servlet实现密码修改功能

package org.zwd.alterpassword.servlet;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.chinamobile.ConnectDB;
Connection conn=userDB.getConn（）;
public class EditPasswordServlet extends HttpServlet{	
	public void doGet（HttpServletRequest reqHttpServletResponse resp）{
		   this.doPost（reqresp）;
		}
public void doPost（HttpServletRequest reqHttpServletResponse resp）{
			try{				 String wt=（String）session.getAttribute（“number“）;
							 resp.setContentType（“text ml;charset=gb2312“）