还是在kafka-demo的模块里实现
<dependency>
<groupId>org.apache.kafkagroupId>
<artifactId>kafka-streamsartifactId>
<exclusions>
<exclusion>
<artifactId>connect-jsonartifactId>
<groupId>org.apache.kafkagroupId>
exclusion>
<exclusion>
<groupId>org.apache.kafkagroupId>
<artifactId>kafka-clientsartifactId>
exclusion>
exclusions>
dependency>
public class KafkaStreamQuickStart {
public static void main(String[] args) {
//kafka的配置信息
Properties prop = new Properties();
prop.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG,"192.168.204.129:9092");
prop.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, Serdes.String().getClass());
prop.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, Serdes.String().getClass());
prop.put(StreamsConfig.APPLICATION_ID_CONFIG,"streams-quickstart");
//stream 构建器
StreamsBuilder streamsBuilder = new StreamsBuilder();
//流式计算
streamProcessor(streamsBuilder);
//创建kafkaStream对象
KafkaStreams kafkaStreams = new KafkaStreams(streamsBuilder.build(),prop);
//开启流式计算
kafkaStreams.start();
}
/**
* 流式计算
* 消息的内容:hello kafka hello itcast
* @param streamsBuilder
*/
private static void streamProcessor(StreamsBuilder streamsBuilder) {
//创建kstream对象,同时指定从那个topic中接收消息
KStream<String, String> stream = streamsBuilder.stream("itcast-topic-input");
/**
* 处理消息的value
*/
stream.flatMapValues(new ValueMapper<String, Iterable<String>>() {
@Override
public Iterable<String> apply(String value) {
return Arrays.asList(value.split(" "));
}
})
//按照value进行聚合处理
.groupBy((key,value)->value)
//时间窗口
.windowedBy(TimeWindows.of(Duration.ofSeconds(10)))
//统计单词的个数
.count()
//转换为kStream
.toStream()
.map((key,value)->{
System.out.println("key:"+key+",vlaue:"+value);
return new KeyValue<>(key.key().toString(),value.toString());
})
//发送消息
.to("itcast-topic-out");
}
}
修改com.heima.kafka.sample.ProducerQuickStart的方法
public class ProducerQuickStart {
public static void main(String[] args) throws ExecutionException, InterruptedException {
//1.kafka的配置信息
Properties properties = new Properties();
//kafka的连接地址
properties.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG,"192.168.204.129:9092");
//发送失败,失败的重试次数
properties.put(ProducerConfig.RETRIES_CONFIG,5);
//消息key的序列化器
properties.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG,"org.apache.kafka.common.serialization.StringSerializer");
//消息value的序列化器
properties.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG,"org.apache.kafka.common.serialization.StringSerializer");
//2.生产者对象
KafkaProducer<String,String> producer = new KafkaProducer<String, String>(properties);
/**
* 第一个参数:topic 第二个参数:key 第三个参数:value
*/
//封装发送的消息
//ProducerRecord record = new ProducerRecord("topic-first","key-001","hello kafka");
for(int i=0;i<5;i++){
ProducerRecord<String,String> record = new ProducerRecord<String, String>("itcast-topic-input","hello kafka"+" "+i);
//3.发送消息
producer.send(record);
}
producer.close();
修改com.heima.kafka.sample.ConsumerQuickStart的方法
public class ConsumerQuickStart {
public static void main(String[] args) {
//1.添加kafka的配置信息
Properties properties = new Properties();
//kafka的连接地址
properties.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "192.168.204.129:9092");
//消费者组
properties.put(ConsumerConfig.GROUP_ID_CONFIG, "group1");
//消息的反序列化器
properties.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");
properties.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");
//手动提交偏移量
//properties.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, "false");
//2.消费者对象
KafkaConsumer<String, String> consumer = new KafkaConsumer<String, String>(properties);
//3.订阅主题
consumer.subscribe(Collections.singletonList("itcast-topic-out"));
//当前线程一直处于监听状态
while (true) {
//4.获取消息
ConsumerRecords<String, String> consumerRecords = consumer.poll(Duration.ofMillis(1000));
for (ConsumerRecord<String, String> consumerRecord : consumerRecords) {
System.out.println(consumerRecord.key());
System.out.println(consumerRecord.value());
System.out.println(consumerRecord.offset());
System.out.println(consumerRecord.partition());
}
}
}
}
先启动消费者,再启动kafkaStream,再启动生产者
发送消息为"hello kafka"+" "+i
,一共五次
符合我们发的
在kafka-demo中创建com.heima.kafka.config.KafkaStreamConfig类
/**
* 通过重新注册KafkaStreamsConfiguration对象,设置自定配置参数
*/
@Getter
@Setter
@Configuration
@EnableKafkaStreams
@ConfigurationProperties(prefix="kafka")
public class KafkaStreamConfig {
private static final int MAX_MESSAGE_SIZE = 16* 1024 * 1024;
private String hosts;
private String group;
@Bean(name = KafkaStreamsDefaultConfiguration.DEFAULT_STREAMS_CONFIG_BEAN_NAME)
public KafkaStreamsConfiguration defaultKafkaStreamsConfig() {
Map<String, Object> props = new HashMap<>();
props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, hosts);//连接信息
props.put(StreamsConfig.APPLICATION_ID_CONFIG, this.getGroup()+"_stream_aid");//组
props.put(StreamsConfig.CLIENT_ID_CONFIG, this.getGroup()+"_stream_cid");//应用名称
props.put(StreamsConfig.RETRIES_CONFIG, 10);//重试次数
props.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, Serdes.String().getClass());//key序列化器
props.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, Serdes.String().getClass());
return new KafkaStreamsConfiguration(props);
}
}
修改heima-leadnews-test/kafka-demo/src/main/resources/application.yaml
将其放到最底下
kafka:
hosts: 192.168.204.129:9092
group: ${spring.application.name}
server:
port: 9991
spring:
application:
name: kafka-demo
kafka:
bootstrap-servers: 192.168.204.129:9092
producer:
retries: 10
key-serializer: org.apache.kafka.common.serialization.StringSerializer
value-serializer: org.apache.kafka.common.serialization.StringSerializer
consumer:
group-id: ${spring.application.name}-test
key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
value-deserializer: org.apache.kafka.common.serialization.StringDeserializer
kafka:
hosts: 192.168.204.129:9092
group: ${spring.application.name}
创建com.heima.kafka.stream.KafkaStreamHelloListener
等于KStream放入spring容器中进行直接监听
@Configuration
@Slf4j
public class KafkaStreamHelloListener {
@Bean
public KStream<String,String> kStream(StreamsBuilder streamsBuilder){
//创建kstream对象,同时指定从那个topic中接收消息
KStream<String, String> stream = streamsBuilder.stream("itcast-topic-input");
stream.flatMapValues(new ValueMapper<String, Iterable<String>>() {
@Override
public Iterable<String> apply(String value) {
return Arrays.asList(value.split(" "));
}
})
//根据value进行聚合分组
.groupBy((key,value)->value)
//聚合计算时间间隔
.windowedBy(TimeWindows.of(Duration.ofSeconds(10)))
//求单词的个数
.count()
.toStream()
//处理后的结果转换为string字符串
.map((key,value)->{
System.out.println("key:"+key+",value:"+value);
return new KeyValue<>(key.key().toString(),value.toString());
})
//发送消息
.to("itcast-topic-out");
return stream;
}
}
启动kafka启动类,启动消费者和生产者
发送消息是"hello kafka",一共五次
在heima-leadnews-behavior微服务中集成kafka生产者配置
spring:
application:
name: leadnews-behavior
kafka:
bootstrap-servers: 192.168.204.129:9092
producer:
retries: 10
key-serializer: org.apache.kafka.common.serialization.StringSerializer
value-serializer: org.apache.kafka.common.serialization.StringSerializer
定义消息发送封装类:UpdateArticleMess
在heima-leadnews-model中创建com.heima.model.message.UpdateArticleMess实体类
package com.heima.model.message;
import lombok.Data;
@Data
public class UpdateArticleMess {
/**
* 修改文章的字段类型
*/
private UpdateArticleType type;
/**
* 文章ID
*/
private Long articleId;
/**
* 修改数据的增量,可为正负
*/
private Integer add;
public enum UpdateArticleType{
COLLECTION,COMMENT,LIKES,VIEWS;
}
}
在heima-leadnews-common中创建com.heima.common.constants.HotArticleConstants常量类
package com.heima.common.constants;
public class HotArticleConstants {
public static final String HOT_ARTICLE_SCORE_TOPIC="hot.article.score.topic";
}
点赞之后就要发送消息了,所以去修改用户点赞的实现类com.heima.behavior.service.impl.ApLikesBehaviorServiceImpl
@Service
@Transactional
@Slf4j
public class ApLikesBehaviorServiceImpl implements ApLikesBehaviorService {
@Autowired
private CacheService cacheService;
@Autowired
private KafkaTemplate<String, String> kafkaTemplate;
@Override
public ResponseResult like(LikesBehaviorDto dto) {
//1.检查参数
if (dto == null || dto.getArticleId() == null || checkParam(dto)) {
return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
}
//2.是否登录
ApUser user = AppThreadLocalUtil.getUser();
if (user == null) {
return ResponseResult.errorResult(AppHttpCodeEnum.NEED_LOGIN);
}
//组装发送给kafka的消息类
UpdateArticleMess message =new UpdateArticleMess();
message.setArticleId(dto.getArticleId());
message.setType(UpdateArticleMess.UpdateArticleType.LIKES);
//3.点赞 保存数据
if (dto.getOperation() == 0) {
Object obj = cacheService.hGet(BehaviorConstants.LIKE_BEHAVIOR + dto.getArticleId().toString(), user.getId().toString());
if (obj != null) {
return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID, "已点赞");
}
// 保存当前key
log.info("保存当前key:{} ,{}, {}", dto.getArticleId(), user.getId(), dto);
cacheService.hPut(BehaviorConstants.LIKE_BEHAVIOR + dto.getArticleId().toString(), user.getId().toString(), JSON.toJSONString(dto));
//添加行为的正负
message.setAdd(1);
} else {
// 删除当前key
log.info("删除当前key:{}, {}", dto.getArticleId(), user.getId());
cacheService.hDelete(BehaviorConstants.LIKE_BEHAVIOR + dto.getArticleId().toString(), user.getId().toString());
//添加行为的正负
message.setAdd(-1);
}
//4.给kafka发送消息
kafkaTemplate.send(HotArticleConstants.HOT_ARTICLE_SCORE_TOPIC, JSON.toJSONString(message));
return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
}
/**
* 检查参数
*
* @return
*/
private boolean checkParam(LikesBehaviorDto dto) {
if (dto.getType() > 2 || dto.getType() < 0 || dto.getOperation() > 1 || dto.getOperation() < 0) {
return true;
}
return false;
}
}
点赞有,阅读都有,一样需要改
@Service
@Transactional
@Slf4j
public class ApReadBehaviorServiceImpl implements ApReadBehaviorService {
@Autowired
private CacheService cacheService;
@Autowired
private KafkaTemplate<String, String> kafkaTemplate;
@Override
public ResponseResult readBehavior(ReadBehaviorDto dto) {
//1.检查参数
if (dto == null || dto.getArticleId() == null) {
return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
}
//2.是否登录
ApUser user = AppThreadLocalUtil.getUser();
if (user == null) {
return ResponseResult.errorResult(AppHttpCodeEnum.NEED_LOGIN);
}
//组装发送给kafka的消息类
UpdateArticleMess message =new UpdateArticleMess();
message.setArticleId(dto.getArticleId());
message.setType(UpdateArticleMess.UpdateArticleType.VIEWS);
//更新阅读次数
String readBehaviorJson = (String) cacheService.hGet(BehaviorConstants.READ_BEHAVIOR + dto.getArticleId().toString(), user.getId().toString());
if (StringUtils.isNotBlank(readBehaviorJson)) {
ReadBehaviorDto readBehaviorDto = JSON.parseObject(readBehaviorJson, ReadBehaviorDto.class);
dto.setCount((short) (readBehaviorDto.getCount() + dto.getCount()));
}
// 保存当前key
log.info("保存当前key:{} {} {}", dto.getArticleId(), user.getId(), dto);
cacheService.hPut(BehaviorConstants.READ_BEHAVIOR + dto.getArticleId().toString(), user.getId().toString(), JSON.toJSONString(dto));
//添加行为的正负
message.setAdd(1);
//发送消息
kafkaTemplate.send(HotArticleConstants.HOT_ARTICLE_SCORE_TOPIC, JSON.toJSONString(message));
return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
}
}
因为用户行为最后都体现在文章上面,所以kafkaStream的数据聚合应该在文章微服务中。
在heima-leadnews-article中创建com.heima.article.config.KafkaStreamConfig配置类
@Getter
@Setter
@Configuration
@EnableKafkaStreams
@ConfigurationProperties(prefix="kafka")
public class KafkaStreamConfig {
private static final int MAX_MESSAGE_SIZE = 16* 1024 * 1024;
private String hosts;
private String group;
@Bean(name = KafkaStreamsDefaultConfiguration.DEFAULT_STREAMS_CONFIG_BEAN_NAME)
public KafkaStreamsConfiguration defaultKafkaStreamsConfig() {
Map<String, Object> props = new HashMap<>();
props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, hosts);//连接信息
props.put(StreamsConfig.APPLICATION_ID_CONFIG, this.getGroup()+"_stream_aid");//组
props.put(StreamsConfig.CLIENT_ID_CONFIG, this.getGroup()+"_stream_cid");//应用名称
props.put(StreamsConfig.RETRIES_CONFIG, 10);//重试次数
props.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, Serdes.String().getClass());//key序列化器
props.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, Serdes.String().getClass());
return new KafkaStreamsConfiguration(props);
}
}
在nacos中为文章微服务添加kafkaStream的配置
kafka:
hosts: 192.168.204.129:9092
group: ${spring.application.name}
在com.heima.common.constants.HotArticleConstants中添加HOT_ARTICLE_INCR_HANDLE_TOPIC
public class HotArticleConstants {
public static final String HOT_ARTICLE_SCORE_TOPIC="hot.article.score.topic";
public static final String HOT_ARTICLE_INCR_HANDLE_TOPIC="hot.article.incr.handle.topic";
}
因为聚合后的数据是COLLECTION:0,COMMENT:0,LIKES:0,VIEWS:0,不包含文章id,所以需要一个类把他们封装起来
在heima-leadnews-model中创建com.heima.model.message.ArticleVisitStreamMess实体类
@Data
public class ArticleVisitStreamMess {
/**
* 文章id
*/
private Long articleId;
/**
* 阅读
*/
private int view;
/**
* 收藏
*/
private int collect;
/**
* 评论
*/
private int comment;
/**
* 点赞
*/
private int like;
}
定义stream,接收消息并聚合,创建com.heima.article.stream.HotArticleStreamHandler类
@Configuration
@Slf4j
public class HotArticleStreamHandler {
@Bean
public KStream<String,String> kStream(StreamsBuilder streamsBuilder){
//接收消息
KStream<String,String> stream = streamsBuilder.stream(HotArticleConstants.HOT_ARTICLE_SCORE_TOPIC);
//聚合流式处理
stream.map((key,value)->{
UpdateArticleMess mess = JSON.parseObject(value, UpdateArticleMess.class);
//重置消息的key:1234343434 和 value: likes:1
return new KeyValue<>(mess.getArticleId().toString(),mess.getType().name()+":"+mess.getAdd());
})
//按照文章id进行聚合
.groupBy((key,value)->key)
//时间窗口
.windowedBy(TimeWindows.of(Duration.ofSeconds(10)))
/**
* 自行的完成聚合的计算
*/
.aggregate(new Initializer<String>() {
/**
* 初始方法,返回值是消息的value 初始值,也就是aggValue
* @return
*/
@Override
public String apply() {
return "COLLECTION:0,COMMENT:0,LIKES:0,VIEWS:0";
}
/**
* 真正的聚合操作,返回值是消息的value
*/
}, new Aggregator<String, String, String>() {
/**
* key:文章id value:消息的value aggValue:初始值
* @param key key:1234343434
* @param value value: likes:1
* @param aggValue 初始值 COLLECTION:0,COMMENT:0,LIKES:0,VIEWS:0
* @return
*/
@Override
public String apply(String key, String value, String aggValue) {
if(StringUtils.isBlank(value)){
return aggValue;
}
String[] aggAry = aggValue.split(",");
int col = 0,com=0,lik=0,vie=0;
for (String agg : aggAry) {
String[] split = agg.split(":");
/**
* 获得初始值,也是时间窗口内计算之后的值
*/
switch (UpdateArticleMess.UpdateArticleType.valueOf(split[0])){
case COLLECTION:
col = Integer.parseInt(split[1]);
break;
case COMMENT:
com = Integer.parseInt(split[1]);
break;
case LIKES:
lik = Integer.parseInt(split[1]);
break;
case VIEWS:
vie = Integer.parseInt(split[1]);
break;
}
}
/**
* 累加操作
*/
String[] valAry = value.split(":");
switch (UpdateArticleMess.UpdateArticleType.valueOf(valAry[0])){
case COLLECTION:
col += Integer.parseInt(valAry[1]);
break;
case COMMENT:
com += Integer.parseInt(valAry[1]);
break;
case LIKES:
lik += Integer.parseInt(valAry[1]);
break;
case VIEWS:
vie += Integer.parseInt(valAry[1]);
break;
}
String formatStr = String.format("COLLECTION:%d,COMMENT:%d,LIKES:%d,VIEWS:%d", col, com, lik, vie);
System.out.println("文章的id:"+key);
System.out.println("当前时间窗口内的消息处理结果:"+formatStr);
return formatStr;
}
}, Materialized.as("hot-atricle-stream-count-001"))
.toStream()
/**
* 格式化消息的key和value
*/
.map((key,value)->{
return new KeyValue<>(key.key().toString(),formatObj(key.key().toString(),value));
})
//发送消息
.to(HotArticleConstants.HOT_ARTICLE_INCR_HANDLE_TOPIC);
return stream;
}
/**
* 格式化消息的value数据
* @param articleId
* @param value
* @return
*/
public String formatObj(String articleId,String value){
ArticleVisitStreamMess mess = new ArticleVisitStreamMess();
mess.setArticleId(Long.valueOf(articleId));
//COLLECTION:0,COMMENT:0,LIKES:0,VIEWS:0
String[] valAry = value.split(",");
for (String val : valAry) {
String[] split = val.split(":");
switch (UpdateArticleMess.UpdateArticleType.valueOf(split[0])){
case COLLECTION:
mess.setCollect(Integer.parseInt(split[1]));
break;
case COMMENT:
mess.setComment(Integer.parseInt(split[1]));
break;
case LIKES:
mess.setLike(Integer.parseInt(split[1]));
break;
case VIEWS:
mess.setView(Integer.parseInt(split[1]));
break;
}
}
log.info("聚合消息处理之后的结果为:{}",JSON.toJSONString(mess));
return JSON.toJSONString(mess);
}
}
创建com.heima.article.listener.ArticleIncrHandleListener用于监听和处理聚合后的消息
@Component
@Slf4j
public class ArticleIncrHandleListener {
@Autowired
private ApArticleService apArticleService;
@KafkaListener(topics = HotArticleConstants.HOT_ARTICLE_INCR_HANDLE_TOPIC)
public void onMessage(String mess){
if(StringUtils.isNotBlank(mess)){
ArticleVisitStreamMess articleVisitStreamMess = JSON.parseObject(mess, ArticleVisitStreamMess.class);
apArticleService.updateScore(articleVisitStreamMess);
}
}
}
在文章微服务的service中完善功能
接口
void updateScore(ArticleVisitStreamMess articleVisitStreamMess);
实现:
/**
* 更新文章的分值 同时更新缓存中的热点文章数据
* @param mess
*/
@Override
public void updateScore(ArticleVisitStreamMess mess) {
//1.更新文章的阅读、点赞、收藏、评论的数量
ApArticle apArticle = updateArticle(mess);
//2.计算文章的分值
Integer score = computeScore(apArticle);
score = score * 3;
//3.替换当前文章对应频道的热点数据
replaceDataToRedis(apArticle, score, ArticleConstants.HOT_ARTICLE_FIRST_PAGE + apArticle.getChannelId());
//4.替换推荐对应的热点数据
replaceDataToRedis(apArticle, score, ArticleConstants.HOT_ARTICLE_FIRST_PAGE + ArticleConstants.DEFAULT_TAG);
}
/**
* 替换数据并且存入到redis
* @param apArticle
* @param score
* @param s
*/
private void replaceDataToRedis(ApArticle apArticle, Integer score, String s) {
String articleListStr = cacheService.get(s);
if (StringUtils.isNotBlank(articleListStr)) {
List<HotArticleVo> hotArticleVoList = JSON.parseArray(articleListStr, HotArticleVo.class);
boolean flag = true;
//如果缓存中存在该文章,只更新分值
for (HotArticleVo hotArticleVo : hotArticleVoList) {
if (hotArticleVo.getId().equals(apArticle.getId())) {
hotArticleVo.setScore(score);
flag = false;
break;
}
}
//如果缓存中不存在,查询缓存中分值最小的一条数据,进行分值的比较,如果当前文章的分值大于缓存中的数据,就替换
if (flag) {
if (hotArticleVoList.size() >= 30) {
hotArticleVoList = hotArticleVoList.stream().sorted(Comparator.comparing(HotArticleVo::getScore).reversed()).collect(Collectors.toList());
HotArticleVo lastHot = hotArticleVoList.get(hotArticleVoList.size() - 1);
if (lastHot.getScore() < score) {
hotArticleVoList.remove(lastHot);
HotArticleVo hot = new HotArticleVo();
BeanUtils.copyProperties(apArticle, hot);
hot.setScore(score);
hotArticleVoList.add(hot);
}
} else {
HotArticleVo hot = new HotArticleVo();
BeanUtils.copyProperties(apArticle, hot);
hot.setScore(score);
hotArticleVoList.add(hot);
}
}
//缓存到redis
hotArticleVoList = hotArticleVoList.stream().sorted(Comparator.comparing(HotArticleVo::getScore).reversed()).collect(Collectors.toList());
cacheService.set(s, JSON.toJSONString(hotArticleVoList));
}
}
/**
* 更新文章行为数量
* @param mess
*/
private ApArticle updateArticle(ArticleVisitStreamMess mess) {
ApArticle apArticle = getById(mess.getArticleId());
apArticle.setCollection(apArticle.getCollection()==null?0:apArticle.getCollection()+mess.getCollect());
apArticle.setComment(apArticle.getComment()==null?0:apArticle.getComment()+mess.getComment());
apArticle.setLikes(apArticle.getLikes()==null?0:apArticle.getLikes()+mess.getLike());
apArticle.setViews(apArticle.getViews()==null?0:apArticle.getViews()+mess.getView());
updateById(apArticle);
return apArticle;
}
/**
* 计算文章的具体分值
* @param apArticle
* @return
*/
private Integer computeScore(ApArticle apArticle) {
Integer score = 0;
if(apArticle.getLikes() != null){
score += apArticle.getLikes() * ArticleConstants.HOT_ARTICLE_LIKE_WEIGHT;
}
if(apArticle.getViews() != null){
score += apArticle.getViews()* ArticleConstants.HOT_ARTICLE_VIEW_WEIGHT;
}
if(apArticle.getComment() != null){
score += apArticle.getComment() * ArticleConstants.HOT_ARTICLE_COMMENT_WEIGHT;
}
if(apArticle.getCollection() != null){
score += apArticle.getCollection() * ArticleConstants.HOT_ARTICLE_COLLECTION_WEIGHT;
}
return score;
}
前端有问题,就不测试了,功能能明白就行。