Caused by: java.sql.DataTruncation: Data truncation

Caused by: java.sql.DataTruncation: Data truncation

at net.sourceforge.jtds.jdbc.SQLDiagnostic.addDiagnostic(SQLDiagnostic.java:386) [jtds-1.2.7.jar:1.2.7]
at net.sourceforge.jtds.jdbc.TdsCore.tdsErrorToken(TdsCore.java:2886) [jtds-1.2.7.jar:1.2.7]
at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2328) [jtds-1.2.7.jar:1.2.7]
at net.sourceforge.jtds.jdbc.TdsCore.getMoreResults(TdsCore.java:638) [jtds-1.2.7.jar:1.2.7]
at net.sourceforge.jtds.jdbc.JtdsStatement.processResults(JtdsStatement.java:614) [jtds-1.2.7.jar:1.2.7]
at net.sourceforge.jtds.jdbc.JtdsStatement.executeSQL(JtdsStatement.java:573) [jtds-1.2.7.jar:1.2.7]
at net.sourceforge.jtds.jdbc.JtdsPreparedStatement.execute(JtdsPreparedStatement.java:761) [jtds-1.2.7.jar:1.2.7]
at com.alibaba.druid.filter.FilterChainImpl.preparedStatement_execute(FilterChainImpl.java:2931) [druid-1.0.12.jar:1.0.12]
at com.alibaba.druid.filter.FilterEventAdapter.preparedStatement_execute(FilterEventAdapter.java:440) [druid-1.0.12.jar:1.0.12]
at com.alibaba.druid.filter.FilterChainImpl.preparedStatement_execute(FilterChainImpl.java:2929) [druid-1.0.12.jar:1.0.12]
at com.alibaba.druid.proxy.jdbc.PreparedStatementProxyImpl.execute(PreparedStatementProxyImpl.java:118) [druid-1.0.12.jar:1.0.12]
at com.alibaba.druid.pool.DruidPooledPreparedStatement.execute(DruidPooledPreparedStatement.java:493) [druid-1.0.12.jar:1.0.12]
at org.apache.ibatis.executor.statement.PreparedStatementHandler.update(PreparedStatementHandler.java:44) [mybatis-3.2.8.jar:3.2.8]
at org.apache.ibatis.executor.statement.RoutingStatementHandler.update(RoutingStatementHandler.java:69) [mybatis-3.2.8.jar:3.2.8]

出现问题原因：保存的数据中有中文但是 数据库用varchar;导致数据过长 报错，  (程序中判断不出包含中英文的实际长度或比较麻烦)

解决方案：如果包含中文 用nchar/nvarchar，如果纯英文和数字，用char/varchar。