltype== ' userlist '}">Class= "Active"</c:if>><ahref= "User/list.do"><spanclass= "Glyphicons glyphicons-group"></span>User List</a>                        </Li> </gg:permission>

User authentication based on JSP custom tags