mysql驱动包导入报错_导入了mysql驱动包按老师说的打了一次，琢磨好久还是报错，求救...

忘是亡心i 2022-10-31 13:40 78阅读 0赞

com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:

\*\* BEGIN NESTED EXCEPTION \*\*

com.mysql.jdbc.CommunicationsException

MESSAGE: Communications link failure due to underlying exception:

\*\* BEGIN NESTED EXCEPTION \*\*

java.io.EOFException

MESSAGE: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.

STACKTRACE:

java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.

at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1997)

at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2411)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2916)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:885)

at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1300)

at com.mysql.jdbc.Connection.createNewIO(Connection.java:2775)

at com.mysql.jdbc.Connection.(Connection.java:1555)

at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:285)

at java.sql.DriverManager.getConnection(DriverManager.java:571)

at java.sql.DriverManager.getConnection(DriverManager.java:215)

at DButil.DButil.main(DButil.java:20)

\*\* END NESTED EXCEPTION \*\*

Last packet sent to the server was 7 ms ago.

STACKTRACE:

com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:

\*\* BEGIN NESTED EXCEPTION \*\*

java.io.EOFException

MESSAGE: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.

STACKTRACE:

java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.

at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1997)

at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2411)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2916)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:885)

at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1300)

at com.mysql.jdbc.Connection.createNewIO(Connection.java:2775)

at com.mysql.jdbc.Connection.(Connection.java:1555)

at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:285)

at java.sql.DriverManager.getConnection(DriverManager.java:571)

at java.sql.DriverManager.getConnection(DriverManager.java:215)

at DButil.DButil.main(DButil.java:20)

\*\* END NESTED EXCEPTION \*\*

Last packet sent to the server was 7 ms ago.

at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2622)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2916)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:885)

at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1300)

at com.mysql.jdbc.Connection.createNewIO(Connection.java:2775)

at com.mysql.jdbc.Connection.(Connection.java:1555)

at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:285)

at java.sql.DriverManager.getConnection(DriverManager.java:571)

at java.sql.DriverManager.getConnection(DriverManager.java:215)

at DButil.DButil.main(DButil.java:20)

\*\* END NESTED EXCEPTION \*\*

Last packet sent to the server was 7 ms ago.

at com.mysql.jdbc.Connection.createNewIO(Connection.java:2847)

at com.mysql.jdbc.Connection.(Connection.java:1555)

at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:285)

at java.sql.DriverManager.getConnection(DriverManager.java:571)

at java.sql.DriverManager.getConnection(DriverManager.java:215)

at DButil.DButil.main(DButil.java:20)

![095706dc84ea303206a6713575f79b4e.png][]

[095706dc84ea303206a6713575f79b4e.png]: /images/20221024/2d55c204992f42baa743fdf02ef08a9f.png

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