使用JavaScript构建JSON格式字符串实现步骤

如果你现在正在使用Restful API，并且你需要通过web项目来构建json格式字符串的响应，那么这篇文章将帮助你使用javascript来创建json格式字符串。这是非常有用的，我们将通过jQuery插件$.toJSON把数据对象转换为json格式。

使用JavaScript构建JSON格式字符串
JavaScript代码:
在这里包含了javascript代码。$(“#form”).submit(function(){}- delete_button是form标签的ID，我们通过element.val()调用表单输入框的值。代码如下：

<script src="jquery.min.js"></script> 
<script src="jquery.json-2.2.js"></script> 
<script src="GetPostAjax.js"></script> 
<script type="text/javascript"> 
$(document).ready(function() 
{ 
$("#form").submit(function(e){ 
e.preventDefault(); 
var username,email,password,gender; 
username=$("#username").val(); 
email=$("#email").val(); 
password=$("#username").val(); 
gender=$("#gender").val(); 
if(username.length>0 && email.length>0 && password.length>0 &&gender.length>0) 
{ 
//Creating Objects 
var request = new Object(); 
var userDetails = new Object(); 
var user = new Object(); 
var websites=new Array(); 
user.name=username; 
user.email=email; 
user.password=password; 
user.gender=gender; 
//Array Push 
if(website1.length>0) 
websites.push(website1); 
if(website2.length>0) 
websites.push(website2); 
if(website3.length>0) 
websites.push(website3); 
user.websites=websites; 
userDetails.user = user; 
request.userDetails = userDetails; 
var jsonfy = $.toJSON(request); 
// Encodes special characters 
var encodedata = 'jsondata='+encodeURIComponent(jsonfy); 
//Ajax Call 
var url='website API URL'; 
post_data(url,encodedata, function(data) { 
alert("Success"); 
}); 
} 
}); 
}); 
</script">

HTML代码:

<form method='post' action='' id='form'> 
Name 
<input type='text' name='username' id='username' /> 
Email 
<input type='text' name='email' id='email' /> 
Password 
<input type='text' name='password' id='password' /> 
Gender 
<select name='gender' id='gender'><option value='male'>Male</option><option value='female'>Female</option></select> 
Websites 
<input type='text' id='website1' /> 
<input type='text' id='website2' /> 
<input type='text' id='website3' /> 
<input type='submit' id='submit'/> 
</form>

JSON输出

{ 
"userDetails":{ 
"user":{ 
"name":"Srinivas Tamada", 
"email":"[e-mail]", 
"password":"Srinivas Tamada", 
"gender":"male", 
"websites":["www.software8.co","www.heatpress123.net","www.0769zzw.com"] 
} 
} 
}

JSON Encoded
对特殊字符进行编码，会把以下字符进行编码：

, / ? : @ & = + $ # 
jsondata=%7B%22userDetails%22%3A%7B%22user%22%3A%7B%22name%22%3A%22Srinivas%20Tamada%22%2C%22email%22%3A%22srinivas%409lessons.info%22%2C%22password%22%3A%22Srinivas%20Tamada%22%2C%22gender%22%3A%22male%22%2C%22websites%22%3A%5B%22www.9lessons.info%22%2C%22www.egglabs.in%22%2C%22www.fglogin.com%22%5D%7D%7D%7D

GetPostAjax.js
这里定义了jquery的ajax请求方法。

function post_data(url,encodedata, success){ 
$.ajax({ 
type:"POST", 
url:url, 
data :encodedata, 
dataType:"json", 
restful:true, 
contentType: 'application/json', 
cache:false, 
timeout:20000, 
async:true, 
beforeSend :function(data) { }, 
success:function(data){ 
success.call(this, data); 
}, 
error:function(data){ 
alert("Error In Connecting"); 
} 
}); 
}