未找到MySQL JDBC驱动程序错误。 在课程路径中，已验证

Question

I can't get the Java MySQL Connector to connect to MySQL for the life of me... I installed it both via apt-get and downloading the JAR to a "Dependencies" folder inside my Java package I am building.

javac -cp ./Dependencies/mysql-connector-java-5.1.43-bin.jar:/usr/share/java/* -source 1.8 -target 1.8 -d . SDUtils/*.java
added manifest
adding: Build.sh(in = 158) (out= 119)(deflated 24%)
adding: Dependencies/(in = 0) (out= 0)(stored 0%)
adding: Dependencies/mysql-connector-java-5.1.43-bin.jar(in = 999018) (out= 950443)(deflated 4%)
adding: Legacy/(in = 0) (out= 0)(stored 0%)
adding: Legacy/SD-Utils.py(in = 3576) (out= 1268)(deflated 64%)
adding: SDUtils/(in = 0) (out= 0)(stored 0%)
adding: SDUtils/dbConnector.java(in = 729) (out= 402)(deflated 44%)
adding: SDUtils/SDUtils.java(in = 4091) (out= 1589)(deflated 61%)
adding: SDUtils/dbConnector.class(in = 1299) (out= 769)(deflated 40%)
adding: SDUtils/SDUtils.class(in = 2574) (out= 1568)(deflated 39%)

Result of running SDUtils/dbConnector:

Where is your MySQL JDBC Driver?
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:264)
    at SDUtils.dbConnector.main(dbConnector.java:9)

Source:

package SDUtils;

import java.sql.*;

public class dbConnector {

    public static void main (String[] args) {

        try { Class.forName("com.mysql.jdbc.Driver"); }

        catch (ClassNotFoundException e) {

            System.out.println("Where is your MySQL JDBC Driver?");
            e.printStackTrace();
            return;

        }

        String dbUrl = "jdbc:mysql://localhost:3306/Core";
        String uName = "MyUser";
        String uPass = "MyPass";

        System.out.println("Connecting database...");

        try {
            Connection con = DriverManager.getConnection(dbUrl, uName, uPass);
            System.out.println("Database connected! (Core)");
        }

        catch (SQLException err) { System.out.println(err.getMessage()); }
        catch (Exception e) { System.out.println(e); }

    }

}

Result of ps -aux | grep mysql:

mysql     2929  0.1  1.8 2310936 602096 ?      Ssl  15:43   0:40 /usr/sbin/mysqld
astump   22480  0.0  0.0  14240   948 pts/3    S+   22:20   0:00 grep --color=auto mysql

Answer 1

This exception is due to the jar missing in the class path. You need to specify the jar path in the classpath while running the program using "java" command also to resolve this.

Answer 2

So I actually figured the real problem out. I was using mysql-connector-java-5.1.43-bin.jar -- I should have been using the one without the -bin in it.