java druid sqlite_springboot+mybatis+druid+sqlite/mysql/oracle
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
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
org.springframework.boot
spring-boot-starter
org.springframework.boot
spring-boot-starter-test
test
org.mybatis.spring.boot
mybatis-spring-boot-starter
1.1.1
com.alibaba
druid
1.1.9
org.xerial
sqlite-jdbc
3.21.0.1
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。
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=1spring.datasource.minIdle=3spring.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=30000spring.datasource.validationQuery=select 'x'spring.datasource.testWhileIdle=truespring.datasource.testOnBorrow=falsespring.datasource.testOnReturn=false# 打开PSCache，并且指定每个连接上PSCache的大小
spring.datasource.poolPreparedStatements=truespring.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=truemybatis.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;
@Configurationpublic classDruidConfiguration {private static final Logger logger = LoggerFactory.getLogger(DruidConfiguration.class);
@Bean
@Primary
@ConfigurationProperties(prefix= "spring.datasource")publicDataSource dataSource1() {return newDruidDataSource();
}/*@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 classDataSouceTest {
@Autowired
DataSource dataSource1;
@Testpublic voidcontextDuridLoads() 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
org.xerial
sqlite-jdbc
3.21.0.1
com.oracle
ojdbc6
11.2.0.2
mysql
mysql-connector-java
5.1.6
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