1、配置文件application.yml
spring:
datasource:
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/nabai
username: root
password: root
initialSize: 5
minIdle: 1
maxActive: 50
maxWait: 60000
timeBetweenEvictionRunsMillis: 60000
minEvictableIdleTimeMilli: 30000
validationQuery: SELECT 1 FROM DUAL
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
poolPreparedStatements: false
filters: stat,wall,log4j
connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
#useGlobalDataSourceStat: true
mybatis:
type-aliases-package: com.eba.bean
2、数据源 阿里的 druid.propertis
#数据库设置
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/nabai?useUnicode=true&characterEncoding=utf8&autoReconnect=true&useSSL=true
spring.datasource.username=root
spring.datasource.password=root
#--------------------------
# 下面为连接池的补充设置，应用到上面所有数据源中
# 初始化大小，最小，最大
spring.datasource.initialSize=5
spring.datasource.minIdle=1
spring.datasource.maxActive=50
# 配置获取连接等待超时的时间
spring.datasource.maxWait=60000
# 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
spring.datasource.timeBetweenEvictionRunsMillis=60000
# 配置一个连接在池中最小生存的时间，单位是毫秒
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
# 打开PSCache，并且指定每个连接上PSCache的大小
spring.datasource.poolPreparedStatements=false
#spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
# 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
spring.datasource.filters=stat,wall,log4j
# 通过connectProperties属性来打开mergeSql功能；慢SQL记录
spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
# 合并多个DruidDataSource的监控数据
#spring.datasource.useGlobalDataSourceStat=true
3、数据源的代码
package com.eba.druidconfig;
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 org.springframework.context.annotation.PropertySource;
import javax.sql.DataSource;
/**
* Created by Thinkpad on 2018/2/8.
*/
@Configuration
@PropertySource(value = "classpath:application.properties")
public class DruidConfiguration {
@Bean(destroyMethod = "close", initMethod = "init")
@ConfigurationProperties(prefix = "spring.datasource")
public DataSource druidDataSource() {
DruidDataSource druidDataSource = new DruidDataSource();
return druidDataSource;
}
/**
* 注册一个StatViewServlet
* @return
*/
@Bean
public ServletRegistrationBean druidStatViewServlet(){
//org.springframework.boot.context.embedded.ServletRegistrationBean提供类的进行注册.
ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(),"/druid/*");
//添加初始化参数：initParams
//白名单：
servletRegistrationBean.addInitParameter("allow","127.0.0.1");
//IP黑名单 (存在共同时，deny优先于allow) : 如果满足deny的话提示:Sorry, you are not permitted to view this page.
servletRegistrationBean.addInitParameter("deny","192.168.1.73");
//登录查看信息的账号密码.
servletRegistrationBean.addInitParameter("loginUsername","admin");
servletRegistrationBean.addInitParameter("loginPassword","123456");
//是否能够重置数据.
servletRegistrationBean.addInitParameter("resetEnable","false");
return servletRegistrationBean;
}
/**
* 注册一个：filterRegistrationBean
* @return
*/
@Bean
public FilterRegistrationBean druidStatFilter(){
FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new WebStatFilter());
//添加过滤规则.
filterRegistrationBean.addUrlPatterns("/*");
//添加不需要忽略的格式信息.
filterRegistrationBean.addInitParameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
return filterRegistrationBean;
}
}
4、配置文件开发dao层
（1）在.yml文件中添加 #配置文件版 有mapperXML配置文件
mybatis:
mapper-locations: classpath:mybatis/mapper/*-mapper.xml
config-location: classpath:mybatis/mybatis-config.xml
（2）在source创建mybatis文件夹,在创建mybatis-config.xml
<?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">
<!--mybatis有mapper配置文件的时候-->
<configuration>
<typeAliases>
<!-- <typeAlias type="com.winter.bean.UserMyBatis" alias="UserMyBatis"></typeAlias>-->
</typeAliases>
</configuration>
(3)再在mybatis下创建mapper文件*-mapper.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.winter.mapper.UserMapper2">
<resultMap id="userMybatisMap" type="com.winter.bean.UserMyBatis">
<id column="id" property="id" jdbcType="VARCHAR"/>
<result column="username" property="username" jdbcType="VARCHAR" />
<result column="pwd" property="pwd" jdbcType="VARCHAR" />
</resultMap>
<sql id="user_Column_List" >
id,username,pwd
</sql>
<select id="getNoAnnotationUser" resultMap="userMybatisMap">
select <include refid="user_Column_List"/> from tb_user;
</select>
</mapper>
3、注解开发dao层
1、有mapper接口，在接口的方法上写SQL语句：
例： //根据id查询用户
@Select("select * from tb_user where id=#{user.id}")
public User select4User(Map<String,Object> param);
2、在application.yml中加：
#注解配置dao层
mybatis:
type-aliases-package: com.eba.bean //自动扫描bean实体类配置
3、自动扫描mapper文件
在启动类加 @MapperScan("com.eba.mapper")//使用注解查询，扫描mapper，dao层
