The previous message only
explains how to create service, this message will describe how to
create client and invoke server side. Actually, JSR-311 only defined the server API,
so, each vendor will have different ideas on client. But one common way
is to use Apache Http Common Client lib. Please see following examples.
1. GET a customer
// Sent HTTP GET request to query customer info
System.out.println("Sent HTTP GET request to query customer info");
URL url = new URL("http://localhost:8080/vendor_search/services/customerservice/customers/123");
InputStream in = url.openStream();
System.out.println(getStringFromInputStream(in)); //NOTE, return an input stream, you need convert xml to Java Object by yourself
2. Use PUT to update a customer
System.out.println("Sent HTTP PUT request to update customer info");
Client client = new Client();
String inputFile = client.getClass().getResource("update_customer.txt").getFile();
File input = new File(inputFile);
PutMethod put = new PutMethod("http://localhost:8080/vendor_search/services/customerservice/customers");
RequestEntity entity = new FileRequestEntity(input, "text/xml; charset=ISO-8859-1");
put.setRequestEntity(entity);
HttpClient httpclient = new HttpClient();
try {
int result = httpclient.executeMethod(put);
System.out.println("Response status code: " + result);
System.out.println("Response body: ");
System.out.println(put.getResponseBodyAsString());
} finally {
// Release current connection to the connection pool once you are
// done
put.releaseConnection();
}
3. Use POST to add a customer
System.out.println("Sent HTTP POST request to add customer");
inputFile = client.getClass().getResource("add_customer.txt").getFile();
input = new File(inputFile);
PostMethod post = new PostMethod("http://localhost:8080/vendor_search/services/customerservice/customers");
post.addRequestHeader("Accept" , "text/xml");
entity = new FileRequestEntity(input, "text/xml; charset=ISO-8859-1");
post.setRequestEntity(entity);
httpclient = new HttpClient();
try {
int result = httpclient.executeMethod(post);
System.out.println("Response status code: " + result);
System.out.println("Response body: ");
System.out.println(post.getResponseBodyAsString());
} finally {
// Release current connection to the connection pool once you are
// done
post.releaseConnection();
}
So, for this way provided by Apach Common Http Client, the user still need think about the convention from XML to POJO. It is not so convenience. We will provide a utility class to simply this process.
posted on 2008-11-05 22:48
Justin Chen 閱讀(1842)
評論(0) 編輯 收藏 所屬分類:
Rest