java使用Redis数据库缓存
一、java 代码部分
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import org.springframework.data.redis.core.ListOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.util.CollectionUtils;
public class RedisUtil {
private static RedisTemplate<String, Object> redisTemplate;
/**
* TODO: 初始化RedisTemplate
*/
public static void initRedisTemplate(final RedisTemplate<String, Object> sprintRedisTemplate) {
redisTemplate = sprintRedisTemplate;
}
/**
* @param <T>
* @description 获取 redis中的对象
* @param
* @return void
* @throws
*/
public static <T> T redisQueryObject(final RedisTemplate<String, Object> redisTemplate, final String key) {
ValueOperations<String, Object> ops = redisTemplate.opsForValue();
return (T) ops.get(key);
}
/**
* @description 删除redis中指定的key
* @param
* @return void
* @throws
*/
public static void redisDeleteKey(final RedisTemplate<String, Object> redisTemplate, final String key) {
redisTemplate.delete(key);
}
/**
* @description 保存对象到redis
* @param key
* @return object
* @throws
*/
public static void redisSaveObject(final RedisTemplate<String, Object> redisTemplate, final String key,
final Object object) {
ValueOperations<String, Object> ops = redisTemplate.opsForValue();
ops.getAndSet(key, object);
}
/**
* @description 保存对象到redis
* @param key
* @return object
* @throws
*/
public static void redisSaveObject(final RedisTemplate<String, Object> redisTemplate, final String key,
final Object object, int time) {
ValueOperations<String, Object> ops = redisTemplate.opsForValue();
ops.set(key, object, time, TimeUnit.MINUTES);
}
/**
* @description redis保存数据到list
* @param
* @return void
* @throws
*/
public static void redisSaveList(final RedisTemplate<String, Object> redisTemplate, final String key,
final Object object, int count) {
ListOperations<String, Object> ops = redisTemplate.opsForList();
ops.leftPush(key, object);
if (0 < count)
ops.trim(key, 0, count);
}
/**
* @param <T>
* @description 获取 redis中的list对象
* @param
* @return
* @throws
*/
public static <T> List<T> redisQueryList(final RedisTemplate<String, Object> redisTemplate, final String key,
Class<T> claxx) {
ListOperations<String, Object> ops = redisTemplate.opsForList();
List<Object> tempList = ops.range(key, 0, -1);
if (CollectionUtils.isEmpty(tempList)) {
return null;
}
List<T> resultList = new ArrayList<>();
for (Object serl : tempList) {
resultList.add(claxx.cast(serl));
}
tempList.clear();
return resultList;
}
/**
* @description redis 删除列表中的对象
* @param
* @return void
* @throws
*/
public static void redisDelListValue(final RedisTemplate<String, Object> redisTemplate, final String key,
final Serializable value) {
ListOperations<String, Object> ops = redisTemplate.opsForList();
ops.remove(key, 0, value);
}
/**
* @param <T>
* @description 获取 redis中的对象
* @param
* @return void
* @throws
*/
public static <T> T redisQueryObject(final String key) {
ValueOperations<String, Object> ops = redisTemplate.opsForValue();
return (T) ops.get(key);
}
/**
* @description 删除redis中指定的key
* @param
* @return void
* @throws
*/
public static void redisDeleteKey(final String key) {
redisTemplate.delete(key);
}
/**
* @description 保存对象到redis
* @param key
* @return object
* @throws
*/
public static void redisSaveObject(final String key, final Object object) {
ValueOperations<String, Object> ops = redisTemplate.opsForValue();
ops.getAndSet(key, object);
}
/**
* @description 保存对象到redis
* @param key
* @return object
* @throws
*/
public static void redisSaveObject(final String key, final Object object, int time) {
ValueOperations<String, Object> ops = redisTemplate.opsForValue();
ops.set(key, object, time, TimeUnit.MINUTES);
}
/**
* @description redis保存数据到list
* @param
* @return void
* @throws
*/
public static void redisSaveList(final String key, final Object object, int count) {
ListOperations<String, Object> ops = redisTemplate.opsForList();
ops.leftPush(key, object);
if (0 < count)
ops.trim(key, 0, count);
}
/**
* @param <T>
* @description 获取 redis中的list对象
* @param
* @return
* @throws
*/
public static <T> List<T> redisQueryList(final String key, Class<T> claxx) {
ListOperations<String, Object> ops = redisTemplate.opsForList();
List<Object> tempList = ops.range(key, 0, -1);
if (CollectionUtils.isEmpty(tempList)) {
return null;
}
List<T> resultList = new ArrayList<>();
for (Object serl : tempList) {
resultList.add(claxx.cast(serl));
}
tempList.clear();
return resultList;
}
/**
* @description redis 删除列表中的对象
* @param
* @return void
* @throws
*/
public static void redisDelListValue(final String key, final Serializable value) {
ListOperations<String, Object> ops = redisTemplate.opsForList();
ops.remove(key, 0, value);
}
}
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location">
<description>redis config</description>
<value>classpath:context-datasource.properties</value>
</property>
</bean>
<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
<property name="maxTotal" value="${redis.pool.maxActive}" />
<property name="maxIdle" value="${redis.pool.maxIdle}" />
<property name="maxWaitMillis" value="${redis.pool.maxWait}" />
<property name="testOnBorrow" value="${redis.pool.testOnBorrow}" />
</bean>
<bean id="jedisConnectionFactory"
class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
<property name="usePool" value="true"></property>
<property name="hostName" value="${redis.ip}" />
<property name="port" value="${redis.port}" />
<property name="password" value="${redis.password}" />
<property name="timeout" value="${redis.timeout}" />
<property name="database" value="${redis.default.db}"></property>
<constructor-arg index="0" ref="jedisPoolConfig" />
</bean>
<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
<property name="connectionFactory" ref="jedisConnectionFactory" />
<property name="KeySerializer">
<bean
class="org.springframework.data.redis.serializer.StringRedisSerializer"></bean>
</property>
<property name="ValueSerializer">
<bean
class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer"></bean>
</property>
<property name="HashKeySerializer">
<bean
class="org.springframework.data.redis.serializer.StringRedisSerializer"></bean>
</property>
<property name="HashValueSerializer">
<bean
class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer"></bean>
</property>
</bean>三、系统常量配置 datasource.properties
redis.ip=X.X.X.X
redis.port=6379
redis.password= XXXXX
redis.default.db=0
redis.timeout=30000
redis.pool.maxActive=1024
redis.pool.maxIdle=200
redis.pool.maxWait=1000
redis.pool.testOnBorrow=true四、使用方法，以设置验证码为例子
1、保存验证码 ，到缓存中
String mobile = params.getMobile();
String validCode = RandomUtil.generateString(4);//产生随机四位数验证码
RedisUtil.redisSaveObject(mobile, validCode, 10);//将验证码保存到数据库中10分钟 String validCode = RedisUtil.redisQueryObject(userVo.getMobile());欢迎大家多多提提意见，我也是刚开始学习，望大家多多指教,Q：768665210