Java 找不到合适的司机

我有个错误

java.sql.SQLException: No suitable driver
at java.sql.DriverManager.getConnection(DriverManager.java:545)
at java.sql.DriverManager.getConnection(DriverManager.java:171)
at pack.ConnectionFactory.getConnect(ConnectionFactory.java:37)

String DriverClass=com.mysql.jdbc.Driver； 静态字符串url=jdbc:mysql://localhost:3306/dbqwe; 使用J2SE1.5、TOMCAT 6.0.36、MYSQL 5.5服务器和EclipseJuno

tried with mysql-connector-java-5.1.18-bin
mysql-connector-java-5.1.22.jar
mysql-connector-java-5.1.2.jar
mysql-connector-java-3.1.7-bin.jar
ojdbc14.jar

把它们放在

web-inf/lib, tomcat lib

及

将jar文件也添加到java构建路径中

知道我哪里出错了吗？

您需要在字符串url中提供用户名和密码

有关将JAVA与MySQL连接的详细信息，请访问以下链接：

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附言：你能发布你的全部代码吗？

你注册了你的司机吗？在DriverManager.getConnection之前，应该有

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

或

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如果此行在${CATALINA_HOME}/conf/server.xml中未注释：

<Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />

将其更改为：

<Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" driverManagerProtection="false" />

这将使Tomcat返回到6.0.35之前的功能，它在${CATALINA_HOME}/lib中正确注册了类型4 JDBC驱动程序

DriverManager.registerDriver(new com.mysql.jdbc.Driver());

    public class ConnectionFactory 
    {
      String DriverClass = "com.mysql.jdbc.Driver";
      static String url = "jdbc:mysql://localhost:3306/dbb";
       static String Userid = "root";
     static String Pwd = "pswd";
      StringBuffer output = new StringBuffer();
    ConnectionFactory cf = new ConnectionFactory(); 
     private ConnectionFactory()
{ try{ Class.forName(DriverClass);
     //output.append("Driver Installation Successful");
     System.out.println("Driver Installed"); }
 catch (ClassNotFoundException e)
    {e.printStackTrace();
    output.append("Driver Installation Failed");  }}
  public  static Connection getConnect() throws SQLException 
  {Connection con = DriverManager.getConnection(url, Userid, Pwd);
    return con;}}

<Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />

<Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" driverManagerProtection="false" />