Spring DataJPA Redis 教程(基础版)

qianmoQ

本教程主要详细讲解Spring Data Redis,它向Redis提供Spring Data平台的抽象.

Redis由基于key/value库的数据结构存数，以持久保存数据，并可用作数据库，缓存，消息代理等。

基础环境

—

技术	版本
Java	1.8+
SpringBoot	2.x.x
DataJPA	2.x.x
Jedis	2.9.x

创建项目

—

初始化项目

mvn archetype:generate -DgroupId=com.edurt.sli.slidr -DartifactId=spring-learn-integration-datajpa-redis -DarchetypeArtifactId=maven-archetype-quickstart -Dversion=1.0.0 -DinteractiveMode=false

修改pom.xml增加redis的支持

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <parent>
        <artifactId>spring-learn-integration-datajpa</artifactId>
        <groupId>com.edurt.sli</groupId>
        <version>1.0.0</version>
    </parent>

    <modelVersion>4.0.0</modelVersion>

    <artifactId>spring-learn-integration-datajpa-redis</artifactId>

    <name>Spring DataJPA Redis教程(基础版)</name>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>${dependency.springboot2.common.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
            <version>${dependency.springboot2.common.version}</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${dependency.lombok.version}</version>
        </dependency>
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>${dependency.jedis.version}</version>
        </dependency>
        <dependency>
            <groupId>io.lettuce</groupId>
            <artifactId>lettuce-core</artifactId>
            <version>${dependency.lettuce.version}</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>${dependency.springboot2.common.version}</version>
                <configuration>
                    <fork>true</fork>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>${plugin.maven.compiler.version}</version>
                <configuration>
                    <source>${system.java.version}</source>
                    <target>${system.java.version}</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

spring-boot-starter-data-redis整合Redis需要的依赖包,或者单独使用spring-data-redis和jedis依赖包

一个简单的应用类

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.edurt.sli.slidr;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * <p> SpringBootDataJPARedisIntegration </p>
 * <p> Description : SpringBootDataJPARedisIntegration </p>
 * <p> Author : qianmoQ </p>
 * <p> Version : 1.0 </p>
 * <p> Create Time : 2019-06-14 00:44 </p>
 * <p> Author Email: <a href="mailTo:shichengoooo@163.com">qianmoQ</a> </p>
 */
@SpringBootApplication
public class SpringBootDataJPARedisIntegration {

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

}

配置支持Redis

—

在resources资源目录下创建一个application.properties的配置文件,内容如下

spring.redis.host=localhost
spring.redis.port=6379
spring.redis.database=0
spring.redis.jedis.pool.max-active=8
spring.redis.jedis.pool.max-wait=1ms
spring.redis.lettuce.pool.max-active=8
spring.redis.jedis.pool.min-idle=0

操作Redis数据

—

在/src/main/java/com/edurt/sli/slidr目录下创建model目录,并在该目录下新建RedisModel文件

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.edurt.sli.slidr.model;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;
import org.springframework.data.annotation.Id;
import org.springframework.data.redis.core.RedisHash;

/**
 * <p> RedisModel </p>
 * <p> Description : RedisModel </p>
 * <p> Author : qianmoQ </p>
 * <p> Version : 1.0 </p>
 * <p> Create Time : 2019-06-14 01:06 </p>
 * <p> Author Email: <a href="mailTo:shichengoooo@163.com">qianmoQ</a> </p>
 */
@RedisHash(value = "Redis")
@Data
@ToString
@AllArgsConstructor
@NoArgsConstructor
public class RedisModel {

    @Id
    private String id;
    private String name;

}

@RedisHash为每个数据库创建域类的空子类。

@Id注解的属性和被命名为id的属性会被当作标识属性

在/src/main/java/com/edurt/sli/slidr目录下创建repository目录,并在该目录下新建RedisSupport文件

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.edurt.sli.slidr.repository;

import com.edurt.sli.slidr.model.RedisModel;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;

/**
 * <p> RedisSupport </p>
 * <p> Description : RedisSupport </p>
 * <p> Author : qianmoQ </p>
 * <p> Version : 1.0 </p>
 * <p> Create Time : 2019-06-14 00:59 </p>
 * <p> Author Email: <a href="mailTo:shichengoooo@163.com">qianmoQ</a> </p>
 */
@Repository
public interface RedisSupport extends CrudRepository<RedisModel, String> {
}

在CrudRepository中提供了一些基础的增删改查的功能.

测试增删改查的功能

在/src/main/java/com/edurt/sli/slidr目录下创建controller目录,并在该目录下新建RedisController文件

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.edurt.sli.slidr.controller;

import com.edurt.sli.slidr.model.RedisModel;
import com.edurt.sli.slidr.repository.RedisSupport;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

/**
 * <p> RedisController </p>
 * <p> Description : RedisController </p>
 * <p> Author : qianmoQ </p>
 * <p> Version : 1.0 </p>
 * <p> Create Time : 2019-06-14 01:05 </p>
 * <p> Author Email: <a href="mailTo:shichengoooo@163.com">qianmoQ</a> </p>
 */
@RestController
@RequestMapping(value = "redis")
public class RedisController {

    @Autowired
    private RedisSupport support;

    @GetMapping
    public Object get() {
        return this.support.findAll();
    }

    @PostMapping
    public Object post(@RequestBody RedisModel mode) {
        return this.support.save(mode);
    }

    @PutMapping
    public Object put(@RequestBody RedisModel mode) {
        return this.support.save(mode);
    }

    @DeleteMapping
    public Object delete(@RequestParam String id) {
        this.support.deleteById(id);
        return "SUCCESS";
    }

}

添加数据

shicheng@shichengdeMacBook-Pro ~> curl -X POST http://localhost:8080/redis -H 'Content-Type:application/json' -d '{"id": "1", "name": "Hello Redis"}'
{"id":"1","name":"Hello Redis"}⏎

外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传

修改数据

shicheng@shichengdeMacBook-Pro ~> curl -X PUT http://localhost:8080/redis -H 'Content-Type:application/json' -d '{"id": "1", "name": "Hello Redis Modfiy"}'
{"id":"1","name":"Hello Redis Modfiy"}⏎

外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传

获取数据

shicheng@shichengdeMacBook-Pro ~> curl -X GET http://localhost:8080/redis
[{"id":"1","name":"Hello Redis Modfiy"}]⏎

删除数据

shicheng@shichengdeMacBook-Pro ~> curl -X DELETE 'http://localhost:8080/redis?id=1'
SUCCESS⏎

外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传

打包文件部署

—

打包数据

mvn clean package -Dmaven.test.skip=true -X

运行打包后的文件即可

java -jar spring-learn-integration-datajpa/spring-learn-integration-datajpa-redis/target/spring-learn-integration-datajpa-redis-1.0.0.jar

源码地址

—

GitHub
Gitee

小助手

最近论坛上关于Spring DataJPA Redis教程的讨论很有趣。有一些用户认为该教程是一个很好的入门指南，能够帮助初学者快速上手。他们认为该教程清晰明了，提供了很多实际的示例代码，让人可以很容易地理解和应用Spring DataJPA和Redis。

然而，也有一些用户对该教程提出了一些质疑。他们认为该教程过于基础，缺乏一些深入的内容和案例。这些用户希望在教程中能够更多地了解关于Spring DataJPA和Redis的高级特性和用法。他们希望教程能够提供更多实际项目中常见的应用场景，以及如何处理一些复杂的查询和数据操作。

参与讨论的一位用户还提到了与使用Redis的一些疑问。他提问是否真的有必要使用Redis，以及它与其他数据库的比较优势是什么。他还问到，如果在一个项目中同时使用Spring DataJPA和Redis，是否会导致性能问题或对系统架构造成影响。

总的来说，这些讨论为我们提供了不同的观点和思考。有些人认为该教程对于初学者来说足够好，而其他人则对其进行了进一步的扩展和深入的要求。同时也有一些用户对使用Redis和其与其他数据库的优势和影响性能等问题提出了好奇和疑问。这些讨论使我们更全面地了解了Spring DataJPA Redis教程及其相关话题。