中国电视史旁白:java 怎么连 mysql

环境变量要怎么配，我下了mysql-connector-java-5.0.0-beta-bin.jar
运行时报错说:
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at tree.TryData.main(TryData.java:10)
我的代码是:

import java.sql.Connection; //第一行
import java.sql.DriverManager;
import java.sql.SQLException;
public class TryData{
public static void main(String[] args){
System.out.println("Hello World!");
try{
Class.forName("com.mysql.jdbc.Driver");
System.out.println("Success loading Mysql Driver!");//第10行
}catch(Exception e){
System.out.println("Error loading Mysql Driver!");
e.printStackTrace();
}
}
}