JDBC 连接中可能出现的问题是什么答案

【问题标题】：What would be the possible issue in the JDBC connectionJDBC 连接中可能出现的问题是什么
【发布时间】：2014-06-27 17:15:29
【问题描述】：

我试图在 Eclipse JEE 中连接 mysql 数据库。我尝试使用数据库透视图创建连接。数据库连接->新建->mysql。当我检查连接时，它给出了这些详细信息的连接失败

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown database 'database'
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)
    at com.mysql.jdbc.Util.getInstance(Util.java:384)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1052)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4232)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4164)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:926)
    at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1748)
    at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1288)
    at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2506)
    at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2539)
    at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2321)
    at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:832)
    at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)
    at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:417)
    at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:344)
    at org.eclipse.datatools.connectivity.drivers.jdbc.JDBCConnection.createConnection(JDBCConnection.java:213)
    at org.eclipse.datatools.connectivity.DriverConnectionBase.internalCreateConnection(DriverConnectionBase.java:105)
    at org.eclipse.datatools.connectivity.DriverConnectionBase.open(DriverConnectionBase.java:54)
    at org.eclipse.datatools.connectivity.drivers.jdbc.JDBCConnection.open(JDBCConnection.java:73)
    at org.eclipse.datatools.enablement.internal.mysql.connection.JDBCMySQLConnectionFactory.createConnection(JDBCMySQLConnectionFactory.java:28)
    at org.eclipse.datatools.connectivity.internal.ConnectionFactoryProvider.createConnection(ConnectionFactoryProvider.java:83)
    at org.eclipse.datatools.connectivity.internal.ConnectionProfile.createConnection(ConnectionProfile.java:358)
    at org.eclipse.datatools.connectivity.ui.PingJob.createTestConnection(PingJob.java:76)
    at org.eclipse.datatools.connectivity.ui.PingJob.run(PingJob.java:59)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

【问题讨论】：

连接字符串是什么？
请使用代码格式，这样我们就不会看到一个巨大的 blob。
@user3621844 欢迎来到StackOverFlow :)

标签： java mysql jdbc

【解决方案1】：

来自堆栈跟踪：

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException：未知数据库“数据库”

您似乎忘记更改数据库的名称。

查看您的连接字符串：

java:mysql://<server>:<port>/<database_name>
                             ^ change this for a real database in your MySQL server

【讨论】：