com.mysql.jdbc.MysqlDataTruncation:Data Truncation:Data too long for column '字段name' at row 1

1.問題描述：

　　在mysql插入數據的時候報錯：Cause: com.mysql.jdbc.MysqlDataTruncation: Data truncation: Data too long for column 'xxx_name' at row 1

嚴重: Servlet.service() for servlet default threw exceptio
com.mysql.jdbc.MysqlDataTruncation: Data truncation: Data too long for column 'xxx_name' at row 1
 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2868)
 at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1573)   
 at com.mysql.jdbc.ServerPreparedStatement.serverExecute(ServerPreparedStatement.java:1160)
 at com.mysql.jdbc.ServerPreparedStatement.executeInternal(ServerPreparedStatement.java:685)
 at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1400)
 at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1314)
 at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1299)
 at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeUpdate(NewProxyPreparedStatement.java:105)
 at org.springframework.jdbc.core.JdbcTemplate$2.doInPreparedStatement(JdbcTemplate.java:745)
 at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:538)
 at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:739)
 at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:797)
 at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:805)
 at com.bester.blog.dao.impl.UserDAOImpl.add(UserDAOImpl.java:25)
 at com.bester.blog.service.impl.UserServiceImpl.add(UserServiceImpl.java:12)
 at com.bester.blog.web.action.UserAction.add(UserAction.java:30)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:597)

2.問題分析：

　　從字面意思看，是字段長度不夠。即使設置為了text還是不夠，因為text類型是可變長度的字符串，最多65535個字符，所有，最好是把字段類型設置為longtext，最多存放4294967295個字符

　　步驟：進入mysql，use你要改變的數據庫，執行語句：alter table testTable modify column xxx_name longtext;

　　重啟mysql，linux下語句：service mysqld restart

　　但是，我的xxx_name字段設置的是varchar(50)，而輸入的沒幾個字；

　　原因在於：建表的時候，表的編碼和字段編碼都是默認的latin1，設置為utf8后，問題解決。修改utf-8編碼