在Servlet中消耗JSON对象的问题 [英] Problem consuming JSON object in a servlet

问题描述

这是我正在尝试做的事情，它非常简单，但是我陷入了困境:我正在尝试将JSP中形成的JSON对象发送到服务器端servlet并对其进行解析.

This is what i'm trying to do and its pretty simple but i'm getting stuck: I'm trying to send a JSON object formed in JSP to a server side servlet and parse it .

我到目前为止所做的事情:

What i've done till now:

• 构造了json.
• 将json发送到后端

$.ajax({
            data: jsontosend,
            url: 'MYSERVLET?name=asdf',
            success: function(res){
                alert('posted');
            }
        })

问题:

• 此JSON的名称是什么，因此我可以使用request.getParameter()在servlet中获取它?
• 当我打印request.getParameterNames()时，我将参数名称作为JSON字符串本身获取，因此MYSERVLET中所有参数名称的输出看起来像这样

Parameter = name
Parameter = {"ticker":"asd","date":"asd","bucket":"300","entry":[{"type":"asd","indicator":"asd","condition":"asd"}],"exit":[{"type":"qwe","indicator":"qwe","condition":"qwe"}]}

任何人都有什么问题的主意吗?

Anyone have an idea as to what the problem is ?

我也尝试查看此此处关于stackoverflow的问题，但存在相同的问题那里.还有一个重复问题，它没有得到了答复.

Also i tried looking at this question here on stackoverflow but the same problem exists there too. Also there is a duplicate question which hasn't been answered .

帮助！ :(

推荐答案

阅读 http://api.jquery.com/jQuery.ajax/#sending-data-to-server :

data选项可以包含以下形式的查询字符串 key1 = value1& key2 = value2，或格式为{key1:'value1'，key2: 'value2'}.如果使用后一种形式，则数据将转换为 发送前使用jQuery.param()查询字符串.

The data option can contain either a query string of the form key1=value1&key2=value2, or a map of the form {key1: 'value1', key2: 'value2'}. If the latter form is used, the data is converted into a query string using jQuery.param() before it is sent.

因此，您应该使用

$.ajax({
        data: {theNameOfTheParameter : jsontosend,
               name : 'asdf'},
        url: 'MYSERVLET',
        success: function(res){
            alert('posted');
        }
    })

并使用request.getParameter("theNameOfTheParameter")获取JSON字符串.

and use request.getParameter("theNameOfTheParameter") to get the JSON string.

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