• 当某些sql因为不知名原因堵塞时，为了不影响后台服务运行，想要给sql增加执行时间限制，超时后就抛异常，保证后台线程不会因为sql堵塞而堵塞。

方法一

yml全局配置：单数据源可以，多数据源时会失效

方法二

java配置类配置：：成功抛出超时异常。

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
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 org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;import javax.sql.DataSource;@Configuration
@MapperScan(basePackages = "top.oldmoon.bill.mapper", sqlSessionFactoryRef = "sqlSessionFactory")
public class DBConfiguration {@Primary@Bean(name = "dataSource")@ConfigurationProperties(prefix = "spring.datasource")public DataSource gfDataSource() {DruidDataSource dataSource = DruidDataSourceBuilder.create().build();return dataSource;}@Primary@Bean(name = "sqlSessionFactory")public SqlSessionFactory gfSqlSessionFactory(@Qualifier("dataSource") DataSource dataSource) throws Exception {SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();factoryBean.setDataSource(dataSource);factoryBean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/*.xml"));org.apache.ibatis.session.Configuration configuration = new org.apache.ibatis.session.Configuration();configuration.setDefaultStatementTimeout(1); // 设置sql执行超时时间：：（秒）factoryBean.setConfiguration(configuration);SqlSessionFactory sqlSessionFactory = factoryBean.getObject();return sqlSessionFactory;}@Primary@Bean(name = "transactionManager")public DataSourceTransactionManager gfTransactionManager(@Qualifier("dataSource") DataSource dataSource) {return new DataSourceTransactionManager(dataSource);}@Primary@Bean(name = "sqlSessionTemplate")public SqlSessionTemplate gfSqlSessionTemplate(@Qualifier("sqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {SqlSessionTemplate sqlSessionTemplate = new SqlSessionTemplate(sqlSessionFactory);return sqlSessionTemplate;}
}

Fri Mar 12 15:56:31 CST 2022--方法开始执行！！
2022-03-12 15:56:38.508 ERROR 24484 --- [nio-8111-exec-3] o.api.advice.ExceptionHandlerAdvice      : 未知异常：
### Error querying database.  Cause: com.mysql.cj.jdbc.exceptions.MySQLTimeoutException: Statement cancelled due to timeout or client request
### The error may exist in file [E:\space-persional\git\oldmoon-frame\oldmoon-app-bill\out\production\resources\mybatis\UserMapper.xml]
### The error may involve defaultParameterMap
### The error occurred while setting parameters
### SQL: select * from V_BGD_PWGM_PB_21
### Cause: com.mysql.cj.jdbc.exceptions.MySQLTimeoutException: Statement cancelled due to timeout or client request
; Statement cancelled due to timeout or client request; nested exception is com.mysql.cj.jdbc.exceptions.MySQLTimeoutException: Statement cancelled due to timeout or client request
org.springframework.dao.QueryTimeoutException: 

{"resultCode": "2","resultMsg": "未知异常，请联系管理员！","token": null,"resultInfo": "\r\n### Error querying database.  Cause: com.mysql.cj.jdbc.exceptions.MySQLTimeoutException: Statement cancelled due to timeout or client request\r\n### The error may exist in file ................
}