优化

src/main/java/com/lh/bean/VoteMessage.java

@@ -0,0 +1,15 @@
+package com.lh.bean;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class VoteMessage {
+    private String voterJwcode;      // 投票人ID（JWCode）
+    private String candidateJwcode;  // 候选人ID（JWCode）
+    private String voterName;        // 投票人姓名
+    private String voteTime;         // 投票时间
+}

src/main/java/com/lh/bean/voter.java → src/main/java/com/lh/bean/Voter.java

@@ -9,7 +9,7 @@ import java.time.LocalDateTime;
 @Data
 @NoArgsConstructor
 @AllArgsConstructor
-public class voter {
+public class Voter {
     private Long id;
     private String jwCode;
     private String name;

src/main/java/com/lh/config/CandidateCacheRepository.java

@@ -0,0 +1,80 @@
+package com.lh.config;
+
+import com.lh.bean.Candidate;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.redis.core.RedisTemplate;
+import org.springframework.data.redis.serializer.JdkSerializationRedisSerializer;
+import org.springframework.data.redis.serializer.StringRedisSerializer;
+import org.springframework.stereotype.Repository;
+
+import javax.annotation.PostConstruct;
+import java.util.Set;
+
+@Repository
+public class CandidateCacheRepository {
+
+    @Autowired
+    private RedisTemplate<String, Object> redisTemplate;
+
+    @PostConstruct
+    public void init() {
+        redisTemplate.setKeySerializer(new StringRedisSerializer());
+        redisTemplate.setValueSerializer(new JdkSerializationRedisSerializer());
+        redisTemplate.afterPropertiesSet();
+    }
+
+    // 保存候选人信息到 Redis
+
+    // 保存候选人信息到 Redis
+    public void saveCandidate(Candidate candidate) {
+        String key = "candidate:" + candidate.getJwCode();
+
+        // 确保所有值都是字符串类型
+        redisTemplate.opsForHash().put(key, "id", String.valueOf(candidate.getId()));
+        redisTemplate.opsForHash().put(key, "jwCode", candidate.getJwCode());
+        redisTemplate.opsForHash().put(key, "name", candidate.getName());
+        redisTemplate.opsForHash().put(key, "avatar", candidate.getAvatar());
+        redisTemplate.opsForHash().put(key, "votes", String.valueOf(candidate.getVotes()));
+
+        // 更新 ZSET
+        redisTemplate.opsForZSet().add("candidate:votes", candidate.getJwCode(), candidate.getVotes());
+    }
+
+    // 获取候选人详细信息
+    public Candidate getCandidate(String jwCode) {
+        String key = "candidate:" + jwCode;
+        Candidate candidate = new Candidate();
+
+        Object idObj = redisTemplate.opsForHash().get(key, "id");
+        if (idObj != null) {
+            candidate.setId(Long.parseLong(idObj.toString()));
+        }
+
+        candidate.setJwCode((String) redisTemplate.opsForHash().get(key, "jwCode"));
+        candidate.setName((String) redisTemplate.opsForHash().get(key, "name"));
+        candidate.setAvatar((String) redisTemplate.opsForHash().get(key, "avatar"));
+
+        Object votesObj = redisTemplate.opsForHash().get(key, "votes");
+        if (votesObj != null) {
+            candidate.setVotes(Integer.parseInt(votesObj.toString()));
+        }
+
+        return candidate;
+    }
+
+    // 获取所有候选人的 jwCode 按投票数排序
+    public Set<Object> getCandidateJwCodesByVotes() {
+        return redisTemplate.opsForZSet().reverseRange("candidate:votes", 0, -1);
+    }
+
+    // 删除 Redis 中所有候选人数据
+    public void deleteAllCandidatesFromCache() {
+        Set<Object> jwCodes = redisTemplate.opsForZSet().range("candidate:votes", 0, -1);
+        if (jwCodes != null) {
+            for (Object jwCode : jwCodes) {
+                redisTemplate.delete("candidate:" + jwCode);
+            }
+        }
+        redisTemplate.delete("candidate:votes");
+    }
+}

src/main/java/com/lh/config/RedisConfig.java

@@ -1,51 +1,37 @@
 package com.lh.config;
 
-import org.springframework.cache.CacheManager;
 import org.springframework.cache.annotation.EnableCaching;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
-import org.springframework.data.redis.cache.RedisCacheConfiguration;
-import org.springframework.data.redis.cache.RedisCacheManager;
 import org.springframework.data.redis.connection.RedisConnectionFactory;
+import org.springframework.data.redis.core.RedisTemplate;
 import org.springframework.data.redis.core.StringRedisTemplate;
-import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
-import org.springframework.data.redis.serializer.RedisSerializationContext;
 import org.springframework.data.redis.serializer.StringRedisSerializer;
 
-import java.time.Duration;
-
 @Configuration
 @EnableCaching
 public class RedisConfig {
     @Bean
-    public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {
-        // 基本配置
-        RedisCacheConfiguration defaultCacheConfiguration =
-                RedisCacheConfiguration
-                        .defaultCacheConfig()
-                        //设置key为String
-                        .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()))
-                        //设置value为自动转Json的Object
-                        .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()))
-                        //不缓存null
-                        .disableCachingNullValues()
-                        //缓存数据保存10分钟
-                        .entryTtl(Duration.ofMinutes(10));
-
-        //创建一个redis缓存管理器
-        RedisCacheManager redisCacheManager =
-                RedisCacheManager.RedisCacheManagerBuilder
-                        //Redis连接工厂
-                        .fromConnectionFactory(redisConnectionFactory)
-                        //缓存配置
-                        .cacheDefaults(defaultCacheConfiguration)
-                        .build();
-
-        return redisCacheManager;
+    public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory connectionFactory) {
+        return new StringRedisTemplate(connectionFactory);
     }
 
     @Bean
-    public StringRedisTemplate redisTemplate(RedisConnectionFactory connectionFactory) {
-        return new StringRedisTemplate(connectionFactory);
+    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
+        RedisTemplate<String, Object> template = new RedisTemplate<>();
+        template.setConnectionFactory(redisConnectionFactory);
+
+        // 设置 key 的序列化方式
+        template.setKeySerializer(new StringRedisSerializer());
+
+        // 设置 hash key 和 hash value 的序列化方式
+        template.setHashKeySerializer(new StringRedisSerializer());
+        template.setHashValueSerializer(new StringRedisSerializer());
+
+        // 设置 value 的序列化方式
+        template.setValueSerializer(new StringRedisSerializer());
+
+        return template;
     }
+
 }

src/main/java/com/lh/controller/VoteController.java

@@ -1,6 +1,8 @@
 package com.lh.controller;
 
 import com.lh.bean.RespBean;
+import com.lh.bean.Voter;
+import com.lh.service.VoteConsumer;
 import com.lh.service.VoteService;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
@@ -11,9 +13,14 @@ import org.springframework.web.bind.annotation.*;
 public class VoteController {
     @Autowired
     private VoteService voteService;
+    @Autowired
+    private VoteConsumer voteConsumer;
     //投票
     @PostMapping("/vote")
-    public RespBean vote(String voterJwcode, String candidateJwcode, String voterName) throws Exception {
+    public RespBean vote(@RequestBody Voter voter) throws Exception {
+        String voterJwcode = voter.getJwCode();
+        String candidateJwcode = voter.getCandidateJwCode();
+        String voterName = voter.getName();
         Integer result =voteService.insertVote(voterJwcode, candidateJwcode, voterName);
         return RespBean.ok("投票成功!今日还可以投" + result + "次");
     }

src/main/java/com/lh/mapper/VoterMapper.java

@@ -1,6 +1,6 @@
 package com.lh.mapper;
 
-import com.lh.bean.voter;
+import com.lh.bean.Voter;
 import org.apache.ibatis.annotations.Mapper;
 import org.apache.ibatis.annotations.Param;
 
@@ -9,9 +9,9 @@ import java.util.List;
 @Mapper
 public interface VoterMapper {
     // 查询用户今日投票信息
-    List<voter> countVotesToday(@Param("jwcode") String jwcode);
+    List<Voter> countVotesToday(@Param("jwcode") String jwcode);
     //插入投票记录
     void insertVote(@Param("jwcode") String jwcode, @Param("candidateJwcode") String candidateJwcode,@Param("name") String namne);
     //根据候选人的jwcode查询投票记录
-    List<voter> getVotesByCandidate(@Param("candidateJwcode") String candidateJwcode);
+    List<Voter> getVotesByCandidate(@Param("candidateJwcode") String candidateJwcode);
 }

src/main/java/com/lh/service/VoteConsumer.java

@@ -0,0 +1,85 @@
+package com.lh.service;
+
+import com.lh.bean.Candidate;
+import com.lh.bean.Voter;
+import com.lh.exception.MyException;
+import com.lh.mapper.CandidatesMapper;
+import com.lh.mapper.VoterMapper;
+import org.apache.kafka.clients.consumer.ConsumerRecord;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.redis.core.StringRedisTemplate;
+import org.springframework.kafka.annotation.EnableKafka;
+import org.springframework.kafka.annotation.KafkaListener;
+import org.springframework.stereotype.Service;
+
+import java.time.Duration;
+import java.time.LocalDateTime;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+
+@Service
+@EnableKafka
+public class VoteConsumer {
+    @Autowired
+    private VoterMapper voterMapper;
+    @Autowired
+    private CandidatesMapper candidatesMapper;
+    @Autowired
+    private StringRedisTemplate redisTemplate;
+
+    @KafkaListener(topics = "vote-topic", groupId = "vote-group")
+    public void handleVoteMessage(ConsumerRecord<String, String> record) throws MyException {
+        String message = record.value();
+
+        // 将消息分割为投票信息
+        String[] parts = message.split(",");
+        String voterJwcode = parts[0];
+        String candidateJwcode = parts[1];
+        String voterName = parts[2];
+        String voteTime = parts[3];
+
+        // 处理投票
+        processVote(voterJwcode, candidateJwcode, voterName, voteTime);
+    }
+
+    private boolean processVote(String voterJwcode, String candidateJwcode, String voterName, String voteTime) throws MyException {
+        // 获取候选人信息
+        Candidate candidate = candidatesMapper.getByCandidateJwcode(candidateJwcode);
+
+        // 2. 获取候选人信息
+        if (candidate == null) {
+            throw new MyException("候选人不存在！");
+        }
+
+        // 3. 检查用户是否已经为该候选人投过票
+        List<Voter> hasVotes = voterMapper.countVotesToday(voterJwcode);
+        //遍历列表，判断是否有记录
+        for (Voter vote : hasVotes) {
+            if (vote.getCandidateJwCode().equals(candidateJwcode)) {
+                throw new MyException("已投票，可以选择其他人试试哦~");
+            }
+        }
+
+        // 4. 增加候选人票数
+        if (!candidatesMapper.addVotes(candidateJwcode)) {
+            throw new MyException ("候选人票数更新失败，请联系管理员！");
+        }
+
+        // 5. 插入投票记录
+        voterMapper.insertVote(voterJwcode, candidateJwcode, voterName);
+
+        // 6. 更新 Redis 中的投票次数
+        String redisKey = "vote_count:" + voterJwcode + ":" + LocalDateTime.now().toLocalDate();
+        redisTemplate.opsForValue().increment(redisKey, 1);
+        // 设置 Redis 键的过期时间为当天的23:59:59
+        LocalDateTime now = LocalDateTime.now();
+        LocalDateTime endOfDay = now.toLocalDate().atTime(23, 59, 59);
+        long secondsUntilEndOfDay = Duration.between(now, endOfDay).getSeconds();
+        redisTemplate.expire(redisKey, secondsUntilEndOfDay, TimeUnit.SECONDS);
+        //打印剩余长时间过期
+        System.out.println("Redis键" + redisKey + "将在" + secondsUntilEndOfDay + "秒后过期。");
+        System.out.println("投票成功！用户：" + voterJwcode + " 投给了 " + candidateJwcode);
+        return true;
+    }
+
+}

src/main/java/com/lh/service/VoteProducer.java

@@ -0,0 +1,26 @@
+package com.lh.service;
+
+import com.lh.bean.VoteMessage;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.kafka.core.KafkaTemplate;
+import org.springframework.stereotype.Service;
+
+@Service
+public class VoteProducer {
+
+    private static final String TOPIC = "vote-topic";  // Kafka topic
+
+    @Autowired
+    private KafkaTemplate<String, String> kafkaTemplate;
+
+    // 发送投票消息
+    public void sendVoteMessage(VoteMessage voteMessage) {
+        String message = String.format("%s,%s,%s,%s", 
+                voteMessage.getVoterJwcode(), 
+                voteMessage.getCandidateJwcode(), 
+                voteMessage.getVoterName(), 
+                voteMessage.getVoteTime());
+        
+        kafkaTemplate.send(TOPIC, message);  // 将投票信息发送到Kafka
+    }
+}

src/main/java/com/lh/service/VoteService.java

@@ -1,7 +1,7 @@
 package com.lh.service;
 
 import com.lh.bean.Candidate;
-import com.lh.bean.voter;
+import com.lh.bean.Voter;
 import com.lh.exception.MyException;
 
 import java.util.List;
@@ -12,5 +12,5 @@ public interface VoteService {
     //获取所有候选人
     List<Candidate> getCandidates(String VoterJwcode);
     //获取某个候选人的被投票记录
-    List<voter> getVotesByCandidate(String candidateJwcode);
+    List<Voter> getVotesByCandidate(String candidateJwcode);
 }

src/main/java/com/lh/service/VoteServiceImpl.java

@@ -1,20 +1,25 @@
 package com.lh.service;
 
 import com.lh.bean.Candidate;
-import com.lh.bean.voter;
+import com.lh.bean.VoteMessage;
+import com.lh.bean.Voter;
+import com.lh.config.CandidateCacheRepository;
 import com.lh.exception.MyException;
 import com.lh.mapper.CandidatesMapper;
 import com.lh.mapper.VoterMapper;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
+import org.springframework.data.redis.core.RedisTemplate;
 import org.springframework.data.redis.core.StringRedisTemplate;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
-import java.time.Duration;
+import javax.annotation.PostConstruct;
+import java.sql.Timestamp;
 import java.time.LocalDateTime;
+import java.util.ArrayList;
 import java.util.List;
-import java.util.concurrent.TimeUnit;
+import java.util.Set;
 
 @Service
 public class VoteServiceImpl implements VoteService {
@@ -25,7 +30,22 @@ public class VoteServiceImpl implements VoteService {
     @Value("${vote.limit.daily}")
     private int dailyVoteLimit;  // 每日投票次数限制
     @Autowired
-    private StringRedisTemplate redisTemplate;
+    private StringRedisTemplate stringRedisTemplate;
+    @Autowired
+    private VoteProducer voteProducer;
+    @Autowired
+    private RedisTemplate<String, Object> redisTemplate;
+    @Autowired
+    private CandidateCacheRepository candidateCacheRepository;
+
+    // 初始化时加载所有候选人数据并缓存到 Redis
+    @PostConstruct
+    public void initCandidatesCache() {
+        List<Candidate> candidates = candidatesMapper.getCandidates();  // 从数据库加载所有教师信息
+        for (Candidate candidate : candidates) {
+            candidateCacheRepository.saveCandidate(candidate);  // 将数据保存到 Redis
+        }
+    }
 
     //投票
     @Override
@@ -33,70 +53,59 @@ public class VoteServiceImpl implements VoteService {
     public Integer insertVote(String voterJwcode, String candidateJwcode, String voterName) throws MyException {
         // 1. 检查 Redis 中用户今天的投票次数
         String redisKey = "vote_count:" + voterJwcode + ":" + LocalDateTime.now().toLocalDate();
-        String currentVoteCount = redisTemplate.opsForValue().get(redisKey);
+        String currentVoteCount = stringRedisTemplate.opsForValue().get(redisKey);
 
         int voteCountToday = currentVoteCount == null ? 0 : Integer.parseInt(currentVoteCount);
         if (voteCountToday >= dailyVoteLimit) {
             throw new MyException("今日投票次数已达上限");
         }
 
-        // 2. 获取候选人信息
-        Candidate candidate = candidatesMapper.getByCandidateJwcode(candidateJwcode);
-        if (candidate == null) {
-            throw new MyException("候选人不存在！");
-        }
-
-        // 3. 检查用户是否已经为该候选人投过票
-        List<voter> hasVotes = voterMapper.countVotesToday(voterJwcode);
-        //遍历列表，判断是否有记录
-        for (voter vote : hasVotes) {
-            if (vote.getCandidateJwCode().equals(candidateJwcode)) {
-                throw new MyException("已投票，可以选择其他人试试哦~");
-            }
-        }
-
-        // 4. 增加候选人票数
-        if (!candidatesMapper.addVotes(candidateJwcode)) {
-            throw new MyException ("候选人票数更新失败，请联系管理员！");
-        }
-
-        // 5. 插入投票记录
-        voterMapper.insertVote(voterJwcode, candidateJwcode, voterName);
+        //将redis中的candidates中的投票次数+1
 
-        // 6. 更新 Redis 中的投票次数
-        redisTemplate.opsForValue().increment(redisKey, 1);
-        // 设置 Redis 键的过期时间为当天的23:59:59
-        LocalDateTime now = LocalDateTime.now();
-        LocalDateTime endOfDay = now.toLocalDate().atTime(23, 59, 59);
-        long secondsUntilEndOfDay = Duration.between(now, endOfDay).getSeconds();
-        redisTemplate.expire(redisKey, secondsUntilEndOfDay, TimeUnit.SECONDS);
-        //打印剩余长时间过期
-        System.out.println("Redis键" + redisKey + "将在" + secondsUntilEndOfDay + "秒后过期。");
 
+        //将投票请求发送到 Kafka 消息队列
+        voteProducer.sendVoteMessage(new VoteMessage(voterJwcode,
+                candidateJwcode, voterName,
+                Timestamp.valueOf(LocalDateTime.now()).toString()));
         return 2-voteCountToday;
     }
 
     //获取所有候选人
+    //先查redis中有没有数据，没有就从数据库中查
     @Override
-    public List<Candidate> getCandidates(String VoterJwcode) {
-        //插入投票记录，为List插入是否投过票的状态
-        List<Candidate> candidateList = candidatesMapper.getCandidates();
+    public List<Candidate> getCandidates(String voterJwcode) {
+        // 从 Redis 中获取按投票数排序的候选人 jwCode 列表
+        Set<Object> jwCodes = candidateCacheRepository.getCandidateJwCodesByVotes();
+        //将jwCodes转为字符串类型
+        List<String> jwCodeList = new ArrayList<>();
+        for (Object jwCode : jwCodes) {
+            jwCodeList.add(jwCode.toString());
+        }
+
+        List<Candidate> candidateList = new ArrayList<>();
+        for (String jwCode : jwCodeList) {
+            Candidate candidate = candidateCacheRepository.getCandidate(jwCode);
+            candidateList.add(candidate);
+        }
+
+
+        // 插入投票记录，为 List 插入是否投过票的状态
         for (Candidate candidate : candidateList) {
-            List<voter> voters = voterMapper.countVotesToday(VoterJwcode);
-            for (voter voter : voters) {
+            List<Voter> voters = voterMapper.countVotesToday(voterJwcode);
+            for (Voter voter : voters) {
                 if (voter.getCandidateJwCode().equals(candidate.getJwCode())) {
                     candidate.setVoted(true);
                     break;
                 }
             }
         }
+
         return candidateList;
     }
 
     //获取候选人被投票记录
     @Override
-    public List<voter> getVotesByCandidate(String candidateJwcode) {
-
+    public List<Voter> getVotesByCandidate(String candidateJwcode) {
         return voterMapper.getVotesByCandidate(candidateJwcode);
     }
 }

src/main/resources/application.properties

@@ -16,7 +16,7 @@ mybatis.mapper-locations=classpath:mappers/*xml
 mybatis.type-aliases-package=com.lh.mybatis.entity
 
 # 应用服务 WEB 访问端口
-server.port=8080
+server.port=8091
 
 #Redis 配置
 spring.redis.host=localhost

src/main/resources/com/lh/mapper/VoterMapper.xml

@@ -5,10 +5,10 @@
         INSERT INTO voters(jwcode, candidate_jwcode, name)
         VALUES(#{jwcode}, #{candidateJwcode}, #{name})
     </insert>
-    <select id="countVotesToday" resultType="com.lh.bean.voter">
+    <select id="countVotesToday" resultType="com.lh.bean.Voter">
         SELECT * FROM voters WHERE jwcode = #{jwcode} AND DATE(vote_time) = CURDATE()
     </select>
-    <select id="getVotesByCandidate" resultType="com.lh.bean.voter">
+    <select id="getVotesByCandidate" resultType="com.lh.bean.Voter">
         SELECT * FROM voters WHERE candidate_jwcode = #{candidateJwcode}
     </select>
 </mapper>