从Java中的查询字符串中提取参数及其值 [英] Extract parameters and their values from query string in Java

问题描述

所以我假设我有一个字符串，如

So let's suppose I have a string like

param1 = value1& param2 = {url：http：// somesite .com？someparam = somevalue& someparam1 = somevalue1}& param3 = value3

我需要它：

param1：value1

param2 ：{url：http://somesite.com?someparam=somevalue&someparam1=somevalue1}

param3：value3

用Java解析这个问题的最佳方法是什么？到目前为止，我找不到标准Java库的解决方案，我不想重新发明轮子。

What would be the best approach to parse this in Java? So far I could not found a solution with standard Java libraries, and I don't want to reinvent the wheel.

我尝试过（但它不起作用）如果我只放置像我这样的查询参数）：

I've tried with (but it would not work if I put there only query parameters like mine):

String url = "http://www.example.com/something.html?one=11111&two=22222&three=33333";
List<NameValuePair> params = URLEncodedUtils.parse(new URI(url), "UTF-8");

for (NameValuePair param : params) {
    System.out.println(param.getName() + " : " + param.getValue());
}

推荐答案

你为什么不用类似于正则表达式：

Why don't you use something like a regex :

例如像这样一个。* \\？param1 =（。*）& param2 =（ 。*）& param3 =（。*）$这适用于您的网址示例，这就是为什么我添加。* \\？ part;）

for example like this one ".*\\?param1=(.*)&param2=(.*)&param3=(.*)$" this works for your url sample that's why I added the .*\\? part ;)

这将适用于第一个样本（param1 = value1& param2 = {url：http：/ /somesite.com?someparam=somevalue&someparam1=somevalue1}& param3 = value3
- >
param1 =（。*） & param2 =（。*）& param3 =（。*）$

and this will work for the first sample ("param1=value1&param2={"url":"http://somesite.com?someparam=somevalue&someparam1=somevalue1"}&param3=value3" --> param1=(.*)&param2=(.*)&param3=(.*)$

当然，如果您的参数名称不是你不知道

Of course if your params names aren't also something you don't know about

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