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redis入门，百度网盘
链接: https://pan.baidu.com/s/11onVTGqf7uyCGxkoQOxdTw 密码: csef
1 redis.properties
直接配置在classpath下面
#*****************jedis连接参数设置*********************#
#redis服务器ip #
#测试环境
#redis.ip=192.168.87.211
#正式环境
redis.ip=139.198.126.229
#redis服务器端口号#
redis.port=6479
#redis 测试密码 password
#redis.password=hesvit*0522
#线上redies密码
redis.password=hesvit
#************************jedis池参数设置*******************#
#jedis的最大分配对象#
jedis.pool.maxActive=300
#jedis最大保存idel状态对象数 #
jedis.pool.maxIdle=1000
#jedis池没有对象返回时，最大等待时间 #
jedis.pool.maxWait=1500
#jedis调用borrowObject方法时，是否进行有效检查#
jedis.pool.testOnBorrow=true
#jedis调用returnObject方法时，是否进行有效检查 #
jedis.pool.testOnReturn=true2 RedisPool.java
package com.hesvit.common.util;
import java.io.IOException;
import java.util.Properties;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
public class MyJedisPool {
private static Logger logger = LoggerFactory.getLogger(MyJedisPool.class);
private static JedisPool pool;
// 静态代码初始化池配置
static {
try {
Properties props = new Properties();
props.load(MyJedisPool.class.getClassLoader().getResourceAsStream("redis.properties"));
// 创建jedis池配置实例
JedisPoolConfig config = new JedisPoolConfig();
// 设置池配置项值
// config.setMaxActive(Integer.valueOf(props.getProperty("jedis.pool.maxActive")));
/*
* config.setMaxIdle(Integer.valueOf(props.getProperty(
* "jedis.pool.maxIdle")));
*
* config.setMaxWaitMillis(Long.valueOf(props.getProperty(
* "jedis.pool.maxWait")));
*
* config.setTestOnBorrow(Boolean.valueOf(props.getProperty(
* "jedis.pool.testOnBorrow")));
*
* config.setTestOnReturn(Boolean.valueOf(props.getProperty(
* "jedis.pool.testOnReturn")));
*/
config.setMaxTotal(200);
config.setMaxIdle(50);
config.setMinIdle(8);// 设置最小空闲数
config.setMaxWaitMillis(10000);
config.setTestOnBorrow(true);
config.setTestOnReturn(true);
// Idle时进行连接扫描
config.setTestWhileIdle(true);
// 表示idle object evitor两次扫描之间要sleep的毫秒数
config.setTimeBetweenEvictionRunsMillis(30000);
// 表示idle object evitor每次扫描的最多的对象数
config.setNumTestsPerEvictionRun(10);
// 表示一个对象至少停留在idle状态的最短时间，然后才能被idle object
// evitor扫描并驱逐；这一项只有在timeBetweenEvictionRunsMillis大于0时才有意义
config.setMinEvictableIdleTimeMillis(60000);
// 根据配置实例化jedis池
// pool = new JedisPool(config, props.getProperty("redis.ip"),
// Integer.valueOf(props.getProperty("redis.port")));
String password = props.getProperty("redis.password");
if (StringUtils.isBlank(password)) {
password = null;
}
pool = new JedisPool(config, props.getProperty("redis.ip"),
Integer.valueOf(props.getProperty("redis.port")), 3000, password);
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 获得jedis对象
*
*/
public synchronized static Jedis getJedisObject() {
logger.info("获取redies");
Jedis jedis = null;
if (pool != null) {
try {
jedis = pool.getResource();
} catch (Exception e) {
logger.error(e.getMessage(), e);
}
}
return jedis;
}
/**
* 归还jedis对象
*
*/
public synchronized static void recycleJedisOjbect(Jedis jedis) {
logger.info("释放资源.....");
if (jedis != null) {
jedis.close();
}
}
/**
*
* 测试jedis池方法
*
*/
public static void main(String[] args) {
// Properties props = new Properties();
// System.out.println(props.getProperty("jedis.pool.maxIdle"));
Jedis jedis = getJedisObject();// 获得jedis实例
// 获取jedis实例后可以对redis服务进行一系列的操作
jedis.set("name", "zhuxun");
jedis.expire("name", 5000);
System.out.println(jedis.get("name"));
jedis.del("name");
System.out.println(jedis.exists("name"));
recycleJedisOjbect(jedis); // 将 获取的jedis实例对象还回池中
}
}
3 redisUtil.java的使用
实际项目的一个例子
@Component
public class RedisUtil {
// 缓存所有App用户
private static String ALL_APP_USERS = "all_app_users";
/**
* 获取所有的APP 用户
* liuping
*/
@SuppressWarnings({ "deprecation", "unchecked" })
public static List<User> getAllAppUsers() {
Jedis redis = MyJedisPool.getJedisObject();// 获得jedis实例
List<User> users = new ArrayList<>();
try {
String strAppUser = redis.get(ALL_APP_USERS);
if (StringUtils.isBlank(strAppUser)) {
users = refreshAppUser(redis);
} else {
JSONArray jsonArray = JSONArray.fromObject(strAppUser);
users = JSONArray.toList(jsonArray, User.class);
}
} catch (Exception e) {
logger.error("Failed to get app user from redis: {}", e.getMessage());
} finally {
MyJedisPool.recycleJedisOjbect(redis);
}
return users;
}
/**
* 刷新App用户列表
* liuping
*/
public static List<User> refreshAppUser(Jedis redis) {
if (redis == null)
redis = MyJedisPool.getJedisObject();// 获得jedis实例
List<User> users = new ArrayList<>();
try {
User user = new User();
user.setLimit(-1);
WebApplicationContext context = ContextLoader.getCurrentWebApplicationContext();
UserService service = (UserService) context.getBean("userService");
users = service.selectByIndex(user);
if (null != users) {
JSONArray jsonArray = JSONArray.fromObject(users);
String struser = String.valueOf(jsonArray);
redis.set(ALL_APP_USERS, struser);
redis.expire(ALL_APP_USERS, EXPIRE_2_HOUR); // 设置过期时间
}
} catch (Exception e) {
logger.error("Failed to get wxuser from redis: {}", e.getMessage());
} finally {
MyJedisPool.recycleJedisOjbect(redis);
}
return users;
}