遇到這種問題， 是你的數(shù)據(jù)庫表那個(gè)字段設(shè)置了唯一索引。所以這個(gè)字段新增的數(shù)據(jù)不能重復(fù)。具體可以打開表，然后點(diǎn)擊表設(shè)置，具體教程可以看下文章最后

Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '測(cè)試' for key 'teacher.uk_name'
?? ?at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
?? ?at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
?? ?at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
?? ?at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
?? ?at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
?? ?at com.mysql.jdbc.Util.getInstance(Util.java:408)
?? ?at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:936)
?? ?at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3976)
?? ?at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3912)
?? ?at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2530)
?? ?at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2683)
?? ?at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2486)
?? ?at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1858)
?? ?at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1197)
?? ?at com.zaxxer.hikari.pool.ProxyPreparedStatement.execute(ProxyPreparedStatement.java:44)
?? ?at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.execute(HikariProxyPreparedStatement.java)
?? ?at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
?? ?at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
?? ?at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
?? ?at java.lang.reflect.Method.invoke(Method.java:498)
?? ?at org.apache.ibatis.logging.jdbc.PreparedStatementLogger.invoke(PreparedStatementLogger.java:59)
?? ?at com.sun.proxy.$Proxy118.execute(Unknown Source)
?? ?at org.apache.ibatis.executor.statement.PreparedStatementHandler.update(PreparedStatementHandler.java:47)
?? ?at org.apache.ibatis.executor.statement.RoutingStatementHandler.update(RoutingStatementHandler.java:74)
?? ?at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
?? ?at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
?? ?at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
?? ?at java.lang.reflect.Method.invoke(Method.java:498)
?? ?at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:63)
?? ?at com.sun.proxy.$Proxy116.update(Unknown Source)
?? ?at com.baomidou.mybatisplus.core.executor.MybatisSimpleExecutor.doUpdate(MybatisSimpleExecutor.java:54)
?? ?at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117)
?? ?at com.baomidou.mybatisplus.core.executor.MybatisCachingExecutor.update(MybatisCachingExecutor.java:83)
?? ?at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:197)
?? ?at org.apache.ibatis.session.defaults.DefaultSqlSession.insert(DefaultSqlSession.java:184)
?? ?at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
?? ?at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
?? ?at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
?? ?at java.lang.reflect.Method.invoke(Method.java:498)
?? ?at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:426)
?? ?... 61 more

點(diǎn)擊表設(shè)置查看索引

?

這下明白了把。一般不建議改這個(gè)唯一索引，畢竟當(dāng)初這樣設(shè)計(jì)肯定有這樣設(shè)計(jì)的原因的。只要在前端給用戶反饋一個(gè) 重復(fù) 的說明就行了?文章來源地址http://www.zghlxwxcb.cn/news/detail-411849.html

到了這里，關(guān)于報(bào)錯(cuò)Duplicate entry ‘值‘ for key ‘字段名‘的解決解決方法的文章就介紹完了。如果您還想了解更多內(nèi)容，請(qǐng)?jiān)谟疑辖撬阉鱐OY模板網(wǎng)以前的文章或繼續(xù)瀏覽下面的相關(guān)文章，希望大家以后多多支持TOY模板網(wǎng)！