SpringBoot整合Redis案例

本是古典何须时尚 2022-03-02 08:44 329阅读 0赞

### 一、引入相关jar ###

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-redis</artifactId>
    </dependency>

### 二、全局配置文件加入Redis服务的位置 ###

#指定redis
    spring.redis.host=192.168.43.118

### 三、编写单元测试测试是否整合成功  ###

其中StringRedisTemplate是组件中专门用来处理字符串的，而RedisTemplate是用来处理对象的

@Autowired
    StringRedisTemplate stringRedisTemplate;//操作字符串
    @Autowired
    RedisTemplate redisTemplate;//key:value 对象
    
    /**
     * redis常用数据类型测试
     * String(字符串)、List(列表)、Set(集合)、Hash(散列)、ZSet(有序集合)
     *  stringRedisTemplate.opsForValue();
     *  stringRedisTemplate.opsForList();
     *  stringRedisTemplate.opsForSet();
     *  stringRedisTemplate.opsForHash();
     *  stringRedisTemplate.opsForZSet();
     */
    //字符类型测试
    @Test
    public void testStringRedis(){
        stringRedisTemplate.opsForValue().append("msg","hello");
        String msg = stringRedisTemplate.opsForValue().get("msg");
        System.out.println("msg:"+msg);
    
        stringRedisTemplate.opsForList().leftPush("mylist","张三");
        stringRedisTemplate.opsForList().leftPush("mylist","李四");
        stringRedisTemplate.opsForList().leftPush("mylist","王五");
    
    }
    //对象类型测试
    @Test
    public void testRedis(){
        Employee emp = employeeMapper.getEmpById(1);
        redisTemplate.opsForValue().set("emp-01",emp);
        redisTemplate.opsForValue().set("emp-02",emp);
           
    }

其中对象测试的实体需要继承Serializable

![20190320090631356.png][]

因为如果没有配置默认是用JDK的序列化方式

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3htMzkzMzkyNjI1_size_16_color_FFFFFF_t_70][]

得到结果：

![20190320090833863.png][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3htMzkzMzkyNjI1_size_16_color_FFFFFF_t_70 1][]

由上图可知emp-01和emp-02默认的序列化方式可读性很差 ,一般是使用Json方式保存：

**方式一：先把对象转成Json在保存，跟以前开发类似，这里不再讲述**

**方式二：重写自己的默认序列化器**

@Configuration
    public class MyRedisConfig {
    
        @Bean
        public RedisTemplate<Object, Employee> empRedisTemplate(
                RedisConnectionFactory redisConnectionFactory)
                throws UnknownHostException {
            RedisTemplate<Object, Employee> template = new RedisTemplate<Object, Employee>();
            template.setConnectionFactory(redisConnectionFactory);
            Jackson2JsonRedisSerializer<Employee> ser = new Jackson2JsonRedisSerializer<Employee>(Employee.class);
            template.setDefaultSerializer(ser);
            return template;
        }

修改单元测试添加自己重写的RedisTemplate

@Autowired
    RedisTemplate<Object, Employee> empRedisTemplate;
    //对象类型测试
    @Test
    public void testRedis(){
        Employee emp = employeeMapper.getEmpById(1);
        empRedisTemplate.opsForValue().set("emp-03",emp);
    }

结果：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3htMzkzMzkyNjI1_size_16_color_FFFFFF_t_70 2][]

[20190320090631356.png]: /images/20220302/70255978f7db4d8bbced71cfc40e0508.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3htMzkzMzkyNjI1_size_16_color_FFFFFF_t_70]: /images/20220302/1ed2d22b82294d2187f818dab033cc90.png
[20190320090833863.png]: /images/20220302/b746165077e84b4b8ed9c28fd7dec516.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3htMzkzMzkyNjI1_size_16_color_FFFFFF_t_70 1]: /images/20220302/28839f080f7546549795b984c78b5bfe.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3htMzkzMzkyNjI1_size_16_color_FFFFFF_t_70 2]: /images/20220302/9a0562e855b14ab6a5073852c0018254.png