java - 带有中文字符的无效 URI (Java)

Question

在 URL 中设置带有中文字符的 URL 连接时遇到问题。它适用于拉丁字符:

String xstr = "维也纳恩斯特哈佩尔球场" ;
URI uri = new URI("http","ajax.googleapis.com","/ajax/services/language/detect","v=1.0&q="+xstr,null);   
URL url = uri.toURL(); 
URLConnection connection = url.openConnection();
InputStream is = connection.getInputStream() ;

getInputStream() 调用的结果是:

java.lang.IllegalArgumentException: Invalid uri 'http://ajax.googleapis.com/ajax/services/language/detect?v=1.0&q=???????????': Invalid query

Answer 1

问题是由于 URI.toURL() 没有对非 ASCII 字符进行百分号编码。请改用以下内容:

URL url = new URL(uri.toASCIIString());