• 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 ................
}