SDK中关于HttpURLConnection.setDoInput(true)和HttpURLConnection.setDoOutput(true)的描述

直接看SDK java.net.URLConnection

• java.lang.Object
• • java.net.URLConnection
  • • java.net.HttpURLConnection

• setDoInput

  public void setDoInput(boolean doinput)

  Sets the value of the doInput field for this URLConnection to the specified value.

  A URL connection can be used for input and/or output. Set the DoInput flag to true if you intend to use the URL connection for input, false if not. The default is true.

  Parameters:

  doinput - the new value.

  Throws:

  IllegalStateException - if already connected

  See Also:

  doInput,getDoInput()

• setDoOutput

  public void setDoOutput(boolean dooutput)

  Sets the value of the doOutput field for this URLConnection to the specified value.

  A URL connection can be used for input and/or output. Set the DoOutput flag to true if you intend to use the URL connection for output, false if not. The default is false.

  Parameters:

  dooutput - the new value.

  Throws:

  IllegalStateException - if already connected

  See Also:

  getDoOutput()

合起来翻译一下就是，一个URL连接可以用来输入或输出。

setDoInput(boolean doinput)如果你打算输入，则设置为ture，否则false。默认true
setDoOutput(boolean dooutput)如果你打算输出，则设置为true，否则false。默认false