SpringBoot整合Mybatis、druid、Redis

1、 大体流程

个人开发机安装redis并启动，https://www.cnblogs.com/codersay/p/4301677.html

编写bean以Bomcdata表为例，编写mapper接口以及对应的xml文件，编写service层，编写controller层，配置文件整合druid，整合redis：

2、 实现步骤

（0）pom文件 yml文件

<?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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.19.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.ke</groupId>
    <artifactId>springboot-mybatis-druid-redis</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springboot-mybatis-druid-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-cache</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.3</version>
        </dependency>

        <!-- 引入redis -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.8</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

spring:
  datasource:
    username: root
    password: 123456
    url: jdbc:mysql://10.30.128.219:3306/alliance_division
    driver-class-name: com.mysql.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource #若不加上type将会默认使用tomcat数据源

#   数据源其他配置
    initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true
#   配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
    filters: stat,wall,log4j
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500
  redis:
    host: 10.26.28.125

mybatis:
  config-location: classpath:mybatis/mybatis-config.xml
  mapper-locations: classpath:mybatis/mapper/*.xml

debug: true

（1）编写bean以Bomcdata表为例

import java.io.Serializable;
import java.sql.Timestamp;

public class Bomcdata implements Serializable {

    private String id;
    private String name;
    private Integer idKey;
    private Timestamp dateTimeDate;

    public String getId() {
        return id;
    }

    public String getName() {
        return name;
    }

    public Integer getIdKey() {
        return idKey;
    }

    public Timestamp getDateTimeDate() {
        return dateTimeDate;
    }

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

    public void setName(String name) {
        this.name = name;
    }

    public void setIdKey(Integer idKey) {
        this.idKey = idKey;
    }

    public void setDateTimeDate(Timestamp dateTimeDate) {
        this.dateTimeDate = dateTimeDate;
    }
}

（2）编写mapper接口以及对应的xml文件 以及mybatis-config.xml

import com.ke.springbootmybatisdruidredis.bean.Bomcdata ;
import org.apache.ibatis.annotations.Mapper;

@Mapper
public interface BomcdataMapper {

    //@Select("SELECT * FROM bomcdata WHERE id = #{id}")
    public Bomcdata getDataById(String id);
}

<?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.ke.springbootmybatisdruidredis.mapper.BomcdataMapper">

   <!--public Bomcdata getDataById(String id);-->
    <select id="getDataById" resultType="com.ke.springbootmybatisdruidredis.bean.Bomcdata">
          SELECT * FROM bomcdata WHERE id = #{id}
    </select>

</mapper>

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>

    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>
</configuration>

（3）编写service层

import com.ke.springbootmybatisdruidredis.bean.Bomcdata ;
import com.ke.springbootmybatisdruidredis.mapper.BomcdataMapper ;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;

@Service
public class BomcdataService {

    @Autowired
    BomcdataMapper bomcdataMapper;

    @Cacheable(cacheNames = {"emp"})
    public Bomcdata getBomc(String id){
        System.out.println("search"+id+"bomcdata");
        Bomcdata bomc = bomcdataMapper.getDataById(id);
        return bomc;
    }

}

（4）编写controller层

import com.ke.springbootmybatisdruidredis.bean.Bomcdata ;
import com.ke.springbootmybatisdruidredis.service.BomcdataService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

@RestController//返回json数据
public class DataController {

    @Autowired
    BomcdataService bomcdataService;

    @GetMapping("/data/{id}")
    public Bomcdata getBomcdata(@PathVariable("id") String id){
        return bomcdataService.getBomc(id);
    }
}

（5）config文件中添加druid数据源配置类，并根据所设置的 url 以及用户名密码登陆即可

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

@Configuration
public class DruidConfig {//数据源配置类


    @Bean
    //自己加载数据源并使得spring.datasource中的所有属性配置都生效
    @ConfigurationProperties(prefix = "spring.datasource")
    public DataSource druid(){
        return new DruidDataSource();
    }


    //配置druid监控
    //1 配置一个管理后台的servlet
    @Bean
    public ServletRegistrationBean statViewServlet(){
        ServletRegistrationBean bean = new ServletRegistrationBean(new StatViewServlet(),"/druid/*");
        Map<String, String> initPatams = new HashMap<>();

        initPatams.put("loginUsername","admin");
        initPatams.put("loginPassword","123456");
        initPatams.put("allow","");
        initPatams.put("deny","192.168.0.1");

        bean.setInitParameters(initPatams);
        return  bean;
    }

    //2 配置一个web监控的filter
    @Bean
    public FilterRegistrationBean webStatFilter(){
        FilterRegistrationBean bean = new FilterRegistrationBean();
        bean.setFilter(new WebStatFilter());
        Map<String,String> initParams = new HashMap<>();
        initParams.put("exclusions","*.js,*.css,/druid/*");

        bean.setInitParameters(initParams);
        bean.setUrlPatterns(Arrays.asList("/*"));
        return bean;
    }
}

（6）运行测试：只有第一次发送浏览器请求调用了数据库，剩下几次直接从redis缓存中取数据。

3、总结

数据库中的对象信息默认使用jdk序列化将序列化后的乱码数据保存到redis 我想使用RedisTemplate的默认序列化规则自己编写MyRedisConfig.java配置RedisTemplate总是报错。