How to convert UriComponentsBuilder to java.net.URI

Question

The documentation for UriComponentsBuilder suggest that it is possible, but not straightforward to convert to a java.net.URI.

The following seems to work, but involves an intermediate serialization by toUriString().

UriComponentsBuilder uriBuilder = UriComponentsBuilder.fromUriString(origin+base);
java.net.URI uri = null;
try {
    uri = new URI(uriBuilder.toUriString());
}
catch (Exception e) {}                                                              // TODO: insanity
String response = restTemplate.getForObject(uri,String.class);

The constructor for java.net.URI declares a throw:

java.net.URISyntaxException; must be caught or declared to be thrown

Is there a nice way of doing this that doesn't require dealing with exceptions?

A really helpful answer might provide some insight as to why build has different return types depending on the input type.

Answer 1

A new UriComponentsBuilder class helps to create UriComponents instances by providing fine-grained control over all aspects of preparing a URI including construction, expansion from template variables, and encoding.

The {type} bind to queryParam in path.

 URI uri = UriComponentsBuilder.newInstance().scheme("http").host("docuconv.claztec.net")
                .path("/cgi/{type}")
                .queryParam("path", file.getDownloadUrl())
                .queryParam("realname", file.getName())
                .queryParam("servicecode", file.getServiceCode())
                .queryParam("useragent", file.getUserAgent())
                .queryParam("charset", file.getCharset())
                .queryParam("format", file.getOption())
                .build().expand(file.getType())
                .encode()
                .toUri();

UriComponentsBuilder