rror querying database. Cause: java.sql.SQLException: null, message from server: "Host '1

Posted 2020-12-31 哆啦任意门

连接远程mysql的时候  出现如下错误

org.apache.ibatis.exceptions.PersistenceException:
### Error querying database.  Cause: java.sql.SQLException: null,  message from server: "Host \'192.168.30.1\' is not allowed to connect to this MySQL server"
### The error may exist in UserMapper.xml
### The error may involve com.myth.mybatis.UserMapper.selectUser
### The error occurred while executing a query
### Cause: java.sql.SQLException: null,  message from server: "Host \'192.168.30.1\' is not allowed to connect to this MySQL server"

 at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
 at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:150)
 at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141)
 at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:77)
 at MybatisTest.Test(MybatisTest.java:20)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:483)
 at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
 at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
 at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
 at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
 at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
 at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
 at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
 at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
 at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
 at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
 at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
 at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
 at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
 at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
 at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
 at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.sql.SQLException: null,  message from server: "Host \'192.168.30.1\' is not allowed to connect to this MySQL server"
 at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:964)
 at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:897)
 at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:886)
 at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1040)
 at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2198)
 at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2229)
 at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2024)
 at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:779)
 at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
 at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
 at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
 at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
 at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:389)
 at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)
 at java.sql.DriverManager.getConnection(DriverManager.java:664)
 at java.sql.DriverManager.getConnection(DriverManager.java:208)
 at org.apache.ibatis.datasource.unpooled.UnpooledDataSource.doGetConnection(UnpooledDataSource.java:201)
 at org.apache.ibatis.datasource.unpooled.UnpooledDataSource.doGetConnection(UnpooledDataSource.java:196)
 at org.apache.ibatis.datasource.unpooled.UnpooledDataSource.getConnection(UnpooledDataSource.java:93)
 at org.apache.ibatis.datasource.pooled.PooledDataSource.popConnection(PooledDataSource.java:385)
 at org.apache.ibatis.datasource.pooled.PooledDataSource.getConnection(PooledDataSource.java:89)
 at org.apache.ibatis.transaction.jdbc.JdbcTransaction.openConnection(JdbcTransaction.java:138)
 at org.apache.ibatis.transaction.jdbc.JdbcTransaction.getConnection(JdbcTransaction.java:60)
 at org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:336)
 at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:84)
 at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:62)
 at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:324)
 at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156)
 at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109)
 at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83)
 at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148)
 ... 25 more

 

原因是：远程服务器不允许你的java程序访问它的数据库。所以，我们要对远程服务器进行设置，使它允许你进行连接。

方案一：改表：

 

use mysql

update user set host = \'%\' where user=\'root\';

重启Mysql

 可以看到结果了