URL.openConnection()和URLConnection.connect()之间的区别? [英] Difference between URL.openConnection() and URLConnection.connect()?

问题描述

在代码中:

HttpURLConnection connection = (HttpURLConnection)createMerchURL.openConnection();
connection.setRequestMethod("PUT");
connection.addRequestProperty("Name", "Value1");

connection.connect();

..
connection.disconnect();

• 实际上什么时候打开连接?在..createMerchURL.openConnection();处?还是在connection.connect();?

  • When is the connection getting opened actually? At ..createMerchURL.openConnection(); ? or at connection.connect();?

    如何在connection对象中设置URL并将其与connection.connect()一起使用?(因为我对.openConnection()不太满意)

    How can I set URL in the connection Object and use it with connection.connect()?(as I am less comfortable with .openConnection())

    最后，两者之间有什么区别吗?

    Finally, is there any difference between the two?

    谢谢..

    推荐答案

    实际上什么时候打开连接?在..createMerchURL.openConnection(); ?或在connection.connect();处?

    When is the connection getting opened actually? At ..createMerchURL.openConnection(); ? or at connection.connect();?

    后者.前者只是解析URL，找到协议，然后创建HttpURLConnection对象.

    The latter. The former just parses the URL, finds the protocol, and creates the HttpURLConnection object.

    如何在连接对象中设置URL

    How can I set URL in the connection Object

    你不能.

    并与connection.connect()一起使用?

    and use it with connection.connect()?

    你不能.

    (因为我不太喜欢.openConnection())

    (as I am less comfortable with .openConnection())

    运气不好:对此感到满意.

    Bad luck: get comfy with it.

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