这是我的连接设置: Connection conn = DriverManager。getConnection(url + dbName + "?useUnicode=true&characterEncoding=utf-8"，用户名，密码);
我得到以下错误时轮胎添加一行到一个表: 错误的字符串值:'\xF0\x90\x8D\x83\xF0\x90…在第1行为“content”列
我插入数千条记录，当文本包含\xF0时，我总是得到这个错误(即不正确的字符串值总是以\xF0开始)。
列的排序规则是utf8_general_ci。
有什么问题吗?
当前回答
只做
ALTER TABLE `some_table`
CHARACTER SET = utf8 , COLLATE = utf8_general_ci ;
ALTER TABLE `some_table`
CHANGE COLUMN `description_with_latin_or_something` `description` TEXT CHARACTER SET 'utf8' NOT NULL ;
其他回答
我的PLAY Java应用程序有这个问题。这是我对该异常的堆栈跟踪:
javax.persistence.PersistenceException: Error[Incorrect string value: '\xE0\xA6\xAC\xE0\xA6\xBE...' for column 'product_name' at row 1]
at io.ebean.config.dbplatform.SqlCodeTranslator.translate(SqlCodeTranslator.java:52)
at io.ebean.config.dbplatform.DatabasePlatform.translate(DatabasePlatform.java:192)
at io.ebeaninternal.server.persist.dml.DmlBeanPersister.execute(DmlBeanPersister.java:83)
at io.ebeaninternal.server.persist.dml.DmlBeanPersister.insert(DmlBeanPersister.java:49)
at io.ebeaninternal.server.core.PersistRequestBean.executeInsert(PersistRequestBean.java:1136)
at io.ebeaninternal.server.core.PersistRequestBean.executeNow(PersistRequestBean.java:723)
at io.ebeaninternal.server.core.PersistRequestBean.executeNoBatch(PersistRequestBean.java:778)
at io.ebeaninternal.server.core.PersistRequestBean.executeOrQueue(PersistRequestBean.java:769)
at io.ebeaninternal.server.persist.DefaultPersister.insert(DefaultPersister.java:456)
at io.ebeaninternal.server.persist.DefaultPersister.insert(DefaultPersister.java:406)
at io.ebeaninternal.server.persist.DefaultPersister.save(DefaultPersister.java:393)
at io.ebeaninternal.server.core.DefaultServer.save(DefaultServer.java:1602)
at io.ebeaninternal.server.core.DefaultServer.save(DefaultServer.java:1594)
at io.ebean.Model.save(Model.java:190)
at models.Product.create(Product.java:147)
at controllers.PushData.xlsupload(PushData.java:67)
at router.Routes$$anonfun$routes$1.$anonfun$applyOrElse$40(Routes.scala:690)
at play.core.routing.HandlerInvokerFactory$$anon$3.resultCall(HandlerInvoker.scala:134)
at play.core.routing.HandlerInvokerFactory$$anon$3.resultCall(HandlerInvoker.scala:133)
at play.core.routing.HandlerInvokerFactory$JavaActionInvokerFactory$$anon$8$$anon$2$$anon$1.invocation(HandlerInvoker.scala:108)
at play.core.j.JavaAction$$anon$1.call(JavaAction.scala:88)
at play.http.DefaultActionCreator$1.call(DefaultActionCreator.java:31)
at play.core.j.JavaAction.$anonfun$apply$8(JavaAction.scala:138)
at scala.concurrent.Future$.$anonfun$apply$1(Future.scala:655)
at scala.util.Success.$anonfun$map$1(Try.scala:251)
at scala.util.Success.map(Try.scala:209)
at scala.concurrent.Future.$anonfun$map$1(Future.scala:289)
at scala.concurrent.impl.Promise.liftedTree1$1(Promise.scala:29)
at scala.concurrent.impl.Promise.$anonfun$transform$1(Promise.scala:29)
at scala.concurrent.impl.CallbackRunnable.run$$$capture(Promise.scala:60)
at scala.concurrent.impl.CallbackRunnable.run(Promise.scala)
at play.core.j.HttpExecutionContext$$anon$2.run(HttpExecutionContext.scala:56)
at play.api.libs.streams.Execution$trampoline$.execute(Execution.scala:70)
at play.core.j.HttpExecutionContext.execute(HttpExecutionContext.scala:48)
at scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:68)
at scala.concurrent.impl.Promise$KeptPromise$Kept.onComplete(Promise.scala:368)
at scala.concurrent.impl.Promise$KeptPromise$Kept.onComplete$(Promise.scala:367)
at scala.concurrent.impl.Promise$KeptPromise$Successful.onComplete(Promise.scala:375)
at scala.concurrent.impl.Promise.transform(Promise.scala:29)
at scala.concurrent.impl.Promise.transform$(Promise.scala:27)
at scala.concurrent.impl.Promise$KeptPromise$Successful.transform(Promise.scala:375)
at scala.concurrent.Future.map(Future.scala:289)
at scala.concurrent.Future.map$(Future.scala:289)
at scala.concurrent.impl.Promise$KeptPromise$Successful.map(Promise.scala:375)
at scala.concurrent.Future$.apply(Future.scala:655)
at play.core.j.JavaAction.apply(JavaAction.scala:138)
at play.api.mvc.Action.$anonfun$apply$2(Action.scala:96)
at scala.concurrent.Future.$anonfun$flatMap$1(Future.scala:304)
at scala.concurrent.impl.Promise.$anonfun$transformWith$1(Promise.scala:37)
at scala.concurrent.impl.CallbackRunnable.run$$$capture(Promise.scala:60)
at scala.concurrent.impl.CallbackRunnable.run(Promise.scala)
at akka.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:55)
at akka.dispatch.BatchingExecutor$BlockableBatch.$anonfun$run$1(BatchingExecutor.scala:91)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
at scala.concurrent.BlockContext$.withBlockContext(BlockContext.scala:81)
at akka.dispatch.BatchingExecutor$BlockableBatch.run(BatchingExecutor.scala:91)
at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:40)
at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(ForkJoinExecutorConfigurator.scala:43)
at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Caused by: java.sql.SQLException: Incorrect string value: '\xE0\xA6\xAC\xE0\xA6\xBE...' for column 'product_name' at row 1
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4096)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4028)
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:2734)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2458)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2375)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2359)
at com.zaxxer.hikari.pool.ProxyPreparedStatement.executeUpdate(ProxyPreparedStatement.java:61)
at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.executeUpdate(HikariProxyPreparedStatement.java)
at io.ebeaninternal.server.type.DataBind.executeUpdate(DataBind.java:82)
at io.ebeaninternal.server.persist.dml.InsertHandler.execute(InsertHandler.java:122)
at io.ebeaninternal.server.persist.dml.DmlBeanPersister.execute(DmlBeanPersister.java:73)
... 59 more
我想用io.Ebean保存一条记录。我通过使用utf8mb4排序规则重新创建我的数据库来修复它，并应用play evolution重新创建所有表，以便所有表都应该使用utf-8排序规则重新创建。
CREATE DATABASE inventory CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
我想结合几篇文章来完整地回答这个问题，因为它看起来确实是几个步骤。
以上建议来自@madtracey
-等一下-等一下
[mysql]
default-character-set=utf8mb4
[mysqld_safe]
socket = /var/run/mysqld/mysqld.sock
nice = 0
[mysqld]
##
character-set-server=utf8mb4
collation-server=utf8mb4_unicode_ci
init_connect='SET NAMES utf8mb4'
sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
同样，从上面的建议来看，所有jdbc连接都从它们中删除了characterEncoding=UTF-8和characterSetResults=UTF-8
使用这个set -Dfile。encoding=UTF-8似乎没有什么区别。
我仍然不能写入国际文本到db得到同样的失败，如上所述
现在使用这个如何将整个mysql数据库字符集和排序规则转换为utf-8
更新所有的数据库，使用utf8mb4
ALTER DATABASE YOURDB CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
运行这个查询，它将为您提供需要调用的内容
SELECT CONCAT(
'ALTER TABLE ', table_name, ' CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci; ',
'ALTER TABLE ', table_name, ' CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci; ')
FROM information_schema.TABLES AS T, information_schema.`COLLATION_CHARACTER_SET_APPLICABILITY` AS C
WHERE C.collation_name = T.table_collation
AND T.table_schema = 'YOURDB'
AND
(C.CHARACTER_SET_NAME != 'utf8mb4'
OR
C.COLLATION_NAME not like 'utf8mb4%')
在编辑器中复制粘贴输出，当连接到正确的db时，将所有|替换为无post回mysql。
这就是我要做的一切，而且似乎对我很有效。不是-Dfile。encoding=UTF-8未启用，它似乎按预期工作
还有问题吗? 我当然是在生产中，所以事实证明你确实需要检查上面所做的事情，因为它有时不起作用，这里是原因和解决方案:
show create table user
`password` varchar(255) CHARACTER SET latin1 NOT NULL,
`username` varchar(255) CHARACTER SET latin1 NOT NULL,
你可以看到一些仍然是拉丁文 试图手动更新记录:
ALTER TABLE user CONVERT TO CHARACTER SET utf8mb4;
ERROR 1071 (42000): Specified key was too long; max key length is 767 bytes
让我们缩小范围:
mysql> ALTER TABLE user change username username varchar(255) CHARACTER SET utf8mb4 not NULL;
ERROR 1071 (42000): Specified key was too long; max key length is 767 bytes
mysql> ALTER TABLE user change username username varchar(100) CHARACTER SET utf8mb4 not NULL;
Query OK, 5 rows affected (0.01 sec)
简而言之，为了让更新工作，我必须减小字段的大小。
现在当我跑步的时候:
mysql> ALTER TABLE user CONVERT TO CHARACTER SET utf8mb4;
Query OK, 5 rows affected (0.01 sec)
Records: 5 Duplicates: 0 Warnings: 0
都能正常工作
提示:在AWS RDS上，你需要一个新的参数组为你的MySQL数据库的参数(而不是编辑my.cnf)
collation_connection: utf8mb4_unicode_ci collation_database: utf8mb4_unicode_ci collation_server: utf8mb4_unicode_ci character_set_client: utf8mb4 character_set_connection: utf8mb4 character_set_database: utf8mb4 character_set_results: utf8mb4 character_set_server: utf8mb4
注意:character_set_system保持“utf8”
这些SQL命令不会永久工作-只在会话中:
set character_set_server = utf8mb4;
set collation_server = utf8mb4_unicode_ci;
如果您正在创建一个新的MySQL表，您可以在创建时指定所有列的字符集，这为我解决了这个问题。
CREATE TABLE tablename (
<list-of-columns>
)
CHARSET SET utf8mb4 COLLATE utf8mb4_unicode_ci;
你可以阅读更多详细信息:https://dev.mysql.com/doc/refman/8.0/en/charset-column.html
只做
ALTER TABLE `some_table`
CHARACTER SET = utf8 , COLLATE = utf8_general_ci ;
ALTER TABLE `some_table`
CHANGE COLUMN `description_with_latin_or_something` `description` TEXT CHARACTER SET 'utf8' NOT NULL ;
