我想用ajax实现用户注册对用户名的验证,用dwr的模式
用java类对输入数据进行验证,然后通过dwr.xml配置,页面是JavaScript
java类代码:package com.yourcompany.dwr;import com.yourcompany.hibernate.POJO.Reader;
import com.yourcompany.hibernate.POJO.ReaderDAO;public class id_validate {
String id;
Reader reader = null;
ReaderDAO readerDao = null;
public int check(String id){
this.id = id;
if(id==null||id.equals("")||id.length()<4){
return 0;
}
if(!id.matches("^[a-zA-Z0-9]{1}[a-zA-Z0-9|-|_]{2-16}[a-zA-Z0-9]{1}$")){
return 1;
}
reader = (Reader)readerDao.findById(id);
if(reader==null){
return 2;
}else{
return 3;
}
}
}dwr.xml代码:
<!DOCTYPE dwr PUBLIC
"-//GetAhead Limited//DTD Direct Web Remoting 1.0//EN"
"http://www.getahead.ltd.uk/dwr/dwr10.dtd">
<dwr>
<allow>
<create javascript="registerDWR" creator="new">
<param name="class" value="com.yourcompany.dwr.id_validate"></param>
</create>
</allow>
</dwr>
页面的js代码该如何写,使java类的判断传到js,请大虾赐教!
用java类对输入数据进行验证,然后通过dwr.xml配置,页面是JavaScript
java类代码:package com.yourcompany.dwr;import com.yourcompany.hibernate.POJO.Reader;
import com.yourcompany.hibernate.POJO.ReaderDAO;public class id_validate {
String id;
Reader reader = null;
ReaderDAO readerDao = null;
public int check(String id){
this.id = id;
if(id==null||id.equals("")||id.length()<4){
return 0;
}
if(!id.matches("^[a-zA-Z0-9]{1}[a-zA-Z0-9|-|_]{2-16}[a-zA-Z0-9]{1}$")){
return 1;
}
reader = (Reader)readerDao.findById(id);
if(reader==null){
return 2;
}else{
return 3;
}
}
}dwr.xml代码:
<!DOCTYPE dwr PUBLIC
"-//GetAhead Limited//DTD Direct Web Remoting 1.0//EN"
"http://www.getahead.ltd.uk/dwr/dwr10.dtd">
<dwr>
<allow>
<create javascript="registerDWR" creator="new">
<param name="class" value="com.yourcompany.dwr.id_validate"></param>
</create>
</allow>
</dwr>
页面的js代码该如何写,使java类的判断传到js,请大虾赐教!
<script type="text/javascript">
function checkId(var id){
registerDWR.check(id,shows);
}
function shows(o){
alert(o);
}
</script>
<script type="text/javascript" src="dwr/engine.js"></script>
<script type="text/javascript" src="dwr/util.js"></script>
<script type="text/javascript" src="dwr/interface/registerDWR.js"></script>
是这三个支持吗
function checkName(){
registerDWR.check($("#check").val(),function(data){
if(data=='3'){
$("#check").append("用户名已经存在");
$("#check").focus();
}
}
}
<input name="name" type="text" onblur="checkName()" id="check"/>