链接数据库出错了,不知道怎么回事??
我在index.jsp上写了一个表单

Java code

    <form action="/jdbc/servlet/Jdbc" method="post">
    ID<input type="text" name="id">
    NAME<input type="text" name="user">
    <input type="submit" value="submit">
    </form>

点击提交后转到jdbc这个servlet中处理数据库的插入:

Java code

        String id=request.getParameter("id");
        String name=request.getParameter("user");
        String db="com.mysql.jdbc.Driver";
        String dbName="jdbc:mysql://localhost:3306/student";
        String dbUser="root",dbPass="itelly";
        String sql="INSERT INTO STUDENT VALUES("+id+","+name+")";
        Connection connection=null;
        Statement statement=null;
        try {
            Class.forName(db);
            connection=DriverManager.getConnection(dbName, dbUser, dbPass);
            statement=connection.createStatement();
            statement.executeUpdate(sql);
            
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally{
            try {
                statement.close();
                connection.close();
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            
            
        }

可是执行后数据库里面怎么没有插入成功呢?
ps.我这个数据库.用户名.密码都是正确的.

myeclipse提示:
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'adf' in 'field list'
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.Util.getInstance(Util.java:386)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1052)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4096)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4028)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2490)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2651)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2677)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1748)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1665)
at com.haolly.Jdbc.doPost(Jdbc.java:101)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invok