Redis的安装过程及与SSM结合使用

Redis安装过程

1. 下载安装包,解压,Mac系统将文件夹放在/usr/local文件夹下

2. 打开终端,先安装服务器端server
   终端$ cd /usr/local/redis/

3. 去文件下进入redis.config文件
   
   找到requirepass删除前面的#
   并修改后面拼接的密码
   保存

4. 进入终端
   输入命令
   终端$ cd src/
   终端$ ./redis-server ../redis.conf
   进入redis的服务器端
   Ctrl + c退出

(如果在过程中提示没有权限就在命令前加sudo)

但在使用的过程中不要退出

1. 再开启一个终端,安装客户端试用
   命令
   终端$ cd /usr/local/redis/src/
   终端$ ./redis-cli -a 密码
   就进入到了redis的客户端

操作redis客户端的命令
*
前面的是ip地址:端口号
keys * 查询所有的key
*
设置key和value
* get name
通过key获取value
* flushdb
清除redis内存中的数据,但不建议经常使用,影响服务器的性能
* del name
也可以通过key删除数据
* exit
退出

redis和SSM结合使用

1.搭建一个SSM的项目,并连接数据库
下面我主要介绍和redis有关的配置
2.创建RedisCache类,这个类是redis的核心

package com.dhl.redis;// redis缓存// jedis redis for Java/** * 序列化的是数据 * 不会序列化类结构 * 但会序列化关系(数据对应的类结构) */public class RedisCache implements Cache {    // 基于Redis的MyBatis二级缓存的实现    // 需要中间类对其进行静态注    private static JedisConnectionFactory jedisConnectionFactory;    private final String id;    private final ReadWriteLock readWriteLock = new ReentrantReadWriteLock();    public static void setJedisConnectionFactory(JedisConnectionFactory jedisConnectionFactory) {        RedisCache.jedisConnectionFactory = jedisConnectionFactory;    }    // 根据标识构造缓存对象    public RedisCache(String id) {        if (id == null){            // 抛出非法参数异常            throw new IllegalArgumentException("缓存id不能为空");        }        this.id = id;    }    /**     * 获取缓存对象的唯一标准     *     * @return     */    public String getId() {        return this.id;    }    /**     * 把key/value保存到缓存对象中     */    public void putObject(Object key, Object value) {        JedisConnection jedisConnection = null;        try {            //操作readis进行保存            jedisConnection = (JedisConnection) jedisConnectionFactory.getConnection();            //创建一个序列化工具            RedisSerializer<Object> serializer = new JdkSerializationRedisSerializer();            // 创建连接,保存key的value            jedisConnection.set(serializer.serialize(key),serializer.serialize(value));        }catch (JedisConnectionException e){            e.printStackTrace();        }finally {            if (jedisConnection != null){                jedisConnection.close();            }        }    }    public Object getObject(Object key) {        // 通过key从缓存对象中获取value        Object result = null;        JedisConnection jedisConnection = null;        try {            // 建立连接            jedisConnection = (JedisConnection) jedisConnectionFactory.getConnection();            RedisSerializer<Object> serializer= new JdkSerializationRedisSerializer();            byte[] bytes = jedisConnection.get(serializer.serialize(key));            // 1. 将key序列化            // 2. 通过connection获取序列化的value            // 3. 将序列化的value反序列化            result = serializer.deserialize(bytes);            /**             * 序列化的是数据             * 不会序列化类结构             * 但会序列化关系(数据对应的类结构)             */        }catch (JedisConnectionException e){            e.printStackTrace();        }finally {            if (jedisConnection != null){                jedisConnection.close();            }        }        return result;    }    /**     * 不是需要实现的方法,没有被核心框架调用     * 方法作用: 根据key移除对应的value     */    public Object removeObject(Object key) {        Object result = null;        JedisConnection jedisConnection = null;        try {            // 建立连接            jedisConnection = (JedisConnection) jedisConnectionFactory.getConnection();            RedisSerializer<Object> serializer= new JdkSerializationRedisSerializer();            // 移除保存到的值            result = jedisConnection.expire(serializer.serialize(key),0);        }catch (JedisConnectionException e){            e.printStackTrace();        }finally {            if (jedisConnection != null){                jedisConnection.close();            }        }        return result;    }    // 清除缓存(操作影响性能,效率低,不建议经常清除)    public void clear() {        JedisConnection jedisConnection = null;        try {            jedisConnection = (JedisConnection) jedisConnectionFactory.getConnection();            // 清除缓存            jedisConnection.flushDb();            // 清除设置            jedisConnection.flushAll();        }catch (JedisConnectionException e){        }finally {            if (jedisConnection != null){                jedisConnection.close();            }        }    }    /**     * 获取缓存对象中存取的key/value的数量     * @return     */    public int getSize() {        Integer count = 0;        JedisConnection jedisConnection = null;        try {            jedisConnection = (JedisConnection) jedisConnectionFactory.getConnection();            count = Integer.valueOf(jedisConnection.dbSize().toString());        }catch (JedisConnectionException e){        }finally {            if (jedisConnection != null){                jedisConnection.close();            }        }        return count;    }    // 获取读写锁    // 从mybatis的3.2.6版本,这个方法不再被框架核心调用    // 所有需要的锁,都必须由缓存供应商来提供    public ReadWriteLock getReadWriteLock() {        return this.readWriteLock;    }}

3.创建中间类

package com.lanou.redis;public class RedisCacheTransfer {    @Autowired    public void setJedisConnectionFactory(JedisConnectionFactory jedisConnectionFactory){        RedisCache.setJedisConnectionFactory(jedisConnectionFactory);    }}

4.redis的配置文件—-(1)redis.properties

# Redis的配置redis.host=127.0.0.1redis.port=6379redis.pass=111111redis.maxIdl=300redis.maxActive=600redis.maxWait=1000

5.redis的配置文件—-(2)SSM-redis.xml
这个配置文件也可以和SSM-mybatis.xml配置文件写在一起

<?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"       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">    <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">        <property name="locations">            <list>                <value>classpath:redis.properties</value>                <value>classpath:db.properties</value>            </list>        </property>    </bean>    <!--构建redis的数据源-->    <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">        <property name="maxIdle" value="${redis.maxIdl}"/>        <property name="maxTotal" value="${redis.maxActive}"/>        <property name="maxWaitMillis" value="${redis.maxWait}"/>    </bean>    <bean id="jedisConnectionFactory"          class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"          p:hostName="${redis.host}" p:port="${redis.port}" p:password="${redis.pass}" p:poolConfig-ref="poolConfig"    />    <bean id="redisCacheTranfer" class="com.lanou.redis.RedisCacheTransfer">        <property name="jedisConnectionFactory" ref="jedisConnectionFactory"/>    </bean></beans>

6.mybatis的配置文件—–mybatis-config.xml

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE configuration        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"        "http://mybatis.org/dtd/mybatis-3-config.dtd"><configuration>    <settings>        <!-- Globally enables or disables any caches configured in any mapper under this configuration -->        <setting name="cacheEnabled" value="true"/>        <!-- Sets the number of seconds the driver will wait for a response from the database -->        <setting name="defaultStatementTimeout" value="3000"/>        <!-- Enables automatic mapping from classic database column names A_COLUMN to camel case classic Java property names aColumn -->        <setting name="mapUnderscoreToCamelCase" value="true"/>        <!-- Allows JDBC support for generated keys. A compatible driver is required.        This setting forces generated keys to be used if set to true,         as some drivers deny compatibility but still work -->        <setting name="useGeneratedKeys" value="true"/>        <!--查询的时候,关闭关联对象即使加载,为了提高性能-->        <setting name="lazyLoadingEnabled" value="false"/>        <!--允许多个结果集,默认就是true-->        <setting name="multipleResultSetsEnabled" value="true"/>        <!--设置关联的对象加载的形态,此处是按需加载字段.不会加载所有的字段,而是有sql来决定-->        <setting name="aggressiveLazyLoading" value="true"/>    </settings>    <!-- Continue going here --></configuration>

7.最后不要忘记在web.xml的配置文件中配置SSM-redis.xml

8.可以写查询语句进行测试,运行成功之后我们可以去进入终端,使用redis的客户端,通过key * 可以查到内存中的数据

Redis安装过程

1. 下载安装包,解压,Mac系统将文件夹放在/usr/local文件夹下

2. 打开终端,先安装服务器端server
   终端$ cd /usr/local/redis/

3. 去文件下进入redis.config文件
   
   找到requirepass删除前面的#
   并修改后面拼接的密码
   保存

4. 进入终端
   输入命令
   终端$ cd src/
   终端$ ./redis-server ../redis.conf
   进入redis的服务器端
   Ctrl + c退出

(如果在过程中提示没有权限就在命令前加sudo)

但在使用的过程中不要退出

1. 再开启一个终端,安装客户端试用
   命令
   终端cd/usr/local/redis/src/终端 ./redis-cli -a 密码
   就进入到了redis的客户端

操作redis客户端的命令
*
前面的是ip地址:端口号
keys * 查询所有的key
*
设置key和value
*
通过key获取value
*
清除redis内存中的数据,但不建议经常使用,影响服务器的性能
*
也可以通过key删除数据
*
退出

redis和SSM结合使用

1.搭建一个SSM的项目,并连接数据库
下面我主要介绍和redis有关的配置
2.创建RedisCache类,这个类是redis的核心

package com.dhl.redis;// redis缓存// jedis redis for Java/** * 序列化的是数据 * 不会序列化类结构 * 但会序列化关系(数据对应的类结构) */public class RedisCache implements Cache {    // 基于Redis的MyBatis二级缓存的实现    // 需要中间类对其进行静态注    private static JedisConnectionFactory jedisConnectionFactory;    private final String id;    private final ReadWriteLock readWriteLock = new ReentrantReadWriteLock();    public static void setJedisConnectionFactory(JedisConnectionFactory jedisConnectionFactory) {        RedisCache.jedisConnectionFactory = jedisConnectionFactory;    }    // 根据标识构造缓存对象    public RedisCache(String id) {        if (id == null){            // 抛出非法参数异常            throw new IllegalArgumentException("缓存id不能为空");        }        this.id = id;    }    /**     * 获取缓存对象的唯一标准     *     * @return     */    public String getId() {        return this.id;    }    /**     * 把key/value保存到缓存对象中     */    public void putObject(Object key, Object value) {        JedisConnection jedisConnection = null;        try {            //操作readis进行保存            jedisConnection = (JedisConnection) jedisConnectionFactory.getConnection();            //创建一个序列化工具            RedisSerializer<Object> serializer = new JdkSerializationRedisSerializer();            // 创建连接,保存key的value            jedisConnection.set(serializer.serialize(key),serializer.serialize(value));        }catch (JedisConnectionException e){            e.printStackTrace();        }finally {            if (jedisConnection != null){                jedisConnection.close();            }        }    }    public Object getObject(Object key) {        // 通过key从缓存对象中获取value        Object result = null;        JedisConnection jedisConnection = null;        try {            // 建立连接            jedisConnection = (JedisConnection) jedisConnectionFactory.getConnection();            RedisSerializer<Object> serializer= new JdkSerializationRedisSerializer();            byte[] bytes = jedisConnection.get(serializer.serialize(key));            // 1. 将key序列化            // 2. 通过connection获取序列化的value            // 3. 将序列化的value反序列化            result = serializer.deserialize(bytes);            /**             * 序列化的是数据             * 不会序列化类结构             * 但会序列化关系(数据对应的类结构)             */        }catch (JedisConnectionException e){            e.printStackTrace();        }finally {            if (jedisConnection != null){                jedisConnection.close();            }        }        return result;    }    /**     * 不是需要实现的方法,没有被核心框架调用     * 方法作用: 根据key移除对应的value     */    public Object removeObject(Object key) {        Object result = null;        JedisConnection jedisConnection = null;        try {            // 建立连接            jedisConnection = (JedisConnection) jedisConnectionFactory.getConnection();            RedisSerializer<Object> serializer= new JdkSerializationRedisSerializer();            // 移除保存到的值            result = jedisConnection.expire(serializer.serialize(key),0);        }catch (JedisConnectionException e){            e.printStackTrace();        }finally {            if (jedisConnection != null){                jedisConnection.close();            }        }        return result;    }    // 清除缓存(操作影响性能,效率低,不建议经常清除)    public void clear() {        JedisConnection jedisConnection = null;        try {            jedisConnection = (JedisConnection) jedisConnectionFactory.getConnection();            // 清除缓存            jedisConnection.flushDb();            // 清除设置            jedisConnection.flushAll();        }catch (JedisConnectionException e){        }finally {            if (jedisConnection != null){                jedisConnection.close();            }        }    }    /**     * 获取缓存对象中存取的key/value的数量     * @return     */    public int getSize() {        Integer count = 0;        JedisConnection jedisConnection = null;        try {            jedisConnection = (JedisConnection) jedisConnectionFactory.getConnection();            count = Integer.valueOf(jedisConnection.dbSize().toString());        }catch (JedisConnectionException e){        }finally {            if (jedisConnection != null){                jedisConnection.close();            }        }        return count;    }    // 获取读写锁    // 从mybatis的3.2.6版本,这个方法不再被框架核心调用    // 所有需要的锁,都必须由缓存供应商来提供    public ReadWriteLock getReadWriteLock() {        return this.readWriteLock;    }}

3.创建中间类

package com.lanou.redis;public class RedisCacheTransfer {    @Autowired    public void setJedisConnectionFactory(JedisConnectionFactory jedisConnectionFactory){        RedisCache.setJedisConnectionFactory(jedisConnectionFactory);    }}

4.redis的配置文件—-(1)redis.properties

# Redis的配置redis.host=127.0.0.1redis.port=6379redis.pass=111111redis.maxIdl=300redis.maxActive=600redis.maxWait=1000

5.redis的配置文件—-(2)SSM-redis.xml
这个配置文件也可以和SSM-mybatis.xml配置文件写在一起

<?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"       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">    <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">        <property name="locations">            <list>                <value>classpath:redis.properties</value>                <value>classpath:db.properties</value>            </list>        </property>    </bean>    <!--构建redis的数据源-->    <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">        <property name="maxIdle" value="${redis.maxIdl}"/>        <property name="maxTotal" value="${redis.maxActive}"/>        <property name="maxWaitMillis" value="${redis.maxWait}"/>    </bean>    <bean id="jedisConnectionFactory"          class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"          p:hostName="${redis.host}" p:port="${redis.port}" p:password="${redis.pass}" p:poolConfig-ref="poolConfig"    />    <bean id="redisCacheTranfer" class="com.lanou.redis.RedisCacheTransfer">        <property name="jedisConnectionFactory" ref="jedisConnectionFactory"/>    </bean></beans>

6.mybatis的配置文件—–mybatis-config.xml

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE configuration        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"        "http://mybatis.org/dtd/mybatis-3-config.dtd"><configuration>    <settings>        <!-- Globally enables or disables any caches configured in any mapper under this configuration -->        <setting name="cacheEnabled" value="true"/>        <!-- Sets the number of seconds the driver will wait for a response from the database -->        <setting name="defaultStatementTimeout" value="3000"/>        <!-- Enables automatic mapping from classic database column names A_COLUMN to camel case classic Java property names aColumn -->        <setting name="mapUnderscoreToCamelCase" value="true"/>        <!-- Allows JDBC support for generated keys. A compatible driver is required.        This setting forces generated keys to be used if set to true,         as some drivers deny compatibility but still work -->        <setting name="useGeneratedKeys" value="true"/>        <!--查询的时候,关闭关联对象即使加载,为了提高性能-->        <setting name="lazyLoadingEnabled" value="false"/>        <!--允许多个结果集,默认就是true-->        <setting name="multipleResultSetsEnabled" value="true"/>        <!--设置关联的对象加载的形态,此处是按需加载字段.不会加载所有的字段,而是有sql来决定-->        <setting name="aggressiveLazyLoading" value="true"/>    </settings>    <!-- Continue going here --></configuration>

7.最后不要忘记在web.xml的配置文件中配置SSM-redis.xml

8.可以写查询语句进行测试,运行成功之后我们可以去进入终端,使用redis的客户端,通过key * 可以查到内存中的数据