Check HTTP Response Status for Success

All HTTP 2xx mean successful status codes.

So, it's fairly easy to check, but a bit harder to not duplicate those checks everywhere:)

##Code Samples: ###General universal way:

if (statusCode < 200 || statusCode > 299) {
    // throws, redirects, server errors, lions and tigers and bears! 
}

###The simplest java way:

if (statusCode / 100 != 2) {
    // throws, redirects, server errors, lions and tigers and bears! 
}

status codes are integers, so this expression will be an integer division.

###No Magic Numbers way:

if (Response.Status.fromStatusCode(statusCode).getFamily() 
        != Response.Status.Family.SUCCESSFUL) {
    // throws, redirects, server errors, lions and tigers and bears! 
}

###No Magic Numbers Spring way:

if (!HttpStatus.valueOf(statusCode).is2xxSuccessful()) {
    // throws, redirects, server errors, lions and tigers and bears! 
}

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see Also

• All Http Status Codes
• Spring 4 API - HttpStatus
• Java EE 7 API - Response.Status
• Apache Commons - HttpStatus
• REST (Restful Web Services)
• Themeleaf - Offsite
• Web Resource Optimizer for Java
• Wro4j - Github
• Keynote: Top JS frmeworks 2015