$.post,$.get, and $.getjson are the three types of jQuery requests

1. $. Get refers to the data submitted by get method. The usage: $. Get (url,data,callback)

$.get("../saveUser.action",{
'userId':123,
'userCode':'123'
},function(data)){}

2. $.post refers to post submission. Generally speaking, it is relatively safe.

$.post("../saveUser.action",{
'userId':123,
'userCode':'123'
},function(data)){}

3. $. GetJSON is also submitted according to the get method, but $. GetJSON supports cross-domain, and its usage is basically the same as $.

$.getJSON("../saveUser.action?callback=?",{
'userId':123,
'userCode':'123'
},function(data)){}