/**
* 获取重定向地址
* @param path
* @return
* @throws Exception
*/
private String getRedirectUrl(String path) throws Exception {
HttpURLConnection conn = (HttpURLConnection) new URL(path)
.openConnection();
conn.setInstanceFollowRedirects(false);
conn.setConnectTimeout(5000);
return conn.getHeaderField("Location");
}
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