servlet set cookie secure?

javax.servlet.http.Cookie implements java.lang.Cloneable

In Cookie method, there is a method call "setSecure" , what does it us开发者_StackOverflow社区e for? if i setSecure(true), is there anything i need to do on my client(javascript) side to read the cookie? what is different set/without setSecure?

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All that setSecure(true) does is tell the browser that the cookie should only be sent back to the server if using a "secure" protocol, like https. Your JavaScript code doesn't have to do anything different.

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Yup this ensures that your session cookie is not visible to an attacker like man-in-the-middle attack. Instead of setting it manually You could alternatively configure your web.xml to handle it for you automatically.

<session-config>
   <cookie-config>
      <secure>true</secure>
   </cookie-config>
</session-config>