Data too long for column

com.mysql.jdbc.MysqlDataTruncation: Data truncation: Data too long for column 'uName' at row 1
 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4096)
 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4030)
 at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2490)
 at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2651)
 at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2671)
 at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1749)
 at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1666)
 at org.apache.tomcat.dbcp.dbcp.DelegatingStatement.executeUpdate(DelegatingStatement.java:228)
 at database.DataBase.upData(DataBase.java:50)
 at userdaoimpl.UserDaoImpl.add(UserDaoImpl.java:19)
 at userdata.User.newUser(User.java:41)
 at zhuceservlet.ZhuCeServlet.doPost(ZhuCeServlet.java:27)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
 at java.lang.Thread.run(Thread.java:619)

表单提交的数据长度大于数据库表中定义的字段值长度。如数据库表中定义的name varchar（10）。但是在提交表单的时候输入数据长度大于10。修改方法：把字段值长度改大就可以了。