doGet和doPost的区别

最新推荐文章于 2021-01-15 11:31:01 发布

原创最新推荐文章于 2021-01-15 11:31:01 发布 · 1.1k 阅读

0 ·

CC 4.0 BY-SA版权

Java技术专栏收录该内容

19 篇文章

订阅专栏

本文详细对比了HTTP请求方法GET与POST的区别。GET方法适合用于从服务器检索信息，并体现在URL中，而POST则适用于向服务器发送数据，没有长度限制且更安全。文章还探讨了两种方法在实际应用中的具体场景。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

get和post的区别并非在地址栏中看到的那么简单，二者的不同来自于协议本身。向服务器发送请求的形式不同。

GET/zl/login.jsp?username=vonzhou&password=vonzhou HTTP/1.1(CRLF)

Host:127.0.0.1

......

Connection: keep-alive

POST /zl/login.jsp HTTP/1.1(CRLF)

Host:127.0.0.1

......

Connection: keep-alive(CRLF)

(CRLF)

username=vonzhou&password=vonzhou

另外，

doGet is used when there is are requirement of sending dataappended to a query string in the URL. The doGet models the GET methodof Http and it is used to retrieve the info on the client from some server as arequest to it.The doGet cannot be used to send too much info appended as a querystream. GET puts the form values into the URL string. GET is limited toabout 256 characters (usually a browser limitation) and creates reallyugly URLs.

POST allows you to have extremely dense forms and pass that to theserver without clutter or limitation in size. e.g. you obviously can'tsend a file from the client to the server via GET. POST has no limit on the amount of data you can send and because the data does not show up on the URL you can send passwords. But this does not mean that POST is truly secure. For real security you have to lookintoencryption which is an entirely different topic