SpingBoot（四）——整合Mybatis(druid连接池)

代码环境

jdk                          1.8 
IDE                          IDEA2007
Springboot              2.1.3.RELEASE

新建SpringBoot项目导入场景启动器和所需jar

  <!--SpringBoot版本号2.1.3.RELEASE-->
<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.3.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>




<dependencies>
		<!--SpringBoot默认不支持jsp官方推荐thymeleaf模板引擎-->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-thymeleaf</artifactId>
		</dependency>
		<!--web核心模块-->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<!--mybatis场景启动器-->
		<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>2.0.0</version>
		</dependency>
		<!--mysql驱动-->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<scope>runtime</scope>
		</dependency>
		<!-- 阿里druid连接池强大好用 -->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid-spring-boot-starter</artifactId>
			<version>1.1.10</version>
		</dependency>
		<!--插件一非必须-->
		<!--导入配置文件处理器，配置文件进行绑定就会有提示-->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-configuration-processor</artifactId>
			<optional>true</optional>
		</dependency>
		<!--插件二非必须-->
		<!--在实体类上使用@Data 就不用再手动生成get/set方法-->
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<optional>true</optional>
		</dependency>
		<!--测试场景-->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

配置数据源

server:
  port: 8081
spring:
  datasource:
    username: root 
    password: root
    url: jdbc:mysql://192.168.1.11:3306/springboot?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull
    driver-class-name: com.mysql.cj.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource
    druid:
      #初始化大小
      initial-size: 5
      #最大
      min-idle: 5
      #最小
      max-active: 20
      #最大超时时间
      max-wait: 60000
      #配置检测时间 关闭空闲连接
      time-between-eviction-runs-millis: 6000
      #配置单个连接最小生存时间
      min-evictable-idle-time-millis: 300000
      #验证数据库连接语句
      validation-query: SELECT 1
      #建议配置为true，不影响性能，并且保证安全性。
      #申请连接的时候检测，如果空闲时间大于timeBetweenEvictionRunsMillis，执行validationQuery检测连接是否有效。
      test-while-idle: true
      #申请连接时执行validationQuery检测连接是否有效，做了这个配置会降低性能。
      test-on-borrow: false
      #归还连接时执行validationQuery检测连接是否有效，做了这个配置会降低性能
      test-on-return: false
      # 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,slf4j
      #SQL最慢监控
      filter:
        stat:
          log-slow-sql: true
    #配置Date返回类型的格式；不用再在web页面上进行转换      
  jackson:
    date-format: yyyy-MM-dd HH:mm:ss
    #mybatis配置
mybatis:
   #配置xml文件位置
  mapper-locations: classpath:mapper/*.xml
  #开启驼峰命名
  configuration:
    map-underscore-to-camel-case: true

开启dao层扫描

@MapperScan("com.springboot.mybatis.dao") //配置dao层的扫描文件
@SpringBootApplication
public class SpringBootIntegrationMybatisApplication {

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

}

代码编写配置druid的servlet

package com.springboot.mybatis.config;

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;

/**
 *阿里连接池   http://localhost:8081/druid        web地址
 */
@Configuration
public class DruidConfig {
    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource druid(){
        return new DruidDataSource();
    }

    //配置管理后台的servlet 即阿里druid中sql的监控页面不能用springboot内置servlet启动
    @Bean
    public ServletRegistrationBean setViewServlet(){
        ServletRegistrationBean bean=new ServletRegistrationBean(new StatViewServlet(),"/druid/*");
        Map<String,String> initParams=new HashMap<>();
        initParams.put("loginUsername","admin"); //登录名称
        initParams.put("loginPassword","123456"); //密码
        initParams.put("allow","127.0.0.1");//白名单
        initParams.put("deny","");//黑名单
        bean.setInitParameters(initParams);
        return bean;
    }
    //配置web监控的filter
    @Bean
    public FilterRegistrationBean webStatFiler(){
        FilterRegistrationBean bean=new FilterRegistrationBean();
        bean.setFilter(new WebStatFilter());
        Map<String,String> initParams=new HashMap<>();
        initParams.put("exclusions","*.js,*.css,/druid/*,/static/**");
        bean.setInitParameters(initParams);
        bean.setUrlPatterns(Arrays.asList("/*"));
        return  bean;
    }
}

5.编写controller/dao/service代码及SQL
GitHub项目地址

SpingBoot（四）——整合Mybatis(druid连接池)

代码环境

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