SpringBoot - com.microsoft.sqlserver.jdbc.SQLServerException: 对象名 ‘DUAL‘ 无效 | Druid双数据源MySQL+SQL ser
在SpringBoot项目中使用双数据源MySQL和SQLserver时，运行报错
com.microsoft.sqlserver.jdbc.SQLServerException: 对象名 'DUAL' 无效
nested exception is org.apache.ibatis.exceptions.PersistenceException:
### Error querying database.
Cause: org.springframework.jdbc.CannotGetJdbcConnectionException:
Failed to obtain JDBC Connection; nested exception is com.microsoft.sqlserver.jdbc.SQLServerException: 对象名 'DUAL' 无效。
### The error may exist in file [D:\workspace(IDEA)\xxxx\xxx\target\classes\mapper\xxx\xxx.xml]
### The error may involve com.xxx.xxx.mapper.xxx.countMaleXunwu
### The error occurred while executing a query
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection;
nested exception is com.microsoft.sqlserver.jdbc.SQLServerException: 对象名 'DUAL' 无效。
com.microsoft.sqlserver.jdbc.SQLServerException: 对象名 'DUAL' 无效。
### Error querying database.
Cause: org.springframework.jdbc.CannotGetJdbcConnectionException:
Failed to obtain JDBC Connection; nested exception is com.microsoft.sqlserver.jdbc.SQLServerException: 对象名 'DUAL' 无效。
### The error may exist in file [D:\workspace(IDEA)\xxx\xxx\target\classes\mapper\xxx\xxx.xml]
### The error may involve com.xxx.xxx.xxx.xxxx.countMaleXunwu
### The error occurred while executing a query
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is com.microsoft.sqlserver.jdbc.SQLServerException: 对象名 'DUAL' 无效。]
15:24:52.057 [Druid-ConnectionPool-Create-1458706578] ERROR c.a.d.p.DruidDataSource - [run,2787] - create connection SQLException, url: jdbc:sqlserver://127.0.0.1:1433;DatabaseName=test, errorCode 208, state S0002我们在自己的代码里面全局搜索这个DUAL，只有在Druid里面使用了这个语句去验证数据库的连接信息
导致错误产生原因：druid 检查sql 有效性，在application.prppertis 文件添加如下配置
# 配置检测连接是否有效，用来检测连接是否有效的sql，要求是一个查询语句(mybatis)
validationQuery: SELECT 1 FROM DUAL在MySQL下面可以正常的使用返回1，MySQL有对象DUAL
但是SQL server 没有对象DUAL,也就是这个语句在SQL server下面是不能运行的，所以报错了
解决方法
改成
validationQuery: SELECT 1导入salserver驱动包
com.microsoft.sqlserver
sqljdbc4
4.0
yml完整配置如下：
# 数据源配置
spring:
datasource:
# 数据库连接池 统一使用com.zaxxer.hikari.HikariDataSource；不使用com.alibaba.druid.pool.DruidDataSource
type: com.zaxxer.hikari.HikariDataSource
driverClassName: com.mysql.cj.jdbc.Driver
druid:
# 主库数据源
master:
url: jdbc:mysql://${DB_HOST:XX}:${DB_PORT:3306}/${DB_NAME:XX}?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull
username: ${DB_USER:XX}
password: ${DB_PWD:XX}
# 从库数据源
sqlserver:
# 从数据源开关/默认关闭
enabled: true
driverClassName: com.microsoft.sqlserver.jdbc.SQLServerDriver # :${DB_PORT:1433}
url: jdbc:sqlserver://XX:1433;DatabaseName=XX
username: XX
password: XX
# 初始连接数
initialSize: 5
# 最小连接池数量
minIdle: 10
# 最大连接池数量
maxActive: 20
# 配置获取连接等待超时的时间
maxWait: 60000
# 配置连接超时时间
connectTimeout: 30000
# 配置网络超时时间
socketTimeout: 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
timeBetweenEvictionRunsMillis: 60000
# 配置一个连接在池中最小生存的时间，单位是毫秒
minEvictableIdleTimeMillis: 300000
# 配置一个连接在池中最大生存的时间，单位是毫秒
maxEvictableIdleTimeMillis: 900000
# 配置检测连接是否有效
validationQuery: SELECT 1 #SELECT 1 FROM DUAL
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
webStatFilter:
enabled: true
statViewServlet:
enabled: true
# 设置白名单，不填则允许所有访问
allow:
url-pattern: /druid/*
# 控制台管理用户名和密码
login-username: admin
login-password: 123456
filter:
stat:
enabled: true
# 慢SQL记录
log-slow-sql: true
slow-sql-millis: 1000
merge-sql: true
wall:
config:
multi-statement-allow: true动态数据源配置：
package com.ceekee.hotel.config;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.sql.DataSource;
import com.ceekee.hotel.config.properties.DruidProperties;
import com.ceekee.hotel.datasource.DynamicDataSource;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder;
import com.alibaba.druid.spring.boot.autoconfigure.properties.DruidStatProperties;
import com.alibaba.druid.util.Utils;
import com.ceekee.hotel.enums.DataSourceType;
import com.ceekee.hotel.utils.spring.SpringUtils;
/**
* druid 配置多数据源
*
* @author zhangming
*/
@Configuration
public class DruidConfig {
@Bean
@ConfigurationProperties("spring.datasource.druid.master")
public DataSource masterDataSource(DruidProperties druidProperties)
{
DruidDataSource dataSource = DruidDataSourceBuilder.create().build();
return druidProperties.dataSource(dataSource);
}
@Bean
@ConfigurationProperties("spring.datasource.druid.slave")
@ConditionalOnProperty(prefix = "spring.datasource.druid.slave", name = "enabled", havingValue = "true")
public DataSource slaveDataSource(DruidProperties druidProperties) {
DruidDataSource dataSource = DruidDataSourceBuilder.create().build();
//!!! druid 检查sql 有效性
// 不加报错：com.microsoft.sqlserver.jdbc.SQLServerException: Invalid object name 'DUAL'.
dataSource.setValidationQuery("SELECT 1");
return druidProperties.dataSource(dataSource);
}
@Bean(name = "dynamicDataSource")
@Primary
public DynamicDataSource dataSource(DataSource masterDataSource)
{
Map targetDataSources = new HashMap<>();
targetDataSources.put(DataSourceType.MASTER.name(), masterDataSource);
setDataSource(targetDataSources, DataSourceType.SLAVE.name(), "slaveDataSource");
return new DynamicDataSource(masterDataSource, targetDataSources);
}
/**
* 设置数据源
*
* @param targetDataSources 备选数据源集合
* @param sourceName 数据源名称
* @param beanName bean名称
*/
public void setDataSource(Map targetDataSources, String sourceName, String beanName)
{
try
{
DataSource dataSource = SpringUtils.getBean(beanName);
targetDataSources.put(sourceName, dataSource);
}
catch (Exception e)
{
}
}
/**
* 去除监控页面底部的广告
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
@Bean
@ConditionalOnProperty(name = "spring.datasource.druid.statViewServlet.enabled", havingValue = "true")
public FilterRegistrationBean removeDruidFilterRegistrationBean(DruidStatProperties properties)
{
// 获取web监控页面的参数
DruidStatProperties.StatViewServlet config = properties.getStatViewServlet();
// 提取common.js的配置路径
String pattern = config.getUrlPattern() != null ? config.getUrlPattern() : "/druid/*";
String commonJsPattern = pattern.replaceAll("\\*", "js/common.js");
final String filePath = "support/http/resources/js/common.js";
// 创建filter进行过滤
Filter filter = new Filter()
{
@Override
public void init(javax.servlet.FilterConfig filterConfig) throws ServletException
{
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException
{
chain.doFilter(request, response);
// 重置缓冲区，响应头不会被重置
response.resetBuffer();
// 获取common.js
String text = Utils.readFromResource(filePath);
// 正则替换banner, 除去底部的广告信息
text = text.replaceAll("
", "");
text = text.replaceAll("powered.*?shrek.wang", "");
response.getWriter().write(text);
}
@Override
public void destroy()
{
}
};
FilterRegistrationBean registrationBean = new FilterRegistrationBean();
registrationBean.setFilter(filter);
registrationBean.addUrlPatterns(commonJsPattern);
return registrationBean;
}
}