我正在使用JDBC,並且新增了它。但我不斷收到此運行時異常:jdbc中的未知數據庫
connecting to psysical database...
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown database 'kholofelodb'
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.Util.getInstance(Util.java:386)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1052)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3609)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3541)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:943)
at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:4113)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1308)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2336)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2369)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2153)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:792)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:381)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:305)
at java.sql.DriverManager.getConnection(DriverManager.java:579)
at java.sql.DriverManager.getConnection(DriverManager.java:221)
at com.psybergate.database.SimbleCode.main(SimbleCode.java:22)
這裏是給代碼
try {
String connectionURL = "jdbc:mysql://localhost:3306/kholofelodb";
Class.forName("com.mysql.jdbc.Driver");
System.out.println("connecting to psysical database...");
Connection conn = DriverManager.getConnection(connectionURL, USER,
PASS);
Statement statement = conn.createStatement();
System.out.println("Connection has been made");
Scanner keyBoardScanner = new Scanner(System.in);
System.out.println("Enter table name:");
String tableName = keyBoardScanner.nextLine();
System.out.println("Creating table...");
statement.executeQuery("create table " + tableName
+ " (name , age ,salary)");
System.out.println("Table successfully created");
System.out.println("Inserting data into the table ...");
statement.executeUpdate("insert into " + tableName
+ "values (kholofelo , 21 , 9969696)");
}
我怎麼得到這個代碼工作?我只是一個JDBC初學者....
爲上述代碼; PASS =「passowrd」,USER =「根」
我曾與端口有問題,它是通過本網站固定
非常感謝
數據庫的名稱是什麼? – jlordo 2013-04-05 10:55:20
它告訴你它無法在MySQL中找到'kholofelodb' – 2013-04-05 10:56:14
你是否證實MySQL服務器正在本地機器上運行? – MikeD 2013-04-05 11:02:20