1.连接mysql(正常可登陆)
2.连接oracle（一直说用户和密码错误登录不上）
3.连接sqlserver（tomcat启动时候就报错）
信息: Server startup in 21685 ms
2018-01-01 12:17:53,964 ERROR [com.alibaba.druid.pool.DruidDataSource] - create connection error, url: jdbc:jtds:sqlserver://localhost:1433/jeesite, errorCode 208, state S0002
java.sql.SQLException: 对象名 'DUAL' 无效。
at net.sourceforge.jtds.jdbc.SQLDiagnostic.addDiagnostic(SQLDiagnostic.java:372)
at net.sourceforge.jtds.jdbc.TdsCore.tdsErrorToken(TdsCore.java:2988)
at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2421)
at net.sourceforge.jtds.jdbc.TdsCore.getMoreResults(TdsCore.java:671)
at net.sourceforge.jtds.jdbc.JtdsStatement.executeSQLQuery(JtdsStatement.java:505)
at net.sourceforge.jtds.jdbc.JtdsStatement.executeQuery(JtdsStatement.java:1427)
at com.alibaba.druid.filter.FilterChainImpl.statement_executeQuery(FilterChainImpl.java:2363)
at com.alibaba.druid.filter.FilterAdapter.statement_executeQuery(FilterAdapter.java:2481)
at com.alibaba.druid.filter.FilterEventAdapter.statement_executeQuery(FilterEventAdapter.java:302)
at com.alibaba.druid.filter.FilterChainImpl.statement_executeQuery(FilterChainImpl.java:2360)
at com.alibaba.druid.proxy.jdbc.StatementProxyImpl.executeQuery(StatementProxyImpl.java:211)
at com.alibaba.druid.pool.DruidAbstractDataSource.validateConnection(DruidAbstractDataSource.java:1262)
at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1474)
at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:1969)
2018-01-01 12:17:54,347 ERROR [com.alibaba.druid.pool.DruidDataSource] - create connection error, url: jdbc:jtds:sqlserver://localhost:1433/jeesite, errorCode 208, state S0002
java.sql.SQLException: 对象名 'DUAL' 无效。
at net.sourceforge.jtds.jdbc.SQLDiagnostic.addDiagnostic(SQLDiagnostic.java:372)
at net.sourceforge.jtds.jdbc.TdsCore.tdsErrorToken(TdsCore.java:2988)
at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2421)
at net.sourceforge.jtds.jdbc.TdsCore.getMoreResults(TdsCore.java:671)
at net.sourceforge.jtds.jdbc.JtdsStatement.executeSQLQuery(JtdsStatement.java:505)
at net.sourceforge.jtds.jdbc.JtdsStatement.executeQuery(JtdsStatement.java:1427)
at com.alibaba.druid.filter.FilterChainImpl.statement_executeQuery(FilterChainImpl.java:2363)
at com.alibaba.druid.filter.FilterAdapter.statement_executeQuery(FilterAdapter.java:2481)
at com.alibaba.druid.filter.FilterEventAdapter.statement_executeQuery(FilterEventAdapter.java:302)
at com.alibaba.druid.filter.FilterChainImpl.statement_executeQuery(FilterChainImpl.java:2360)
at com.alibaba.druid.proxy.jdbc.StatementProxyImpl.executeQuery(StatementProxyImpl.java:211)
at com.alibaba.druid.pool.DruidAbstractDataSource.validateConnection(DruidAbstractDataSource.java:1262)
at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1474)
at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:1969)
2018-01-01 12:17:55,169 ERROR [com.alibaba.druid.pool.DruidDataSource] - create connection error, url: jdbc:jtds:sqlserver://localhost:1433/jeesite, errorCode 208, state S0002
java.sql.SQLException: 对象名 'DUAL' 无效。
at net.sourceforge.jtds.jdbc.SQLDiagnostic.addDiagnostic(SQLDiagnostic.java:372)
at net.sourceforge.jtds.jdbc.TdsCore.tdsErrorToken(TdsCore.java:2988)
at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2421)
at net.sourceforge.jtds.jdbc.TdsCore.getMoreResults(TdsCore.java:671)
at net.sourceforge.jtds.jdbc.JtdsStatement.executeSQLQuery(JtdsStatement.java:505)
at net.sourceforge.jtds.jdbc.JtdsStatement.executeQuery(JtdsStatement.java:1427)
at com.alibaba.druid.filter.FilterChainImpl.statement_executeQuery(FilterChainImpl.java:2363)
at com.alibaba.druid.filter.FilterAdapter.statement_executeQuery(FilterAdapter.java:2481)
at com.alibaba.druid.filter.FilterEventAdapter.statement_executeQuery(FilterEventAdapter.java:302)
at com.alibaba.druid.filter.FilterChainImpl.statement_executeQuery(FilterChainImpl.java:2360)
at com.alibaba.druid.proxy.jdbc.StatementProxyImpl.executeQuery(StatementProxyImpl.java:211)
at com.alibaba.druid.pool.DruidAbstractDataSource.validateConnection(DruidAbstractDataSource.java:1262)
at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1474)
at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:1969)
2018-01-01 12:17:55,438 ERROR [com.alibaba.druid.pool.DruidDataSource] - create connection error, url: jdbc:jtds:sqlserver://localhost:1433/jeesite, errorCode 208, state S0002
java.sql.SQLException: 对象名 'DUAL' 无效。
at net.sourceforge.jtds.jdbc.SQLDiagnostic.addDiagnostic(SQLDiagnostic.java:372)
at net.sourceforge.jtds.jdbc.TdsCore.tdsErrorToken(TdsCore.java:2988)
at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2421)
at net.sourceforge.jtds.jdbc.TdsCore.getMoreResults(TdsCore.java:671)
at net.sourceforge.jtds.jdbc.JtdsStatement.executeSQLQuery(JtdsStatement.java:505)
at net.sourceforge.jtds.jdbc.JtdsStatement.executeQuery(JtdsStatement.java:1427)
at com.alibaba.druid.filter.FilterChainImpl.statement_executeQuery(FilterChainImpl.java:2363)
at com.alibaba.druid.filter.FilterAdapter.statement_executeQuery(FilterAdapter.java:2481)
at com.alibaba.druid.filter.FilterEventAdapter.statement_executeQuery(FilterEventAdapter.java:302)
at com.alibaba.druid.filter.FilterChainImpl.statement_executeQuery(FilterChainImpl.java:2360)
at com.alibaba.druid.proxy.jdbc.StatementProxyImpl.executeQuery(StatementProxyImpl.java:211)
at com.alibaba.druid.pool.DruidAbstractDataSource.validateConnection(DruidAbstractDataSource.java:1262)
at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1474)
at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:1969)
2018-01-01 12:17:55,586 ERROR [com.alibaba.druid.pool.DruidDataSource] - create connection error, url: jdbc:jtds:sqlserver://localhost:1433/jeesite, errorCode 208, state S0002
java.sql.SQLException: 对象名 'DUAL' 无效。
at net.sourceforge.jtds.jdbc.SQLDiagnostic.addDiagnostic(SQLDiagnostic.java:372)
at net.sourceforge.jtds.jdbc.TdsCore.tdsErrorToken(TdsCore.java:2988)
请帮忙解决后2种数据库得问题，多谢
写回答
请修改jeesite.properties 中的 jdbc.testSql
数据库错了吧
数据库链接错了
dual是oracle默认的一个数据库，请检查配置未文件，如果连接了sqlserver是不存在dual的，是不是应该换为master?
你的jeesite在哪下载的？
<p>一楼正解。</p>
<p>jeesite.properties修改这一句。jdbc.testSql=SELECT 'x' #FROM DUAL</p>
<p>DruidDataSource datasource = new DruidDataSource();<br>
//配置不同类型数据库的检查语句
datasource.setValidationQuery(validationQuery);
自定义validationQuery变量
例如MYSQL： String validationQuery = "SELECT 1 FROM DUAL";
例如MSSQL： String validationQuery = "SELECT 1";
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