7.springboot+mybatis+redis整合

选择生成的依赖

选择保存的工程路径

查询已经生成的依赖，并修改mysql的版本

 <dependencies>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-data-redis</artifactId>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-jdbc</artifactId>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
         <dependency>
             <groupId>org.mybatis.spring.boot</groupId>
             <artifactId>mybatis-spring-boot-starter</artifactId>
             <version>2.1.0</version>
         </dependency>
         <!--修改mysql的驱动版本-->
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
             <version>5.1.38</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
     </dependencies>

pom.xml

项目结构如下：

编辑属性文件application.properties

 server.port=8080

 #spring.application.name=springboot-redis

 spring.datasource.driver-class-name=com.mysql.jdbc.Driver
 spring.datasource.url=jdbc:mysql://localhost:3306/kgc
 spring.datasource.username=root
 spring.datasource.password=ok

 #redis
 #redis的服务所在的ip地址
 spring.redis.host=192.168.117.143
 #redis的端口号
 spring.redis.port=6379
 #  redis数据库索引（默认为0) 密码默认是没有的，可以不写
 spring.redis.database=0

 #打印sql语句，改为自己的mapper包路径
 logging.level.cn.kgc.mapper=debug

application.properties

创建持久化类Student.java

 package cn.kgc.vo;

 import java.io.Serializable;

 /**
  * Created by Administrator on 2019/7/22.
  */
 public class Student implements Serializable{
     private Integer sid;
     private String sname;
     private String password;
     private String subject;
     private String result;
     private Integer cid;

     public Student() {
     }

     public Student(Integer sid, String sname, String password, String subject, String result, Integer cid) {
         this.sid = sid;
         this.sname = sname;
         this.password = password;
         this.subject = subject;
         this.result = result;
         this.cid = cid;
     }

     public Integer getSid() {
         return sid;
     }

     public void setSid(Integer sid) {
         this.sid = sid;
     }

     public String getSname() {
         return sname;
     }

     public void setSname(String sname) {
         this.sname = sname;
     }

     public String getPassword() {
         return password;
     }

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

     public String getSubject() {
         return subject;
     }

     public void setSubject(String subject) {
         this.subject = subject;
     }

     public String getResult() {
         return result;
     }

     public void setResult(String result) {
         this.result = result;
     }

     public Integer getCid() {
         return cid;
     }

     public void setCid(Integer cid) {
         this.cid = cid;
     }

     @Override
     public String toString() {
         return "Student{" +
                 "sid=" + sid +
                 ", sname='" + sname + '\'' +
                 ", password='" + password + '\'' +
                 ", subject='" + subject + '\'' +
                 ", result='" + result + '\'' +
                 ", cid=" + cid +
                 '}';
     }
 }

Student.java

创建数据访问层接口StudentMapper.java

 package cn.kgc.mapper;

 import cn.kgc.vo.Student;
 import org.apache.ibatis.annotations.Delete;
 import org.apache.ibatis.annotations.Insert;
 import org.apache.ibatis.annotations.Select;
 import org.apache.ibatis.annotations.Update;

 import java.util.List;

 /**
  * Created by Administrator on 2019/7/22.
  */
 public interface StudentMapper {
     @Select("select * from student")
     List<Student> findAll();

     @Select("select * from student where sid=#{sid}")
     Student findBySid(Integer sid);

     @Delete("delete from student where sid=#{sid}")
     int del(Integer sid);

     @Update("update student set sname=#{sname},password=#{password},subject=#{subject},result=#{result},cid=#{cid} where sid=#{sid}")
     int modify(Student student);

     @Insert("insert into student(sname,password,subject,result,cid) values(#{sname},#{password},#{subject},#{result},#{cid})")
     int add(Student student);

 }

StudentMapper.java

创建业务层接口StudentService.java

 package cn.kgc.service;

 import cn.kgc.vo.Student;

 import java.util.List;

 /**
  * Created by Administrator on 2019/7/22.
  */
 public interface StudentService {
     List<Student> findAll();

     Student findBySid(Integer sid);

     int del(Integer sid);

     int modify(Student student);

     int add(Student student);
 }

StudentService.java

创建业务层接口实现类StudentServiceImpl.java

 package cn.kgc.service;

 import cn.kgc.mapper.StudentMapper;
 import cn.kgc.vo.Student;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.redis.core.ListOperations;
 import org.springframework.data.redis.core.RedisTemplate;
 import org.springframework.data.redis.core.ValueOperations;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;

 import java.util.List;

 @Service
 @Transactional
 public class StudentServiceImpl implements StudentService{
     @Autowired
     StudentMapper studentMapper;

     @Autowired
     RedisTemplate redisTemplate;

     @Override
     public List<Student> findAll() {
         String key="student";
         ListOperations<String,Student> operations= redisTemplate.opsForList();

         //缓存存在
         if (redisTemplate.hasKey(key)){
             return operations.range(key,0,-1);
         }else{
             //得到学生集合
             List<Student> list=studentMapper.findAll();
             operations.leftPushAll(key,list);
             return list;
         }
     }

     @Override
     public Student findBySid(Integer sid) {
         String key = "student_" + sid;
         ValueOperations<String, Student> operations = redisTemplate.opsForValue();

         //缓存存在
         if (redisTemplate.hasKey(key)) {
             System.out.println("redis-siddata");
             return operations.get(key);
         } else {
             //得到学生对象
             Student student = studentMapper.findBySid(sid);
             //添加到缓存
             operations.set(key, student);
             System.out.println("student-siddata");
             return student;
         }
     }

     @Override
     public int del(Integer sid) {
         //删除数据库中的数据
         int count = studentMapper.del(sid);

         //缓存存在
         String key = "student_" + sid;
         if (redisTemplate.hasKey(key)) {
             //删除对应缓存
             redisTemplate.delete(key);
         }
         return count;
     }

     @Override
     public int modify(Student student) {
         //修改数据库中的数据
         int count = studentMapper.modify(student);

         ValueOperations operations = redisTemplate.opsForValue();
         //缓存存在
         String key = "student_" + student.getSid();
         if (redisTemplate.hasKey(key)) {
             //更新缓存
             Student stu = studentMapper.findBySid(student.getSid());
             operations.set(key, stu);
         }
         return count;
     }

     @Override
     public int add(Student student) {
         //添加数据
         int count = studentMapper.add(student);
         return count;
     }
 }

StudentServiceImpl.java

创建控制层StudentController.java

 package cn.kgc.controller;

 import cn.kgc.service.StudentService;
 import cn.kgc.vo.Student;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;

 import java.util.List;

 @RestController
 public class StudentController {

     @Autowired
     StudentService studentService;

     @GetMapping("/student")
     public List<Student> findAll() {
         return studentService.findAll();
     }

   /*  @GetMapping("/student/{sid}")
     public Student findById(@PathVariable("sid") Integer sid) {
         return studentService.findBySid(sid);
     }
 */
   @GetMapping("/findById")
   public Student findById(Integer sid) {
       return studentService.findBySid(sid);
   }

     @PostMapping("/student/{sid}")
     public int del(@PathVariable("sid") Integer sid) {
         return studentService.del(sid);
     }

     @PutMapping("/student")
     public int modify(Student student) {
         return studentService.modify(student);
     }

 }

StudentController.java

启动类

 package cn.kgc;

 import org.mybatis.spring.annotation.MapperScan;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 //指定要扫描的mapper包
 @MapperScan("cn.kgc.mapper")
 @SpringBootApplication
 public class SpringbootMybatisRedisApplication {

     public static void main(String[] args) {
         SpringApplication.run(SpringbootMybatisRedisApplication.class, args);
     }

 }

启动类

测试如下：

第一次访问

查看redis

第二次访问