v3 API Java Code Example

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// using SendGrid's Java Library
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// https://github.com/sendgrid/sendgrid-java
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import com.sendgrid.*;
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import com.sendgrid.helpers.mail.*;
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import com.sendgrid.helpers.mail.objects.*;
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import java.io.IOException;
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public class Example {
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  public static void main(String[] args) throws IOException {
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    Email from = new Email("test@example.com");
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    String subject = "Sending with SendGrid is Fun";
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    Email to = new Email("test@example.com");
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    Content content = new Content("text/plain", "and easy to do anywhere, even with Java");
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    Mail mail = new Mail(from, subject, to, content);
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    SendGrid sg = new SendGrid(System.getenv("SENDGRID_API_KEY"));
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    Request request = new Request();
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    try {
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      request.setMethod(Method.POST);
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      request.setEndpoint("mail/send");
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      request.setBody(mail.build());
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      Response response = sg.api(request);
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      System.out.println(response.getStatusCode());
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      System.out.println(response.getBody());
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      System.out.println(response.getHeaders());
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    } catch (IOException ex) {
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      throw ex;
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    }
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  }
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}