Four ways to share JSON parsing

  This article mainly introduces four methods of JSON parsing, and a friend in need can refer to the

JSON is very useful for web development, and as a carrier of data delivery, how to parse the data returned by JSON is very common. Here are four ways to parse JSON:   Part 1   code is as follows: var list1 = [1,3,4]; Alert (list1[1]); var list2 = [{"Name": "Leamiko", "Xing": "Lin"}]; Alert (list2[0]["Xing"]) alert (list2[0].xing)     Part 2     code is as follows: var value = {    "a": {         "Hangzhou": {"Item": "1"},       "Shanghai": {"Item": "2"},     & nbsp   "Chengdu": {"Item": "3"}    },     "America": {      "AA": {"Item": "1"}, &N Bsp       "BB": {"Item": "2"}       },     "Spain": { ,       DD ": {" Item ":" 1 "},        " ee ": {" Item ":" 2 "},      " FF ": {" Item ":" 3 "}  &nbs P    }}; for (var countryobj in value) {    document.write (countryobj + ": <br/>")    //useless for (Var cityo BJ in Value.countryobj)     for (Var cityobj inValue[countryobj])     {        document.write ('     ' + cityobj + "<br/>") ;         for (Var itemobj in Value[countryobj][cityobj])         {    &NB Sp       document.write ("     " + Itemobj + value[countryobj][cityobj][itemobj] + "<br/> ")            {   }   }        explanation:   Country OBJ is a property of the value object, Value[countryobj] is the property value of the value object for a JSON object such as B,value[countryobj][cityobj] to Josn object B It is also a JSON object, so value[countryobj][cityobj]["item" can take the value of a JSON object to temporarily become C, or Value[countryobj][cityobj].item.   It's critical to distinguish between JSON and array.   Part 3     code is as follows: var value2 = {      "" ": [        {" name ":" Hangzh ou "," Item ":" 1 "},         {" name ":" Shanghai "," Item ":" 2 "},    ,     {" name ":" Sichua N "," Item ":" 3 "}   &nbsp ],     "America": [        {"name": "AA", "Item": "A"},      ,   {"Name": " BB "," Item ":" 2 "}    ],    " Spain ": [   ,     {" Name ":" CC "," Item ":" 1 "},   &N Bsp     {"name": "DD", "Item": "A"},         {"name": "EE", "Item": "3"}    ]};   for (Var countryobj in value2) {    document.write (countryobj + ": <br/>")      &NB Sp for (Var cityobj in Value2[countryobj])     {       //Can be document.write (" " + value2 [Countryobj] [Cityobj].item + "<br/>");         document.write (cityobj + " " + value2[countryobj][cityobj]["name"] + "<br/>");       }}       explanation:   Countryobj for value2 object property name, Value2[countryobj] for value2 object attribute value in this In an example, it is an array, cityobj is an element of an array, and it is another JSON object, so value2[countryobj][cityobj]["name" accesses the genus of the object's nameValue, you can also access the property value through Value2[countryobj][cityobj].name.   Part 4     code as follows: var value2 = {    "" ": [        {" name ":" Hangzhou "," I TEM ":" 1 "},         {" name ":" Shanghai "," Item ":" 2 "},         {" name ":" Sichuan "," it Em ":" 3 "}    ],    " America ": [        {" name ":" AA "," Item ":" A "},         {"name": "BB", "Item": "2"}    ],     "Spain": [        {"Name": "CC", "Item": "1"},         {"name": "DD", "Item": ""},    ,     {"name": "EE", "Item": "3" }    ]};       for (Var countryobj in value2)     {        document.write (countryobj + ": <br/>")           //document.write (" " + value2[countryobj].length);         for (var i = 0;i < value2[countryobj].length; i++)         {            document.write (" " + value2[countryobj][i ] ["name"] + "<br/>");            {   }     Explanation:   countryobj value2 object property name, Value2[country OBJ] Property value in this case is an array, value2[countryobj].length the length of the array, the item = = JSON object of the Value2[countryobj][i] array.   value2[countryobj][i]["name" gets the value of name, or you can use Value2[countryobj][i].name to get the value of name.