- 论坛徽章:
- 0
|
需要的JAVA类
package com.ajaxlab.ajax;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;
import com.ajaxlab.ajax.ProductClass;
public class ClassService {
private Document dom;
public ClassService(){
try{
SAXBuilder builder=new SAXBuilder();
this.dom=builder.build(ClassService.class.getResource("product.xml"));
}catch(Exception e){
e.printStackTrace();
}
}
public ProductClass[] getAllClass1(){
Collection products=new ArrayList();
Iterator iterator=this.dom.getRootElement().getChildren().iterator();
do{
Element element=(Element)iterator.next();
ProductClass product=new ProductClass(element.getAttributeValue("id"),
element.getAttributeValue("className"));
products.add(product);
}while(iterator.hasNext());
return (ProductClass[])products.toArray(new ProductClass[0]);
}
public ProductClass[] getAllClass2ById(String class1Id){
Collection products=new ArrayList();
Element classElement=null;
Iterator iterator=this.dom.getRootElement().getChildren().iterator();
do{
Element element=(Element)iterator.next();
if(class1Id.equalsIgnoreCase(element.getAttributeValue("id"))){
classElement=element;
break;
}
}while(iterator.hasNext());
if(classElement!=null){
Iterator iter=classElement.getChildren().iterator();
do{
Element element=(Element)iter.next();
ProductClass product=new ProductClass(element.getAttributeValue("id"),
element.getAttributeValue("className"));
products.add(product);
}while(iter.hasNext());
return (ProductClass[])products.toArray(new ProductClass[0]);
}
else{
return null;
}
}
public ProductClass[] getAllClass3ById(String class1Id,String class2Id) {
Collection products = new ArrayList();
Element class1Element = null;
Element class2Element = null;
Iterator iterator = this.dom.getRootElement().getChildren().iterator();
do {
Element element = (Element)iterator.next();
if(class1Id.equalsIgnoreCase(element.getAttributeValue("id"))) {
class1Element = element;
break;
}
}while(iterator.hasNext());
if(class1Element!=null) {
Iterator iter = class1Element.getChildren().iterator();
do {
Element element = (Element)iter.next();
if(class2Id.equalsIgnoreCase(element.getAttributeValue("id"))) {
class2Element = element;
break;
}
}while(iter.hasNext());
if(class2Element!=null) {
Iterator iter2 = class2Element.getChildren().iterator();
do {
Element element = (Element)iter2.next();
ProductClass product = new ProductClass(element.getAttributeValue("id"),element.getAttributeValue("className"));
products.add(product);
}while(iter2.hasNext());
}
return (ProductClass[])products.toArray(new ProductClass[0]);
}
else return null;
}
}
JSP:
(1)getClass.jsp 充当业务层供ajax调用
if("".equals(class1Id)) class1Id = null;
if("".equals(class2Id)) class2Id = null;
ClassService service = new ClassService();
if((class1Id!=null)&&(class2Id==null)) {
ProductClass[] classes = service.getAllClass2ById(class1Id);
if(classes!=null) {
for(int i=0;i
(2)divmenu.jsp
function doChange() {
var f = document.forms[0];
send_request("GET","getClass.jsp?class1Id="+f.select11.value+"&class2Id=",null,"TEXT",populateClass2);
}
function doChange2() {
var f = document.forms[0];
send_request("GET","getClass.jsp?class1Id="+f.select11.value+"&class2Id="+f.select12.value,null,"TEXT",populateClass3);
}
function populateClass2(){
var f=document.forms[0];
if(http_request.readystate==4){
if(http_request.status==200){
var list=http_request.responseText;
var classList=list.split("|");
f.select12.options.length=1;
for(var i=0;i= 0 && whitespace.indexOf(s.charAt(i)) != -1)
{
i--;
}
s = s.substring(0, i+1);
}
return s;
}
function Trim(str)
{
return RTrim(LTrim(str));
}
Insert title here
请选择分类一
"+classes.getClassName()+"");
}
%>
请选择分类二
请选择分类三
本文来自ChinaUnix博客,如果查看原文请点:http://blog.chinaunix.net/u/10945/showart_332794.html |
|