在RESTful Web服务中添加删除方法

Question

I am making my first RESTful web service (using MySQL). But I don't know how to remove records from a table by id.

This is what I have done so far:

1. Search for a person by id and return the result(id, full name and age) in XML format:

    private PersonDao personDao = new PersonDao(); //method which return a single person in xml @GET @Path("/getPersonByIdXML/{id}") @Produces(MediaType.APPLICATION_XML) public Person getPersonByIdXML(@PathParam("id")int id){ return personDao.getPersonById(id); } // return JSON response 

2. Search for a person by id and return the result(id, full name and age) in JSON format:

    @GET @Path("/getPersonByIdJSON/{id}") @Produces(MediaType.APPLICATION_JSON) public Person getPersonById(@PathParam("id")int id){ return personDao.getPersonById(id); } 

3. Output all persons and return the result(id, full name and age) in JSON format:

    // the method returns list of all persons @GET @Path("/getAllPersonsInXML") @Produces(MediaType.APPLICATION_XML) public List<Person> getAllPersonsInXML(){ return personDao.getAllPersons(); } 

4. Insert a person in the database:

    //insert @GET @Path("/insertPerson/{fullName}/{age}") @Produces(MediaType.APPLICATION_JSON) public String saveNewPerson(@PathParam("fullName") String fullName, @PathParam("age") int age) { Person person = new Person(); person.setFullName(fullName); person.setAge(age); if (!personDao.savePerson(person)) { return "{\\"status\\":\\"ok\\"} id="+person.getId(); } else { return "{\\"status\\":\\"not ok\\"}"; } } 

5. Edit a person in the database:

    //update @GET @Path("/insertPerson/{id}/{fullName}/{age}") @Produces(MediaType.APPLICATION_JSON) public String updatePerson(@PathParam("id") int id, @PathParam("fullName") String fullName, @PathParam("age") int age) { Person person = new Person(); person.setId(id); person.setFullName(fullName); person.setAge(age); if (!personDao.savePerson(person)) { return "{\\"status\\":\\"ok\\"}"; } else { return "{\\"status\\":\\"not ok\\"}"; } } 

Answer 1

If you want a DELETE resource:

@DELETE
@Path("/{id}")
public void deleteById(@PathParam("id")int id){
   personDao.deleteById(id);
}

As long as you have the deleteById method constructed then Thanks it!

Suggestions:

• Your insert is a GET. Should really be a POST since you are creating something.
• Your update is a GET. Should really be a PUT. Have fun and keep at it!!

Answer 2

this method for getPersonById:

    public Person getPersonById(int id) {
    Person person = null;
    Session session = null;

    try {
        session = sessionFactory.openSession();
        session.beginTransaction();
        person = (Person) session.createQuery("from Person p where p.id = :ID").setParameter("ID", id).uniqueResult();
        session.getTransaction().commit();
    } catch (Exception ex) {
        if (session != null) {
            session.getTransaction().rollback();
        }
    } finally {
        if (session != null) {
            session.close();
        }
    }
    return person;
}

this method for Delete:

    public void deleteById(int id) {
    Person person = null;
    Session session = null;
    try {
        session = sessionFactory.openSession();
        session.beginTransaction();
        person = (Person) session.createQuery("delete Person p where p.id = :ID");
        session.getTransaction().commit();
    } catch (Exception ex) {
        if (session != null) {
            session.getTransaction().rollback();
        }
    } finally {
        if (session != null) {
            session.close();
        }
    }
}

deleteById not work, output error 204 No Content, how do correct method for deleteById, thanks