SpringBoot中使用Redis案例詳解

更新時間：2025年10月11日 10:10:50 作者：wangmengxxw

文章主要介紹了在SpringBoot項目中的基本配置和文件結(jié)構(gòu),通過引入案例給大家介紹的非常詳細(xì),感興趣的朋友一起看看吧

1.配置xml文件

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-spring-boot3-starter</artifactId>
            <version>3.5.12</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-3-starter</artifactId>
            <version>1.2.20</version>
        </dependency>
        <!--對象和JSON字符相互轉(zhuǎn)換-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>2.0.32</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
    </dependencies>

2.在resources包下創(chuàng)建application.yml文件，并進(jìn)行配置

spring:
  data:
    redis:
      host: 192.168.11.88//自己Redis的IP地址
      port: 6379
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/test_db1
    username: root
    password: 123456
mybatis-plus:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

3.將App.java改為項目名稱+Application.java(SpringBoot的核心啟動類)

負(fù)責(zé)初始化并啟動整個 Spring Boot 應(yīng)用

package com.jiazhong.mingxing.boot.boot052; // 1. 包聲明
import org.springframework.boot.SpringApplication; // 2. 核心類導(dǎo)入
import org.springframework.boot.autoconfigure.SpringBootApplication; // 3. 核心注解導(dǎo)入
@SpringBootApplication // 4. 核心注解（關(guān)鍵）
public class Boot052Application { // 5. 啟動類（類名通常與項目名對應(yīng)）
    // 6. 程序入口（main方法，JVM啟動時執(zhí)行）
    public static void main(String[] args) {
        // 7. 啟動Spring Boot應(yīng)用的核心方法
        SpringApplication.run(Boot052Application.class, args);
    }
}

4.編寫bean包

（主要用于存放實體類（也稱為 Java Bean），這些類通常用于封裝數(shù)據(jù)，是應(yīng)用中數(shù)據(jù)傳遞和存儲的載體）

package com.jiazhong.mingxing.boot.boot052.bean;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableLogic;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@NoArgsConstructor
public class Student {
    @TableId(value = "id")
    private Long id;
    private String name;
    private String stuNo;
    private String password;
    private Character gender;
    private String birthday;
    private String placeOfOrigin;
    private String createTime;
    private Long schoolId;
    private Long courseId;
    @TableLogic(delval = "1",value = "0")
    private Integer state;
    private String enrollmentDate;
    private String updateTime;
}

5.編寫mapper包

定義數(shù)據(jù)庫操作接口：聲明 CRUD（增刪改查）等數(shù)據(jù)庫操作方法（如selectById、insert、update）。
映射 SQL 語句：通過 XML 文件或注解方式，將接口方法與具體的 SQL 語句關(guān)聯(lián)。
隔離數(shù)據(jù)訪問邏輯：使 Service 層無需關(guān)注數(shù)據(jù)庫操作細(xì)節(jié)，只需調(diào)用 Mapper 接口方法即可。

package com.jiazhong.mingxing.boot.boot052.mapper;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.jiazhong.mingxing.boot.boot052.bean.Student;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface StudentMapper extends BaseMapper<Student> {
}

6.編寫service包下的service類

service包（通常命名為com.xxx.service）是業(yè)務(wù)邏輯層的核心，負(fù)責(zé)實現(xiàn)應(yīng)用的核心業(yè)務(wù)邏輯，協(xié)調(diào)數(shù)據(jù)訪問層（Mapper）和控制層（Controller）之間的交互，是整個應(yīng)用的 “業(yè)務(wù)處理中心”。

package com.jiazhong.mingxing.boot.boot052.service;
import com.baomidou.mybatisplus.extension.service.IService;
import com.jiazhong.mingxing.boot.boot052.bean.Student;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public interface StudentService extends IService<Student> {
    Student findStudentById(String id);
    //Redis存儲String類型的內(nèi)容
    List<Student> findAll1();
   //Redis存儲List類型的內(nèi)容
    List<Student> findAll2();
    List<Student> findAll3();
    //添加學(xué)生信息
    int saveStudent(Student student);
    //修改學(xué)生信息
    int updateStudent(Student student);
    //刪除學(xué)生信息
    int removeStudent(String id);
}

7.編寫service報下的實現(xiàn)類

package com.jiazhong.mingxing.boot.boot052.service.impl;
import com.alibaba.fastjson.JSONArray;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.jiazhong.mingxing.boot.boot052.bean.Student;
import com.jiazhong.mingxing.boot.boot052.mapper.StudentMapper;
import com.jiazhong.mingxing.boot.boot052.service.StudentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.ListOperations;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Service;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
@Slf4j
@Service
public class StudentServiceImpl extends ServiceImpl<StudentMapper, Student> implements StudentService {
   /* @Resource
    private StringRedisTemplate stringRedisTemplate;
    @Resource
    private StudentMapper studentMapper;*/
    private StringRedisTemplate stringRedisTemplate;
    private StudentMapper studentMapper;
    private ValueOperations<String,String> forValue;
    private ListOperations<String, String> forList;
    public static final String PREFIX_STUDENT="PREFIX_STUDENT";
    public static final String ALL_STUDENT="ALL_STUDENT";
    @Autowired//構(gòu)造器
    public StudentServiceImpl(StringRedisTemplate stringRedisTemplate, StudentMapper studentMapper) {
        this.stringRedisTemplate = stringRedisTemplate;
        this.studentMapper = studentMapper;
        this.forValue=stringRedisTemplate.opsForValue();
        this.forList=stringRedisTemplate.opsForList();
    }
    @Override
    public Student findStudentById(String id) {
        log.info("開始查詢id:{}的數(shù)據(jù)",id);
        //1.從Redis中獲取到指定id的數(shù)據(jù)
        String studentJSON = forValue.get(PREFIX_STUDENT + id);
        log.info("返回id:{}的數(shù)據(jù):{}",id,studentJSON);
        //2.如果存在，返回該數(shù)據(jù)
        if (studentJSON!=null){
            log.info("存在該數(shù)據(jù)，結(jié)束！");
            return JSONArray.parseObject(studentJSON, Student.class);
        }
        //3.如果不存在該數(shù)據(jù)，從數(shù)據(jù)庫中獲取
        Student student = studentMapper.selectById(id);
        log.info("不存在該數(shù)據(jù)，從數(shù)據(jù)庫中獲取到數(shù)據(jù):{}",student);
        //4.存放到Redis中
        String jsonString = JSONArray.toJSONString(student);
        forValue.set(PREFIX_STUDENT+id,jsonString,1, TimeUnit.HOURS);
        log.info("存放數(shù)據(jù)到Redis中");
        //5.返回數(shù)據(jù)
        return student;
    }
    @Override
    public List<Student> findAll1() {
        //1.從Redis中獲取
        String json = forValue.get(ALL_STUDENT);
        //2.如果存在，返回數(shù)據(jù)，結(jié)束
        if (json!=null){
            return JSONArray.parseArray(json, Student.class);
        }
        //3.如果不存在，連接數(shù)據(jù)庫
        List<Student> all_student = this.list();
        //4.將數(shù)據(jù)存放到Redis中
        String jsonString = JSONArray.toJSONString(all_student);
        forValue.set(ALL_STUDENT,jsonString,1, TimeUnit.HOURS);
        //5.返回數(shù)據(jù)
        return all_student;
    }
    @Override
    public List<Student> findAll2() {
        //1.從Redis中獲取
        List<String> stringList = forList.range(ALL_STUDENT, 0, -1);
        //2.如果存在，返回數(shù)據(jù)，結(jié)束
        if (stringList!=null && !stringList.isEmpty()){
            List<Student> all_student=new ArrayList<>();//產(chǎn)生空集合
            stringList.forEach(s -> {
                Student student=JSONArray.parseObject(s,Student.class);
                all_student.add(student);
            });
            return all_student;
        }
        //3.如果不存在，連接數(shù)據(jù)庫
        List<Student> list = this.list();
        //4.將數(shù)據(jù)存放到Redis中(一個一個的轉(zhuǎn)成JSON字符串，然后放到列表中)
        list.forEach(student -> {
            String s = JSONArray.toJSONString(student);
            forList.rightPush(ALL_STUDENT,s);
        });
        //5.返回數(shù)據(jù)
        return list;
    }
    @Override
    public List<Student> findAll3() {
        //1.從Redis中獲取數(shù)據(jù)
        List<String> stringList = forList.range(ALL_STUDENT, 0, -1);
        //2.如果存在返回數(shù)據(jù)結(jié)果
        if (stringList!=null && !stringList.isEmpty()){
            List<Student> all_students = new ArrayList<>();
            stringList.forEach(id -> {
                String json = forValue.get(id);
                Student student = JSONArray.parseObject(json, Student.class);
                all_students.add(student);
            });
            return all_students;
        }
        //3.如果數(shù)據(jù)不存在，連接數(shù)據(jù)庫
        List<Student> list=this.list();
        //4.將對象存放到Redis中
        list.forEach(student -> {
            //4.1將id存放到集合中
            forList.rightPush(ALL_STUDENT,student.getId()+"");
            //4.2將對象存放到了String中
            forValue.set(student.getId()+"",JSONArray.toJSONString(student));
        });
        //5.返回數(shù)據(jù)
        return list;
    }
    @Override
    public int saveStudent(Student student) {
        //1.將數(shù)據(jù)添加到數(shù)據(jù)庫中
        boolean b = this.save(student);
        //2.將剛才錄入到數(shù)據(jù)庫的數(shù)據(jù)查詢出來
        QueryWrapper<Student> queryWrapper=new QueryWrapper<>();
        queryWrapper.eq("name",student.getName());
        queryWrapper.eq("stu_no",student.getStuNo());
        Student one=getOne(queryWrapper);
        //3.將數(shù)據(jù)添加到緩存中
        //3.1 將one存放到String中
        forValue.set(one.getId()+"",JSONArray.toJSONString(one));
        //3.2 將id存放到索引區(qū)list
        forList.rightPush(ALL_STUDENT,one.getId()+"");
        return b?1:0;
    }
    /*@Override
    public int saveStudent(Student student) {
        //1.將數(shù)據(jù)添加到數(shù)據(jù)庫中
        boolean b = this.save(student);
        //2.將剛才錄入到數(shù)據(jù)庫的數(shù)據(jù)查詢出來
        QueryWrapper<Student> queryWrapper=new QueryWrapper<>();
        queryWrapper.eq("name",student.getName());
        queryWrapper.eq("stu_no",student.getStuNo());
        Student one=getOne(queryWrapper);
        //3.將數(shù)據(jù)添加到緩存中
        String s = JSONArray.toJSONString(one);
        forList.rightPush(ALL_STUDENT,s);
        return b?1:0;
    }*/
    @Override
    public int updateStudent(Student student) {
        //1.修改數(shù)據(jù)庫數(shù)據(jù)
        boolean b = updateById(student);
        //2.取出剛修改的數(shù)據(jù)
        QueryWrapper<Student> queryWrapper=new QueryWrapper<>();
        queryWrapper.eq("id",student.getId());
        Student sqlStudent=getOne(queryWrapper);
        //3.修改Redis緩存中的數(shù)據(jù)
        forValue.setIfPresent(sqlStudent.getId()+"",JSONArray.toJSONString(sqlStudent));
        return 0;
    }
    @Override
    public int removeStudent(String id) {
        //1.刪除數(shù)據(jù)庫中的數(shù)據(jù)
        boolean b = removeById(id);
        //2.刪除Redis緩存中的數(shù)據(jù)
        forList.remove(ALL_STUDENT,1,id+"");
        stringRedisTemplate.delete(id+"");
        //3.返回結(jié)果
        return b?1:0;
    }
    /*@Override
    public int updateStudent(Student student) {
        //1.修改數(shù)據(jù)庫中的數(shù)據(jù)
        boolean update = updateById(student);
        //2.取出剛修改的數(shù)據(jù)
        QueryWrapper<Student> queryWrapper=new QueryWrapper<>();
        queryWrapper.eq("id",student.getId());
        Student sqlStudent=getOne(queryWrapper);
        //3.修改Redis緩存中的數(shù)據(jù)
        List<String> stringList = forList.range(ALL_STUDENT, 0, -1);
        if (stringList!=null && !stringList.isEmpty()){
            final int[] index={0};
            stringList.forEach(s->{
                Student one=JSONArray.parseObject(s,Student.class);
                if (one.getId().equals(student.getId())){
                    forList.set(ALL_STUDENT,index[0],JSONArray.toJSONString(sqlStudent));
                    index[0]++;
                }
            });
        }
        return update?1:0;
    }*/
}

8.測試

package com.jiazhong.mingxing.boot.boot052.test;
import com.jiazhong.mingxing.boot.boot052.bean.Student;
import com.jiazhong.mingxing.boot.boot052.service.StudentService;
import jakarta.annotation.Resource;
import lombok.extern.slf4j.Slf4j;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import java.util.List;
@SpringBootTest
@Slf4j
public class App {
    @Resource
    private StudentService studentService;
    @Test
    //根據(jù)id查詢學(xué)生信息
    public void a(){
        Student studentById = studentService.findStudentById("1966797153254133762");
        log.info("studentById:{}",studentById);
    }
    @Test
    //查詢所有學(xué)生信息
    public void b1(){
        List<Student> allstudent = studentService.findAll1();
        log.info("allstudent:{}",allstudent);
    }
    @Test
    //查詢所有學(xué)生信息(存儲List類型的內(nèi)容)
    public void b2(){
        List<Student> allstudent = studentService.findAll2();
        allstudent.forEach(e->{
            log.info("e:{}",e);
        });
    }
    @Test
    public void b3(){
        List<Student> allstudent = studentService.findAll3();
        allstudent.forEach(e->{
            log.info("e:{}",e);
        });
    }
    @Test
    //添加學(xué)生信息
    public void c(){
        Student student = new Student();
        student.setName("許錦陽");
        student.setPlaceOfOrigin("陜西咸陽");
        student.setCourseId(1965250158253547036L);
        student.setSchoolId(1965321181514842113L);
        student.setBirthday("2004-9-19");
        student.setStuNo("JK202502287783");
        student.setGender('男');
        int i = studentService.saveStudent(student);
        log.info("i:{}",i);
    }
    @Test
    //修改學(xué)生信息
    public void d(){
        Student student = new Student();
        student.setId(1966797153254133762L);
        student.setBirthday("2005-3-16");
        studentService.updateStudent(student);
    }
    @Test
    //刪除學(xué)生信息
    public void e(){
        int i = studentService.removeStudent("1967044502643716098");
        log.info("i:{}",i);
    }
}

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