Shiro  我们通过重写AbstractSessionDAO ，来实现 Session  共享。再重写 Session  的时候（其实也不算重写），因为和HttpSession 没有任何实现或者继承关系。

首先 Shiro   Session  配置讲解。

Session  的每个回话的ID 生成器，我们用JavaUuidSessionIdGenerator （UUID 规则）。

1. <!-- 会话Session ID生成器 -->
2. <bean id="sessionIdGenerator" class="org.apache.shiro.session.mgt.eis.JavaUuidSessionIdGenerator"/>

Session  的创建、获取、删除

1. <!-- session 创建、删除、查询 -->
2. <bean id="jedisShiroSessionRepository" class="com.sojson.core.shiro.cache.JedisShiroSessionRepository" >
3. <property name="jedisManager" ref="jedisManager"/>
4. </bean>

Session  的监听生命周期

1. <!-- custom shiro session listener -->
2. <bean id="customShiroSessionDAO" class="com.sojson.core.shiro.CustomShiroSessionDAO">
3. <property name="shiroSessionRepository" ref="jedisShiroSessionRepository"/>
4. <property name="sessionIdGenerator" ref="sessionIdGenerator"/>
5. </bean>

Session  定时管理器（有效期）

1. <!-- 会话验证调度器 -->
2. <bean id="sessionValidationScheduler" class="org.apache.shiro.session.mgt.ExecutorServiceSessionValidationScheduler">
3. <property name="interval" value="${session.validate.timespan}"/><!--检测时间间距，默认是60分钟-->
4. <property name="sessionManager" ref="sessionManager"/>
5. </bean>

Session   cookie  模版配置

1. <!-- 会话Cookie模板 -->
2. <bean id="sessionIdCookie" class="org.apache.shiro.web.servlet.SimpleCookie">
3. <!--cookie的name，我故意取名叫xxxxbaidu -->
4. <constructor-arg value="v_v-s-baidu"/>
5. <property name="httpOnly" value="true"/>
6. <!--cookie的有效时间 -->
7. <property name="maxAge" value="-1"/>
8. <!-- 配置存储Session Cookie的domain为 一级域名 -->
9. <property name="domain" value=".itboy.net"/>
10. </bean>

Session  Manager 配置

1. <!-- Session Manager -->
2. <bean id="sessionManager" class="org.apache.shiro.web.session.mgt.DefaultWebSessionManager">
3. <!-- 相隔多久检查一次session的有效性 -->
4. <property name="sessionValidationInterval" value="1800000"/>
5. <!-- session 有效时间为半小时 （毫秒单位）-->
6. <property name="globalSessionTimeout" value="1800000"/>
7. <property name="sessionDAO" ref="customShiroSessionDAO"/>
8. <!-- session 监听，可以多个。 -->
9. <property name="sessionListeners">
10. <list>
11. <ref bean="customSessionListener"/>
12. </list>
13. </property>
14. <!-- 间隔多少时间检查，不配置是60分钟 -->
15. <property name="sessionValidationScheduler" ref="sessionValidationScheduler"/>
16. <!-- 是否开启 检测，默认开启 -->
17. <property name="sessionValidationSchedulerEnabled" value="true"/>
18. <!-- 是否删除无效的，默认也是开启 -->
19. <property name="deleteInvalidSessions" value="true"/>
20. <!-- 会话Cookie模板 -->
21. <property name="sessionIdCookie" ref="sessionIdCookie"/>
22. </bean>

Session  的创建、删除、查询 ，ShiroSessionRepository 接口定义。

1. package com.sojson.core.shiro.session;
2.  
3. import org.apache.shiro.session.Session;
4.  
5. import java.io.Serializable;
6. import java.util.Collection;
7.  
8. /**
9. * custom shiro session manager interface
10. *
11. * @author zhoubaicheng
12. */
13. public interface ShiroSessionRepository {
14.  
15. /**
16. * 存储Session
17. * @param session
18. */
19. void saveSession(Session session);
20. /**
21. * 删除session
22. * @param sessionId
23. */
24. void deleteSession(Serializable sessionId);
25. /**
26. * 获取session
27. * @param sessionId
28. * @return
29. */
30. Session getSession(Serializable sessionId);
31. /**
32. * 获取所有sessoin
33. * @return
34. */
35. Collection<Session> getAllSessions();
36. }

Session  的创建、删除、查询实现。com.sojson.core.shiro.cache.JedisShiroSessionRepository

1. package com.sojson.core.shiro.cache;
2.  
3. import java.io.Serializable;
4. import java.util.Collection;
5.  
6. import org.apache.log4j.Logger;
7. import org.apache.shiro.session.Session;
8.  
9. import com.sojson.common.utils.SerializeUtil;
10. import com.sojson.core.shiro.session.ShiroSessionRepository;
11. /**
12. * Session 管理
13. * @author sojson.com
14. *
15. */
16. @SuppressWarnings("unchecked")
17. public class JedisShiroSessionRepository implements ShiroSessionRepository {
18. private static Logger logger = Logger.getLogger(JedisShiroSessionRepository.class);
19. public static final String REDIS_SHIRO_SESSION = "sojson-shiro-session:";
20. //这里有个小BUG，因为Redis使用序列化后，Key反序列化回来发现前面有一段乱码，解决的办法是存储缓存不序列化
21. public static final String REDIS_SHIRO_ALL = "*sojson-shiro-session:*";
22. private static final int SESSION_VAL_TIME_SPAN = 18000;
23. private static final int DB_INDEX = 1;
24.  
25. private JedisManager jedisManager;
26.  
27. @Override
28. public void saveSession(Session session) {
29. if (session == null || session.getId() == null)
30. throw new NullPointerException("session is empty");
31. try {
32. byte[] key = SerializeUtil.serialize(buildRedisSessionKey(session.getId()));
33. byte[] value = SerializeUtil.serialize(session);
34. long sessionTimeOut = session.getTimeout() / 1000;
35. Long expireTime = sessionTimeOut + SESSION_VAL_TIME_SPAN + (5 * 60);
36. getJedisManager().saveValueByKey(DB_INDEX, key, value, expireTime.intValue());
37. } catch (Exception e) {
38. e.printStackTrace();
39. System.out.println("save session error");
40. }
41. }
42.  
43. @Override
44. public void deleteSession(Serializable id) {
45. if (id == null) {
46. throw new NullPointerException("session id is empty");
47. }
48. try {
49. getJedisManager().deleteByKey(DB_INDEX,
50. SerializeUtil.serialize(buildRedisSessionKey(id)));
51. } catch (Exception e) {
52. e.printStackTrace();
53. System.out.println("delete session error");
54. }
55. }
56.  
57.  
58. @Override
59. public Session getSession(Serializable id) {
60. if (id == null)
61. throw new NullPointerException("session id is empty");
62. Session session = null;
63. try {
64. byte[] value = getJedisManager().getValueByKey(DB_INDEX, SerializeUtil
65. .serialize(buildRedisSessionKey(id)));
66. session = SerializeUtil.deserialize(value, Session.class);
67. } catch (Exception e) {
68. e.printStackTrace();
69. System.out.println("get session error");
70. }
71. return session;
72. }
73.  
74. @Override
75. public Collection<Session> getAllSessions() {
76. Collection<Session> sessions = null;
77. try {
78. sessions = getJedisManager().AllSession(DB_INDEX,REDIS_SHIRO_SESSION);
79. } catch (Exception e) {
80. logger.error("获取全部session异常");
81. e.printStackTrace();
82. }
83.  
84. return sessions;
85. }
86.  
87. private String buildRedisSessionKey(Serializable sessionId) {
88. return REDIS_SHIRO_SESSION + sessionId;
89. }
90.  
91. public JedisManager getJedisManager() {
92. return jedisManager;
93. }
94.  
95. public void setJedisManager(JedisManager jedisManager) {
96. this.jedisManager = jedisManager;
97. }
98. }

CustomShiroSessionDAO的继承实现

1. package com.sojson.core.shiro;
2.  
3. import java.io.Serializable;
4. import java.util.Collection;
5.  
6. import org.apache.log4j.Logger;
7. import org.apache.shiro.session.Session;
8. import org.apache.shiro.session.UnknownSessionException;
9. import org.apache.shiro.session.mgt.eis.AbstractSessionDAO;
10.  
11. import com.sojson.core.shiro.session.ShiroSessionRepository;
12.  
13. public class CustomShiroSessionDAO extends AbstractSessionDAO{
14.  
15. private static Logger logger = Logger.getLogger(CustomShiroSessionDAO.class);
16.  
17. private ShiroSessionRepository shiroSessionRepository;
18.  
19. public ShiroSessionRepository getShiroSessionRepository() {
20. return shiroSessionRepository;
21. }
22.  
23. public void setShiroSessionRepository(
24. ShiroSessionRepository shiroSessionRepository) {
25. this.shiroSessionRepository = shiroSessionRepository;
26. }
27.  
28. @Override
29. public void update(Session session) throws UnknownSessionException {
30. getShiroSessionRepository().saveSession(session);
31. }
32.  
33. @Override
34. public void delete(Session session) {
35. if (session == null) {
36. logger.error(
37. "session can not be null,delete failed");
38. return;
39. }
40. Serializable id = session.getId();
41. if (id != null)
42. getShiroSessionRepository().deleteSession(id);
43. }
44.  
45. @Override
46. public Collection<Session> getActiveSessions() {
47. return getShiroSessionRepository().getAllSessions();
48. }
49.  
50. @Override
51. protected Serializable doCreate(Session session) {
52. Serializable sessionId = this.generateSessionId(session);
53. this.assignSessionId(session, sessionId);
54. getShiroSessionRepository().saveSession(session);
55. return sessionId;
56. }
57.  
58. @Override
59. protected Session doReadSession(Serializable sessionId) {
60. return getShiroSessionRepository().getSession(sessionId);
61. } }