


JSON (JavaScript Object Notation) is a subset of the JavaScript programming language. Because JSON is a subset of JavaScript, it can be clearly used in this language.
eval function Convert JSON text to object
In order to convert JSON text into an object, you can use the eval function. The eval function calls the JavaScript editor. Since JSON is a subset of JavaScript, the compiler will correctly parse the text and produce object structures. Text must be enclosed in parentheses to avoid JavaScript syntax ambiguities.
var obj = eval('(' JSONTest ')'); The eval function is very fast. It can compile and execute any JavaScript program, thus creating security issues. The eval function should only be used when using trusted and complete source code. This allows for safer parsing of JSON text. For web applications that use XmlHttp, communication between pages only allows the same origin, so it can be trusted. But it is not perfect. If the server does not have strict JSON encoding, or does not have strict input validation, it may transmit invalid JSON text including dangerous scripts. The eval function will execute the malicious script.
JSON interpreter JSON.parse, JSON.stringify
Using a JSON parser can prevent security risks like the eval function that converts JSON text into objects. The JSON parser can only recognize JSON text and reject all scripts. Browsers that provide native JSON support will have their JSON parsers much faster than the eval function.
Currently, Firefox, Opera, and IE8 and above also provide local JSON support. Among them, the functions provided by the JSON interpreter are: JSON.parse, JSON.stringify.
For browsers that do not provide native JSON support, you can introduce the script json2.js to implement the JSON conversion function. The json2.js script can be downloaded from the https://github.com/douglascrockford/JSON-js/blob/master/json2.js page.
JSON.parse function
Convert JSON text to object.
JSON.parse(text[, reviver])
Parameters
text
Required. JSON text to be converted to an object.
reviver
Optional. This parameter is a replacement function. In the transformation, for each node traversed, this function will be executed, and the return value of the function will replace the corresponding node value of the transformation result.
JSON.stringify function
Convert object to JSON text.
JSON.stringify(value[, replacer[, space]])
Parameters
text
Required. The object to be converted to JSON text.
reviver
Optional. This parameter is a replacement function. In the transformation, for each node traversed, this function will be executed, and the return value of the function will replace the corresponding node value of the transformation result.
space
Optional. The number of spaces to indent the formatted output JSON text. If this parameter is not provided the output will not be formatted.
Delegate type of parameter reviver
reviver(key, value)
This in the reviver function is the parent node of the node currently traversed. When the root node is traversed, the parent node is an Object object, the root node is an attribute of the object, and the attribute name is an empty string.
Parameters
key
When the parent node is an array Object, the key is the array index, otherwise the key is the Object property name.
value
node value.
Note: JSON does not support circular data structures.
jQuery.parseJSON( jsonTex )
jQuery also has a method for converting strings to JSON format, jQuery.parseJSON(json), which accepts a standard format JSON string and returns a parsed JavaScript (JSON) object. Of course, if you are interested, you can encapsulate a jQuery extension yourself. jQuery.stringifyJSON(obj) converts JSON into a string.
The above is the entire content of this article. I hope you all like it.

1、先看看效果图,可以自行选择展示效果2、这是我在vue3项目中使用的JSON编辑器,首先引入第三方插件npminstalljson-editor-vue3yarnaddjson-editor-vue33、引入到项目中//导入模块importJsonEditorVuefrom'json-editor-vue3'//注册组件components:{JsonEditorVue},4、一般后端返回的是会将JSON转为String形式我们传给后端也是通过这种形式,就可以通

控制json序列化/反序列化1.@JsonIgnoreProperties的用法@JsonIgnoreProperties(value={"prop1","prop2"})用来修饰Pojo类,在序列化和反序列化的时候忽略指定的属性,可以忽略一个或多个属性.@JsonIgnoreProperties(ignoreUnknown=true)用来修饰Pojo类,在反序列化的时候忽略那些无法被设置的属性,包括无法在构造子设置和没有对应的setter方法.2.@Js

Java调用接口获取json数据保存到数据库1.在yml文件中配置自己定义的接口URL//自己定义的JSON接口URLblacklist_data_url:接口URL2.在Controller中添加请求方法和路径/***@Title:查询*@Description:查询车辆的记录*@Author:半度纳*@Date:2022/9/2717:33*/@GetMapping("/Blacklist")publicvoidselectBlacklist(){booleana=imB

本篇文章给大家带来了关于JWT的相关知识,其中主要介绍了什么是JWT?JWT的原理以及用法是什么?感兴趣的朋友,下面一起来看一下吧,希望对大家有帮助。

PHP作为一种常见的编程语言,在web开发中使用广泛,其与前端交互的方式也多种多样。其中,输出Json数据是一种常见的交互方式,但有时候会碰到Json无法解析的问题。为什么会出现无法解析的情况呢?下面列举了几个可能的原因。

JSONSchemaJSONSchema是用于验证JSON数据结构的强大工具,Schema可以理解为模式或者规则。JsonSchema定义了一套词汇和规则,这套词汇和规则用来定义Json元数据,且元数据也是通过Json数据形式表达的。Json元数据定义了Json数据需要满足的规范,规范包括成员、结构、类型、约束等。JSONSchema就是json的格式描述、定义、模板,有了他就可以生成任何符合要求的json数据json-schema-validator在java中,对json数据格式的校验,使用

当我们处理数据时经常会遇到将XML格式转换为JSON格式的需求。PHP有许多内置函数可以帮助我们执行这个操作。在本文中,我们将讨论将XML格式转换为JSON格式的不同方法。

一、@RestController注解在SpringBoot中的Controller中使用@RestController注解即可返回JSON格式的数据。@RestController注解包含了@Controller和@ResponseBody注解。@ResponseBody注解是将返回的数据结构转换为JSON格式。@Target({ElementType.TYPE})@Retention(RetentionPolicy.RUNTIME)@Documented@Controller@Respons


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

SublimeText3 Linux new version
SublimeText3 Linux latest version

SublimeText3 Chinese version
Chinese version, very easy to use

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Mac version
God-level code editing software (SublimeText3)
