SpringSession通过Redis统计在线用户数量的实现代码

class RemoteUserRequestWrapper extends HttpServletRequestWrapper {
		String userCode;
		RemoteUserRequestWrapper(HttpServletRequest request) {
			super(request);
			this.userCode = (String) request.getSession()
					.getAttribute(org.apache.commons.lang3.StringUtils.isBlank(sessionKeyName)?DEFAULT_SESSION_KEY_NAME:sessionKeyName);
		}
		@Override
		public String getRemoteUser() {
			return userCode;
		}
	}

Set<String> keys = RedisUtils.redisTemplate.keys("spring:session:sessions:*");
for(String key : keys){
	if(key.indexOf("expires")==-1){
		String s = (String)RedisUtils.redisTemplate.opsForHash().get(key, "sessionAttr:ssoLoginUser");
		if(request.getRemoteUser().equals(s)) {
			logger.info("loginusername:{}",s)
			RedisUtils.redisTemplate.opsForHash().delete(key, "sessionAttr:ssoLoginUser");
		}
	}
}

  List<Map<String,Object>> list = new ArrayList<Map<String, Object>>();
  List<Map<String,Object>> data = new ArrayList<Map<String, Object>>();
  Set<String> keys = redisTemplate.keys("spring:session:sessions:*");
  for(String key : keys){
      if(key.indexOf("expires")==-1){
          String s = (String)redisTemplate.opsForHash().get(key, "sessionAttr:ssoLoginUser");
          if(StringUtils.isNotBlank(s)) {
              System.out.println(s);
              Map<String,Object> map = new HashMap<String,Object>(16);
              map.put("usercode", s);
              list.add(map);
          }
      }
  }
  return list;

<dependency>
	<groupId>org.springframework.session</groupId>
	<artifactId>spring-session-data-redis</artifactId>
	<version>1.2.2.RELEASE</version>
	<type>pom</type>
</dependency>

<dependency>
	<groupId>biz.paluch.redis</groupId>
	<artifactId>lettuce</artifactId>
	<version>3.5.0.Final</version>
</dependency>

package com.common.utils.redis;

import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.WEB.context.ContextLoader;
import org.springframework.web.context.WebApplicationContext;

import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;

public class RedisUtils {

	private RedisUtils() {
	}

	@SuppressWarnings("unchecked")
	public static RedisTemplate<String, Object> redisTemplate =
			ContextLoader.getCurrentWebApplicationContext().getBean(RedisTemplate.class);

	
	public static boolean expire(final String key, final long timeout) {

		return expire(key, timeout, TimeUnit.SECONDS);
	}

	
	public static boolean expire(final String key, final long timeout, final TimeUnit unit) {

		Boolean ret = redisTemplate.expire(key, timeout, unit);
		return ret != null && ret;
	}

	
	public static boolean del(final String key) {

		redisTemplate.delete(key);
		return true;
	}

	
	public static long del(final Collection<String> keys) {

		redisTemplate.delete(keys);
		return 0;
	}

	
	public static void set(final String key, final Object value) {

		redisTemplate.opsForValue().set(key, value, 1, TimeUnit.MINUTES);
	}

	// 存储普通对象操作

	
	public static void set(final String key, final Object value, final long timeout) {

		redisTemplate.opsForValue().set(key, value, timeout, TimeUnit.SECONDS);
	}

	
	public static Object get(final String key) {

		return redisTemplate.opsForValue().get(key);
	}

	// 存储Hash操作

	
	public static void hPut(final String key, final String hKey, final Object value) {

		redisTemplate.opsForHash().put(key, hKey, value);
	}

	
	public static void hPutAll(final String key, final Map<String, Object> values) {

		redisTemplate.opsForHash().putAll(key, values);
	}

	
	public static Object hGet(final String key, final String hKey) {

		return redisTemplate.opsForHash().get(key, hKey);
	}

	
	public static List<Object> hMultiGet(final String key, final Collection<Object> hKeys) {

		return redisTemplate.opsForHash().multiGet(key, hKeys);
	}

	// 存储Set相关操作

	
	public static long sSet(final String key, final Object... values) {
		Long count = redisTemplate.opsForSet().add(key, values);
		return count == null ? 0 : count;
	}

	
	public static long sDel(final String key, final Object... values) {
		Long count = redisTemplate.opsForSet().remove(key, values);
		return count == null ? 0 : count;
	}

	// 存储List相关操作

	
	public static long lPush(final String key, final Object value) {
		Long count = redisTemplate.opsForList().rightPush(key, value);
		return count == null ? 0 : count;
	}

	
	public static long lPushAll(final String key, final Collection<Object> values) {
		Long count = redisTemplate.opsForList().rightPushAll(key, values);
		return count == null ? 0 : count;
	}

	
	public static long lPushAll(final String key, final Object... values) {
		Long count = redisTemplate.opsForList().rightPushAll(key, values);
		return count == null ? 0 : count;
	}

	
	public static List<Object> lGet(final String key, final int start, final int end) {
		return redisTemplate.opsForList().range(key, start, end);
	}
}