自定义 jstl 标签 fns:jsp中tld的function自定义方法扩展

短命女 2023-05-30 10:46 22阅读 0赞

转自：  [https://blog.csdn.net/FORLOVEHUAN/article/details/82623647][https_blog.csdn.net_FORLOVEHUAN_article_details_82623647]

自定义 jstl 标签 fns: [https://blog.csdn.net/swebin/article/details/90604790][https_blog.csdn.net_swebin_article_details_90604790]

自定义 jstl 标签 fns: [https://blog.csdn.net/moxiaoya1314/article/details/80483086][https_blog.csdn.net_moxiaoya1314_article_details_80483086]

jsp中引入方式

<%@ taglib prefix="fns" uri="/WEB-INF/tlds/fns.tld" %>  
1  
fns.tld写法示例

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

<description>JSTL 1.1 functions library</description>  
  <display-name>JSTL functions sys</display-name>  
  <tlib-version>1.1</tlib-version>  
  <short-name>fns</short-name>  
  <uri>http://java.sun.com/jsp/jstl/functionss</uri>

<function>  
    <description>获取管理路径</description>  
    <name>getAdminPath</name>  
      
    <function-class>com.us.yy.common.config.Global</function-class>  
      
    <function-signature>java.lang.String getAdminPath()</function-signature>  
      
    <example>$\{fns:getAdminPath()\}</example>  
  </function>

<function>  
    <description>获取配置</description>  
    <name>getConfig</name>  
    <function-class>com.us.yy.common.config.Global</function-class>  
    <function-signature>java.lang.String getConfig(java.lang.String)</function-signature>  
    <example>$\{fns:getConfig(key)\}</example>  
  </function>  
  <function>  
    <description>获取常量</description>  
    <name>getConst</name>  
    <function-class>com.us.yy.common.config.Global</function-class>  
    <function-signature>java.lang.Object getConst(java.lang.String)</function-signature>  
    <example>$\{fns:getConst(key)\}</example>  
  </function>

<function>  
    <description>获取当前用户对象</description>  
    <name>getUser</name>  
    <function-class>com.us.yy.modules.utils.UserUtils</function-class>  
    <function-signature>com.us.yy.modules.entity.User getUser()</function-signature>  
    <example>$\{fns:getUser()\}</example>    
  </function>

<function>  
    <description>获取当前用户的菜单对象列表</description>  
    <name>getMenuList</name>  
    <function-class>com.us.yy.modules.utils.UserUtils</function-class>  
    <function-signature>java.util.List getMenuList()</function-signature>  
    <example>$\{fns:getMenuList()\}</example>    
  </function>

<function>  
    <description>获取当前用户的菜单对象列表</description>  
    <name>getTopMenu</name>  
    <function-class>com.us.yy.modules.sys.utils.UserUtils</function-class>  
    <function-signature>com.us.yy.modules.entity.Menu getTopMenu()</function-signature>  
    <example>$\{fns:getTopMenu()\}</example>    
  </function>  
   <function>  
    <description>获取当前时间与指定时间的差值</description>  
    <name>getTime</name>  
    <function-class>com.us.yy.modules.utils.UserUtils</function-class>  
    <function-signature>java.util.Date getTime(java.util.Date)</function-signature>  
    <example>$\{fns:getTime(java.util.Date)\}</example>    
  </function>

<function>  
    <description>获取当前用户的部门对象列表</description>  
    <name>getOfficeList</name>  
    <function-class>com.us.yy.modules.utils.UserUtils</function-class>  
    <function-signature>java.util.List getOfficeList()</function-signature>  
    <example>$\{fns:getOfficeList()\}</example>    
  </function>

<function>  
    <description>获取当前用户缓存</description>  
    <name>getCache</name>  
    <function-class>com.us.yy.modules.utils.UserUtils</function-class>  
    <function-signature>java.lang.Object getCache(java.lang.String, java.lang.Object)</function-signature>  
    <example>$\{fns:getCache(cacheName, defaultValue)\}</example>    
  </function>

<function>  
    <description>获取字典标签</description>  
    <name>getDictLabel</name>  
    <function-class>com.us.yy.modules.sys.utils.DictUtils</function-class>  
    <function-signature>java.lang.String getDictLabel(java.lang.String, java.lang.String, java.lang.String)</function-signature>  
    <example>$\{fns:getDictLabel(value, type, defaultValue)\}</example>    
  </function>

<function>  
    <description>HTML编码</description>  
    <name>escapeHtml</name>  
    <function-class>com.us.yy.common.utils.Encodes</function-class>  
    <function-signature>java.lang.String escapeHtml(java.lang.String)</function-signature>  
    <example>$\{fns:escapeHtml(html)\}</example>    
  </function>  
  <function>  
    <description>HTML解码</description>  
    <name>unescapeHtml</name>  
    <function-class>com.us.yy.common.utils.Encodes</function-class>  
    <function-signature>java.lang.String unescapeHtml(java.lang.String)</function-signature>  
    <example>$\{fns:unescapeHtml(html)\}</example>    
  </function>

<function>  
    <description>获取当前日期</description>  
    <name>getDate</name>  
    <function-class>com.us.yy.common.utils.DateUtils</function-class>  
    <function-signature>java.lang.String getDate(java.lang.String)</function-signature>  
    <example>$\{fns:getDate(pattern)\}</example>    
  </function>

<function>  
    <description>对象转换JSON字符串</description>  
    <name>toJson</name>  
    <function-class>com.us.yy.common.mapper.JsonMapper</function-class>  
    <function-signature>java.lang.String toJsonString(java.lang.Object)</function-signature>  
    <example>$\{fns:toJson(object)\}</example>    
  </function>

</taglib>  
  
实体中

/\*\*  
     \* 获取当前用户授权菜单  
     \* @return  
     \*/  
    public static Menu getTopMenu()\{  
        Menu topMenu =  getMenuList();  
        return topMenu;  
    \}  
  
jsp中使用示例

$(document).ready(function() \{  
        var data = $\{fns:toJson(new Data())\};  
\});

<c:set var="ctx" value="$\{fns:getAdminPath()\}"/>

<t:oldMenu menu="$\{fns:getTopMenu()\}"></t:oldMenu> //下篇讲述自定义标签  
————————————————  
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原文链接：https://blog.csdn.net/FORLOVEHUAN/article/details/82623647

[https_blog.csdn.net_FORLOVEHUAN_article_details_82623647]: https://blog.csdn.net/FORLOVEHUAN/article/details/82623647
[https_blog.csdn.net_swebin_article_details_90604790]: https://blog.csdn.net/swebin/article/details/90604790
[https_blog.csdn.net_moxiaoya1314_article_details_80483086]: https://blog.csdn.net/moxiaoya1314/article/details/80483086