GET,POST都是向服务器传数据。说get是向服务器获取数据，而post是向服务器传递数据。其实是英文文档翻译的时候断章取义了，文档中可出这点。
The HTML specifications technically define the difference between "GET" and "POST" so that former means that form data is to be encoded (by a browser) into a URL while the latter means that the form data is to appear within a message body. But the specifications also give the usage recommendation that the "GET" method should be used when the form processing is "idempotent", and in those cases only. As a simplification, we might say that "GET" is basically for just getting (retrieving) data whereas "POST" may involve anything, like storing or updating data, or ordering a product, or sending E-mail.
HTML规范在技术上定义了“GET”和“POST”之间的区别，前者意味着表单数据将(通过浏览器)编码成URL，而后者意味着表单数据将出现在消息正文中。但是规范也给出了使用建议，当表单处理是“幂等”时，应该使用“GET”方法，并且仅在那些情况下。作为一种简化，我们可以说“GET”基本上是为了获取(检索)数据，而“POST”可能涉及到存储或更新数据、订购产品或发送电子邮件等任何事情。
所以一般GET使用传个ID值给服务器，让服务器通过ID取出数据，返回给客户端。
用户填写的数据，都用POST方法上传
但是实际开发中 不用这么细化.因为get不安全,大多都用post。