我有以下doGet()：

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

MysqlDataSource ds = new MysqlConnectionPoolDataSource();

ds.setServerName("localhost");

ds.setPort(3306);

ds.setUser("root");

ds.setPassword("");

try {

Connection connection = null ;

connection = ds.getConnection();

Statement statement = connection.createStatement();

// create the DB ..

statement.executeUpdate("CREATE DATABASE IF NOT EXISTS "

+"testSQLtable" ) ;

// use DB ..

statement.executeUpdate("USE testSQLtable") ;

// create table ...

statement.executeUpdate("DROP TABLE IF EXISTS account "

+"CREATE TABLE account ( "

+"accountNum INT( 11 ),"

+"dateCreated DATE NOT NULL,"

+"accountName TEXT,"

+"description TEXT,"

+"statusAccount TEXT,"

+"sumOfMoney INT( 11 ) NOT NULL DEFAULT 0 );" ) ;

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

创建DB的前两个executeUpdate并使用他工作正常.在运行时到达行statement.executeUpdate(“DROP TABLE IF EXISTS accounnt …..”它会引发异常 –

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'CREATE TABLE account ( accountNum INT( 11 ),dateCreated DATE NOT NULL,accountNa' at line 1

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:411)

at com.mysql.jdbc.Util.getInstance(Util.java:386)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1053)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4074)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4006)

at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2468)

at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2629)

at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2713)

at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1794)

at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1712)

at control.CreateDBinitialServlet.doGet(CreateDBinitialServlet.java:56)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1001)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)

at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)

at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

at java.lang.Thread.run(Unknown Source)