spring+mybatis+多数据源(mysql+oracle)配置
1.自定义注解
@Target({ElementType.TYPE,ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
public @interface DataSource {
String value();
}
2.
package com.utils;
public class DbContextHolder {
private static final ThreadLocalTHREAD_DATA_SOURCE =new ThreadLocal<>();
/**
* 设置当前数据库
*/
public static void setDataSource(String dataSource) {
THREAD_DATA_SOURCE.set(dataSource);
}
/**
* 取得当前数据库
*/
public static String getDataSource() {
return THREAD_DATA_SOURCE.get();
}
/**
* 清除上下文数据
*/
public static void clearDataSource() {
THREAD_DATA_SOURCE.remove();
}
}
3.
package com.utils;
import java.lang.reflect.Method;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.reflect.MethodSignature;
public class DataSourceAspect {
// 拦截目标方法，获取由@DataSource指定的数据源标识，设置到线程存储中以便切换数据源
public void intercept(JoinPoint point) throws Exception{
Class target = point.getTarget().getClass();
MethodSignature signature=(MethodSignature)point.getSignature();
// 默认使用目标类型的注解，如果没有则使用其实现接口的注解
for (Class clazz : target.getInterfaces()) {
resolveDataSource(clazz, signature.getMethod());
}
resolveDataSource(target, signature.getMethod());
}
/**
* 提取目标对象方法注解和类型注解中的数据源标识
*/
public void resolveDataSource(Classclazz,Method method) {
try {
Class[]types=method.getParameterTypes();
// 默认使用类型注解
if (clazz.isAnnotationPresent(DataSource.class)) {
DataSource source = clazz.getAnnotation(DataSource.class);
DbContextHolder.setDataSource(source.value());
}
// 方法注解可以覆盖类型注解
Method m=clazz.getMethod(method.getName(), types);
if (m!=null && m.isAnnotationPresent(DataSource.class)) {
DataSource source = m.getAnnotation(DataSource.class);
DbContextHolder.setDataSource(source.value());
}
} catch (Exception e) {
System.out.println(clazz+":"+e.getMessage());
}
}
}
4.
package com.utils;
import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;
public class MultipleDataSource extends AbstractRoutingDataSource {
@Override
protected Object determineCurrentLookupKey() {
// TODO Auto-generated method stub
return DbContextHolder.getDataSource();
}
}
classpath:db.properties
rowBoundsWithCount=true
PageRowBounds=true
offsetAsPageNum=true
pageSizeZero=true
reasonable=true
测试执行效果：
----------------------mysql---------------------------
2020-06-22 11:05:15 [http-nio-8080-exec-4] DEBUG SqlSessionUtils:97 - Creating a new SqlSession
2020-06-22 11:05:15 [http-nio-8080-exec-4] DEBUG SqlSessionUtils:148 - SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4a9c057] was not registered for synchronization because synchronization is not active
2020-06-22 11:05:15 [http-nio-8080-exec-4] DEBUG DataSourceUtils:114 - Fetching JDBC Connection from DataSource
2020-06-22 11:05:18 [http-nio-8080-exec-4] DEBUG SpringManagedTransaction:87 - JDBC Connection [HikariProxyConnection@987002885 wrapping com.mysql.jdbc.JDBC4Connection@627776c6] will not be managed by Spring
2020-06-22 11:05:18 [http-nio-8080-exec-4] DEBUG getAll:145 - ==> Preparing: select * from user
2020-06-22 11:05:18 [http-nio-8080-exec-4] DEBUG getAll:145 - ==> Parameters:
2020-06-22 11:05:18 [http-nio-8080-exec-4] DEBUG getAll:145 - <== Total: 12
2020-06-22 11:05:18 [http-nio-8080-exec-4] DEBUG SqlSessionUtils:191 - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4a9c057]
2020-06-22 11:05:18 [http-nio-8080-exec-4] DEBUG DataSourceUtils:340 - Returning JDBC Connection to DataSource
User{id=1, username='小一', password='1234', idCardNo='null', birthday='null', phone='null', email='null', sex='null', age=null, createTime=null, updateTime=null, provinceCode='null', cityCode='null', districtCode='null', address='null', detailAddress='null', desp='null', type=null, orForbidden=null, orDel=null}
User{id=2, username='小二', password='1234', idCardNo='null', birthday='null', phone='null', email='null', sex='null', age=null, createTime=null, updateTime=null, provinceCode='null', cityCode='null', districtCode='null', address='null', detailAddress='null', desp='null', type=null, orForbidden=null, orDel=null}
User{id=3, username='小三', password='1234', idCardNo='null', birthday='null', phone='null', email='null', sex='null', age=null, createTime=null, updateTime=null, provinceCode='null', cityCode='null', districtCode='null', address='null', detailAddress='null', desp='null', type=null, orForbidden=null, orDel=null}
User{id=4, username='小四', password='1234', idCardNo='null', birthday='null', phone='null', email='null', sex='null', age=null, createTime=null, updateTime=null, provinceCode='null', cityCode='null', districtCode='null', address='null', detailAddress='null', desp='null', type=null, orForbidden=null, orDel=null}
User{id=5, username='小五', password='1234', idCardNo='null', birthday='null', phone='null', email='null', sex='null', age=null, createTime=null, updateTime=null, provinceCode='null', cityCode='null', districtCode='null', address='null', detailAddress='null', desp='null', type=null, orForbidden=null, orDel=null}
User{id=6, username='小六', password='1234', idCardNo='null', birthday='null', phone='null', email='null', sex='null', age=null, createTime=null, updateTime=null, provinceCode='null', cityCode='null', districtCode='null', address='null', detailAddress='null', desp='null', type=null, orForbidden=null, orDel=null}
User{id=7, username='小七', password='1234', idCardNo='null', birthday='null', phone='null', email='null', sex='null', age=null, createTime=null, updateTime=null, provinceCode='null', cityCode='null', districtCode='null', address='null', detailAddress='null', desp='null', type=null, orForbidden=null, orDel=null}
User{id=8, username='小八', password='1234', idCardNo='null', birthday='null', phone='null', email='null', sex='null', age=null, createTime=null, updateTime=null, provinceCode='null', cityCode='null', districtCode='null', address='null', detailAddress='null', desp='null', type=null, orForbidden=null, orDel=null}
User{id=9, username='小九', password='1234', idCardNo='null', birthday='null', phone='null', email='null', sex='null', age=null, createTime=null, updateTime=null, provinceCode='null', cityCode='null', districtCode='null', address='null', detailAddress='null', desp='null', type=null, orForbidden=null, orDel=null}
User{id=10, username='小十', password='1234', idCardNo='null', birthday='null', phone='null', email='null', sex='null', age=null, createTime=null, updateTime=null, provinceCode='null', cityCode='null', districtCode='null', address='null', detailAddress='null', desp='null', type=null, orForbidden=null, orDel=null}
User{id=11, username='小去fadsf', password='1234', idCardNo='null', birthday='null', phone='null', email='null', sex='男', age=null, createTime=null, updateTime=null, provinceCode='null', cityCode='null', districtCode='null', address='null', detailAddress='null', desp='null', type=null, orForbidden=null, orDel=null}
User{id=12, username='小去fadsf', password='1234', idCardNo='null', birthday='null', phone='null', email='null', sex='男', age=null, createTime=null, updateTime=null, provinceCode='null', cityCode='null', districtCode='null', address='null', detailAddress='null', desp='null', type=null, orForbidden=null, orDel=null}
----------------------oralce---------------------------
2020-06-22 11:05:18 [http-nio-8080-exec-4] DEBUG SqlSessionUtils:97 - Creating a new SqlSession
2020-06-22 11:05:18 [http-nio-8080-exec-4] DEBUG SqlSessionUtils:148 - SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@38c5c7c9] was not registered for synchronization because synchronization is not active
2020-06-22 11:05:18 [http-nio-8080-exec-4] DEBUG DataSourceUtils:114 - Fetching JDBC Connection from DataSource
2020-06-22 11:05:19 [http-nio-8080-exec-4] DEBUG SpringManagedTransaction:87 - JDBC Connection [HikariProxyConnection@24572899 wrapping oracle.jdbc.driver.T4CConnection@79232d37] will not be managed by Spring
2020-06-22 11:05:19 [http-nio-8080-exec-4] DEBUG getAll:145 - ==> Preparing: select * from "sys_user"
2020-06-22 11:05:20 [http-nio-8080-exec-4] DEBUG getAll:145 - ==> Parameters:
2020-06-22 11:05:20 [http-nio-8080-exec-4] DEBUG getAll:145 - <== Total: 5
2020-06-22 11:05:20 [http-nio-8080-exec-4] DEBUG SqlSessionUtils:191 - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@38c5c7c9]
2020-06-22 11:05:20 [http-nio-8080-exec-4] DEBUG DataSourceUtils:340 - Returning JDBC Connection to DataSource
{birthday=2020-10-26, password=1234, createtime=2020-06-08 08:59:22.0, address=地址, phone=15255710558, userane=小一, sex=女, id=1}
{birthday=2020-10-26, password=1234, createtime=2020-06-08 08:59:22.0, address=地址, phone=15255710558, userane=小二, sex=女, id=2}
{birthday=2020-10-26, password=1234, createtime=2020-06-08 08:59:22.0, address=地址, phone=15255710558, userane=小三, sex=女, id=3}
{birthday=2020-10-26, password=1234, createtime=2020-06-08 08:59:22.0, address=地址, phone=15255710558, userane=小四, sex=女, id=4}
{birthday=2020-10-26, password=1234, createtime=2020-06-08 08:59:22.0, address=地址, phone=15255710558, userane=小五, sex=女, id=5}
2020-06-22 11:05:20 [http-nio-8080-exec-4] DEBUG RequestResponseBodyMethodProcessor:267 - Using 'application/json;q=0.8', given [text/html, application/xhtml+xml, image/webp, image/apng, application/signed-exchange;v=b3, application/xml;q=0.9, */*;q=0.8] and supported [application/json, application/*+json]
2020-06-22 11:05:20 [http-nio-8080-exec-4] DEBUG RequestResponseBodyMethodProcessor:297 - Nothing to write: null body
2020-06-22 11:05:20 [http-nio-8080-exec-4] DEBUG DispatcherServlet:1123 - Completed 200 OK