数据库读取数据错误
来源：3-4 集成持久层框架Mybatis
媛猿
2021-05-07
1、数据库连接配置
application.properties
# 增加数据库连接
spring.datasource.url=jdbc:mysql://rm-uf6470s9615e13hc4no.mysql.rds.aliyuncs.com/wikidev?characterEncoding=UTF8&autoReconnect=true&serverTimezone=Asia/Shanghai&allowMultiQueries=true
spring.datasource.username=wiki@localhost
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
test.http 测试代码
执行测试代码结果
问题是:
运行出来的不是我本地数据库里写入的值，不知道程序读的哪个数据库？我配置的数据库username和password是本地数据库信息
2回答
-
这个数据库连接是我的，你可以改成你自己的，下面的错就是数据库没连上。地址、用户名、密码全部换成你自己的
012021-05-08 -
媛猿
提问者
2021-05-07
我重启了一下服务，再运行/test/list报错500
```
{
"timestamp": "2021-05-07T09:22:31.885+00:00",
"status": 500,
"error": "Internal Server Error",
"trace": "org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: \n### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.\n### The error may exist in file [/Users/wy/learn/java_wiki/wiki/target/classes/mapper/TestMapper.xml]\n### The error may involve com.tongcheng.wiki.mapper.TestMapper.list\n### The error occurred while executing a query\n### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.\n\tat org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:92)\n\tat org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:440)\n\tat com.sun.proxy.$Proxy59.selectList(Unknown Source)\n\tat org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:223)\n\tat org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:147)\n\tat org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:80)\n\tat org.apache.ibatis.binding.MapperProxy$PlainMethodInvoker.invoke(MapperProxy.java:152)\n\tat org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:85)\n\tat com.sun.proxy.$Proxy60.list(Unknown Source)\n\tat com.tongcheng.wiki.service.TestService.list(TestService.java:16)\n\tat com.tongcheng.wiki.controller.TestController.list(TestController.java:40)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\n\tat sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\n\tat java.lang.reflect.Method.invoke(Method.java:498)\n\tat org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197)\n\tat org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141)\n\tat org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106)\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:893)\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:807)\n\tat org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)\n\tat org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1061)\n\tat org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:961)\n\tat org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)\n\tat org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:626)\n\tat org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:733)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)\n\tat org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)\n\tat org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542)\n\tat org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)\n\tat org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)\n\tat org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)\n\tat org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)\n\tat org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374)\n\tat org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)\n\tat org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)\n\tat org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590)\n\tat org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)\n\tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)\n\tat org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)\n\tat java.lang.Thread.run(Thread.java:748)\nCaused by: org.apache.ibatis.exceptions.PersistenceException: \n### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.\n### The error may exist in file [/Users/wy/learn/java_wiki/wiki/target/classes/mapper/TestMapper.xml]\n### The error may involve com.tongcheng.wiki.mapper.TestMapper.list\n### The error occurred while executing a query\n### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.\n\tat org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)\n\tat org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:149)\n\tat org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\n\tat sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\n\tat java.lang.reflect.Method.invoke(Method.java:498)\n\tat org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:426)\n\t... 59 more\nCaused by: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.\n\tat org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:82)\n\tat org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:80)\n\tat org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:67)\n\tat org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:337)\n\tat org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:86)\n\tat org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:62)\n\tat org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:325)\n\tat org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156)\n\tat org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109)\n\tat org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:89)\n\tat org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:147)\n\t... 65 more\nCaused by: java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.\n\tat com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:110)\n\tat com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)\n\tat com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89)\n\tat com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63)\n\tat com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:73)\n\tat com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:906)\n\tat com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:831)\n\tat com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456)\n\tat com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246)\n\tat com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:198)\n\tat com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138)\n\tat com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:358)\n\tat com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206)\n\tat com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:477)\n\tat com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:560)\n\tat com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115)\n\tat com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112)\n\tat org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:158)\n\tat org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:116)\n\tat org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:79)\n\t... 75 more\nCaused by: com.mysql.cj.exceptions.CJException: Access denied for user 'wiki@localhost'@'123.127.48.194' (using password: YES)\n\tat sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)\n\tat sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)\n\tat sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)\n\tat java.lang.reflect.Constructor.newInstance(Constructor.java:423)\n\tat com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)\n\tat com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105)\n\tat com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151)\n\tat com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:129)\n\tat com.mysql.cj.protocol.a.NativeProtocol.checkErrorMessage(NativeProtocol.java:792)\n\tat com.mysql.cj.protocol.a.NativeProtocol.checkErrorMessage(NativeProtocol.java:717)\n\tat com.mysql.cj.protocol.a.NativeProtocol.checkErrorMessage(NativeProtocol.java:685)\n\tat com.mysql.cj.protocol.a.NativeProtocol.checkErrorMessage(NativeProtocol.java:134)\n\tat com.mysql.cj.protocol.a.NativeAuthenticationProvider.proceedHandshakeWithPluggableAuthentication(NativeAuthenticationProvider.java:469)\n\tat com.mysql.cj.protocol.a.NativeAuthenticationProvider.connect(NativeAuthenticationProvider.java:174)\n\tat com.mysql.cj.protocol.a.NativeProtocol.connect(NativeProtocol.java:1348)\n\tat com.mysql.cj.NativeSession.connect(NativeSession.java:157)\n\tat com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:850)\n\t... 89 more\n",
"message": "nested exception is org.apache.ibatis.exceptions.PersistenceException: \n### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.\n### The error may exist in file [/Users/wy/learn/java_wiki/wiki/target/classes/mapper/TestMapper.xml]\n### The error may involve com.tongcheng.wiki.mapper.TestMapper.list\n### The error occurred while executing a query\n### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.",
"path": "/test/list"
}
```
java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.
012022-07-25
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