redis实现 spring-redis-data初学习

今天看了一些redis的客户端实现、主要分为spring-redis-data 、jredis

今天先记录下spring-redis-data的学习心得；

spring-redis-data 中我目前主要用了它的存、取、清除。

先看配置吧redis-manager-config.properties ：

redis.host=192.168.1.20//redis的服务器地址redis.port=6400//redis的服务端口redis.pass=1234xxxxx//密码redis.default.db=0//链接数据库redis.timeout=100000//客户端超时时间单位是毫秒redis.maxActive=300// 最大连接数redis.maxIdle=100//最大空闲数

redis.maxWait=1000//最大建立连接等待时间redis.testOnBorrow=true//指明是否在从池中取出连接前进行检验,如果检验失败,则从池中去除连接并尝试取出另一个

spring 中配置

<bean id="propertyConfigurerRedis" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"><property name="order" value="1" /><property name="ignoreUnresolvablePlaceholders" value="true" /><property name="locations"><list><value>classpath:config/redis-manager-config.properties</value></list></property></bean><!-- jedis pool配置 --><bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig"><property name="maxActive" value="${redis.maxActive}" /><property name="maxIdle" value="${redis.maxIdle}" /><property name="maxWait" value="${redis.maxWait}" /><property name="testOnBorrow" value="${redis.testOnBorrow}" /></bean><!-- spring data redis --><bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"><property name="usePool" value="true"></property><property name="hostName" value="${redis.host}" /><property name="port" value="${redis.port}" /><property name="password" value="${redis.pass}" /><property name="timeout" value="${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.StringRedisTemplate"><property name="connectionFactory" ref="jedisConnectionFactory" /></bean>

<!--配置一个基础类（之后的业务类继承于该类）、将redisTemplate注入 -->

<bean id="redisBase" abstract="true">  <property name="template" ref="redisTemplate"></property> </bean>

java代码：

public class RedisBase {    private StringRedisTemplate template;    /**     * @return the template     */    public StringRedisTemplate getTemplate() {        return template;    }    /**     * @param template the template to set     */    public void setTemplate(StringRedisTemplate template) {        this.template = template;    }}

继续：

下面就是具体redis的值的写入、读出、清除缓存喽！

第一：写入

public class StudentCountDO {    private Long id;       private String studentId;        private Long commentHeadCount;       private Long docAttitudeScores;       private Long guideServiceScores;        private Long treatEffectCount;       private Long treatEffectScores;    private String gmtModified;    private String gmtCreated;        private Long waitingTimeScores;   }

 

 StringRedisTemplate template = getTemplate();//获得上面注入的template        // save as hash 一般key都要加一个前缀，方便清除所有的这类key        BoundHashOperations<String, String, String> ops = template.boundHashOps("student:"+studentCount.getStudentId());        Map<String, String> data = new HashMap<String, String>();        data.put("studentId", CommentUtils.convertNull(studentCount.getStudentId()));        data.put("commentHeadCount", CommentUtils.convertLongToString(studentCount.getCommentHeadCount()));        data.put("docAttitudeScores", CommentUtils.convertLongToString(studentCount.getDocAttitudeScores()));        data.put("guideServicesScores", CommentUtils.convertLongToString(studentCount.getGuideServiceScores()));        data.put("treatEffectCount", CommentUtils.convertLongToString(studentCount.getTreatEffectCount()));        data.put("treatEffectScores", CommentUtils.convertLongToString(studentCount.getTreatEffectScores()));        data.put("waitingTimeScores", CommentUtils.convertLongToString(studentCount.getWaitingTimeScores()));        try {            ops.putAll(data);        } catch (Exception e) {            logger.error(CommentConstants.WRITE_EXPERT_COMMENT_COUNT_REDIS_ERROR + studentCount.studentCount(), e);        }

第二、 取出

 public StudentCountDO getStudentCommentCountInfo(String studentId) {        final String strkey = "student:"+ studentId;        return getTemplate().execute(new RedisCallback<StudentCountDO>() {            @Override            public StudentCountDO doInRedis(RedisConnection connection) throws DataAccessException {                byte[] bkey = getTemplate().getStringSerializer().serialize(strkey);                if (connection.exists(bkey)) {                    List<byte[]> value = connection.hMGet(bkey,                            getTemplate().getStringSerializer().serialize("studentId"), getTemplate()                                    .getStringSerializer().serialize("commentHeadCount"), getTemplate()                                    .getStringSerializer().serialize("docAttitudeScores"), getTemplate()                                    .getStringSerializer().serialize("guideServicesScores"), getTemplate()                                    .getStringSerializer().serialize("treatEffectCount"), getTemplate()                                    .getStringSerializer().serialize("treatEffectScores"), getTemplate()                                    .getStringSerializer().serialize("waitingTimeScores"));                    StudentCountDO studentCommentCountDO = new StudentCountDO();                    studentCommentCountDO.setExpertId(getTemplate().getStringSerializer().deserialize(value.get(0)));                    studentCommentCountDO.setCommentHeadCount(Long.parseLong(getTemplate().getStringSerializer()                            .deserialize(value.get(1))));                    studentCommentCountDO.setDocAttitudeScores(Long.parseLong(getTemplate().getStringSerializer()                            .deserialize(value.get(2))));                    studentCommentCountDO.setGuideServiceScores(Long.parseLong(getTemplate().getStringSerializer()                            .deserialize(value.get(3))));                    studentCommentCountDO.setTreatEffectCount(Long.parseLong(getTemplate().getStringSerializer()                            .deserialize(value.get(4))));                    studentCommentCountDO.setTreatEffectScores(Long.parseLong(getTemplate().getStringSerializer()                            .deserialize(value.get(5))));                    studentCommentCountDO.setWaitingTimeScores(Long.parseLong(getTemplate().getStringSerializer()                            .deserialize(value.get(6))));                    return studentCommentCountDO;                }                return null;            }        });    }

这个存和取的过程其实是把对象中的各个字段序列化之后存入到hashmap 、取出来的时候在进行按照存入进去的顺序进行取出。

第三 清除

这个就根据前面的前缀很简单了，一句代码就搞定啦！

 private void clear(String pattern) {        StringRedisTemplate template = getTemplate();        Set<String> keys = template.keys(pattern);        if (!keys.isEmpty()) {            template.delete(keys);        }    }

pattern传入为student: 就可以将该类型的所有缓存清除掉喽！