Mysql报错Duplicate entry '值' for key '字段名'如何解决

遇到这种问题， 是你的数据库表那个字段设置了唯一索引。所以这个字段新增的数据不能重复。具体可以打开表，然后点击表设置

Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '测试' 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

点击表设置查看索引