一.創建SpringBoot工程

1.導入jar包

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.3.4.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.example</groupId><artifactId>esee_starts</artifactId><version>0.0.1-SNAPSHOT</version><name>esee_starts</name><description>Demo project for Spring Boot</description><properties><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-redis</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.kafka</groupId><artifactId>spring-kafka</artifactId></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>org.springframework.kafka</groupId><artifactId>spring-kafka-test</artifactId><scope>test</scope></dependency><!-- https://mvnrepository.com/artifact/redis.clients/jedis --><dependency><groupId>redis.clients</groupId><artifactId>jedis</artifactId><version>3.2.0</version></dependency><!-- https://mvnrepository.com/artifact/com.alibaba/fastjson --><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.75</version></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><configuration><excludes><exclude><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></exclude></excludes></configuration></plugin></plugins></build></project>

2.配置yaml

spring:redis:host: 192.168.0.106port: 6379jedis:pool:max-active: 8max-wait: -1max-idle: 500min-idle: 0lettuce:shutdown-timeout: 0

3.設置RedisTemplate的序列化

package com.example.esee_starts.redisConfig;import com.alibaba.fastjson.support.spring.FastJsonRedisSerializer; import org.springframework.boot.autoconfigure.condition.ConditionalOnClass; import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean; import org.springframework.boot.autoconfigure.data.redis.RedisProperties; import org.springframework.boot.context.properties.EnableConfigurationProperties; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.data.redis.connection.RedisConnectionFactory; import org.springframework.data.redis.core.RedisOperations; import org.springframework.data.redis.core.RedisTemplate; import org.springframework.data.redis.core.StringRedisTemplate; import org.springframework.data.redis.serializer.StringRedisSerializer;import java.net.UnknownHostException;@Configuration @ConditionalOnClass(RedisOperations.class) @EnableConfigurationProperties(RedisProperties.class)public class redisConfig {@Bean@ConditionalOnMissingBean(name = {"redisTemplate"})public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) throws UnknownHostException {RedisTemplate<Object, Object> template = new RedisTemplate();// 使用Fastjson序列化FastJsonRedisSerializer fastJsonRedisSerializer = new FastJsonRedisSerializer(Object.class);// value值得序列化采用FastJsonRedisSerializertemplate.setValueSerializer(fastJsonRedisSerializer);template.setHashValueSerializer(fastJsonRedisSerializer);// key值的序列化采用StringRedisSerializertemplate.setKeySerializer(new StringRedisSerializer());template.setHashKeySerializer(new StringRedisSerializer());template.setConnectionFactory(redisConnectionFactory);return template;}@Bean@ConditionalOnMissingBean(StringRedisTemplate.class)public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory redisConnectionFactory){StringRedisTemplate template = new StringRedisTemplate();template.setConnectionFactory(redisConnectionFactory);return template;} }

4. 編輯工具類RedisUtil

package com.example.esee_starts.redisUtile;import org.springframework.data.redis.core.RedisTemplate; import org.springframework.stereotype.Component; import org.springframework.util.CollectionUtils;import javax.annotation.Resource; import java.util.Set; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.concurrent.TimeUnit;@Component public class RedisUtil {@Resourceprivate RedisTemplate<String,Object> redisTemplate;public Set<String> keys(String keys) {try {return redisTemplate.keys(keys);}catch (Exception e){e.printStackTrace();return null;}}/*** 指定緩存失效的時間* @param key 鍵* @param time 時間戳(秒)* @return true設置成功 false設置不成功*/public boolean expire(String key,long time){try {if (time > 0){redisTemplate.expire(key,time, TimeUnit.SECONDS);}return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 判斷key是否存在* @param key 鍵* @return true存在 false不存在*/public boolean hasKey(String key){try {return redisTemplate.hasKey(key);} catch (Exception e) {e.printStackTrace();return false;}}/*** 刪除緩存* @param key*/@SuppressWarnings("unchecked")public void del(String... key){if (key != null && key.length > 0 ){if (key.length == 1){redisTemplate.delete(key[0]);}else {redisTemplate.delete(CollectionUtils.arrayToList(key));}}}/*** 普通緩存獲取* @param key 鍵* @return 值*/public Object get(String key) {return key == null ? null : redisTemplate.opsForValue().get(key);}/*** 普通緩存放入* @param key 鍵* @param value 值* @return true成功 false失敗*/public boolean set(String key, Object value) {try {redisTemplate.opsForValue().set(key, value);return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 普通緩存放入, 不存在放入，存在返回* @param key 鍵* @param value 值* @return true成功 false失敗*/public boolean setnx(String key, Object value) {try {redisTemplate.opsForValue().setIfAbsent(key,value);return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 普通緩存放入并設置時間* @param key 鍵* @param value 值* @param time 時間(秒) time要大于0 如果time小于等于0 將設置無限期* @return true成功 false 失敗*/public boolean set(String key, Object value, long time) {try {if (time > 0) {redisTemplate.opsForValue().set(key, value, time, TimeUnit.SECONDS);} else {set(key, value);}return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 普通緩存放入并設置時間,不存在放入，存在返回* @param key 鍵* @param value 值* @param time 時間(秒) time要大于0 如果time小于等于0 將設置無限期* @return true成功 false 失敗*/public boolean setnx(String key, Object value, long time) {try {if (time > 0) {redisTemplate.opsForValue().setIfAbsent(key, value, time, TimeUnit.SECONDS);} else {set(key, value);}return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 遞增* @param key 鍵* @param delta 要增加幾(大于0)* @return*/public long incr(String key, long delta) {if (delta < 0) {throw new RuntimeException("遞增因子必須大于0");}return redisTemplate.opsForValue().increment(key, delta);}/*** 遞減* @param key 鍵* @param delta 要減少幾(小于0)* @return*/public long decr(String key, long delta) {if (delta < 0) {throw new RuntimeException("遞減因子必須大于0");}return redisTemplate.opsForValue().increment(key, -delta);}/*** HashGet* @param key 鍵 不能為null* @param item 項 不能為null* @return 值*/public Object hget(String key, String item) {return redisTemplate.opsForHash().get(key, item);}/*** 獲取hashKey對應的所有鍵值* @param key 鍵* @return 對應的多個鍵值*/public Map<Object, Object> hmget(String key) {return redisTemplate.opsForHash().entries(key);}/*** HashSet* @param key 鍵* @param map 對應多個鍵值* @return true 成功 false 失敗*/public boolean hmset(String key, Map<String, Object> map) {try {redisTemplate.opsForHash().putAll(key, map);return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** HashSet 并設置時間* @param key 鍵* @param map 對應多個鍵值* @param time 時間(秒)* @return true成功 false失敗*/public boolean hmset(String key, Map<String, Object> map, long time) {try {redisTemplate.opsForHash().putAll(key, map);if (time > 0) {expire(key, time);}return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 向一張hash表中放入數據,如果不存在將創建* @param key 鍵* @param item 項* @param value 值* @return true 成功 false失敗*/public boolean hset(String key, String item, Object value) {try {redisTemplate.opsForHash().put(key, item, value);return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 向一張hash表中放入數據,如果不存在將創建* @param key 鍵* @param item 項* @param value 值* @param time 時間(秒) 注意:如果已存在的hash表有時間,這里將會替換原有的時間* @return true 成功 false失敗*/public boolean hset(String key, String item, Object value, long time) {try {redisTemplate.opsForHash().put(key, item, value);if (time > 0) {expire(key, time);}return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 刪除hash表中的值* @param key 鍵 不能為null* @param item 項 可以使多個 不能為null*/public void hdel(String key, Object... item) {redisTemplate.opsForHash().delete(key, item);}/*** 判斷hash表中是否有該項的值* @param key 鍵 不能為null* @param item 項 不能為null* @return true 存在 false不存在*/public boolean hHasKey(String key, String item) {return redisTemplate.opsForHash().hasKey(key, item);}/*** hash遞增 如果不存在,就會創建一個 并把新增后的值返回* @param key 鍵* @param item 項* @param by 要增加幾(大于0)* @return*/public double hincr(String key, String item, double by) {return redisTemplate.opsForHash().increment(key, item, by);}/*** hash遞減* @param key 鍵* @param item 項* @param by 要減少記(小于0)* @return*/public double hdecr(String key, String item, double by) {return redisTemplate.opsForHash().increment(key, item, -by);}/*** 根據key獲取Set中的所有值* @param key 鍵* @return*/public Set<Object> sGet(String key) {try {return redisTemplate.opsForSet().members(key);} catch (Exception e) {e.printStackTrace();return null;}}/*** 根據value從一個set中查詢,是否存在* @param key 鍵* @param value 值* @return true 存在 false不存在*/public boolean sHasKey(String key, Object value) {try {return redisTemplate.opsForSet().isMember(key, value);} catch (Exception e) {e.printStackTrace();return false;}}/*** 將數據放入set緩存* @param key 鍵* @param values 值 可以是多個* @return 成功個數*/public long sSet(String key, Object... values) {try {return redisTemplate.opsForSet().add(key, values);} catch (Exception e) {e.printStackTrace();return 0;}}/*** 將set數據放入緩存* @param key 鍵* @param time 時間(秒)* @param values 值 可以是多個* @return 成功個數*/public long sSetAndTime(String key, long time, Object... values) {try {Long count = redisTemplate.opsForSet().add(key, values);if (time > 0)expire(key, time);return count;} catch (Exception e) {e.printStackTrace();return 0;}}/*** 獲取set緩存的長度* @param key 鍵* @return*/public long sGetSetSize(String key) {try {return redisTemplate.opsForSet().size(key);} catch (Exception e) {e.printStackTrace();return 0;}}/*** 移除值為value的* @param key 鍵* @param values 值 可以是多個* @return 移除的個數*/public long setRemove(String key, Object... values) {try {Long count = redisTemplate.opsForSet().remove(key, values);return count;} catch (Exception e) {e.printStackTrace();return 0;}}// ===============================list=================================/*** 獲取list緩存的內容* @param key 鍵* @param start 開始* @param end 結束 0 到 -1代表所有值* @return*/public List<Object> lGet(String key, long start, long end) {try {return redisTemplate.opsForList().range(key, start, end);} catch (Exception e) {e.printStackTrace();return null;}}/*** 獲取list緩存的長度* @param key 鍵* @return*/public long lGetListSize(String key) {try {return redisTemplate.opsForList().size(key);} catch (Exception e) {e.printStackTrace();return 0;}}/*** 通過索引 獲取list中的值* @param key 鍵* @param index 索引 index>=0時， 0 表頭，1 第二個元素，依次類推；index<0時，-1，表尾，-2倒數第二個元素，依次類推* @return*/public Object lGetIndex(String key, long index) {try {return redisTemplate.opsForList().index(key, index);} catch (Exception e) {e.printStackTrace();return null;}}/*** 將list放入緩存* @param key 鍵* @param value 值* @return*/public boolean lSet(String key, Object value) {try {redisTemplate.opsForList().rightPush(key, value);return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 將list放入緩存* @param key 鍵* @param value 值* @param time 時間(秒)* @return*/public boolean lSet(String key, Object value, long time) {try {redisTemplate.opsForList().rightPush(key, value);if (time > 0)expire(key, time);return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 將list放入緩存* @param key 鍵* @param value 值* @return*/public boolean lSet(String key, List<Object> value) {try {redisTemplate.opsForList().rightPushAll(key, value);return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 將list放入緩存** @param key 鍵* @param value 值* @param time 時間(秒)* @return*/public boolean lSet(String key, List<Object> value, long time) {try {redisTemplate.opsForList().rightPushAll(key, value);if (time > 0)expire(key, time);return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 根據索引修改list中的某條數據* @param key 鍵* @param index 索引* @param value 值* @return*/public boolean lUpdateIndex(String key, long index, Object value) {try {redisTemplate.opsForList().set(key, index, value);return true;} catch (Exception e) {e.printStackTrace();return false;}}/*** 移除N個值為value* @param key 鍵* @param count 移除多少個* @param value 值* @return 移除的個數*/public long lRemove(String key, long count, Object value) {try {Long remove = redisTemplate.opsForList().remove(key, count, value);return remove;} catch (Exception e) {e.printStackTrace();return 0;}} }

5.編寫pojo

package com.example.esee_starts.redisBean;import lombok.Data;import java.io.Serializable;@Data public class Days implements Serializable {private String openId;private String daysId;private String title;private int itemNumber;private String date;}

6.web調用

package com.example.esee_starts.redisUtile;import com.example.esee_starts.redisBean.Days; import com.example.esee_starts.redisUtile.RedisUtil; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.redis.core.RedisTemplate; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController;import javax.annotation.Generated; import javax.xml.transform.Result;@RestController @RequestMapping("/as") public class TestController {@Autowired(required = false)private RedisUtil redisUtil;private Days d;@RequestMapping("/add")public String add(){return "/add";}@GetMapping("/redis")public String before(){d = new Days();d.setDate("123");d.setDaysId("456");d.setItemNumber(123);d.setOpenId("dawda");d.setTitle("title");redisUtil.set("r","aaaaaa");return redisUtil.get("r").toString();} }

二,整合kafka

創建同步發送消息

@RequestMapping("send/sync/{message}")public String send(@PathVariable String message) {// 同步發送消息final ListenableFuture<SendResult<Integer, String>> future = kafkaTemplate.send("frist", 0, 0, message);try {final SendResult<Integer, String> sendResult = future.get();final RecordMetadata metadata = sendResult.getRecordMetadata();System.out.println(metadata.topic()+"\t"+metadata.partition()+"\t"+metadata.offset());} catch (InterruptedException e) {e.printStackTrace();} catch (ExecutionException e) {e.printStackTrace();}return "success";}

創建異步發送消息

package com.example.esee_starts.controller;import org.apache.kafka.clients.producer.ProducerRecord; import org.apache.kafka.clients.producer.RecordMetadata; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.kafka.core.KafkaTemplate; import org.springframework.kafka.support.SendResult; import org.springframework.util.concurrent.ListenableFuture; import org.springframework.util.concurrent.ListenableFutureCallback; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController;// kafka異步發送消息 @RestController public class KafkaAsyncProducerController {@Autowired(required = false)private KafkaTemplate kafkaTemplate;@RequestMapping("send/async/{message}")public String send(@PathVariable String message){// 設置回調函數,異步等待broker端的返回結果final ListenableFuture future = this.kafkaTemplate.send("frist", 0, 1, message);future.addCallback(new ListenableFutureCallback<SendResult<Integer,String>>() {@Overridepublic void onSuccess(SendResult<Integer,String> result) {final RecordMetadata metadata = result.getRecordMetadata();System.out.println("發送消息成功: " + metadata.topic() + "\t"+ metadata.partition() + "\t"+ +metadata.offset());}@Overridepublic void onFailure(Throwable throwable) {System.out.println("發送消息失敗: "+ throwable.getMessage());}});return "success";}}

創建消費者

package com.example.esee_starts.kafka;import lombok.extern.slf4j.Slf4j; import org.apache.kafka.clients.consumer.ConsumerRecord; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.kafka.annotation.KafkaListener; import org.springframework.kafka.support.KafkaHeaders; import org.springframework.messaging.handler.annotation.Header; import org.springframework.stereotype.Component;import java.util.Optional;@Component @Slf4j public class KafkaConsumer {private static final Logger logger = LoggerFactory.getLogger(KafkaConsumer.class);@KafkaListener(topics = {"frist"})public void onMessage(ConsumerRecord<?, ?> record) {String topic = record.topic();int partition = record.partition();long offset = record.offset();Object key = record.key();Object value = record.value();System.out.println("topic: " + topic);System.out.println("partition: " + partition);System.out.println("offset: " + offset);System.out.println("key: " + key);System.out.println("value: " + value);} }

4創建配置類

package com.example.esee_starts.redisConfig;import org.apache.kafka.clients.admin.NewTopic; import org.apache.kafka.clients.producer.ProducerConfig; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.kafka.core.KafkaAdmin; import org.springframework.kafka.core.KafkaTemplate; import org.springframework.kafka.core.ProducerFactory;import java.util.HashMap; import java.util.Map;@Configuration public class KafkaConfig {@Beanpublic NewTopic topic1(){// 三個參數: topic名稱, 分區數, 副本return new NewTopic("topic-01",3,(short) 1);}@Beanpublic NewTopic topic2(){// 三個參數: topic名稱, 分區數, 副本return new NewTopic("topic-02",5,(short) 3);}// 重寫kafkaAdmin方法,將會替代原有的注入的kafkaAdmin方法@Beanpublic KafkaAdmin kafkaAdmin(){Map<String,Object> configs = new HashMap<>();configs.put("bootstrap.servers","192.168.0.102:9092");KafkaAdmin admin = new KafkaAdmin(configs);return admin;}// 重寫kafkaAdmin方法,將會替代原有的注入的KafkaTemplate方法@Bean@Autowiredpublic KafkaTemplate<Integer,String> kafkaTemplate(ProducerFactory<Integer,String> producerFactory){// 覆蓋原有設置Map<String,Object> configs = new HashMap<>();configs.put(ProducerConfig.BATCH_SIZE_CONFIG,200);KafkaTemplate kafkaTemplate = new KafkaTemplate<Integer,String>(producerFactory,configs);return kafkaTemplate;} }

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