java.sql.SQLException:java.lang.ClassCastException:java.math.BigInteger不能转换为java.lang.Long

我试图将一个数据库连接到我的Java程序，然后 我得到了错误

May 28, 2018 9:26:40 PM com.example.test main
SEVERE: null
java.sql.SQLException: java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:988)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:974)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:919)
    at com.mysql.jdbc.ConnectionImpl.buildCollationMapping(ConnectionImpl.java:1062)
    at com.mysql.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:3556)
    at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2513)
    at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2283)
    at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:822)
    at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
    at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:404)
    at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:317)
    at java.sql.DriverManager.getConnection(DriverManager.java:664)
    at java.sql.DriverManager.getConnection(DriverManager.java:247)
    at com.example.test.main(test.java:13)
Caused by: java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long
    at com.mysql.jdbc.ConnectionImpl.buildCollationMapping(ConnectionImpl.java:1007)
    ... 15 more cast to java.lang.Long

我什么都试过了，却找不到解决办法。提前谢谢你的帮助

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我认为这是你的问题。请验证mysql连接器jar是否位于类路径上

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如果您使用的是maven，请检查pom中的mysql连接器java工件。

什么是驱动程序版本？还有mysql服务器版本？驱动程序版本和mysql版本是什么？它会给出classnotfoundexception，而不是强制转换问题。

package com.example;

import java.sql.*;
import java.util.logging.Level;
import java.util.logging.Logger;

public class test {

    public static void main(String[] args) {

        try {
            Class.forName("com.mysql.jdbc.Driver");
            Connection c;
            c = DriverManager.getConnection("jdbc:mysql://localhost:3306/company", "root", "root");
            c.close();
        } catch (ClassNotFoundException | SQLException ex) {
            Logger.getLogger(test.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}