JSON background Date Format Conversion

If you use the extjs framework for Web application development, you may encounter many time-related issues. The main problems may occur in two aspects:

1. After reading data in the date format in the background database, package the data in JSON format and upload it to the foreground for display.

2. The front-end is formatted (for example, yyyy-mm-dd hh: mm: ss) In JSON format.

The following describes these two important issues in detail.

When the conversion includes year, month, day, hour, minute, and second,

String x="[{'id':'1','fixOkdate':'2013-07-23 10:47:00','containerNumber':'1',

'evaluatePrice':33,'contractor':'','operator':'','containerType':'','containerLevel':''

,'loggingMan':'','loggingDate':'','fixGroup':'','qc':''}]";

JSONArray obj = JSONArray.fromObject(x);List<Map> list = JSONArray.toList(obj, Map.class);for (int i = 0; i < list.size(); i++) {Map temp = list.get(i);String id = temp.get("id").toString();System.out.println(id);}

X must be an array. Only strings in JSON format can get the id value correctly.

String param="{'id':'3','containerProperty':'3','boatName':'3','voyageNumber':'3',

'getContainerDate':null,'destinationPort':'3','ladingbillNumber':'3','containerType':'3',

'containerSize':'3'}";

YxFieldneedcn b=(YxFieldneedcn) MyTools.formJSONtoBean(param, YxFieldneedcn.class);System.out.println(b);

When a string in JSON format contains a time string, for example, getcontainerdate, the value is null or yyyy-mm-dd hh: mm: SS, otherwise, an error occurs during conversion to a Java object. It cannot be a null string.

Extjs learning ....

1. The function can be automatically executed and parameters can be passed to the function.

(function(name){       console.log(name);    }('wocao'))

2,

Detection type

 Ext.onReady(function(){       var i,j,k,defaults;       var xx='222'||{};       var yy=222||{};       var zz=defaults||{};       console.log(typeof xx);// string       console.log(typeof yy);//number       console.log(typeof zz);//object }); 

3. Output object and copy object

Ext. onready (function () {var I, J, K, defaults; var OBJ = {A: 'aaa', B: 'bbb ', C: 'ccc '}; vaR xx = defaults | {}; // attributes of the loop output object for (I in OBJ) {console. log (OBJ [I]); XX [I] = OBJ [I];} For (J in XX) {console. log (XX [J]) ;}});

Alternatively, you can directly use the functions provided by the Framework in extjs4.

Ext. onready (function () {var I, J, K, defaults; var OBJ = {A: 'aaa', B: 'bbb ', C: 'ccc '}; vaR xx = defaults | {}; // attributes of the loop output object for (I in OBJ) {Ext. apply (XX, OBJ);} For (J in XX) {console. log (XX [J]) ;}});

4,

var x=trueconsole.log(!x?'222':'333');

When! If the value of X is true, the output is 222. If the value of X is false, the output is 333.

5,

console.log(Ext.isObject(null));

If the value is false, the Javascript bug about null value is corrected.

6. Use Ext. iterate to iterate the object

var x={x:'1',y:'2',z:function(){}};Ext.iterate(x,function(record,value){   console.log(record);   console.log(value);},null);

7,

(function() {  var x='2222';  pp.bb={    et:function(){      console.log('et');    }  }})();console.log(pp.bb);

When () is added to a function, the function is executed immediately. In this way, you can access the attributes and methods defined in the function. When adding a method, it must be in an attribute object.

8. Obtain the parameters in the store.

var store=Ext.StoreManager.get('yx.Summary');var f=store.filters.items;console.log(f[1].value);

In this way, you cannot use store. Proxy. extraparams. Instead, you should use store. Filter ("key", "value ")

9

var obj={'x':'bb'};Ext.ClassManager.setNamespace('MyCompany.pkg.Example',obj);alert(MyCompany.pkg.Example===obj);

Returns true.

10,

Ext.define('Logger', {             singleton: true,             log: function(msg) {                 console.log(msg);             }});Logger.log('Hello');

11,

Ext.define('my',{  extend: 'Ext.panel.Panel',  bb:'bb_value',  cc:function(){     console.log('cc_function');  }});Ext.define('my',{   override:'my',   dd:'dd'});var x=new my();console.log(x.bb);

12,

In the extjs4 environment, you can perform this loop.

var xx=['dd','bb','cc'],t=xx.shift(); for ( ; t ;t = xx.shift()) {    console.log(t); }

// Shift () is used to delete the first element in the array and return

When the preceding loop determines whether T is null or undefined, JavaScript treats this value as false and stops execution.

13,

var m=new  cthd.model.xx.EvaluateBillFee({id:records[0].data.id});

In this way, you can obtain a new model instance.

14. How to save the last used variable in extjs4

Ext. onready (function () {If (ext. blank_image_url.substr )! = "Data") {Ext. blank_image_url = ". /loader/images/s.gif ";} // Add extjs code var els = ext. select (". smallimg "); var bigimg = ext. getdom ("bigimg"); var Index = 0; var fn = function (v) {console. log (INDEX); var ell = els; ell. item (index ). removecls ("select"); Index = index + V; If (index <0) {Index = 2;} else if (index> 2) {Index = 0 ;}; vaR El = ell. item (INDEX); El. radiocls ("select"); var src = el. dom. SRC; bigimg. src = SRC. substr (0, SRC. length-6) + SRC. substr (SRC. length-5) ;}; Ext. create ("Ext. util. keynav "," div1 ", {up: function () {fn (-1) ;}, down: function () {fn (1) ;}, scope: this });});