Spring 连接MySQL报错java.sql.SQLException: Unknown system variable 'tx_isolation'

先是报错255,这个时候需要把 jdbc:mysql://localhost:3306/projUse 写成 jdbc:mysql://localhost:3306/projUse?useUnicode=true&characterEncoding=utf8 后来报错 java.sql.SQLException: Unknown system variable 'tx_isolation' 解决办法: 在pom.xml文件中将MySQL Connector / J版本升级为8: <!-- M…

连接mysql报错java.sql.SQLException: The server time zone value '�й��׼ʱ��' is unrecognized...解决方法

报错内容: java.sql.SQLException: The server time zone value '�й��׼ʱ��' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time…

远程连接Mysql报错 java.sql.SQLException:null,message from server ... is not allowed to connect

在MySQL命令行输入如下命令: use mysql; select host from user; update user set host ='%' where user ='root'; 然后重启MySQL服务.…

连接数据库出现java.sql.SQLException: Unknown system variable 'tx_isolation'

问题分析 :mysql-connector-java的版本太低,数据库的版本太高因此将mysql-connector-java升级到最新版本就解 .或者降低MySQL的版本.我之前用的是8.0版本的MySQL,改为5.5的就没事!!!!!…

数据库连接异常 Caused by: java.sql.SQLException: Unknown system variable 'tx_isolation'

1.错误截图 2.错误分析数据库的版本比连接驱动的版本高很多. 3.解决方法因此将mysql-connector-java升级到最新版本就解决了问题. 原本我的版本是mysql-connector-java-5.1.7.jar 后来提升到mysql-connector-java-8.0.15.jar就可以了可以去maven的网站 https://mvnrepository.com/ 找到所需版本,复制到pom.xml自动生成就可以了…

Mysql报错java.sql.SQLException:null,message from server:"Host '27,45,38,132' is not allowed to connect

Mysql报错java.sql.SQLException:null,message from server:"Host '27,45,38,132' is not allowed to connect 远程连接mysql数据库,出现异常: null,message from server:"Host '27,45,38,132' is not allowed to connect 解决方案: 原因是:远程服务器不允许你访问它的数据库.所以,我们要对远程服务器进行设置,使它允许你进行连接…

maven+springmvc出现：java.sql.SQLException: Unknown system variable 'query_cache_size'

连接mysql时一直出现以下的错误: org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception…

关于 64位系统 java连接access 报错java.sql.SQLException: [Microsoft][ODBC 驱动程序管理器] 未发现数据源名称并且未指定默认驱动程序

报错的原因是url = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=E:/公司/2000.mdb"; 这样是不行滴,要改成 url = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb, *.accdb)};DBQ=E:/公司/2000.mdb"; 我去,网上找了好久好久,才找到...…

解决 sqlalchemy 报错：（1193, "Unknown system variable 'tx_isolation'"）

1出现此报错的原因是使用的mysql8.0 以前用的是:tx_isolation 现在用是: transaction_isolation a.通过升级 sqlalchemy 的方法可以解决此问题, pip install -i https://pypi.tuna.tsinghua.edu.cn/simple --upgrade sqlalchemy --ignore-installed(亲测有效————) b.通过降低,mysql 版本来解决这个问题.…

MySQL报错: java.sql.SQLException: Column count doesn't match value count at row 1

这个是今天写新项目的是后,写插入语句测试用例的时候报这个错误, 其实错误的原因就是插入语句的前面的列和后面的值的个数不对. 错在此,仔细检查一下,看看少了哪一个,然后修改就可以了.…

java连接sqlserver2008报错 java.sql.SQLException: 对象名 '表名' 无效.

注意:c3p0的数据库配置方式为: <named-config name="sqlsvr"> <property name="driverClass">net.sourceforge.jtds.jdbc.Driver</property> <property name="jdbcUrl">jdbc:jtds:sqlserver://localhost:1433/WaterNet_DaFeng<…

java.sql.SQLException: Unknown system variable 'query_cache_size'

改为 <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.11</version> </dependency>…

连接mysql客户端报错: java.sql.SQLException: Unable to load authentication plugin 'caching_sha2_password'

报这个错可能是因为用了低版本的的客户端.驱动连接高版本的mysql服务器. 解决方式有三种:升级客户端版本.修改服务端认证方式和适应服务端认证方式. 我是通过升级客户端版本解决,参考一下链接: Upgrading to MySQL Connector/J 8.0 同时收集了其他的解决问题的链接: 连接mysql 出现:java.sql.SQLException: Unable to load authentication plugin 'caching_sha2_password'…

报错:java.sql.SQLException: The server

报错:java.sql.SQLException: The server time zone value '�й��׼ʱ��' is unrecognized 在IDEA运行是报出例如相识的错误时: java.sql.SQLException: The server time zone value '�й��׼ʱ��' is unrecognized or represents more than one time zone. You must configure either the se…

连接mysql数据库报错java.sql.SQLException: The server time zone value '�й��׼ʱ��' is unrecognized...解决方法

今天连接mysql数据库报错如下: java.sql.SQLException: The server time zone value '�й��׼ʱ��' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more s…

java中mysql查询报错java.sql.SQLException: Before start of result set

异常:java.sql.SQLException: Before start of result set 解决方法:使用rs.getString();前一定要加上rs.next(); sm = conn.createStatement(); ResultSet rs = null; String sql_max = "SELECT id FROM a WHERE name= '" + name + "' ORDER BY online_time DESC LIMIT 1&qu…

Mybatis 报错java.sql.SQLException: No suitable driver found for http://www.example.com

运行项目报错 Error querying database. Cause: java.sql.SQLException: No suitable driver found for http://www.example.com org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: java.sql.SQLException: No suitable driver found f…

在mybatis中使用存储过程报错java.sql.SQLException: ORA-06550: 第 1 行, 第 7 列: PLS-00905: 对象 USER1.HELLO_TEST 无效 ORA-06550: 第 1 行, 第 7 列:

hello_test是我的存储过程的名字,在mapper.xml文件中是这么写的 <select id="getPageByProcedure" statementType="CALLABLE" databaseId="oracle"> {call hello_test( #{start,mode=IN,jdbcType=INTEGER}, #{end,mode=IN,jdbcType=INTEGER}, #{count,mode=O…

NC57访问报错:java.sql.SQLException: Io 异常: Got minus one from a read call

一.报错信息 1. 前端登录界面 2. 后台应用日志报错信息一致为: $$callid= $$thread=[Service Monitor and Runtime Enroment] $$host= $$userid= $$ts=2017-05-23 09:18:13 $$remotecall=[nc.bs.mw.ejbsql.IerpXADataSource] $$debuglevel=ERROR $$msg=initializing the connection pool fail…

dea创建Maven工程用c3p0连接数据库报错java.sql.SQLException: Connections could not be acquired from the underlying

idea java.sql.SQLException: Connections could not be acquired from the underlying database! 转载自:https://blog.csdn.net/iXinRu/article/details/82624112 把c3p0-config.xml放到resources下面即可…

报错 java.sql.SQLException: Value '0000-00-00 00:00:00' can not be represented as java.sql.Timestamp 原因

sql异常 java.sql.SQLException: Value '0000-00-00 00:00:00' can not be represented as java.sql.Timestamp 是因为java不能将 0000-00-00 00:00:00 转成正常时间格式…

连接mysql时提示java.sql.SQLException: Access denied for user 'root'@'DESKTOP-N2B2D9A' (using password: YES)

用root连接mysql时提示:访问被拒绝检查一下mysql server是否开启,发现后台在运行着.. 然后查了一下mysql的用户表,发现root只能运行使用本地ip(localhost或者127.0.0.1)进行连接解决方法:新开一个权限GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'jeffw' WITH GRANT OPTION; 然后查询一下:select * from user; 新开的root的已经开启权限,…

hive报错java.sql.SQLException: null, message from server: "Host '192.168.126.100' is not allowed to connect to this MySQL server"

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连接mysql 出现：java.sql.SQLException: Unable to load authentication plugin 'caching_sha2_password'.

数据测试的时候出现: 网上查资料说的是mysql5.x 版本和 8.x版本的区别: 5.7版本是:default_authentication_plugin=mysql_native_password 8.x版本就是:default_authentication_plugin=caching_sha2_password 有网友说是将my.ini 中的配置改成5.7 就可以了,但是my.ini在哪儿呢.... 安装目录:C:\Program Files\MySQL\MySQL Server 8.…

Spring data jpa 报错: java.sql.SQLSyntaxErrorExceptoion: Table ' test.hibernate_sequence' doesn`t exists

错误信息如图: 错误原因:在自定义主键是没有注明自增策略解决办法:明确主键自增策略,比如 @Entity @Table(name = "t_order") @Data @AllArgsConstructor @NoArgsConstructor @Builder public class Order implements Serializable { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Lon…

Java连接MySql报错—— com.mysql.cj.exceptions.InvalidConnectionAttributeException

详细报错 java.sql.SQLException: The server time zone value '�й��׼ʱ��' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time z…

java.sql.SQLException: Unknown column 'user0_.user_name' in 'field list' 报错问题

报错信息: java.sql.SQLException: Unknown column 'user0_.user_name' in 'field list'Query is: select user0_.id as id1_0_, user0_.user_name as user_nam2_0_, user0_.password as password3_0_ from user user0_java thread: http-nio-8881-exec-1 Hibernate报错:说表里没有u…