mysql连接问题

用JBUILDER 连MYSQL ,EXCEPTION
C:\JBuilderX\jdk1.4\bin\javaw -classpath "I:\testmysql\classes;F:\struts\data\lib\mysqldriver.jar;C:\JBuilderX\jdk1.4\demo\jfc\Java2D\Java2Demo.jar;C:\JBuilderX\jdk1.4\demo\plugin\jfc\Java2D\Java2Demo.jar;C:\JBuilderX\jdk1.4\jre\javaws\javaws.jar;C:\JBuilderX\jdk1.4\jre\lib\charsets.jar;C:\JBuilderX\jdk1.4\jre\lib\ext\dnsns.jar;C:\JBuilderX\jdk1.4\jre\lib\ext\ldapsec.jar;C:\JBuilderX\jdk1.4\jre\lib\ext\localedata.jar;C:\JBuilderX\jdk1.4\jre\lib\ext\sunjce_provider.jar;C:\JBuilderX\jdk1.4\jre\lib\im\indicim.jar;C:\JBuilderX\jdk1.4\jre\lib\im\thaiim.jar;C:\JBuilderX\jdk1.4\jre\lib\jce.jar;C:\JBuilderX\jdk1.4\jre\lib\jsse.jar;C:\JBuilderX\jdk1.4\jre\lib\plugin.jar;C:\JBuilderX\jdk1.4\jre\lib\rt.jar;C:\JBuilderX\jdk1.4\jre\lib\sunrsasign.jar;C:\JBuilderX\jdk1.4\lib\dt.jar;C:\JBuilderX\jdk1.4\lib\htmlconverter.jar;C:\JBuilderX\jdk1.4\lib\tools.jar"  testmysql.TestMysql 
java.sql.SQLException: Communication link failure: java.io.IOException, underlying cause: Unexpected end of input stream
** BEGIN NESTED EXCEPTION ** 
java.io.IOException
MESSAGE: Unexpected end of input stream
STACKTRACE:
java.io.IOException: Unexpected end of input stream
at com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:1096)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:626)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:1562)
at com.mysql.jdbc.Connection.<init>(Connection.java:491)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:346)
at java.sql.DriverManager.getConnection(DriverManager.java:512)
at java.sql.DriverManager.getConnection(DriverManager.java:171)
at testmysql.TestMysql.getSQLServerConnection(TestMysql.java:16)
at testmysql.TestMysql.main(TestMysql.java:23)
** END NESTED EXCEPTION **
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:699)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:1562)
at com.mysql.jdbc.Connection.<init>(Connection.java:491)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:346)
at java.sql.DriverManager.getConnection(DriverManager.java:512)
at java.sql.DriverManager.getConnection(DriverManager.java:171)
at testmysql.TestMysql.getSQLServerConnection(TestMysql.java:16)
at testmysql.TestMysql.main(TestMysql.java:23)