springboot 自定义权限标签(tld),在freemarker引用操作

第一步:引入jar包

<dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2.1-b03</version> </dependency>

第二步:自定义标签类

import java.util.Map;import java.util.Set;import javax.servlet.http.HttpServletRequest;import org.jasig.cas.client.authentication.AttributePrincipal;import org.springframework.web.servlet.tags.RequestContextAwareTag;import com.goodidea.sso.dto.PrivilegesDto;import com.goodidea.sso.dto.ResourcesDto;import com.goodidea.sso.service.PrivilegesService;/** * * @ClassName: PrivilegeTag * @Description: 权限标签类 * @author lsg* @date 2017年9月12日 下午5:36:01 * */public class PrivilegeTag extends RequestContextAwareTag{ private static final long serialVersionUID = 534416848523276042L; private String menuAlias; private String priAlias; public String getMenuAlias() { return menuAlias; } public void setMenuAlias(String menuAlias) { this.menuAlias = menuAlias; } public String getPriAlias() { return priAlias; } public void setPriAlias(String priAlias) { this.priAlias = priAlias; } @Override protected int doStartTagInternal() { // TODO Auto-generated method stub boolean result = false; try { HttpServletRequest request = (HttpServletRequest) pageContext.getRequest(); AttributePrincipal principal = (AttributePrincipal)request.getUserPrincipal(); Map<String, Object> attributes = principal.getAttributes(); String username=(String) attributes.get('username'); PrivilegesService privilegesService= (PrivilegesService)this.getRequestContext().getWebApplicationContext().getBean('privilegesServiceImpl'); Set<ResourcesDto> dto = privilegesService.findResourcesByUsername(username); for (ResourcesDto resourcesDto : dto) {if(this.menuAlias.equals(resourcesDto.getAlias())){ for (PrivilegesDto pdto : resourcesDto.getPrivileges()) { if(this.priAlias.equals(pdto.getAlias())){ result = true; } }} } } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); result =false; } return result? EVAL_BODY_INCLUDE : SKIP_BODY; }}

第三步:创建tld标签,放入在web-inf下

<?xml version='1.0' encoding='UTF-8'?><!DOCTYPE taglib PUBLIC '-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.1//EN' 'http://java.sun.com/j2ee/dtds/web-jsptaglibrary_1_1.dtd'><taglib> <tlibversion>1.0</tlibversion> <jspversion>1.1</jspversion> <shortname>privilege</shortname> <tag> <name>privilege</name> <tagclass>com.goodidea.sso.core.PrivilegeTag</tagclass> <bodycontent>empty</bodycontent> <!--这里如果设为empty,则无body--> <attribute> <name>menuAlias</name> <required>true</required> <rtexprvalue>true</rtexprvalue> </attribute> <attribute> <name>priAlias</name> <required>true</required> <rtexprvalue>true</rtexprvalue> </attribute> </tag></taglib>

第四:页面引用

<#assign p=JspTaglibs['/WEB-INF/tld/privilege.tld'] />

注意tld,如果不在web.xml上进行引入的话,就放在web-inf下,要不然会报找不到tld资源异常

补充知识：Springboot项目 freemarker 引入shiro 标签

springboot集成shiro权限过程略过

一、添加maven 依赖

<dependency> <groupId>net.mingsoft</groupId> <artifactId>shiro-freemarker-tags</artifactId> <version>0.1</version></dependency>

二、注入FreeMarkerConfigurer，未指定templateLoaderPath时遇到过跳转到页面404问题

@Beanpublic FreeMarkerConfigurer freeMarkerConfigurer() throws IOException, TemplateException { FreeMarkerConfigurer freeMarkerConfigurer = new FreeMarkerConfigurer(); freeMarkerConfigurer.setTemplateLoaderPath('classpath:templates/'); freemarker.template.Configuration configuration = freeMarkerConfigurer.createConfiguration(); configuration.setDefaultEncoding('UTF-8'); //这里可以添加其他共享变量 比如sso登录地址 configuration.setSharedVariable('shiro', new ShiroTags()); freeMarkerConfigurer.setConfiguration(configuration); return freeMarkerConfigurer;}

三、shiro标签

1、session中读取登录人信息

<@shiro.principal/>

2、带有loginName属性的对象转换为Prinipal后保存在session

<shiro:principal property='loginName' />

3、带有loginName属性的Json(个人使用的是FashJson对象)转换为Prinipal后保存在session，使用freemarker标签处理Json

<#assign loginInfo><@shiro.principal/></#assign>

<#assign data=loginInfo?eval>

用户：${data.loginName!''}

4、其他shiro标签使用

<@shiro.hasPermission name='权限编码'>...</@shiro.hasPermission>

以上这篇springboot 自定义权限标签(tld),在freemarker引用操作就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持好吧啦网。