目录

一.SpringBoot整合Mybatis与Mybatis-Plus

二.SpringBoot切换druid数据源

3.1DRUID配置参数

3.2Druid监控平台

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一.SpringBoot整合Mybatis与Mybatis-Plus

步骤：

        1.坐标

         <dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus</artifactId><version>3.1.1</version></dependency>

        注意：mp坐标添加后，mybatis坐标移除(mp坐标包含mybatis)

        2.配置数据源以及mp

先导入德鲁伊数据源

        <!--druid坐标--><dependency><groupId>com.alibaba</groupId><artifactId>druid-spring-boot-starter</artifactId><version>1.2.8</version></dependency>

#数据源
spring:datasource:url: jdbc:mysql://localhost:3306/库?serverTimezone=GMTusername: rootpassword: 密码driver-class-name: com.mysql.cj.jdbc.Drivertype: com.alibaba.druid.pool.DruidDataSourcefilters: stat,wallmybatis:configuration:map-underscore-to-camel-case: true   #自动驼峰映射type-aliases-package: com.apesource.pojo  #起别名mybatis-plus:configuration:map-underscore-to-camel-case: true #自动驼峰映射(默认开启)log-impl: org.apache.ibatis.logging.stdout.StdOutImpl #日志

         3.编写注解配置实体类与关系表映射关系(truncate清空表以及主键)

        @TableName(value = "关联表名称")=========================》修饰在类

        @TableField(value = "关联字段名称")======================》修饰在属性 ​

                exist = "忽略字段"

        @TableLogic(value=“原值”,delval=“修改值”)

        注解参数

        value = “” 未删除的值，默认值为0

        delval = “” 删除后的值，默认值为1

        @TableId(type="指定主键生成策略，默认雪花算法")=============》修饰在属性

         AUTO(0), ​ NONE(1), ​ INPUT(2), ​ ASSIGN_ID(3), ​ ASSIGN_UUID(4);

@NoArgsConstructor//表示无参构造
@AllArgsConstructor//全参构造
@Data//所有属性setget方法以及toString()
@TableName("t_student")
public class Student {@TableId(value = "stu_id",type = IdType.AUTO)private int stuId;@TableField(value = "stu_name")private String stuName;@TableField(value = "stu_nick")private String stuNick;@TableField(value = "stu_hobby")private String stuHobby;@TableLogic(value = "0",delval = "1")private int isdeleted;@TableField(exist = false)private MultipartFile mpf;public Student(String stuName, String stuNick, String stuHobby) {this.stuName = stuName;this.stuNick = stuNick;this.stuHobby = stuHobby;}
}

        4.使用

注入mapper:

@Mapper=====>注册+注入        						   作用：在mapper类上
@MapperScan(value = "mapper所在的包")=>批量注册+注入     作用：在启动类上	

BaseMapper===========》公共的数据访问层

@Mapper
public interface HotelMapper extends BaseMapper<Hotel> {
}

IService/ServiceImp==》公共的业务层

public interface IHotelService extends IService<Hotel> {
}

@Service
public class HotelService extends ServiceImpl<HotelMapper, Hotel> implements IHotelService {
}

二.SpringBoot切换druid数据源

1.导入坐标

        <!--druid坐标--><dependency><groupId>com.alibaba</groupId><artifactId>druid-spring-boot-starter</artifactId><version>1.2.8</version></dependency>

2.做配置

#数据源
spring:datasource:url: jdbc:mysql://localhost:3306/库?serverTimezone=GMTusername: rootpassword: 密码driver-class-name: com.mysql.cj.jdbc.Driver#切换数据源类型type: com.alibaba.druid.pool.DruidDataSource#Druid监控平台配置filters: stat,wallmybatis:configuration:map-underscore-to-camel-case: true   #自动驼峰映射type-aliases-package: com.apesource.pojo  #起别名mybatis-plus:configuration:map-underscore-to-camel-case: true #自动驼峰映射(默认开启)log-impl: org.apache.ibatis.logging.stdout.StdOutImpl #日志

3.1DRUID配置参数

3.2Druid监控平台

filters: stat,wall@Configuration
public class DruidConfig {//1.注入数据源@Bean@ConfigurationProperties(prefix = "spring.datasource")public DataSource dataSource(){return new DruidDataSource();}//2.配置servlet@Beanpublic ServletRegistrationBean registrationBean(){//1.创建servlet注册类ServletRegistrationBean<StatViewServlet>  servletRegistrationBean =  new ServletRegistrationBean<StatViewServlet>();//2.创建制作页面的servletStatViewServlet statViewServlet = new StatViewServlet();//3.绑定servletservletRegistrationBean.setServlet(statViewServlet);servletRegistrationBean.setUrlMappings(Arrays.asList("/druid/*"));//4.参数绑定Map<String,String> maps = new HashMap<String,String>();maps.put(StatViewServlet.PARAM_NAME_USERNAME,"admin");maps.put(StatViewServlet.PARAM_NAME_PASSWORD,"123");maps.put(StatViewServlet.PARAM_NAME_ALLOW,"");//白名单maps.put(StatViewServlet.PARAM_NAME_DENY,"192.168.0.12");//黑名单servletRegistrationBean.setInitParameters(maps);return servletRegistrationBean;}//3.配置filter@Beanpublic FilterRegistrationBean filterRegistrationBean(){FilterRegistrationBean<WebStatFilter> bean = new FilterRegistrationBean<WebStatFilter>();bean.setFilter(new WebStatFilter());//所有请求进行监控处理bean.setUrlPatterns(Arrays.asList("/*"));Map<String, String> initPrams = new HashMap<>();//添加不需要忽略的格式信息initPrams.put(WebStatFilter.PARAM_NAME_EXCLUSIONS, "*.js,*.css,/druid/*");bean.setInitParameters(initPrams);return bean;}}