SpringBootAOP控制Redis自動(dòng)緩存和更新的示例

<!-- redis -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-data-redis</artifactId>
      <version>2.0.4.RELEASE</version>
    </dependency>

/**
 * @Description: redis緩存注解 編寫(xiě)在需要緩存的類(lèi)上
 **/
@Documented
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
public @interface RedisCache {
}

package com.ys.edu.aop;
import com.ys.edu.utils.ResultUtils;
import org.apache.log4j.Logger;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import org.springframework.stereotype.Service;
import org.aspectj.lang.reflect.MethodSignature;
import javax.annotation.Resource;
import java.util.Arrays;
import java.util.Set;
import java.util.concurrent.TimeUnit;
/**
 * @ClassName RedisAOP
 * @description: redis 切面緩存
 **/
@Aspect
@Service
public class RedisAOP {
  private static final Logger logger = Logger.getLogger(RedisAOP.class);
  private static final Integer TIME_OUT = 30 ; //redis 存活時(shí)長(zhǎng) 分鐘
  @Resource
  private RedisTemplate redisTemplate;
  /**
   * @Title: queryCachePointcut
   * @Description: 定義切點(diǎn)為緩存注解
   * @return void
   **/
  @Pointcut("@within(com.ys.edu.annotation.RedisCache)")
  public void queryCachePointcut(){
  }
  @Around("queryCachePointcut()")
  public Object Interceptor(ProceedingJoinPoint joinPoint) throws Throwable{
    long beginTime = System.currentTimeMillis();
    MethodSignature signature = (MethodSignature) joinPoint.getSignature();
    //類(lèi)路徑名
    String classPathName = joinPoint.getTarget().getClass().getName();
    //類(lèi)名
    String className = classPathName.substring(classPathName.lastIndexOf(".")+1,classPathName.length());
    //獲取方法名
    String methodName = signature.getMethod().getName();
    String[] strings = signature.getParameterNames();
    String key = className+"_"+methodName+"_"+Arrays.toString(strings);
    if((methodName.indexOf("select") != -1 && methodName.substring(0,6).equalsIgnoreCase("select")) || (methodName.indexOf("query") != -1 && methodName.substring(0,5).equalsIgnoreCase("query")) || (methodName.indexOf("get") != -1 && methodName.substring(0,3).equalsIgnoreCase("get"))){
      Object data = getObject(beginTime,joinPoint,key);
      if(data != null){
        return ResultUtils.success(data);
      }
      return joinPoint.proceed();
    }else if((methodName.indexOf("add") != -1 && methodName.substring(0,3).equalsIgnoreCase("add")) || (methodName.indexOf("insert") != -1 && methodName.substring(0,6).equalsIgnoreCase("insert")) || (methodName.indexOf("update") != -1 && methodName.substring(0,6).equalsIgnoreCase("update"))){
      Set<String> keys = redisTemplate.keys(className+"*");
      redisTemplate.delete(keys);
      logger.warn("執(zhí)行方法 : [ "+methodName+" ] : 清除 key 包含 [ "+className+" ] 的緩存數(shù)據(jù)");
      logger.warn("AOP 緩存切面處理 >>>> end 耗時(shí)：" + (System.currentTimeMillis() - beginTime));
    }
    // 調(diào)用原始方法
    return joinPoint.proceed();
  }
  /**
   * @Title: getObject
   * @Description: 使用key獲取數(shù)據(jù) 不存在則查詢(xún)添加
   * @param beginTime : 切面開(kāi)始時(shí)間
   * @param joinPoint : 切面對(duì)象
   * @param key : 獲取redis數(shù)據(jù)的key值
   * @return java.lang.Object
   **/
  private Object getObject(long beginTime,ProceedingJoinPoint joinPoint,String key) throws Throwable {
    ValueOperations<String, Object> operations = redisTemplate.opsForValue();
    boolean hasKey = redisTemplate.hasKey(key);
    Object object = null;
    if(hasKey){
      // 緩存中獲取到數(shù)據(jù)，直接返回。
      object = operations.get(key);
      logger.warn("從緩存中獲取到 key 為 ["+key+" ] : 的數(shù)據(jù) >>>> " + object.toString());
      logger.warn("AOP 緩存切面處理 >>>> end 耗時(shí)：" + (System.currentTimeMillis() - beginTime));
      return object;
    }
    if(object == null) {
      // 緩存中沒(méi)有數(shù)據(jù)，調(diào)用原始方法查詢(xún)數(shù)據(jù)庫(kù)
      object = joinPoint.proceed();
      operations.set(key, object, TIME_OUT, TimeUnit.MINUTES); // 設(shè)置超時(shí)時(shí)間30分鐘
      logger.warn("向 Redis 添加 key 為 ["+key+" ] , 存活時(shí)長(zhǎng)為 "+TIME_OUT+" min 的數(shù)據(jù) >>>> " + object.toString());
      logger.warn("AOP 緩存切面處理 >>>> end 耗時(shí)：" + (System.currentTimeMillis() - beginTime));
    }
    return object;
  }
  @Autowired(required = false)
  public void setRedisTemplate(RedisTemplate redisTemplate) {
    RedisSerializer stringSerializer = new StringRedisSerializer();//序列化為String
    Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);//序列化為Json
    redisTemplate.setKeySerializer(stringSerializer);
    redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
    redisTemplate.setHashKeySerializer(stringSerializer);
    redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);
    this.redisTemplate = redisTemplate;
  }
}

package com.ys.edu.bean;
import java.io.Serializable;
/**
 * @ClassName ResultBody
 * @description: RestFul API 方法返回值格式統(tǒng)一實(shí)體類(lèi)
 **/
public class ResultBody<T> implements Serializable {
  private static final long serialVersionUID = 694858559908048578L;
  private Integer code;
  private String msg;
  private Integer count = 0;
  private T data;
  public ResultBody(){}
  public ResultBody(Integer code, String msg,Integer count,T data) {
    this.code = code;
    this.msg = msg;
    this.count = count;
    this.data = data;
  }
  public ResultBody(Integer code, String msg,T data) {
    this.code = code;
    this.msg = msg;
    this.data = data;
  }
  /**
   * @Title: success
   * @Description: 成功 (無(wú)參) 默認(rèn) code : " 0 " msg : "請(qǐng)求成功" , count : 0 , data: null
   * @date 2018/11/29 10:28
   **/
  public ResultBody success(){
    return success((T) null);
  }
  /**
   * @Title: success
   * @Description:  成功  默認(rèn) code : " 0 " msg : "請(qǐng)求成功"
   * @param count : 數(shù)據(jù)條數(shù)
   * @param data : 數(shù)據(jù)
   * @date 2018/11/29 11:46
   **/
  public ResultBody success(Integer count,T data){
    return new ResultBody(0,"請(qǐng)求成功!",count,data);
  }
  /**
   * @Title: success
   * @Description: 成功  默認(rèn) code : " 0 "
   * @param msg : 提示信息
   * @param count : 數(shù)據(jù)條數(shù)
   * @param data :  數(shù)據(jù)
   **/
  public ResultBody success(String msg,Integer count,T data){
    return new ResultBody(0,msg,count,data);
  }
  /**
   * @Title: success
   * @Description: 成功  默認(rèn) code : " 0 " , msg : "請(qǐng)求成功"
   * @param data : 數(shù)據(jù)
   **/
  public ResultBody success(T data){
    return new ResultBody(0,"請(qǐng)求成功!",data);
  }
  /**
   * @Title: success
   * @Description: 成功  默認(rèn) code : " 0 "
   * @param msg : 提示信息
   * @param data : 數(shù)據(jù)
   * @date 2018/11/29 11:47
   **/
  public ResultBody success(String msg,T data){
    return new ResultBody(0,msg,data);
  }
  /**
   * @Title: success
   * @Description: 成功  默認(rèn) code : " 0 "
   * @param code : 枚舉類(lèi)代碼
   * @param data : 數(shù)據(jù)
   **/
  public ResultBody success(Code code,T data){
    return new ResultBody(code.getCode(),code.getMsg(),data);
  }
  /**
   * @Title: success
   * @Description: 成功  默認(rèn) code : " 0 "
   * @param code : 枚舉類(lèi)代碼
   **/
  public ResultBody success(Code code){
    return new ResultBody(code.getCode(),code.getMsg(),null);
  }
  /**
   * @Title: error
   * @Description: 錯(cuò)誤  默認(rèn) data : null
   * @param code : 錯(cuò)誤代碼
   * @param msg : 錯(cuò)誤信息
   **/
  public ResultBody error(Integer code,String msg){
    return new ResultBody(code,msg,null);
  }
  /**
   * @Title: error
   * @Description: 錯(cuò)誤  默認(rèn) data : null
   * @param code : 枚舉類(lèi)錯(cuò)誤代碼
   **/
  public ResultBody error(Code code){
    return new ResultBody(code.getCode(),code.getMsg(),null);
  }
  public Integer getCode() {
    return code;
  }
  public void setCode(Integer code) {
    this.code = code;
  }
  public String getMsg() {
    return msg;
  }
  public void setMsg(String msg) {
    this.msg = msg;
  }
  public Integer getCount() {
    return count;
  }
  public void setCount(Integer count) {
    this.count = count;
  }
  public T getData() {
    return data;
  }
  public void setData(T data) {
    this.data = data;
  }
}

package com.ys.edu.bean;
/**
 * @ClassName Code
 * @description: 自定義提示枚舉類(lèi)
 **/
public enum Code {
  /**
   * @Description: 請(qǐng)求狀態(tài)碼
   **/
  SUCCESS(0,"請(qǐng)求成功"),
  ERROR(-1,"請(qǐng)求錯(cuò)誤");
  private Integer code;
  private String msg;
  public Integer getCode() {
    return code;
  }
  public void setCode(Integer code) {
    this.code = code;
  }
  public String getMsg() {
    return msg;
  }
  public void setMsg(String msg) {
    this.msg = msg;
  }
  Code(Integer code, String msg){
    this.code = code;
    this.msg = msg;
  }
}

package com.ys.edu.utils;
import com.ys.edu.bean.Code;
import com.ys.edu.bean.ResultBody;
import com.ys.edu.entity.Page;
import java.util.HashMap;
import java.util.Map;
/**
 * @ClassName ResultUtils
 * @description: 返回結(jié)果工具類(lèi)
 **/
public class ResultUtils {
  /**
   * @Title: success
   * @Description: 無(wú)參成功返回  默認(rèn)值 code : "0" , msg : "請(qǐng)求成功" , count : 0 , data : null
   **/
  public static ResultBody success(){
    return success((Object)null);
  }
  public static ResultBody success(Object object){
    return success(0,object);
  }
  /**
   * @Title: success
   * @Description: 有參成功返回  默認(rèn)值 code : "0" , msg : "請(qǐng)求成功"
   * @param count : 數(shù)據(jù)條數(shù)
   * @param object : 數(shù)據(jù)
   **/
  public static ResultBody success(Integer count,Object object){
    return new ResultBody().success(count,object);
  }
  /**
   * @Title: success
   * @Description: 有參成功返回  默認(rèn)值 code : "0"
   * @param msg : 提示信息
   * @param count : 數(shù)據(jù)條數(shù)
   * @param object : 數(shù)據(jù)
   **/
  public static ResultBody success(String msg,Integer count,Object object){
    return new ResultBody().success(msg,count,object);
  }
  /**
   * @Title: error
   * @Description: 有參成功返回   默認(rèn)值 code : "0"
   * @param code :
   * @param object : 數(shù)據(jù)
   **/
  public static ResultBody success(Code code,Object object){
    return new ResultBody().success(code,object);
  }
  /**
   * @Title: error
   * @Description: 有參成功返回   默認(rèn)值 code : "0" data : null
   * @param code : 枚舉類(lèi)代碼
   **/
  public static ResultBody success(Code code){
    return new ResultBody().success(code);
  }
  /**
   * @Title: error
   * @Description: 錯(cuò)誤返回格式   默認(rèn)值 data : null
   * @param code : 錯(cuò)誤代碼
   **/
  public static ResultBody error(Integer code,String msg){
    return new ResultBody().error(code,msg);
  }
  /**
   * @Title: error
   * @Description: 錯(cuò)誤返回格式   默認(rèn)值 data : null
   * @param code : 枚舉類(lèi)錯(cuò)誤代碼
   **/
  public static ResultBody error(Code code){
    return new ResultBody().error(code);
  }
  /**
   * @Title: successByLimit
   * @Description: 分頁(yè)返回?cái)?shù)據(jù)格式
   * @param page : 查詢(xún)的頁(yè)數(shù)
   * @param limit : 查詢(xún)的條數(shù)
   * @param totalNum : 數(shù)據(jù)總條數(shù)
   * @param curCount : 當(dāng)前頁(yè)條數(shù)
   * @param object : 查詢(xún)結(jié)果數(shù)據(jù)
   **/
  public static ResultBody successByLimit(Integer page,Integer limit,Integer totalNum,Integer curCount,Object object){
    Map<String,Object> map = new HashMap<>();
    Page pageInfo = new Page();
    pageInfo.setPage(page);
    pageInfo.setLimit(limit);
    pageInfo.setTotalNum(totalNum);
    pageInfo.setTotalPages((totalNum + limit - 1)/limit);
    map.put("page",pageInfo);
    map.put("data",object);
    return success(curCount,map);
  }
}