1,安装redis

在centos系统上使用yum install redis

显示以上信息即安装完成

这个时候我们是可以启动redis的，但是其他的服务器是无法访问redis的，目前比较新版本的redis默认都会打开保护模式并且绑定本机ip地址，所以这个时候我们需要修改redis.conf配置文件，将保护模式去除添加自己需要绑定的服务器或者直接全部去除。

不知道redis.conf文件在哪里的可以命令：find / -name redis.conf

将protected-mode yes改为no

完成后我们就可以启动redis了，使用命令:service redis start

显示OK表明已经启动成功了

以上就是我们的准备工作，接下来就是具体的代码实现对redis的访问了

2，引入springboot帮我们自动配置redis的jar包

3，添加redis配置文件

@Configuration
public class RedisConfig {
    
    //配置redis模板
    public RedisTemplate<Object,Object> redisTemplate(RedisConnectionFactory redisConnectionFactory){
        RedisTemplate<Object,Object> redisTemplate = new RedisTemplate<>();
        //采用jackson2JsonRedisSerializer包进行序列化
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.setVisibility(PropertyAccessor.ALL,JsonAutoDetect.Visibility.ANY);
        objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(objectMapper);
        redisTemplate.setDefaultSerializer(jackson2JsonRedisSerializer);
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        return redisTemplate;
    }
}

配置文件如下:

server.port=80
spring.redis.database=1
spring.redis.host=172.16.1.165
spring.redis.port=6379
spring.redis.jedis.pool.max-idle=8
spring.redis.jedis.pool.min-idle=0
spring.redis.lettuce.pool.max-active=8

这里需要注意的是我们采用的是Jackson2JsonRedisSerializer来序列化我们的javabean，实际上spring自动化帮我们默认配置了一个JdkSerializationRedisSerializer，这两个是有区别的，Jackson2JsonRedisSerializer相比于JdkSerializationRedisSerializer结构更加清晰，存储的字节少，速度快，并且不需要使用Serializable实例化实体类。

4，配置service类和我们需要测试的实体类

public class Student implements Serializable {
    private String name;
    private String sex;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }
}

public class User implements Serializable {
    private String username;
    private String password;

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getUsername() {
        return username;

    }

    public void setUsername(String username) {
        this.username = username;
    }

}

@Service
public class RedisService {

    @Autowired
    private RedisTemplate<Object,Object> redisTemplate;

    @Autowired
    private StringRedisTemplate stringRedisTemplate;


    @Resource(name = "redisTemplate")
    ValueOperations<Object,Object> valueOperations;

    @Resource(name = "stringRedisTemplate")
    ValueOperations<String,String> valueStringOperations;

    private HashSet<Student> students = new HashSet<Student>();
    private HashSet<User> users = new HashSet<User>();

    public void addStudent(Student student){
        valueOperations.set(student.getName(),student);
    }

    public Object  getStudent(String name){
        Object reslut = valueOperations.get(name);
        return reslut;
    }

    public void addUser(User user){
        valueStringOperations.set(user.getUsername(),user.getPassword());
    }

    public Object  getUser(String username){
        String reslut = valueStringOperations.get(username);
        return reslut;
    }

}

5，配置controller类

@RestController
public class TestController {
    
    @Autowired
    private RedisService redisService;
    
    @RequestMapping("/putstudent")
    public String putStudent(Student student){
        redisService.addStudent(student);
        return "放入Student成功！！！";
    }
    
    @RequestMapping("/getstudentvalue")
    public Student getStudentValue(String name){
        Object result = redisService.getStudent(name);
        return (Student)result;
    }
    
    @RequestMapping("/putUser")
    public String putUser(User user){
        redisService.addUser(user);
        return "放入User成功！！！";
    }
    
    @RequestMapping("/getuservalue")
    public Student getUserValue(String username){
        Object result = redisService.getStudent(username);
        return (Student)result;
    }
}

我们输入http://localhost/putstudent?name=小明&&sex=男 然后再输入http://localhost/putstudent?name=小明

结果如下

我们输入http://localhost/putUser?username=Elvis&&password=123456 然后再输入http://localhost/putstudent?name=小明

结果如下