JSoup检索URL不起作用 [英] JSoup Retrieve URL Not Working

问题描述

我有一个

I have a URL and I use JSoup to retieve web page indicated by this url.

try{
    doc = Jsoup.connect(url).timeout(5000).get();
}catch(IOException e){
    e.printStackTrace();
}

但是我得到以下异常:

Exception in thread "main" java.lang.IllegalArgumentException: Must supply a valid URL
    at org.jsoup.helper.Validate.notEmpty(Validate.java:102)
    at org.jsoup.helper.HttpConnection.url(HttpConnection.java:48)
    at org.jsoup.helper.HttpConnection.connect(HttpConnection.java:24)
    at org.jsoup.Jsoup.connect(Jsoup.java:59)

推荐答案

检查以下内容:

1. 您要将预期的URL传递给url变量.
2. URL的格式正确，可以肯定.

1. You are passing intended URL to url variable.
2. The URL is well formed just to be doubly sure.

Jsoup的Validate.java中的方法notEmpty检查Url是否为空.

The Method notEmpty in Validate.java of Jsoup checks if the Url is not empty.

    public static void notEmpty(String string) {
        if (string == null || string.length() == 0)
            throw new IllegalArgumentException("String must not be empty");
    }

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