直接上代码:
import java.net.HttpURLConnection;
import java.net.URL;
import org.junit.Assert;
import org.junit.Test;
public class GetRedirectUrlTest {
@Test
public void test_getRedirectUrl() throws Exception {
String url="http://www.baidu.com/link?url=ByBJLpHsj5nXx6DESXbmMjIrU5W4Eh0yg5wCQpe3kCQMlJK_RJBmdEYGm0DDTCoTDGaz7rH80gxjvtvoqJuYxK";
String expectUrl="http://www.zhihu.com/question/20583607/answer/16597802";
String redictURL = getRedirectUrl(url);
Assert.assertEquals(expectUrl, redictURL);
}
/**
* 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");
}
}