springboot系类代码：spring-boot-starter-data-redis-jackson

Redis是一个高级键值存储库。它类似于memcached数据集不是易变的，值可以是字符串，就像memcached一样，还有列表集和有序集。所有这些数据类型都可以操作使用原子操作来推送/弹出元素，添加/删除元素，执行服务器端联合、交集、集合之间的差异等等。Redis支持不同的排序能力。
Spring Data Redis提供了从Spring应用程序轻松配置和访问Redis的功能。它提供了用于与存储交互的低级和高级抽象，使用户不必再关注基础设施。

package com.programb.pos;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

}

package com.programb.pos.config;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.util.JdbcConstants;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

import java.sql.SQLException;


@Component
@ConfigurationProperties(prefix = "spring.datasource")
public class DruidProperties {

    private String url;

    private String username;

    private String password;

    private String driverClassName = "com.mysql.cj.jdbc.Driver";

    private Integer initialSize = 10;

    private Integer minIdle = 3;

    private Integer maxActive = 60;

    private Integer maxWait = 60000;

    private Boolean removeAbandoned = true;

    private Integer removeAbandonedTimeout = 180;

    private Integer timeBetweenEvictionRunsMillis = 60000;

    private Integer minEvictableIdleTimeMillis = 300000;

    private String validationQuery = "SELECT 'x'";

    private Boolean testWhileIdle = true;

    private Boolean testOnBorrow = false;

    private Boolean testOnReturn = false;

    private Boolean poolPreparedStatements = true;

    private Integer maxPoolPreparedStatementPerConnectionSize = 50;

    private String filters = "stat";

    public void config(DruidDataSource dataSource) {
        dataSource.setDbType(JdbcConstants.MYSQL);
        dataSource.setUrl(url);
        dataSource.setUsername(username);
        dataSource.setPassword(password);
        dataSource.setDriverClassName(driverClassName);
        dataSource.setInitialSize(initialSize);     // 定义初始连接数
        dataSource.setMinIdle(minIdle);             // 最小空闲
        dataSource.setMaxActive(maxActive);         // 定义最大连接数
        dataSource.setMaxWait(maxWait);             // 获取连接等待超时的时间
        dataSource.setRemoveAbandoned(removeAbandoned); // 超过时间限制是否回收
        dataSource.setRemoveAbandonedTimeout(removeAbandonedTimeout); // 超过时间限制多长

        // 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
        dataSource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
        // 配置一个连接在池中最小生存的时间，单位是毫秒
        dataSource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
        // 用来检测连接是否有效的sql，要求是一个查询语句
        dataSource.setValidationQuery(validationQuery);
        // 申请连接的时候检测
        dataSource.setTestWhileIdle(testWhileIdle);
        // 申请连接时执行validationQuery检测连接是否有效，配置为true会降低性能
        dataSource.setTestOnBorrow(testOnBorrow);
        // 归还连接时执行validationQuery检测连接是否有效，配置为true会降低性能
        dataSource.setTestOnReturn(testOnReturn);
        // 打开PSCache，并且指定每个连接上PSCache的大小
        dataSource.setPoolPreparedStatements(poolPreparedStatements);
        dataSource.setMaxPoolPreparedStatementPerConnectionSize(maxPoolPreparedStatementPerConnectionSize);
        // 属性类型是字符串，通过别名的方式配置扩展插件，常用的插件有：
        // 监控统计用的filter:stat
        // 日志用的filter:log4j
        // 防御SQL注入的filter:wall
        try {
            dataSource.setFilters(filters);
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getDriverClassName() {
        return driverClassName;
    }

    public void setDriverClassName(String driverClassName) {
        this.driverClassName = driverClassName;
    }

    public Integer getInitialSize() {
        return initialSize;
    }

    public void setInitialSize(Integer initialSize) {
        this.initialSize = initialSize;
    }

    public Integer getMinIdle() {
        return minIdle;
    }

    public void setMinIdle(Integer minIdle) {
        this.minIdle = minIdle;
    }

    public Integer getMaxActive() {
        return maxActive;
    }

    public void setMaxActive(Integer maxActive) {
        this.maxActive = maxActive;
    }

    public Integer getMaxWait() {
        return maxWait;
    }

    public void setMaxWait(Integer maxWait) {
        this.maxWait = maxWait;
    }

    public Integer getTimeBetweenEvictionRunsMillis() {
        return timeBetweenEvictionRunsMillis;
    }

    public void setTimeBetweenEvictionRunsMillis(Integer timeBetweenEvictionRunsMillis) {
        this.timeBetweenEvictionRunsMillis = timeBetweenEvictionRunsMillis;
    }

    public Integer getMinEvictableIdleTimeMillis() {
        return minEvictableIdleTimeMillis;
    }

    public void setMinEvictableIdleTimeMillis(Integer minEvictableIdleTimeMillis) {
        this.minEvictableIdleTimeMillis = minEvictableIdleTimeMillis;
    }

    public String getValidationQuery() {
        return validationQuery;
    }

    public void setValidationQuery(String validationQuery) {
        this.validationQuery = validationQuery;
    }

    public Boolean getTestWhileIdle() {
        return testWhileIdle;
    }

    public void setTestWhileIdle(Boolean testWhileIdle) {
        this.testWhileIdle = testWhileIdle;
    }

    public Boolean getTestOnBorrow() {
        return testOnBorrow;
    }

    public void setTestOnBorrow(Boolean testOnBorrow) {
        this.testOnBorrow = testOnBorrow;
    }

    public Boolean getTestOnReturn() {
        return testOnReturn;
    }

    public void setTestOnReturn(Boolean testOnReturn) {
        this.testOnReturn = testOnReturn;
    }

    public Boolean getPoolPreparedStatements() {
        return poolPreparedStatements;
    }

    public void setPoolPreparedStatements(Boolean poolPreparedStatements) {
        this.poolPreparedStatements = poolPreparedStatements;
    }

    public Integer getMaxPoolPreparedStatementPerConnectionSize() {
        return maxPoolPreparedStatementPerConnectionSize;
    }

    public void setMaxPoolPreparedStatementPerConnectionSize(Integer maxPoolPreparedStatementPerConnectionSize) {
        this.maxPoolPreparedStatementPerConnectionSize = maxPoolPreparedStatementPerConnectionSize;
    }

    public String getFilters() {
        return filters;
    }

    public void setFilters(String filters) {
        this.filters = filters;
    }

    public Boolean getRemoveAbandoned() {
        return removeAbandoned;
    }

    public void setRemoveAbandoned(Boolean removeAbandoned) {
        this.removeAbandoned = removeAbandoned;
    }

    public Integer getRemoveAbandonedTimeout() {
        return removeAbandonedTimeout;
    }

    public void setRemoveAbandonedTimeout(Integer removeAbandonedTimeout) {
        this.removeAbandonedTimeout = removeAbandonedTimeout;
    }
}

package com.programb.pos.config;

import com.alibaba.druid.pool.DruidDataSource;
import com.baomidou.mybatisplus.plugins.PaginationInterceptor;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import javax.annotation.Resource;

@Configuration
@EnableTransactionManagement(order = 2)
@MapperScan(basePackages = {"com.programb.pos.dao.repository"})
public class MybatisPlusConfig {

    @Resource
    private DruidProperties druidProperties;


    @Bean
    public DruidDataSource singleDatasource() {
        DruidDataSource dataSource = new DruidDataSource();
        druidProperties.config(dataSource);
        return dataSource;
    }


    @Bean
    public PaginationInterceptor paginationInterceptor() {
        return new PaginationInterceptor();
    }
}

package com.programb.pos.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
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.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;


@Configuration
public class RedisConfig {

    @Bean
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(redisConnectionFactory);

        // 使用Jackson2JsonRedisSerialize 替换默认序列化
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);

        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);

        jackson2JsonRedisSerializer.setObjectMapper(objectMapper);

        // 设置value的序列化规则和 key的序列化规则
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }
}

package com.programb.pos.dao.entity;

import com.baomidou.mybatisplus.activerecord.Model;
import com.baomidou.mybatisplus.annotations.TableId;
import com.baomidou.mybatisplus.annotations.TableName;
import com.baomidou.mybatisplus.enums.IdType;

import java.io.Serializable;

@TableName(value = "t_user")
public class User extends Model<User> {

    @TableId(value="id", type= IdType.INPUT)
    private Integer id;

    private String username;

    private String password;

    public User() {
    }

    public User(Integer id, String username, String password) {
        this.id = id;
        this.username = username;
        this.password = password;
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    protected Serializable pkVal() {
        return this.id;
    }
}

package com.programb.pos.dao.repository;

import com.baomidou.mybatisplus.mapper.BaseMapper;
import com.programb.pos.dao.entity.User;

public interface UserMapper extends BaseMapper<User> {
}

package com.programb.pos.service;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.programb.pos.dao.entity.User;
import com.programb.pos.dao.repository.UserMapper;

import javax.annotation.Resource;
import java.util.concurrent.TimeUnit;

@Service
@Transactional
public class UserService {
    private Logger logger = LoggerFactory.getLogger(this.getClass());
    @Resource
    private UserMapper userMapper;

    @Resource
    private RedisTemplate<String, User> redisTemplate;

    public void createUser(User user) {
        logger.info("创建用户start...");
        userMapper.insert(user);
    }

    public User getById(int id) {
        logger.info("获取用户start...");
        // 从缓存中获取用户信息
        String key = "user_" + id;
        ValueOperations<String, User> operations = redisTemplate.opsForValue();

        // 缓存存在
        boolean hasKey = redisTemplate.hasKey(key);
        if (hasKey) {
            User user = operations.get(key);
            logger.info("从缓存中获取了用户 id = " + id);
            return user;
        }

        // 缓存不存在，从 DB 中获取
        User user = userMapper.selectById(id);
        // 插入缓存
        operations.set(key, user, 10, TimeUnit.SECONDS);

        return user;
    }


    public void updateUser(User user) {
        logger.info("更新用户start...");
        userMapper.updateById(user);
        int userId = user.getId();
        // 缓存存在，删除缓存
        String key = "user_" + userId;
        boolean hasKey = redisTemplate.hasKey(key);
        if (hasKey) {
            redisTemplate.delete(key);
            logger.info("更新用户时候，从缓存中删除用户 >> " + userId);
        }
    }


    public void deleteById(int id) {
        logger.info("删除用户start...");
        userMapper.deleteById(id);

        // 缓存存在，删除缓存
        String key = "user_" + id;
        boolean hasKey = redisTemplate.hasKey(key);
        if (hasKey) {
            redisTemplate.delete(key);
            logger.info("更新用户时候，从缓存中删除用户 >> " + id);
        }
    }

}

spring:
  profiles:
    active: dev
  datasource:
    url: jdbc:mysql://127.0.0.1:3306/test?serverTimezone=UTC&useSSL=false&autoReconnect=true&tinyInt1isBit=false&useUnicode=true&characterEncoding=utf8
    username: root
    password: 123456


mybatis-plus:
  mapper-locations: classpath*:com/programb/pos/dao/repository/mapping/*.xml
  typeAliasesPackage: >
    com.xncoding.pos.dao.entity
  global-config:
    id-type: 0  # 0:数据库ID自增   1:用户输入id  2:全局唯一id(IdWorker)  3:全局唯一ID(uuid)
    db-column-underline: false
    refresh-mapper: true
  configuration:
    map-underscore-to-camel-case: true
    cache-enabled: true #配置的缓存的全局开关
    lazyLoadingEnabled: true #延时加载的开关
    multipleResultSetsEnabled: true #开启的话，延时加载一个属性时会加载该对象全部属性，否则按需加载属性

logging:
  level:
    org.springframework.web.servlet: ERROR


spring:
  profiles: dev
  redis:
    host: 127.0.0.1
    port: 6379
    database: 0
    lettuce:
      shutdown-timeout: 200ms
      pool:
        max-active: 7
        max-idle: 7
        min-idle: 2
        max-wait: -1ms

logging:
  level:
    ROOT: INFO
    com:
      xncoding: DEBUG
  file: D:/programb/logs/app.log

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.programb</groupId>
    <artifactId>springboot-redis</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>springboot-redis</name>
    <description>SpringBoot Redis</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.4.RELEASE</version>
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <jackson-databind-version>2.9.4</jackson-databind-version>
		<druid.version>1.1.2</druid.version>
        <mysql-connector.version>8.0.7-dmr</mysql-connector.version>
        <mybatis-plus.version>2.1.8</mybatis-plus.version>
        <mybatisplus-spring-boot-starter.version>1.0.5</mybatisplus-spring-boot-starter.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-pool2</artifactId>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>${jackson-databind-version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>${jackson-databind-version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>${jackson-databind-version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>com.vaadin.external.google</groupId>
                    <artifactId>android-json</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
		<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql-connector.version}</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>${druid.version}</version>
        </dependency>
        <!-- MyBatis plus增强和springboot的集成-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus</artifactId>
            <version>${mybatis-plus.version}</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatisplus-spring-boot-starter</artifactId>
            <version>${mybatisplus-spring-boot-starter.version}</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.6.1</version>
                <configuration>
             
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.20</version>
                <configuration>
                    <skip>true</skip>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <executions>
                </executions>
            </plugin>
        </plugins>

        <resources>
            <resource>
                <directory>src/main/resources</directory>
            </resource>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml