在 Java 客户端中使用协议缓冲区对 RESTful 请求进行结构支持

import com.mathworks.mps.client.MATLABException;
import com.mathworks.mps.client.MWDefaultMarshalingRules;
import com.mathworks.mps.client.rest.MATLABParams;
import com.mathworks.mps.client.rest.MATLABResult;

import java.io.IOException;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;


class StudentMarshaller extends MWDefaultMarshalingRules {
    @Override
    public List<Class> getStructTypes() {
        List structType = new ArrayList();
        structType.add(Student.class);
        return structType;
    }
}


public class SortStudentsSyncREST {
	final static protected String CONTENT_TYPE = "application/x-google-protobuf";

    public static void main(String[] args) {

        //Creating a Student Array
        Student[] students = new Student[]{new Student("Toni Miller", 90, "A"),
                new Student("Ed Plum", 80, "B+"),
                new Student("Mark Jones", 85, "A-")};

        // Use the java.net package's URLConnection as HTTP Client in this example
        try {
            String mpsBaseUrl = "http://localhost:9910";
            URL url;
            url = new URL(mpsBaseUrl + "/sortstudents/sortstudents");
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            urlConnection.setDoOutput(true);
            //Content-Type needs to be set to protobuf
            urlConnection.setRequestProperty("Content-Type", CONTENT_TYPE);


            // This class makes the initial POST request body.
            MATLABParams mlMakeBody = MATLABParams.newInstance(1, Student[].class,
                                                               new StudentMarshaller(), new Object[]{students});

            // Write the MATLABParams object into the output stream of the HTTP request.
            OutputStream output = urlConnection.getOutputStream();
            output.write(mlMakeBody.getRequestBody());
            output.flush();

            // Parse the response body of the above HTTP request with the help of MATLABResult. The newInstance method
            // here also takes MATLABParams object that was initially created.
            // If there is any error in MATLAB, call to getResult() will throw MATLABException which contains 
            // the error message displayed in MATLAB.
            MATLABResult mlFinalResult = MATLABResult.newInstance(mlMakeBody, urlConnection.getInputStream());
            Student[] magicSq = (Student[]) mlFinalResult.getResult();
            for (Student student :
                    magicSq) {
                System.out.println(student);
            }

        } catch (Exception e) {
            e.printStackTrace();
        } 

    }
}

class Student {
    String name;
    int score;
    String grade;

    public Student() {
    }

    public Student(String name, int score, String grade) {
        this.name = name;
        this.score = score;
        this.grade = grade;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getScore() {
        return score;
    }

    public void setScore(int score) {
        this.score = score;
    }

    public String getGrade() {
        return grade;
    }

    public void setGrade(String grade) {
        this.grade = grade;
    }

    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", score=" + score +
                ", grade='" + grade + '\'' +
                '}';
    }
}