知识大全浅析Js(Jquery)中,字符串与JSON格式互相转换的示例

Posted 2022-07-20 内容

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这几天遇到了json格式在JS和Jquey的环境中需要相互转换在网上查了一下大多为缺胳膊少腿也许咱是菜鸟吧终于测试成功后还是给初学者们一个实例吧

　　首先准备新建一个js文件以下是JSON js的内容把内容拷到js文件中以便调用

复制代码代码如下: /* Public Domain NO WARRANTY EXPRESSED OR IMPLIED USE AT YOUR OWN RISK See This code should be minified before deployment See USE YOUR OWN COPY IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO NOT CONTROL This file creates a global JSON object containing o methods: stringify and parse JSON stringify(value replacer space) value any JavaScript value usually an object or array replacer an optional parameter that determines how object values are stringified for objects It can be a function or an array of strings space an optional parameter that specifies the indentation of nested structures If it is omitted the text will be packed without extra whitespace If it is a number it will specify the number of spaces to indent at each level If it is a string (such as t or ) it contains the characters used to indent at each level This method produces a JSON text from a JavaScript value When an object value is found if the object contains a toJSON method its toJSON method will be called and the result will be stringified A toJSON method does not serialize: it returns the value represented by the name/value pair that should be serialized or undefined if nothing should be serialized The toJSON method will be passed the key associated with the value and this will be bound to the value For example this would serialize Dates as ISO strings Date prototype toJSON = function (key) function f(n) // Format integers to have at least o digits return n < ? + n : n; return this getUTCFullYear() + + f(this getUTCMonth() + ) + + f(this getUTCDate()) + T + f(this getUTCHours()) + : + f(this getUTCMinutes()) + : + f(this getUTCSeconds()) + Z ; ; You can provide an optional replacer method It will be passed the key and value of each member with this bound to the containing object The value that is returned from your method will be serialized If your method returns undefined then the member will be excluded from the serialization If the replacer parameter is an array of strings then it will be used to select the members to be serialized It filters the results such that only members with keys listed in the replacer array are stringified Values that do not have JSON representations such as undefined or functions will not be serialized Such values in objects will be dropped; in arrays they will be replaced with null You can use a replacer function to replace those with JSON values JSON stringify(undefined) returns undefined The optional space parameter produces a stringification of the value that is filled with line breaks and indentation to make it easier to read If the space parameter is a non empty string then that string will be used for indentation If the space parameter is a number then the indentation will be that many spaces Example: text = JSON stringify([ e pluribus: unum ]); // text is ["e" "pluribus":"unum"] text = JSON stringify([ e pluribus: unum ] null t ); // text is [nt"e" ntntt"pluribus": "unum"ntn] text = JSON stringify([new Date()] function (key value) return this[key] instanceof Date ? Date( + this[key] + ) : value; ); // text is ["Date( current time )"] JSON parse(text reviver) This method parses a JSON text to produce an object or array It can throw a SyntaxError exception The optional reviver parameter is a function that can filter and transform the results It receives each of the keys and values and its return value is used instead of the original value If it returns what it received then the structure is not modified If it returns undefined then the member is deleted Example: // Parse the text Values that look like ISO date strings will // be converted to Date objects myData = JSON parse(text function (key value) var a; if (typeof value === string ) a = /^(d ) (d ) (d )T(d ):(d ):(d (?: d*)?)Z$/ exec(value); if (a) return new Date(Date UTC(+a[ ] +a[ ] +a[ ] +a[ ] +a[ ] +a[ ])); return value; ); myData = JSON parse( ["Date( / / )"] function (key value) var d; if (typeof value === string && value slice( ) === Date( && value slice( ) === ) ) d = new Date(value slice( )); if (d) return d; return value; ); This is a reference implementation You are free to copy modify or redistribute */ /*jslint evil: true strict: false regexp: false */ /*members "" "b" "t" "n" "f" "r" """ JSON "" apply call charCodeAt getUTCDate getUTCFullYear getUTCHours getUTCMinutes getUTCMonth getUTCSeconds hasOwnProperty join lastIndex length parse prototype push replace slice stringify test toJSON toString valueOf */ // Create a JSON object only if one does not already exist We create the // methods in a closure to avoid creating global variables if (!this JSON ) this JSON = ; (function () "use strict"; function f(n) // Format integers to have at least o digits return n < ? + n : n; if (typeof Date prototype toJSON !== function ) Date prototype toJSON = function (key) return isFinite(this valueOf()) ? this getUTCFullYear() + + f(this getUTCMonth() + ) + + f(this getUTCDate()) + T + f(this getUTCHours()) + : + f(this getUTCMinutes()) + : + f(this getUTCSeconds()) + Z : null; ; String prototype toJSON = Number prototype toJSON = Boolean prototype toJSON = function (key) return this valueOf(); ; var cx = /[u u adu u u fu b u b u c u fu u fu u fufeffufff uffff]/g escapable = /["x x fx f x fu adu u u fu b u b u c u fu u fu u fufeffufff uffff]/g gap indent meta = // table of character substitutions b : b t : t n : n f : f r : r " : " : \\ rep; function quote(string) escapable lastIndex = ; return escapable test(string) ? " + string replace(escapable function (a) var c = meta[a]; return typeof c === string ? c : u + ( + a charCodeAt( ) toString( )) slice( ); ) + " : " + string + " ; function str(key holder) var i // The loop counter k // The member key v // The member value length mind = gap partial value = holder[key]; if (value && typeof value === object && typeof value toJSON === function ) value = value toJSON(key); if (typeof rep === function ) value = rep call(holder key value); switch (typeof value) case string : return quote(value); case number : return isFinite(value) ? String(value) : null ; case boolean : case null : return String(value); case object : if (!value) return null ; gap += indent; partial = []; if (Object prototype toString apply(value) === [object Array] ) length = value length; for (i = ; i < length; i += ) partial[i] = str(i value) || null ; v = partial length === ? [] : gap ? [n + gap + partial join( n + gap) + n + mind + ] : [ + partial join( ) + ] ; gap = mind; return v; if (rep && typeof rep === object ) length = rep length; for (i = ; i < length; i += ) k = rep[i]; if (typeof k === string ) v = str(k value); if (v) partial push(quote(k) + (gap ? : : : ) + v); else for (k in value) if (Object hasOwnProperty call(value k)) v = str(k value); if (v) partial push(quote(k) + (gap ? : : : ) + v); v = partial length === ? : gap ? n + gap + partial join( n + gap) + n + mind + : + partial join( ) + ; gap = mind; return v; if (typeof JSON stringify !== function ) JSON stringify = function (value replacer space) var i; gap = ; indent = ; if (typeof space === number ) for (i = ; i < space; i += ) indent += ; else if (typeof space === string ) indent = space; rep = replacer; if (replacer && typeof replacer !== function && (typeof replacer !== object || typeof replacer length !== number )) throw new Error( JSON stringify ); return str( : value); ; if (typeof JSON parse !== function ) JSON parse = function (text reviver) var j; function walk(holder key) var k v value = holder[key]; if (value && typeof value === object ) for (k in value) if (Object hasOwnProperty call(value k)) v = walk(value k); if (v !== undefined) value[k] = v; else delete value[k]; return reviver call(holder key value); text = String(text); cx lastIndex = ; if (cx test(text)) text = text replace(cx function (a) return u + ( + a charCodeAt( ) toString( )) slice( ); ); if (/^[] :s]*$/ test(text replace(/(?:["/bfnrt]|u[ a fA F] )/g @ ) replace(/"[^"nr]*"|true|false|null| ?d+(?: d*)?(?:[eE][+ ]?d+)?/g ] ) replace(/(?:^|:| )(?:s*[)+/g ))) j = eval( ( + text + ) ); return typeof reviver === function ? walk( : j ) : j; throw new SyntaxError( JSON parse ); ; ());

　　第二调用页的内容注意调用js文件的路径需要自己调整这点如果不会那就别再继续看了

复制代码代码如下: cha138/Article/program/Java/JSP/201311/20282

知识大全 浅析Js(Jquery)中,字符串与JSON格式互相转换的示例

知识大全浅析Js(Jquery)中,字符串与JSON格式互相转换的示例