浏览器里面能打开,java代码下载的时候返回403错误码,可能是对方的网站中加入了防盗链的功能,可以尝试以下两种解决方案:
1)可以伪装成浏览器访问
HttpURLConnection conn = (HttpURLConnection) u.openConnection();
conn.setConnectTimeout(50000);
conn.setReadTimeout(50000);
conn.addRequestProperty("User-Agent","Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36");
conn.connect();
System.out.println("状态码:"+conn.getResponseCode());
2) 可能是cookie信息缺失,加入网站的cookie
conn.addRequestProperty("cookie","www3.wipo.int");
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