Spring RestTemplate GET with parameters

📝 Title: Making GET Requests with Parameters using Spring RestTemplate

👋 Hey there, tech enthusiasts! Today, we're going to tackle an important question: how to make GET requests with parameters using Spring RestTemplate. This common issue often baffles developers, but fear not! We're here to provide easy solutions and help you unleash the power of RestTemplate. Let's dive in! 💪

🤔 Understanding the Problem: In the given context, the developer wants to make a REST call with custom headers and query parameters. However, the current implementation using RestTemplate's exchange() method fails, as the request parameters don't seem to be sent. This leaves our developer scratching their head for ideas. But worry not, we've got you covered! 😊

🎯 Solution: To successfully make a GET request with query parameters using RestTemplate, you need to ensure that the parameters are passed correctly. Let's modify your code and see the solution in action:

HttpHeaders headers = new HttpHeaders();
headers.set("Accept", "application/json");

UriComponentsBuilder uriBuilder = UriComponentsBuilder.fromUriString(url)
        .queryParam("msisdn", msisdn)
        .queryParam("email", email)
        .queryParam("clientVersion", clientVersion)
        .queryParam("clientType", clientType)
        .queryParam("issuerName", issuerName)
        .queryParam("applicationName", applicationName);

HttpEntity<?> entity = new HttpEntity<>(headers);

ResponseEntity<String> response = restTemplate.exchange(uriBuilder.toUriString(), 
        HttpMethod.GET, entity, String.class);

// Now you can access the response using `response.getBody()`

🔍 Explanation: To fix the issue, we'll utilize the UriComponentsBuilder to build the URL with the desired query parameters. By chaining multiple queryParam() methods, we can add the required parameters to the URL.

By using uriBuilder.toUriString(), we retrieve the complete URL with the query parameters added. This modified URL is then used in the exchange() method to make the GET request.

🚀 Call-to-Action: Now that you have the solution to making GET requests with parameters using Spring RestTemplate, it's time to put this knowledge into action! 🎉 Modify your code according to the solution provided, and say goodbye to the issue of missing query parameters. Feel free to share your experience in the comments below, and don't forget to hit that share button to help fellow developers facing the same problem.

🙌 Happy coding! 💻