JDBC Class.forName(“com.mysql.jdbc.Driver”)报错

JDBC

加载Class.forName(“com.mysql.jdbc.Driver”)报错

代码

package jdbc;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class JDBC3 {

	public static void main(String[] args) throws Exception{
		Class.forName("com.mysql.jdbc.Driver ");
		
		Connection c=DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/how2java?characterEncoding=UTF-8","root","admin");
		Statement s=c.createStatement();
		String sql="select count(*) from hero";
		ResultSet rs=s.executeQuery(sql);
		int i=0;
		while(rs.next()){
			i=rs.getInt(1);
		}
		System.out.println("表hero中共有："+i+"条数据");
		s.close();
		c.close();
	}

}

报错如下

Exception in thread “main” java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at java.net.URLClassLoader $1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at jdbc.JDBC3.main(JDBC3.java:13)

原因

Class.forName("com.mysql.jdbc.Driver ");

在Drive后面多按了了一个空格