初识shiro

1、shiro
 介绍：简单的java安全框架，旨在提供一个直观而全面的认证，授权，加密及回话管理的解决方案。
 它通过简单易用的api为项目提供安全性而又无需重头编写代码。

  1 import org.apache.shiro.SecurityUtils;
  2 import org.apache.shiro.authc.*;
  3 import org.apache.shiro.config.IniSecurityManagerFactory;
  4 import org.apache.shiro.mgt.SecurityManager;
  5 import org.apache.shiro.session.Session;
  6 import org.apache.shiro.subject.Subject;
  7 import org.apache.shiro.util.Factory;
  8 import org.slf4j.Logger;
  9 import org.slf4j.LoggerFactory;
 10
 11
 12 /**
 13  * Simple Quickstart application showing how to use Shiro‘s API.
 14  *
 15  * @since 0.9 RC2
 16  */
 17 public class Quickstart {
 18
 19     private static final transient Logger log = LoggerFactory.getLogger(Quickstart.class);
 20     //指定类初始化日志对象
 21
 22     public static void main(String[] args) {
 23
 24         // The easiest way to create a Shiro SecurityManager with configured
 25         // realms, users, roles and permissions is to use the simple INI config.
 26         // We‘ll do that by using a factory that can ingest a .ini file and
 27         // return a SecurityManager instance:
 28
 29         // Use the shiro.ini file at the root of the classpath
 30         // (file: and url: prefixes load from files and urls respectively):
 31         Factory<SecurityManager> factory = new IniSecurityManagerFactory("classpath:shiro.ini");
 32         SecurityManager securityManager = factory.getInstance();
 33
 34         // for this simple example quickstart, make the SecurityManager
 35         // accessible as a JVM singleton.  Most applications wouldn‘t do this
 36         // and instead rely on their container configuration or web.xml for
 37         // webapps.  That is outside the scope of this simple quickstart, so
 38         // we‘ll just do the bare minimum so you can continue to get a feel
 39         // for things.
 40         SecurityUtils.setSecurityManager(securityManager);
 41
 42         // Now that a simple Shiro environment is set up, let‘s see what you can do:
 43
 44         // get the currently executing user:
 45         Subject currentUser = SecurityUtils.getSubject();
 46
 47         // Do some stuff with a Session (no need for a web or EJB container!!!)
 48         Session session = currentUser.getSession();
 49         session.setAttribute("someKey", "aValue");
 50         String value = (String) session.getAttribute("someKey");
 51         if (value.equals("aValue")) {
 52             log.info("Retrieved the correct value! [" + value + "]");
 53         }
 54
 55         // let‘s login the current user so we can check against roles and permissions:
 56         if (!currentUser.isAuthenticated()) {
 57             UsernamePasswordToken token = new UsernamePasswordToken("lonestarr", "vespa");
 58             token.setRememberMe(true);
 59             try {
 60                 currentUser.login(token);
 61             } catch (UnknownAccountException uae) {
 62                 log.info("There is no user with username of " + token.getPrincipal());
 63             } catch (IncorrectCredentialsException ice) {
 64                 log.info("Password for account " + token.getPrincipal() + " was incorrect!");
 65             } catch (LockedAccountException lae) {
 66                 log.info("The account for username " + token.getPrincipal() + " is locked.  " +
 67                         "Please contact your administrator to unlock it.");
 68             }
 69             // ... catch more exceptions here (maybe custom ones specific to your application?
 70             catch (AuthenticationException ae) {
 71                 //unexpected condition?  error?
 72             }
 73         }
 74
 75         //say who they are:
 76         //print their identifying principal (in this case, a username):
 77         log.info("User [" + currentUser.getPrincipal() + "] logged in successfully.");
 78
 79         //test a role:
 80         if (currentUser.hasRole("schwartz")) {
 81             log.info("May the Schwartz be with you!");
 82         } else {
 83             log.info("Hello, mere mortal.");
 84         }
 85
 86         //test a typed permission (not instance-level)
 87         if (currentUser.isPermitted("lightsaber:weild")) {
 88             log.info("You may use a lightsaber ring.  Use it wisely.");
 89         } else {
 90             log.info("Sorry, lightsaber rings are for schwartz masters only.");
 91         }
 92
 93         //a (very powerful) Instance Level permission:
 94         if (currentUser.isPermitted("winnebago:drive:eagle5")) {
 95             log.info("You are permitted to ‘drive‘ the winnebago with license plate (id) ‘eagle5‘.  " +
 96                     "Here are the keys - have fun!");
 97         } else {
 98             log.info("Sorry, you aren‘t allowed to drive the ‘eagle5‘ winnebago!");
 99         }
100
101         //all done - log out!
102         //
103         currentUser.logout();
104
105         System.exit(0);
106     }
107 }

只是Apache提供的一个简单使用的示例，可以参考一下，今后项目遇到上手很简单。