Spring Boot REST Template URI Encoding

Hard coding a URI endpoint for the Rest template interface is preferably the first point of reference when implementing a micro service or a monolith application.

There is no easy way to do this!

URI variables are usually meant for path elements, query string parameters, or when you decouple your application from your front-end. Ideally, you’d find a better solution for constructing your URI to access data on various endpoints. But, after doing a couple of endpoint hits, you’ll probably run into a funny looking error like

**org.springframework.web.client.ResourceAccessException: I/O error: **http://localhost:8080%api%users

Regardless of all the research, the URI package comes in quite handy with String Builder to Query a API. There are a few ways of implementing this:

Java

StringBuilder builder = new StringBuilder("http://localhost:8080/api/users");
URI uri = URI.create(builder.toString());
List<Users> updatedUsers = restTemplate.getForObject(uri, List.class);

This returns a list of users on a GET request in the Rest Template. If you’re using the POST request, append your parameters in a string builder like in the snippet below:

Java

StringBuilder builder = new StringBuilder("http://localhost:8080/api/adduser");
        builder.append("?username=");
builder.append(URLEncoder.encode("john@1.com",StandardCharsets.UTF_8.toString()));
        builder.append("&password=");
        builder.append(URLEncoder.encode("P@$$word",StandardCharsets.UTF_8.toString()));
        builder.append("&phone=");
        builder.append(URLEncoder.encode("911",StandardCharsets.UTF_8.toString()));
  URI uri = URI.create(urlencoded);
restTemplate.postForObject(uri, Users.class);

If using special characters, you might want to use the URL encoder on specific charsets. In this case, we’re using UTF_8. This is a huge question mark around just submitting a hard coded URL or how the Rest template behaves.

OR the easiest way is to simply just submit an object on a hard coded URI for your POST Query.

#java #high-perf #spring boot #microservice #spring mvc #tips & # tricks #url encoder / decoder

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Spring Boot REST Template URI Encoding