搭建springboot+mybatis+druid+sqlite/mysql/oracle附带测试
1.版本
springboot2.1.6
jdk1.8
2.最简springboot环境
参考这个博客搭建
https://baijiahao.baidu.com/s?id=1609044252023906449&wfr=spider&for=pc
最新的初始化地址
3.pom（sqlite配置）
spring-boot-starter与spring-boot-starter-test
mybatis-spring-boot-starter
druid
sqlite-jdbc
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.1.1</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.9</version> </dependency> <dependency> <groupId>org.xerial</groupId> <artifactId>sqlite-jdbc</artifactId> <version>3.21.0.1</version> </dependency> </dependencies>
4.配置application.properties
注意1：sqlite不支持spring.datasource.filters的wall，请去掉
注意2：spring.datasource.type=com.alibaba.druid.pool.DruidDataSource以下的连接池的配置无法被druid加载，需要自己将配置设置到druid里，按照官网配置也不行。
官网配置https://github.com/alibaba/druid/tree/master/druid-spring-boot-starter
spring.datasource.driver-class-name=org.sqlite.JDBC spring.datasource.url=jdbc:sqlite:F:/epgis/program/gis-server/dataserver.pak spring.datasource.username= spring.datasource.password= spring.datasource.type=com.alibaba.druid.pool.DruidDataSource # 初始化大小，最小，最大 spring.datasource.initialSize=1 spring.datasource.minIdle=3 spring.datasource.maxActive=20 # 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=30000 spring.datasource.validationQuery=select 'x' 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=true 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 # sqlite不支持wall，使用sqlite请去掉 spring.datasource.filters=stat,slf4j # 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 #useGlobalDataSourceStat=true mybatis.mapper-locations=classpath:mybatis/*.xml
5.将application.properties配置设置到druid里
如果不做第5步，数据库连接池也可以正常使用，但是它是使用的默认配置，非application.properties配置。
注意1：@configurationProperties的prefix里的设置，spring.datasource代表application.properties里的spring.datasource下的值，将自动调用DruidDataSource相同名称的set方法。
import javax.sql.DataSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import com.alibaba.druid.pool.DruidDataSource;
@Configuration
public class DruidConfiguration {
private static final Logger logger = LoggerFactory.getLogger(DruidConfiguration.class);
@Bean
@Primary
@ConfigurationProperties(prefix = "spring.datasource")
public DataSource dataSource1() {
return new DruidDataSource();
}
/*@Bean
public FilterRegistrationBean filterRegistrationBean() {
FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new WebStatFilter());
filterRegistrationBean.addUrlPatterns("/*");
filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
return filterRegistrationBean;
}*/
}
6.编写测试类，验证数据库连接池设置成功
package com.epgis.gisserver;
import java.sql.Connection;
import java.sql.SQLException;
import javax.sql.DataSource;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import com.alibaba.druid.pool.DruidDataSource;
@SpringBootTest
@RunWith(SpringRunner.class)
public class DataSouceTest {
@Autowired
DataSource dataSource1;
@Test
public void contextDuridLoads() throws SQLException {
Connection con = dataSource1.getConnection();
System.err.println("**************");
System.err.println(dataSource1);
DruidDataSource dss = (DruidDataSource)dataSource1;
System.err.println(dss.getName());
System.err.println(dss.getValidationQuery());
System.err.println(dss.getTimeBetweenEvictionRunsMillis());
System.err.println(dss.getMinEvictableIdleTimeMillis());
// 数据源例如：HikariDataSource(springboot2.x默认)，DruidDataSource，dbcp2DataSource
System.err.println(dataSource1.getClass().getName());
// 连接例如org.sqlite.SQLiteConnection
System.err.println(con);
System.err.println("**************");
con.close();
}
}
检查1：dataSource1对象为DruidDataSource即为数据库连接池设置成功。
检查2：dss.getValidationQuery()的值为application.properties里spring.datasource.validationQuery的值"select 'x'"，即为其他数据库连接池配置成功。
7.编写及配置mybatis
很多人对这一步骤很熟悉了，在此简写。
7.1在开始类上加入@MapperScan("com.epgis.gisserver.**.dao")
7.2编写dao接口
7.4application.properties里加入xml文件扫描路径
路径：mybatis.mapper-locations=classpath:mybatis/*.xml
xml对应位置：
7.3编写xml文件
7.4编写测试方法
8.替换sqlite为oracle或mysql
8.1pom
<dependency>
<groupId>org.xerial</groupId>
<artifactId>sqlite-jdbc</artifactId>
<version>3.21.0.1</version>
</dependency>
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11.2.0.2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
8.2application.properties文件
spring.datasource.driver-class-name=org.sqlite.JDBC spring.datasource.url=jdbc:sqlite:F:/epgis/program/gis-server/dataserver.pak spring.datasource.username= spring.datasource.password=
spring.datasource.driver-class-name=oracle.jdbc.OracleDriver spring.datasource.url = jdbc:oracle:thin:@127.0.0.1:1521:orcl spring.datasource.username = test spring.datasource.password = test
spring.datasource.driver-class-name=com.mysql.jdbc.Driver spring.datasource.url=jdbc:mysql://127.0.0.1:3306/mrbird?useUnicode=true&characterEncoding=utf8 spring.datasource.username=test spring.datasource.password= test
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