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=========================================1.java==============================================================

if(flag.equals("addUser")){

//Íê³ÉÌí¼ÓÓû§
//µÃµ½Óû§ÊäÈëµÄÐÅÏ¢
String name=request.getParameter("useName");
String passwd=request.getParameter("passwd");
String email=request.getParameter("email");

//´´½¨userbeancl
UserBeanCl ubc=new UserBeanCl();

if(ubc.addUser(name, passwd, email)){

//Ìí¼Ó³É¹¦
request.getRequestDispatcher("suc.jsp").forward(request, response);

}else{
//²»³É¹¦
request.getRequestDispatcher("err.jsp").forward(request, response);
}


======================================================2.java===============================================

public boolean addUser(String name,String passwd,String email){

boolean b=false;
try{
//µÃµ½Á´½Ó
conn=new ConnDB().getConn();

st=conn.createStatement();
//Ö´ÐÐ
int a=st.executeUpdate("insert into user(uID,uPS,mail)values('"+name+"','"+passwd+"','"+email+"')");

if(a==1){
//Ìí¼Ó³É¹¦
b=true;
}

======================