一、相关配置
1.spring-redis.xml:
[java] view plain copy
- <?xml version="1.0" encoding="UTF-8"?>
- <beans xmlns="http://www.springframework.org/schema/beans"
- xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
- xmlns:context="http://www.springframework.org/schema/context"
- xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:cache="http://www.springframework.org/schema/cache"
- xsi:schemaLocation="http://www.springframework.org/schema/beans
- http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
- http://www.springframework.org/schema/context
- http://www.springframework.org/schema/context/spring-context-4.2.xsd
- http://www.springframework.org/schema/mvc
- http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
- http://www.springframework.org/schema/cache
- http://www.springframework.org/schema/cache/spring-cache-4.2.xsd">
- <context:property-placeholder location="classpath:redis.porperties" />
- <!-- 这里注入RedisUtil工具类,service层注解调用-->
- <context:component-scan base-package="com.xian.manager.util" />
- <!-- redis 相关配置 -->
- <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">
- <property name="maxIdle" value="${redis.maxIdle}" />
- <property name="maxWaitMillis" value="${redis.maxWait}" />
- <property name="testOnBorrow" value="${redis.testOnBorrow}" />
- </bean>
- <bean id="connectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
- <property name="poolConfig" ref="poolConfig" />
- <property name="port" value="${redis.port}" />
- <property name="hostName" value="${redis.host}" />
- <property name="password" value="${redis.pass}" />
- <property name="timeout" value="${redis.timeout}" />
- </bean>
- <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
- <property name="connectionFactory" ref="connectionFactory" />
- </bean>
- </beans>
使用的是RedisTemplate默认的JDK序列化策略。
2.相关工具类:
1).Redis工具类
[java] view plain copy
- package com.xian.manager.util;
- import java.util.List;
- import java.util.Map;
- import java.util.Set;
- import java.util.concurrent.TimeUnit;
- import javax.annotation.Resource;
- import org.springframework.data.redis.core.RedisTemplate;
- import org.springframework.stereotype.Component;
- import org.springframework.util.CollectionUtils;
- /**
- *
- * 基于spring和redis的redisTemplate工具类
- * 针对所有的hash 都是以h开头的方法
- * 针对所有的Set 都是以s开头的方法 不含通用方法
- * 针对所有的List 都是以l开头的方法
- */
- @Component
- public class RedisUtil {
- @Resource(name = "redisTemplate")
- private RedisTemplate<String, Object> redisTemplate;
- //=============================common============================
- /**
- * 指定缓存失效时间
- * @param key 键
- * @param time 时间(秒)
- * @return
- */
- public boolean expire(String key,long time){
- try {
- if(time>0){
- redisTemplate.expire(key, time, TimeUnit.SECONDS);
- }
- return true;
- } catch (Exception e) {
- e.printStackTrace();
- return false;
- }
- }
- /**
- * 根据key 获取过期时间
- * @param key 键 不能为null
- * @return 时间(秒) 返回0代表为永久有效
- */
- public long getExpire(String key){
- return redisTemplate.getExpire(key,TimeUnit.SECONDS);
- }
- /**
- * 判断key是否存在
- * @param key 键
- * @return true 存在 false不存在
- */
- public boolean hasKey(String key){
- try {
- return redisTemplate.hasKey(key);
- } catch (Exception e) {
- e.printStackTrace();
- return false;
- }
- }
- /**
- * 删除缓存
- * @param key 可以传一个值 或多个
- */
- @SuppressWarnings("unchecked")
- public void del(String ... key){
- if(key!=null&&key.length>0){
- if(key.length==1){
- redisTemplate.delete(key[0]);
- }else{
- redisTemplate.delete(CollectionUtils.arrayToList(key));
- }
- }
- }
- //============================String=============================
- /**
- * 普通缓存获取
- * @param key 键
- * @return 值
- */
- public Object get(String key){
- return key==null?null:redisTemplate.opsForValue().get(key);
- }
- /**
- * 普通缓存放入
- * @param key 键
- * @param value 值
- * @return true成功 false失败
- */
- public boolean set(String key,Object value) {
- try {
- redisTemplate.opsForValue().set(key, value);
- return true;
- } catch (Exception e) {
- e.printStackTrace();
- return false;
- }
- }
- /**
- * 普通缓存放入并设置时间
- * @param key 键
- * @param value 值
- * @param time 时间(秒) time要大于0 如果time小于等于0 将设置无限期
- * @return true成功 false 失败
- */
- public boolean set(String key,Object value,long time){
- try {
- if(time>0){
- redisTemplate.opsForValue().set(key, value, time, TimeUnit.SECONDS);
- }else{
- set(key, value);
- }
- return true;
- } catch (Exception e) {
- e.printStackTrace();
- return false;
- }
- }
- /**
- * 递增
- * @param key 键
- * @param by 要增加几(大于0)
- * @return
- */
- public long incr(String key, long delta){
- if(delta<0){
- throw new RuntimeException("递增因子必须大于0");
- }
- return redisTemplate.opsForValue().increment(key, delta);
- }
- /**
- * 递减
- * @param key 键
- * @param by 要减少几(小于0)
- * @return
- */
- public long decr(String key, long delta){
- if(delta<0){
- throw new RuntimeException("递减因子必须大于0");
- }
- return redisTemplate.opsForValue().increment(key, -delta);
- }
- //================================Map=================================
- /**
- * HashGet
- * @param key 键 不能为null
- * @param item 项 不能为null
- * @return 值
- */
- public Object hget(String key,String item){
- return redisTemplate.opsForHash().get(key, item);
- }
- /**
- * 获取hashKey对应的所有键值
- * @param key 键
- * @return 对应的多个键值
- */
- public Map<Object,Object> hmget(String key){
- return redisTemplate.opsForHash().entries(key);
- }
- /**
- * HashSet
- * @param key 键
- * @param map 对应多个键值
- * @return true 成功 false 失败
- */
- public boolean hmset(String key, Map<String,Object> map){
- try {
- redisTemplate.opsForHash().putAll(key, map);
- return true;
- } catch (Exception e) {
- e.printStackTrace();
- return false;
- }
- }
- /**
- * HashSet 并设置时间
- * @param key 键
- * @param map 对应多个键值
- * @param time 时间(秒)
- * @return true成功 false失败
- */
- public boolean hmset(String key, Map<String,Object> map, long time){
- try {
- redisTemplate.opsForHash().putAll(key, map);
- if(time>0){
- expire(key, time);
- }
- return true;
- } catch (Exception e) {
- e.printStackTrace();
- return false;
- }
- }
- /**
- * 向一张hash表中放入数据,如果不存在将创建
- * @param key 键
- * @param item 项
- * @param value 值
- * @return true 成功 false失败
- */
- public boolean hset(String key,String item,Object value) {
- try {
- redisTemplate.opsForHash().put(key, item, value);
- return true;
- } catch (Exception e) {
- e.printStackTrace();
- return false;
- }
- }
- /**
- * 向一张hash表中放入数据,如果不存在将创建
- * @param key 键
- * @param item 项
- * @param value 值
- * @param time 时间(秒) 注意:如果已存在的hash表有时间,这里将会替换原有的时间
- * @return true 成功 false失败
- */
- public boolean hset(String key,String item,Object value,long time) {
- try {
- redisTemplate.opsForHash().put(key, item, value);
- if(time>0){
- expire(key, time);
- }
- return true;
- } catch (Exception e) {
- e.printStackTrace();
- return false;
- }
- }
- /**
- * 删除hash表中的值
- * @param key 键 不能为null
- * @param item 项 可以使多个 不能为null
- */
- public void hdel(String key, Object... item){
- redisTemplate.opsForHash().delete(key,item);
- }
- /**
- * 判断hash表中是否有该项的值
- * @param key 键 不能为null
- * @param item 项 不能为null
- * @return true 存在 false不存在
- */
- public boolean hHasKey(String key, String item){
- return redisTemplate.opsForHash().hasKey(key, item);
- }
- /**
- * hash递增 如果不存在,就会创建一个 并把新增后的值返回
- * @param key 键
- * @param item 项
- * @param by 要增加几(大于0)
- * @return
- */
- public double hincr(String key, String item,double by){
- return redisTemplate.opsForHash().increment(key, item, by);
- }
- /**
- * hash递减
- * @param key 键
- * @param item 项
- * @param by 要减少记(小于0)
- * @return
- */
- public double hdecr(String key, String item,double by){
- return redisTemplate.opsForHash().increment(key, item,-by);
- }
- //============================set=============================
- /**
- * 根据key获取Set中的所有值
- * @param key 键
- * @return
- */
- public Set<Object> sGet(String key){
- try {
- return redisTemplate.opsForSet().members(key);
- } catch (Exception e) {
- e.printStackTrace();
- return null;
- }
- }
- /**
- * 根据value从一个set中查询,是否存在
- * @param key 键
- * @param value 值
- * @return true 存在 false不存在
- */
- public boolean sHasKey(String key,Object value){
- try {
- return redisTemplate.opsForSet().isMember(key, value);
- } catch (Exception e) {
- e.printStackTrace();
- return false;
- }
- }
- /**
- * 将数据放入set缓存
- * @param key 键
- * @param values 值 可以是多个
- * @return 成功个数
- */
- public long sSet(String key, Object...values) {
- try {
- return redisTemplate.opsForSet().add(key, values);
- } catch (Exception e) {
- e.printStackTrace();
- return 0;
- }
- }
- /**
- * 将set数据放入缓存
- * @param key 键
- * @param time 时间(秒)
- * @param values 值 可以是多个
- * @return 成功个数
- */
- public long sSetAndTime(String key,long time,Object...values) {
- try {
- Long count = redisTemplate.opsForSet().add(key, values);
- if(time>0) expire(key, time);
- return count;
- } catch (Exception e) {
- e.printStackTrace();
- return 0;
- }
- }
- /**
- * 获取set缓存的长度
- * @param key 键
- * @return
- */
- public long sGetSetSize(String key){
- try {
- return redisTemplate.opsForSet().size(key);
- } catch (Exception e) {
- e.printStackTrace();
- return 0;
- }
- }
- /**
- * 移除值为value的
- * @param key 键
- * @param values 值 可以是多个
- * @return 移除的个数
- */
- public long setRemove(String key, Object ...values) {
- try {
- Long count = redisTemplate.opsForSet().remove(key, values);
- return count;
- } catch (Exception e) {
- e.printStackTrace();
- return 0;
- }
- }
- //===============================list=================================
- /**
- * 获取list缓存的内容
- * @param key 键
- * @param start 开始
- * @param end 结束 0 到 -1代表所有值
- * @return
- */
- public List<Object> lGet(String key,long start, long end){
- try {
- return redisTemplate.opsForList().range(key, start, end);
- } catch (Exception e) {
- e.printStackTrace();
- return null;
- }
- }
- /**
- * 获取list缓存的长度
- * @param key 键
- * @return
- */
- public long lGetListSize(String key){
- try {
- return redisTemplate.opsForList().size(key);
- } catch (Exception e) {
- e.printStackTrace();
- return 0;
- }
- }
- /**
- * 通过索引 获取list中的值
- * @param key 键
- * @param index 索引 index>=0时, 0 表头,1 第二个元素,依次类推;index<0时,-1,表尾,-2倒数第二个元素,依次类推
- * @return
- */
- public Object lGetIndex(String key,long index){
- try {
- return redisTemplate.opsForList().index(key, index);
- } catch (Exception e) {
- e.printStackTrace();
- return null;
- }
- }
- /**
- * 将list放入缓存
- * @param key 键
- * @param value 值
- * @param time 时间(秒)
- * @return
- */
- public boolean lSet(String key, Object value) {
- try {
- redisTemplate.opsForList().rightPush(key, value);
- return true;
- } catch (Exception e) {
- e.printStackTrace();
- return false;
- }
- }
- /**
- * 将list放入缓存
- * @param key 键
- * @param value 值
- * @param time 时间(秒)
- * @return
- */
- public boolean lSet(String key, Object value, long time) {
- try {
- redisTemplate.opsForList().rightPush(key, value);
- if (time > 0) expire(key, time);
- return true;
- } catch (Exception e) {
- e.printStackTrace();
- return false;
- }
- }
- /**
- * 将list放入缓存
- * @param key 键
- * @param value 值
- * @param time 时间(秒)
- * @return
- */
- public boolean lSet(String key, List<Object> value) {
- try {
- redisTemplate.opsForList().rightPushAll(key, value);
- return true;
- } catch (Exception e) {
- e.printStackTrace();
- return false;
- }
- }
- /**
- * 将list放入缓存
- * @param key 键
- * @param value 值
- * @param time 时间(秒)
- * @return
- */
- public boolean lSet(String key, List<Object> value, long time) {
- try {
- redisTemplate.opsForList().rightPushAll(key, value);
- if (time > 0) expire(key, time);
- return true;
- } catch (Exception e) {
- e.printStackTrace();
- return false;
- }
- }
- /**
- * 根据索引修改list中的某条数据
- * @param key 键
- * @param index 索引
- * @param value 值
- * @return
- */
- public boolean lUpdateIndex(String key, long index,Object value) {
- try {
- redisTemplate.opsForList().set(key, index, value);
- return true;
- } catch (Exception e) {
- e.printStackTrace();
- return false;
- }
- }
- /**
- * 移除N个值为value
- * @param key 键
- * @param count 移除多少个
- * @param value 值
- * @return 移除的个数
- */
- public long lRemove(String key,long count,Object value) {
- try {
- Long remove = redisTemplate.opsForList().remove(key, count, value);
- return remove;
- } catch (Exception e) {
- e.printStackTrace();
- return 0;
- }
- }
- }
2).序列化反序列化工具类
[java] view plain copy
- package com.xian.manager.util;
- import java.io.ByteArrayInputStream;
- import java.io.ByteArrayOutputStream;
- import java.io.ObjectInputStream;
- import java.io.ObjectOutputStream;
- import org.apache.log4j.Logger;
- public class SerializeUtil {
- private static Logger logger = Logger.getLogger(SerializeUtil.class);
- /*
- * 序列化
- */
- public static byte[] serialize(Object object) {
- ObjectOutputStream oos = null;
- ByteArrayOutputStream baos = null;
- try {
- baos = new ByteArrayOutputStream();
- oos = new ObjectOutputStream(baos);
- oos.writeObject(object);
- byte[] bytes = baos.toByteArray();
- return bytes;
- } catch (Exception e) {
- logger.warn("序列化对象出现异常: ", e);
- }
- return null;
- }
- /*
- * 反序列化
- */
- public static Object deserialize(byte[] bytes) {
- ByteArrayInputStream bais = null;
- try {
- bais = new ByteArrayInputStream(bytes);
- ObjectInputStream ois = new ObjectInputStream(bais);
- return ois.readObject();
- } catch (Exception e) {
- logger.warn("反序列化对象出现异常: ", e);
- }
- return null;
- }
- }
3). 实体类与字节数组互转工具类
[java] view plain copy
- package com.xian.manager.util;
- import java.io.ByteArrayInputStream;
- import java.io.ByteArrayOutputStream;
- import java.io.IOException;
- import java.io.ObjectInputStream;
- import java.io.ObjectOutputStream;
- public class ObjectAndByteUtil {
- /**
- * 对象转数组
- * @param obj
- * @return
- */
- public static byte[] toByteArray (Object obj) {
- byte[] bytes = null;
- ByteArrayOutputStream bos = new ByteArrayOutputStream();
- try {
- ObjectOutputStream oos = new ObjectOutputStream(bos);
- oos.writeObject(obj);
- oos.flush();
- bytes = bos.toByteArray ();
- oos.close();
- bos.close();
- } catch (IOException ex) {
- ex.printStackTrace();
- }
- return bytes;
- }
- /**
- * 数组转对象
- * @param bytes
- * @return
- */
- public static Object toObject (byte[] bytes) {
- Object obj = null;
- try {
- ByteArrayInputStream bis = new ByteArrayInputStream (bytes);
- ObjectInputStream ois = new ObjectInputStream (bis);
- obj = ois.readObject();
- ois.close();
- bis.close();
- } catch (IOException ex) {
- ex.printStackTrace();
- } catch (ClassNotFoundException ex) {
- ex.printStackTrace();
- }
- return obj;
- }
- }
三、具体使用
1.设值:
User user = new User();
user.setUsername("夜gg");
user.setPassword("123456");
redisUtil.set("user", user);
注意点:实体类User需要实现Serializable接口,而且重写toString()方法。
[java] view plain copy
- package com.xian.manager.entity;
- import java.io.Serializable;
- public class User implements Serializable{
- private int id;
- private String username;
- private String password;
- private int sex;
- private int age;
- private int state;
- public User() {
- }
- public String getUsername() {
- return username;
- }
- public void setUsername(String username) {
- this.username = username;
- }
- public String getPassword() {
- return password;
- }
- public void setPassword(String password) {
- this.password = password;
- }
- public int getSex() {
- return sex;
- }
- public void setSex(int sex) {
- this.sex = sex;
- }
- public int getAge() {
- return age;
- }
- public void setAge(int age) {
- this.age = age;
- }
- public int getId() {
- return id;
- }
- public void setId(int id) {
- this.id = id;
- }
- public int getState() {
- return state;
- }
- public void setState(int state) {
- this.state = state;
- }
- @Override
- public String toString() {
- return "User [id=" + id + ", username=" + username + ", password=" + password + ", sex=" + sex + ", age=" + age
- + ", state=" + state + "]";
- }
- }
2.取值:
User user = (User) SerializeUtil.deserialize(ObjectAndByteUtil.toByteArray(redisUtil.get("user")));
System.out.println(user.getUsername());
使用可视化工具RedisDesktopManager查看(以字节数组的形式):