第一步:引入jar包
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< dependency >
< groupId >javax.servlet.jsp</ groupId >
< artifactId >jsp-api</ artifactId >
< version >2.2.1-b03</ version >
</ dependency >
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第二步:自定义标签类
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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;
}
}
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第三步:创建tld标签,放入在web-inf下
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<? 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 >
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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
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< dependency >
< groupId >net.mingsoft</ groupId >
< artifactId >shiro-freemarker-tags</ artifactId >
< version >0.1</ version >
</ dependency >
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二、注入FreeMarkerConfigurer,未指定templateLoaderPath时遇到过跳转到页面404问题
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@Bean
public 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;
}
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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服务器之家。
原文链接:https://blog.csdn.net/cutterwolf/article/details/78085808