java – URLConnection setRequestProperty vs addRequestProperty

Let me say I'm talking about HTTP to a web server. I will accept HTML or text, but I prefer HTML In other words, the title should say (I think!)

Accept: text / HTML, text /*

I use Java, so I have a urlconnection Should I use it

myUrlConnction.setRequestProperty("Accept","text/html");
myUrlConnction.addRequestProperty("Accept","text/*");

or

myUrlConnction.setRequestProperty("Accept","text/html,text/*");

Or is it equivalent?

Generally speaking, most of the third-party code I see doesn't seem to worry about the sorting or multiple values of these header files, so I want to know how to work in the end

Solution

The first snippet will result in two accept headers, while the second snippet will give two selectors an accept header

They are actually equivalent

The specification also states that more specific media coverage has priority, so both will produce your expected behavior

If you must specify multiple media ranges and they are equally specific, you can add the Q parameter

Source: http 1.1 specification（ http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html )：