How to send PUT request with JSON using HttpClient?Ĭheck out: PUT REQUEST using another popular API testing Framework – REST ASSURED.In this tutorial, we are going to cover below topics: PUT Request using Java 11 HttpClient API.!!! Click To Tweet Now, in this example, we are going to see “How to send a PUT request with JSON as request body using Java 11 HttpClient API?”. If you haven’t checked that, lets check ‘Sending GET Request’ by clicking this link and also check ‘Sending POST request’ using this link. We went through different classes and interfaces in package and created some sample HTTP requests.So far, we have covered sending a GET & POST Request in our tutorial on Java 11 HttpClient API. We are generating five random numbers between 1 and 100 and mapping them to URL’s and then creating HttpRequest for each URL and making requests with HttpClient, finally displaying the body content in the console. Output 91 is the atomic number of protactinium.ģ3 is the temperature at which water boils according to the Newton scale.ĥ8 is the minimum wind speed (mph ) needed to issue a Severe Thunderstorm Warning.ġ7 is the number of flames emanating from the grenade cap-badge of the Grenadier Guards.Ĩ is the number of principles of Yong in Chinese calligraphy. Lets make five HttpRequests with random numbers. Now we have completed all three actions for a HTTP transaction now lets enhance this using Java streams. In the above code snippet I made two HTTP calls (sync and async) for number 5 so there are two lines. responds with a random interesting fact about the provided number. Output 5 is the number of dots in a quincunx.ĥ is the number of permanent members with veto power on the United Nations Security Council. build () //sync call HttpResponse response = HttpClient. Body handlers are used to indicate the response type from the HTTP server, for example response can be a simple string, byte stream or it can be a file to download so BodyHandlers builds the instance of HttpResponse, this is the reason HttpResponse is an interface and BodyHandler will create its instance based on the response type.īelow contains two code snippets to handle response with send and sendAsync HttpRequest request = HttpRequest. ![]() Send and sendAsync methods in the HttpClient takes the request and Body handlers. We will use this object in the below section. Both send and sendAsync methods we return HttpResponse object. We can make an asynchronous call by using sendAsync method like below HttpClient. send is a synchronous call means this method will block the thread until the response receives from the server. We will discuss about body handlers in the next section below. send method will take request and body handler instances. NewHttpClient is a static method which will return an instance of HttpClient and we called send method on it. Below code snippet will send the request and returns the HTTPResponse. HTTPClient class is used to send and get the request and responses from the HTTP server. Once we have request then we can pass it to HTTPClient. If needed this request object can be cached to use multiple times. We called build on it to get HttpRequest object. NewBuilder is a static method which will take a URI of the HTTP request and creates a Builder object. This class contains all the functionality to handle HTTP requests some of them are like request URL, request headers, HTTP protocol version and request types (GET, POST, PUT). HttpRequest class represents the request object. ![]() ![]() Lets go through each of this action in below sections Create HTTP request We need to do below three actions to complete a full HTTP request This package provides all the required classes and interfaces to make a HTTP request. This package provides a high-level interfaces to HTTP and low-level interfaces to Websockets. In Java 11 HttpClient has moved from incubator module to base module under the package. This program will hit a HTTP end point at This end point will take a number and returns an interesting fact about the given number. In this article I will give a simple introduction of HttpClient class and then will use this class to develop a small HTTP program.
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