How does a curl command translate to Java code?

Question

I was able to locate some solutions, but none have worked for me. I am new to Java and have had no success so far with curl in Java.

curl -X POST -H "Content-Type: application/json" -o output.json --data-binary @input.json http://webaddress.com

The JSON file.

{
   "firstNumber": "00",
   "secondNumber": "12",
   "Type": "MyType",
   "data": [0,0,0,0,0]
}

Any help would be really appreciated.

Are you asking how to launch curl from java or how to replicate the functionality of curl in java? — bradimus, Nov 23 '16 at 17:47
Possible duplicate of [convert curl call into java urlconnection call](http://stackoverflow.com/questions/15684846/convert-curl-call-into-java-urlconnection-call) — Nikolas Charalambidis, Nov 23 '16 at 17:49
I am asking how to replicate the actions of that curl command using Java code. — konopoly, Nov 23 '16 at 18:16

score 0 · Answer 1 · answered Nov 23 '16 at 17:51

The easiest way is to invoke the command from java:

Process proc = 
    run.exec(new String[] {
     "/bin/sh", 
     "-c",
     "curl -X POST -H 'Content-Type: application/json' -o output.json --data-binary @input.json http://webaddress.com"
    });

/bin/sh is the location of your shell. -c executes the commands after.

Of course, move your command to some kind of string constant and also you may extract a utility method for executing commands, if your shell path will remain the same.

score 0 · Answer 2 · answered Nov 23 '16 at 20:26

0

I've had good experience with Spring's RestTemplate, here's a sample:

JSONObject request = new JSONObject();
request.put("attribute1", "value");
request.put("attribute2", "value2");

RestTemplate restTemplate=new RestTemplate();
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
HttpEntity<String> entity = new HttpEntity<String>(request.toString(), headers);

ResponseEntity<String> loginResponse = restTemplate.exchange(urlString, HttpMethod.POST, entity, String.class);

answered Nov 23 '16 at 20:26

Daniel Arechiga

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7
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thanks for the reply, this look like a string is being sent. How would i change this to use the --data-binary from the curl command. – konopoly Nov 23 '16 at 20:37
you would read the file and convert it to String if the file contains raw Json. – Daniel Arechiga Nov 23 '16 at 20:42

How does a curl command translate to Java code?

2 Answers2

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