微服务-Springboot+Redis缓存管理接口代码实现

废话少说，上代码，结合代码讲解：

一、创建maven工程：导入依赖：

<packaging>war</packaging>
<!--修改jdk的版本-->
<properties>
    <java.version>1.8</java.version>
</properties>

<!-- Add typical dependencies for a web application -->
<dependencies>
    <!--Eureka客户端-->
    <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-netflix-eureka-client -->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        <version>2.1.1.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <!--进行热部署：开启开发者模式-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <optional>true</optional>
    </dependency>
    <!--jstl标签-->
    <dependency>
        <groupId>jstl</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>
    <!--配置访问jsp的依赖，这里用不到-->
    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-jasper</artifactId>
        <scope>provided</scope>
    </dependency>

    <!--mybatis-，这里用不到->
    <!-- https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring-boot-starter -->
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>1.3.2</version>
    </dependency>

    <!-- mybatis分页组件 ，这里用不到-->
    <!-- https://mvnrepository.com/artifact/com.github.pagehelper/pagehelper-spring-boot-starter -->
    <dependency>
        <groupId>com.github.pagehelper</groupId>
        <artifactId>pagehelper-spring-boot-starter</artifactId>
        <version>1.0.0</version>
    </dependency>

    <!--<dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-feign</artifactId>
    </dependency>-->
    
    <!--远程调用，这里用不到， https://mvnrepository.com/artifact/io.github.openfeign/feign-core -->
    <dependency>
        <groupId>io.github.openfeign</groupId>
        <artifactId>feign-core</artifactId>
        <version>10.4.0</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-undertow</artifactId>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>io.swagger</groupId>
        <artifactId>swagger-annotations</artifactId>
        <version>1.5.20</version>
        <scope>compile</scope>
    </dependency>
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.2.62</version>
    </dependency>
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-lang3</artifactId>
    </dependency>

    <dependency>
        <groupId>com.joyoung.cloud</groupId>
        <artifactId>cloud-common</artifactId>
        <version>2.0-SNAPSHOT</version>
        <scope>compile</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.data</groupId>
        <artifactId>spring-data-redis</artifactId>
        <version>2.1.4.RELEASE</version>
    </dependency>

</dependencies>

<!-- Package as an executable jar -->
<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <!--热部署配置-->
                <!--fork :  如果没有该项配置，肯定devtools不会起作用，即应用不会restart -->
                <fork>true</fork>
            </configuration>
        </plugin>

    </plugins>
</build>

二、配置文件：这里配置文件设置一个也可以，合并后将Redis的配置放在application.yml文件中

application.yml:

#配置后台admin的端口号
server:
  port: 8999
#给后台admin模块设置名字
spring:
  application:
    name: hbuy-admin
#配置访问页面路径的前后缀
  mvc:
    view:
      prefix: /WEB-INF/jsp/
      suffix: .jsp
#将后台模块注册到注册中心
eureka:
  client:
    service-url:
      defaultZone: http://127.0.0.1:10010/eureka
#日志的配置
logging:
  level:
   org:
     springframework: error
   com:
     java:
       admin:
         mapper: DEBUG

application.properties:

#设置服务器端口号
server.port=8081
#设置数据库连接四大参数
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost/jycloud?useUnicode=true&characterEncoding=UTF8&zeroDateTimeBehavior=convertToNull
spring.datasource.username=root
spring.datasource.password=123456
#配置页面跳转
spring.application.name=hbuy-admin
spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp
#配置注册中心，将此模块注册到注册中心，这里用不到
eureka.client.service-url.defaultZone=http://127.0.0.1:10010/eureka

#分页插件
pagehelper.helper-dialect=mysql
pagehelper.params=count=countSql
pagehelper.reasonable=true
pagehelper.support-methods-arguments=true

mybatis.mapper-locations=classpath:mapper/*.xml

spring.redis.host=localhost
spring.redis.port=6379
#spring.redis.password=root #根据需要
# Redis数据库索引（默认为0）
spring.redis.database=0
# 连接池最大连接数（使用负值表示没有限制）
spring.redis.pool.max-active=8
# 连接池最大阻塞等待时间（使用负值表示没有限制）
spring.redis.pool.max-wait=-1
# 连接池中的最大空闲连接
spring.redis.pool.max-idle=8
# 连接池中的最小空闲连接
spring.redis.pool.min-idle=0
# 连接超时时间（毫秒）
spring.redis.timeout=0

三、启动类：

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

/**
 * admin模块的启动类

@EnableEurekaClient
@MapperScan(basePackages = "com.java.admin.mapper")这里如果不使用注册中心，注册中心的注解和依赖、配置都可以去掉
 */

@SpringBootApplication(scanBasePackages = "com.java.admin")
@EnableEurekaClient
@MapperScan(basePackages = "com.java.admin.mapper")
public class AdminStart {
    public static void main(String[] args) {
        SpringApplication.run(AdminStart.class);
    }
}

四、创建实体类-缓存类，SysCach

import lombok.Data;
import lombok.experimental.Accessors;
import java.io.Serializable;
/**
 * @ClassName: SysCach
 * @Description:
 * @Version: v1.0.0
 * @Author: Fu Hao
 * @Date: 2019/12/11 0011 下午 8:21
 * Modification History:
 * Date           Author      Version     Description
 * -------------------------------------------------------------
 * 2019/12/11 0011        Fu       v1.0.0         创建
 */
@Data
@Accessors(chain = true)
public class SysCach implements Serializable {
    /*相当于java类的身份证。主要用于版本控制。
      serialVersionUID作用是序列化时保持版本的兼容性，即在版本升级时反序列化仍保持对象的唯一性。
      有两种生成方式：
      一个是默认的1L，比如：private static final long serialVersionUID = 1L;
      一个是根据类名、接口名、成员方法及属性等来生成一个64位的哈希字段，比如：
      private static final long serialVersionUID = xxxxL; */
    private static final long serialVersionUID = -1119517352037523860L;

    /**缓存对用的key**/
    private String key;
    /**缓存对用的value**/
    private String value;
    /**缓存的过期时间**/
    private Long outOfTime;
}

五、统一返回数据格式：RestRes

import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.PageInfo;


/**
 * @ClassName: RestRes
 * @Description:  响应格式化数据
 * @Version: v1.0.0
 * @Author: Fu Hao
 * @Date: 2019/12/11 0011 下午 7:55
 * Modification History:
 * Date           Author      Version     Description
 * -------------------------------------------------------------
 * 2019/12/11 0011        Fu      v1.0.0         创建
 */
public class RestRes {

    public static JSONObject table(PageInfo pageInfo) {
        JSONObject jsonObject = new JSONObject();
        jsonObject.clear();
        jsonObject.put("content", pageInfo.getList());
        jsonObject.put("totalElements", pageInfo.getTotal());
        return jsonObject;
    }

}

六、Controller层 :CacheController 

import com.github.pagehelper.PageInfo;
import com.java.admin.constants.RestRes;
import com.java.admin.service.CacheService;
import com.joyoung.cloud.security.common.entity.admin.SysCach;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.apache.ibatis.annotations.Delete;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.web.bind.annotation.*;

/**
 * @ClassName: CacheController
 * @Description:  缓存管理接口
 * @Version: v1.0.0
 * @Author: Fu Hao
 * @Date: 2019/12/11 0011 下午 7:43
 * Modification History:
 * Date           Author      Version     Description
 * -------------------------------------------------------------
 * 2019/12/11 0011        Fu       v1.0.0         创建
 */
@Api
@RestController
@RequestMapping("/cache")
public class CacheController {

    @Autowired
    private CacheService cacheService;

    /***
     * @Description 清空缓存
     * @author Fu Hao on 2019/12/11 0011 下午 7:49
     * @param  data  description
     * @return
     **/
    @CacheEvict(allEntries = true,value = "cloud-admin")
    @Delete("/clear")
    public int clearCache(){
        return 1;
    }

    /***
     * @Description 分页查询
     * @author Fu Hao on 2019/12/11 0011 下午 8:43
     * @param  data  description
     * @return
     **/
    @ApiOperation(value = "分页查询")
    @GetMapping("")
    public Object page(String pattern,Integer page, Integer size){
        PageInfo pageInfo=cacheService.list(pattern,page,size);
        return RestRes.table(pageInfo);
    }

    /***
     * @Description 物理删除
     * @author Fu Hao on 2019/12/11 0011 下午 8:45
     * @param  data  description
     * @return
     **/
    @ApiOperation(value = "删除")
    @DeleteMapping("/remove/{key}")
    public Object remove(@PathVariable String key){
        cacheService.remove(key);
        return 1;
    }

    /***
     * @Description 通过id获取缓存
     * @author Fu Hao on 2019/12/11 0011 下午 9:16
     * @param  data  description
     * @return
     **/
    @ApiOperation(value = "查询一条记录")
    @GetMapping("/get/{key}")
    public Object get(@PathVariable String key){
        return cacheService.get(key);
    }

    /***
     * @Description 新增一条缓存记录
     * @author Fu Hao on 2019/12/11 0011 下午 9:24
     * @param  data  description
     * @return
     **/
    @ApiOperation(value = "新增一条信息")
    @PostMapping("/add")
    public void add(SysCach sysCach){
       cacheService.add(sysCach);
    }

}

七、service层：CacheService

import com.github.pagehelper.PageInfo;
import com.joyoung.cloud.security.common.entity.admin.SysCach;

/**
 * @ClassName: CacheService
 * @Description:
 * @Version: v1.0.0
 * @Author: Fu Hao
 * @Date: 2019/12/11 0011 下午 7:53
 * Modification History:
 * Date           Author      Version     Description
 * -------------------------------------------------------------
 * 2019/12/11 0011        Fu       v1.0.0         创建
 */
public interface CacheService {
    PageInfo list(String pattern, Integer page, Integer size);

    Boolean remove(String key);

    Object get(String key);

    void add(SysCach sysCach);
}

八、serviceImpl:

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

/**
 * @ClassName: CacheServiceImpl
 * @Description:
 * @Version: v1.0.0
 * @Author: Fu Hao
 * @Date: 2019/12/11 0011 下午 7:54
 * Modification History:
 * Date           Author      Version     Description
 * -------------------------------------------------------------
 * 2019/12/11 0011        Fu Hao      v1.0.0         创建
 */
@Service("CacheService")
public class CacheServiceImpl implements CacheService {


    @Autowired
    private StringRedisTemplate redisTemplate;

    /***  返回所有符合条件的key
     * @Description
     * @author Fu Hao on 2019/12/11 0011 下午 8:14
     * @param  data  description
     * @return
     **/
    @Override
    public PageInfo list(String pattern, Integer page, Integer size) {
       page=page==null?0:page;
       size=size==null?0:size;
       pattern= StringUtils.isEmpty(pattern)?"*":pattern;
       Set<String> keys=redisTemplate.keys("*"+pattern+"*");
        List<SysCach> sysCachs=new ArrayList<>();
        for (String key:keys){
            SysCach sysCach=new SysCach();
            //通过获取Redis里面的value
            String value=redisTemplate.opsForValue().get(key);
            Long outOfTime=redisTemplate.getExpire(key);
            sysCach.setKey(key);
            sysCach.setValue(value);
            sysCach.setOutOfTime(outOfTime);
            sysCachs.add(sysCach);
        }
        return new PageInfo<>(sysCachs);
    }

    /***
     * @Description 删除
     * @author Fu Hao on 2019/12/11 0011 下午 8:46
     * @param  data  description
     * @return
     **/
    @Override
    public Boolean remove(String key) {
        return redisTemplate.delete(key);
    }

    @Override
    public Object get(String key) {
        DataType dataType=redisTemplate.type(key);
        Object val=null;
        switch (dataType){
            case NONE:
                break;
            case STRING:
                val=redisTemplate.opsForValue().get(key);
                break;
            case SET:
                val=redisTemplate.opsForSet().members(key);
                break;
            case HASH:
                val=redisTemplate.opsForHash().entries(key);
                break;
            case LIST:
                val=redisTemplate.opsForList().size(key);
                break;
            case ZSET:
                val=redisTemplate.opsForZSet().size(key);
                break;
                default:
        }
        return val;
    }

    @Override
    public void add(SysCach sysCach) {
        String key=sysCach.getKey();
        String value=sysCach.getValue();
        redisTemplate.opsForValue().set(key,value);
    }
}