SpringBoot整合Redis、mybatis實戰(zhàn)，封裝RedisUtils工具類，redis緩存mybatis數(shù)據(jù) 附源碼
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作者 | 陳彥斌
來源 | urlify.cn/UZFbAf
導(dǎo)讀
Redis不了解的小伙伴，先去腦補下Redis從入門到精通，點我直達。在看下面的東西喲~
創(chuàng)建SpringBoot項目
在線創(chuàng)建方式
網(wǎng)址：https://start.spring.io/
然后創(chuàng)建Controller、Mapper、Service包
SpringBoot整合Redis
引入Redis依賴
<!--SpringBoot與Redis整合依賴-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
完整pom.xml
<?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>2.3.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.cyb</groupId>
<artifactId>chenyb-mobile-redis</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>chenyb-mobile-redis</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-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>io.projectreactor</groupId>
<artifactId>reactor-test</artifactId>
<scope>test</scope>
</dependency>
<!--SpringBoot與Redis整合依賴-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
設(shè)置Redis的Template
RedisConfig.java
package com.cyb.mobile.config;
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.RedisTemplate;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
/**
* @ClassName：RedisConfig
* @Description：Redis配置類
* @Author：chenyb
* @Date：2020/8/16 11:48 下午
* @Versiion：1.0
*/
@Configuration //當(dāng)前類為配置類
public class RedisConfig {
@Bean //redisTemplate注入到Spring容器
public RedisTemplate<String,String> redisTemplate(RedisConnectionFactory factory){
RedisTemplate<String,String> redisTemplate=new RedisTemplate<>();
RedisSerializer<String> redisSerializer = new StringRedisSerializer();
redisTemplate.setConnectionFactory(factory);
//key序列化
redisTemplate.setKeySerializer(redisSerializer);
//value序列化
redisTemplate.setValueSerializer(redisSerializer);
//value hashmap序列化
redisTemplate.setHashKeySerializer(redisSerializer);
//key hashmap序列化
redisTemplate.setHashValueSerializer(redisSerializer);
return redisTemplate;
}
}
設(shè)置Redis連接信息
# 連接的那個數(shù)據(jù)庫
spring.redis.database=0
# redis服務(wù)的ip地址
spring.redis.host=192.168.199.142
# redis端口號
spring.redis.port=6379
# redis的密碼，沒設(shè)置過密碼，可為空
spring.redis.password=12345678
Redis工具類
redisTemplate API
opsForValue ==》String
opsForSet ==》Set
opsForHash ==》hash
opsForZset ==》SortSet
opsForList ==》list隊列
RedisUtils.java
package com.cyb.mobile.utils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.*;
import org.springframework.stereotype.Service;
import java.io.Serializable;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
/**
* @ClassName：RedisUtils
* @Description：Redis工具類
* @Author：chenyb
* @Date：2020/8/17 12:05 上午
* @Versiion：1.0
*/
@Service
public class RedisUtils {
@Autowired
private RedisTemplate redisTemplate;
private static double size = Math.pow(2, 32);
/**
* 寫入緩存
*
* @param key
* @param offset 位 8Bit=1Byte
* @return
*/
public boolean setBit(String key, long offset, boolean isShow) {
boolean result = false;
try {
ValueOperations<Serializable, Object> operations = redisTemplate.opsForValue();
operations.setBit(key, offset, isShow);
result = true;
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
/**
* 寫入緩存
*
* @param key
* @param offset
* @return
*/
public boolean getBit(String key, long offset) {
boolean result = false;
try {
ValueOperations<Serializable, Object> operations = redisTemplate.opsForValue();
result = operations.getBit(key, offset);
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
/**
* 寫入緩存
*
* @param key
* @param value
* @return
*/
public boolean set(final String key, Object value) {
boolean result = false;
try {
ValueOperations<Serializable, Object> operations = redisTemplate.opsForValue();
operations.set(key, value);
result = true;
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
/**
* 寫入緩存設(shè)置時效時間
*
* @param key
* @param value
* @return
*/
public boolean set(final String key, Object value, Long expireTime) {
boolean result = false;
try {
ValueOperations<Serializable, Object> operations = redisTemplate.opsForValue();
operations.set(key, value);
redisTemplate.expire(key, expireTime, TimeUnit.SECONDS);
result = true;
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
/**
* 批量刪除對應(yīng)的value
*
* @param keys
*/
public void remove(final String... keys) {
for (String key : keys) {
remove(key);
}
}
/**
* 刪除對應(yīng)的value
*
* @param key
*/
public void remove(final String key) {
if (exists(key)) {
redisTemplate.delete(key);
}
}
/**
* 判斷緩存中是否有對應(yīng)的value
*
* @param key
* @return
*/
public boolean exists(final String key) {
return redisTemplate.hasKey(key);
}
/**
* 讀取緩存
*
* @param key
* @return
*/
public Object get(final String key) {
Object result = null;
ValueOperations<Serializable, Object> operations = redisTemplate.opsForValue();
result = operations.get(key);
return result;
}
/**
* 哈希 添加
*
* @param key
* @param hashKey
* @param value
*/
public void hmSet(String key, Object hashKey, Object value) {
HashOperations<String, Object, Object> hash = redisTemplate.opsForHash();
hash.put(key, hashKey, value);
}
/**
* 哈希獲取數(shù)據(jù)
*
* @param key
* @param hashKey
* @return
*/
public Object hmGet(String key, Object hashKey) {
HashOperations<String, Object, Object> hash = redisTemplate.opsForHash();
return hash.get(key, hashKey);
}
/**
* 列表添加
*
* @param k
* @param v
*/
public void lPush(String k, Object v) {
ListOperations<String, Object> list = redisTemplate.opsForList();
list.rightPush(k, v);
}
/**
* 列表獲取
*
* @param k
* @param l
* @param l1
* @return
*/
public List<Object> lRange(String k, long l, long l1) {
ListOperations<String, Object> list = redisTemplate.opsForList();
return list.range(k, l, l1);
}
/**
* 集合添加
*
* @param key
* @param value
*/
public void add(String key, Object value) {
SetOperations<String, Object> set = redisTemplate.opsForSet();
set.add(key, value);
}
/**
* 集合獲取
*
* @param key
* @return
*/
public Set<Object> setMembers(String key) {
SetOperations<String, Object> set = redisTemplate.opsForSet();
return set.members(key);
}
/**
* 有序集合添加
*
* @param key
* @param value
* @param scoure
*/
public void zAdd(String key, Object value, double scoure) {
ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
zset.add(key, value, scoure);
}
/**
* 有序集合獲取
*
* @param key
* @param scoure
* @param scoure1
* @return
*/
public Set<Object> rangeByScore(String key, double scoure, double scoure1) {
ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
redisTemplate.opsForValue();
return zset.rangeByScore(key, scoure, scoure1);
}
//第一次加載的時候?qū)?shù)據(jù)加載到redis中
public void saveDataToRedis(String name) {
double index = Math.abs(name.hashCode() % size);
long indexLong = new Double(index).longValue();
boolean availableUsers = setBit("availableUsers", indexLong, true);
}
//第一次加載的時候?qū)?shù)據(jù)加載到redis中
public boolean getDataToRedis(String name) {
double index = Math.abs(name.hashCode() % size);
long indexLong = new Double(index).longValue();
return getBit("availableUsers", indexLong);
}
/**
* 有序集合獲取排名
*
* @param key 集合名稱
* @param value 值
*/
public Long zRank(String key, Object value) {
ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
return zset.rank(key,value);
}
/**
* 有序集合獲取排名
*
* @param key
*/
public Set<ZSetOperations.TypedTuple<Object>> zRankWithScore(String key, long start,long end) {
ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
Set<ZSetOperations.TypedTuple<Object>> ret = zset.rangeWithScores(key,start,end);
return ret;
}
/**
* 有序集合添加
*
* @param key
* @param value
*/
public Double zSetScore(String key, Object value) {
ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
return zset.score(key,value);
}
/**
* 有序集合添加分數(shù)
*
* @param key
* @param value
* @param scoure
*/
public void incrementScore(String key, Object value, double scoure) {
ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
zset.incrementScore(key, value, scoure);
}
/**
* 有序集合獲取排名
*
* @param key
*/
public Set<ZSetOperations.TypedTuple<Object>> reverseZRankWithScore(String key, long start,long end) {
ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
Set<ZSetOperations.TypedTuple<Object>> ret = zset.reverseRangeByScoreWithScores(key,start,end);
return ret;
}
/**
* 有序集合獲取排名
*
* @param key
*/
public Set<ZSetOperations.TypedTuple<Object>> reverseZRankWithRank(String key, long start, long end) {
ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
Set<ZSetOperations.TypedTuple<Object>> ret = zset.reverseRangeWithScores(key, start, end);
return ret;
}
}
控制層
RedisController.java
package com.cyb.mobile.controller;
import com.cyb.mobile.utils.RedisUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* @ClassName：TestController
* @Description：Redis控制器
* @Author：chenyb
* @Date：2020/8/17 12:07 上午
* @Versiion：1.0
*/
@RestController
public class RedisController {
@Autowired
private RedisUtils redisUtils;
@RequestMapping("setAndGet")
public String test(String k,String v){
redisUtils.set(k,v);
return (String) redisUtils.get(k);
}
}
測試
SpringBoot整合Mybatis
添加依賴
<!--mybatis依賴-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.3</version>
</dependency>
<!--mysql驅(qū)動-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<!--druid-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.23</version>
</dependency>
完整pom.xml
<?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>2.3.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.cyb</groupId>
<artifactId>chenyb-mobile-redis</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>chenyb-mobile-redis</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-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>io.projectreactor</groupId>
<artifactId>reactor-test</artifactId>
<scope>test</scope>
</dependency>
<!--SpringBoot與Redis整合依賴-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<!--mybatis依賴-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.3</version>
</dependency>
<!--mysql驅(qū)動-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<!--druid-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.23</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
設(shè)置配置文件
application.properties
# 連接的那個數(shù)據(jù)庫
spring.redis.database=0
# redis服務(wù)的ip地址
spring.redis.host=192.168.199.142
# redis端口號
spring.redis.port=6379
# redis的密碼，沒設(shè)置過密碼，可為空
spring.redis.password=12345678
# 端口號
server.port=8081
# ========================數(shù)據(jù)庫相關(guān)配置=====================
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/nba?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
spring.datasource.username=root
spring.datasource.password=root
# 使用阿里巴巴druid數(shù)據(jù)源，默認使用自帶
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
#開啟控制臺打印sql
mybatis.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl
# mybatis 下劃線轉(zhuǎn)駝峰配置，兩者都可以
# mybatis.configuration.mapUnderscoreToCamelCase=true
mybatis.configuration.map-underscore-to-camel-case=true
# 配置掃描
mybatis.mapper-locations=classpath:mapper/*.xml
# 實體類所在的包別名
mybatis.type-aliases-package=com.cyb.mobile.domain
啟動類上添加掃描路徑
NbaPlayer.java（實體類）
NbaPlayerMapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.cyb.mobile.mapper.NbaPlayerMapper">
<select id="ListNbaPlayer" resultType="NbaPlayer">
SELECT * FROM nba_player
</select>
</mapper>
NbaPlayerMapper.java
NbaPlayerService.java
NbaPlayerServiceImpl.java
控制器(Controller)
測試
redis作為mybatis緩存
用戶第一次訪問的時候獲取數(shù)據(jù)庫的值，再次訪問時直接從緩存中獲取數(shù)據(jù)
設(shè)置緩存過期時間
代碼演示
添加FastJSON依賴
<!--fastjson依賴-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.73</version>
</dependency>
@RequestMapping("test")
public Object test(){
//step1 先從redis中取
String strJson=(String) redisUtils.get("nbaPlayerCache");
if (strJson==null){
System.out.println("從db取值");
// step2如果拿不到則從DB取值
List<NbaPlayer> listNbaPlayer=nbaPlayerService.ListNbaPlayer();
// step3 DB非空情況刷新redis值
if (listNbaPlayer!=null){
redisUtils.set("nbaPlayerCache", JSON.toJSONString(listNbaPlayer));
return listNbaPlayer;
}
return null;
}else
{
System.out.println("從redis緩存取值");
return JSONObject.parseArray(strJson,NbaPlayer.class);
}
}
注意
項目8080是對外端口(向外部暴露的端口)，區(qū)別于內(nèi)部進程號，查內(nèi)部端口用ps -ef|grep port，查外部端口用lsof -i:port
壓測工具
上面我們已經(jīng)SpringBoot整合Redis和Mybatis，但是無法知道具體QPS多少，此時我們可以使用壓測工具來測壓，點我直達
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