依赖

<!--SpringCache起步依赖-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-cache</artifactId>
    <version>2.7.3</version>
</dependency>

<!--Redis起步依赖-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

常用注解

注解	作用
@EnableCaching	开启缓存注解功能，加在启动类上
@Cacheable	查询并返回缓存数据，没有则会生成缓存数据
@CachePut	生成缓存数据
@CacheEvict	删除缓存数据

yml配置文件

spring:
  redis:
    host: localhost
    port: 6379
    password: 123456
    database: 2

Student

import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.experimental.Accessors;

import java.io.Serial;
import java.io.Serializable;
import java.time.LocalDateTime;

/**
 * <p>
 * 学生表
 * </p>
 *
 * @author 翰戈.summer
 * @since 2023-12-02
 */
@Data
@EqualsAndHashCode(callSuper = false)
@Accessors(chain = true)
@TableName("tb_student")
public class Student implements Serializable {

    @Serial
    private static final long serialVersionUID = 1L;

    /**
     * 主键id
     */
    @TableId(value = "id", type = IdType.AUTO)
    private Long id;

    /**
     * 姓名
     */
    private String name;

    /**
     * 性别;1代表男，2代表女
     */
    private Integer gender;

    /**
     * 年龄
     */
    private Integer age;

    /**
     * 乐观锁
     */
    private Integer version;

    /**
     * 创建时间
     */
    private LocalDateTime createTime;

    /**
     * 更新时间
     */
    private LocalDateTime updateTime;

}

StudentController

import com.demo.pojo.entity.Student;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * <p>
 * 学生表 前端控制器
 * </p>
 *
 * @author 翰戈.summer
 * @since 2023-12-02
 */
@RestController
@RequestMapping("/students")
public class StudentController {

    @Cacheable(cacheNames = "studentCache", key = "#id")
    @GetMapping("/{id}")
    public Student getStudentById(@PathVariable Long id) {
        //第一次测试，缓存数据。
        String note = "第二次在这里打一个断点进行测试，发现没有进入断点，依然返回了数据。";

        return new Student().setId(id);
    }

}

查看结果

启动异常

如果出现以下异常，使用@SpringBootApplication注解的属性exclude = DataSourceAutoConfiguration.class，忽略数据源的配置。

Description:

Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

Reason: Failed to determine a suitable driver class