Sharepoint

• https://code.google.com/archive/p/java-sharepoint-library/

• rest api doc
• Example working with Files

Example:

• get a list: List and list items

SharepointExample.java

public class SharePointClientAuthentication {
 
public static void main(String[] args) throws Exception {
    CredentialsProvider credsProvider = new BasicCredentialsProvider();
    credsProvider.setCredentials(
            new AuthScope(AuthScope.ANY),
            new NTCredentials("username", "password", "https://hostname", "domain"));
    CloseableHttpClient httpclient = HttpClients.custom()
            .setDefaultCredentialsProvider(credsProvider)
            .build();
    try {
        HttpGet httpget = new HttpGet("http://hostname/_api/web/lists");
 
        System.out.println("Executing request " + httpget.getRequestLine());
        CloseableHttpResponse response = httpclient.execute(httpget);
        try {
            System.out.println("----------------------------------------");
            System.out.println(response.getStatusLine());
            EntityUtils.consume(response.getEntity());
        } finally {
            response.close();
        }
    } finally {
        httpclient.close();
    }
}
}

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.4.1</version>
</dependency>

• get a file: http://www.rgagnon.com/javadetails/java-get-document-sharepoint-library.html

HttpGet request = new HttpGet("/_api/web/GetFileByServerRelativeUrl('" + file + "')/$value");
CloseableHttpResponse response2 = httpclient.execute(request);
HttpEntity entity = response2.getEntity();
int rc = response2.getStatusLine().getStatusCode();
String reason = response2.getStatusLine().getReasonPhrase();
if (rc == HttpStatus.SC_OK) {
  System.out.println("Writing "+ file + " to " + targetFolder);
  File f = new File(file);
  File ff= new File(targetFolder, f.getName());  // target
  // writing the byte array into a file using Apache Commons IO
  FileUtils.writeByteArrayToFile(ff, EntityUtils.toByteArray(entity));
}