jstl自定义函数

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1.自定义函数类

package com.dq.oa.web;

import com.dq.oa.manager.ACLManager;

/**
* jstl 函数，主要功能计时认证
* */
public class SecurityFunctions {
private static ACLManager aclManager;

public static boolean hasPermission(int userId, String reourceSn,
int permission) {
return aclManager.hasPermissionByResourceSn(userId, reourceSn,
permission);

}

// 不可以是静态的静态的spring注入不进去

public ACLManager getAclManager() {
return aclManager;
}

public void setAclManager(ACLManager aclManager) {
SecurityFunctions.aclManager = aclManager;
}

}

2编写tld文件

<?xml version="1.0" encoding="UTF-8" ?>

<taglib xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"
version="2.0">

<tlib-version>1.0</tlib-version>
<short-name>my</short-name>
<uri>http://www.dq.com/oa/functions</uri>

<function>
<name>hasPermission</name>
<function-class>com.dq.oa.web.SecurityFunctions</function-class>
<function-signature>boolean hasPermission(int, java.lang.String,int)</function-signature>
</function>

</taglib>

3.在jsp文件中调用

<c:if test="${my:hasPermission(login.id,'person',3)}">
<a href="#"
onclick="del('person.do?method=del&id=${person.id }')">删除</a> |
</c:if>