php ztree异步加载数据格式,zTree异步加载简单demo
這幾天花了些時間,試了試zTree自帶的異步加載方式 還不錯.
有個奇怪的問題:
無論我在服務器設置 setContentType("text/plain;charset=UTF-8")或是 setContentType("application/json;charset=UTF-8"),zTree都會把接收到的數據當json格式,除非不符合json格式.
(另:JSONBuilder是個簡單的json處理類,適用于不復雜的數據格式)
以下是簡單的demo
test2.html
無標題文檔var nodeIcon = "images/4.png";
var groupIcon = "images/1_open.png";
function initTree(){
var setting = {
check: {
enable: true
},data: {
simpleData: {
enable: true
}
},async: {
enable: true,url:"http://localhost/web_test1/action/test2Action.jsp",dataType: "text",dataFilter: ajaxDataFilter,autoParam:["id"]
}
};
/***/
var zNodes =[
{id:"userGroup:__ALL__",name:"全部用戶組",open:true},{pId:"userGroup:__ALL__",id:"userGroup:001",name:"用戶組_001",isParent:true,open:false,icon:groupIcon},id:"userGroup:002",name:"用戶組_002",id:"hostGroup:001",name:"設備組_001",id:"hostGroup:002",name:"設備組_002",icon:groupIcon}
];
/***/
$.fn.zTree.init($("#myTree"),setting,zNodes);
}
function ajaxDataFilter(treeId,parentNode,data) {
//alert(data);
//alert( $(data).attr("count"));
var array = [];
//var jsonp = $.parseJSON(childNodes);
//var nc = parseInt($(jsonp).attr("count"));
var nc = parseInt($(data).attr("count"));
var _pId = parentNode.id;
var _id = null;
var _name = null;
//alert($(data).attr("id["+ i +"]"));
//alert("nc:"+nc);
//alert(parentNode.id);
for(var i=0; i
//item = {pId:parentNode.id,id:$(jsonp).attr("id["+ i +"]"),name:$(jsonp).attr("name["+ i +"]"),isParent:false,open:true};
//item = {pId:parentNode.id,id:"test:"+i,name:"test_"+i,open:true};
_id = $(data).attr("id["+ i +"]");
_name = $(data).attr("name["+ i +"]");
array[i] = {pId:_pId,id:_id,name:_name,open:true,icon:nodeIcon};
}
return array;
}
function old_ajaxDataFilter(treeId,childNodes) {
//alert(childNodes);
var txt = "";
var jsonp = $.parseJSON(childNodes);
var nc = parseInt($(jsonp).attr("count"));
for(var i=0; i
txt += $(jsonp).attr("id["+ i +"]") + "
";
}
alert(txt);
return null;
}
$(document).ready(function(){
initTree();
});
.div_frame{
width:800px;
border: 1px solid #a5a4a4;
}
.div_tree{
width:300px;
height:200px;
overflow:auto;
border: 1px solid #a5a4a4;
}
test2Action.jsp
Insert title here// String json = "{\"count\":\"3\",\"id[0]\":\"id_0\",\"id[1]\":\"id_1\",\"id[2]\":\"id_2\"}";
//String json = "{\"count\":\"2\",\"name[0]\":\"name_0\",\"name[1]\":\"name_1\",}";
String json = null;
Random rand = new Random(System.currentTimeMillis());
int count = rand.nextInt(8)+2;
JSONBuilder js = new JSONBuilder();
js.put("count",""+count);
for(int i=0; i
js.put("id["+ i +"]","test:"+i);
js.put("name["+ i +"]","test:"+i);
}
json = js.toJsonString();
String id = request.getParameter("id");
System.out.println("id:" + id);
//json => application/json text/x-json
// response.setContentType("text/plain;charset=UTF-8");
response.setContentType("application/json;charset=UTF-8");
response.setCharacterEncoding("UTF-8");
PrintWriter pw = response.getWriter();
pw.write(json);
pw.flush();
pw.close();
%>
JSONBuilder.java
package org.sl.json;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Properties;
/**
* 可以用來處理格式比較簡單的json字符串
* @author shanl
*
*/
public class JSONBuilder {
//private Properties dict = new Properties();
private Map dict = new LinkedHashMap(20);
/**
* 寫入一個鍵/值對
* @param key
* @param value
*/
public void put(String key,String value){
this.dict.put(replaceJsonChar(key),replaceJsonChar(value));
}
private String replaceJsonChar(String str){
StringBuilder sb = new StringBuilder();
char[] chs = str.tocharArray();
for(char c: chs){
switch (c) {
case '\"':
sb.append("\\\"");
break;
case '\\':
sb.append("\\\\");
break;
case '/':
sb.append("\\/");
break;
case '\b':
sb.append("\\b");
break;
case '\f':
sb.append("\\f");
break;
case '\n':
sb.append("\\n");
break;
case '\r':
sb.append("\\r");
break;
case '\t':
sb.append("\\t");
break;
default:
sb.append(c);
}
}
return sb.toString();
}
/**
* 返回鍵/值對列表
* @return
*/
public Map getDict(){
return dict;
}
/**
* 返回鍵所對應的值
* @param key
* @return
*/
public String getValue(String key){
return dict.get(key);
}
/**
* 解析json格式字符串
* @param json
*/
public void parseJsonString(String json){
String _json = json;
String[] ss = null;
String[] tmp = null;
_json = _json.trim(); //去掉兩端空格
_json = _json.substring(2); //去掉 {"
_json = _json.substring(0,_json.length()-2); //去掉 }"
ss = _json.split("\",\"");
for(String s: ss){
tmp = s.split("\":\"");
put(tmp[0],tmp[1]);
}
}
/**
* 將數據轉換成json格式字符串
* @return
*/
public String toJsonString(){
String sb = "";
String key = null;
String value = null;
Iterator keys = dict.keySet().iterator();
//Enumeration keys = dict.propertyNames();
sb += "{";
while(keys.hasNext()){
key = keys.next();
value = dict.get(key);
sb += "\""+ key +"\":";
sb += "\""+ value +"\",";
}
if(sb.endsWith(",") ){
sb = sb.substring(0,sb.length()-1);
}
sb += "}";
return sb.toString();
}
public String toString(){
return toJsonString();
}
}
JSONBuilder測試類,Test2.java:
package test1;
import org.sl.json.JSONBuilder;
public class Test2 {
public static void main(String[] args){
t7();
//t1();
}
static void t7(){
String str = "{\"count\":\"3\",\"id[2]\":\"id_2\"}";
JSONBuilder js = new JSONBuilder();
js.parseJsonString(str);
System.out.println(js.getValue("id[1]"));
}
static void t6(){
JSONBuilder js = new JSONBuilder();
js.put("abc\"sasas","sasjajsas\"saas");
System.out.println(js.toJsonString());
}
static void t5(){
String str = "{\"count\":\"3\",\"id[2]\":\"id_2\"}";
JSONBuilder js = new JSONBuilder();
js.parseJsonString(str);
System.out.println(js.getValue("count"));
System.out.println(js.getValue("id[0]"));
}
static void t4(){
String str = "'{\"count\":\"3\",\"id[2]\":\"id_2\"}'";
JSONBuilder js = new JSONBuilder();
js.parseJsonString(str);
System.out.println(js.getValue("count"));
}
static void t3(){
String str = "'{\"count\":\"3\",\"id[2]\":\"id_2\"}'";
String[] ss = str.split("\",\"");
for(String s: ss){
System.out.println(s);
}
}
static void t2(){
JSONBuilder js = new JSONBuilder();
String str = "'{\"count\":\"3\",\"id[2]\":\"id_2\"}'";
str = str.trim();
str = str.substring(3);
str = str.substring(0,str.length()-3);
System.out.println(str);
System.out.println();
String[] tmp = null;
String[] ss = str.split("\",\"");
for(String s: ss){
tmp = s.split("\":\"");
js.put(tmp[0],tmp[1]);
}
System.out.println(js.getValue("count"));
}
static public void t1(){
JSONBuilder js = new JSONBuilder();
int c = 3;
js.put("count",c+"");
for(int i=0; i
js.put("id["+ i +"]","id_"+i);
}
System.out.println(js.toJsonString());
}
}
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總結
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