如何从泽西客户端程序向 post 方法提交多个实体?

2022-01-21 00:00:00 rest multipartform-data web-services java jersey

我正在尝试将多个实体传递给 Web 服务方法.web服务方法有两个pojo实体类型参数.我只能将一个实体发布到 Web 服务方法.我无法将多个实体发布到 Web 服务方法.

I am trying to pass multiple entities to the web service method. The web service method has two parameters of pojo entity type. I am able to post only one entity to the web service method. I am unable to post multiple entities to the web service method.

        Server side code:

        @POST
        @Path("/test")
        @Produces(MediaType.APPLICATION_XML)
        @Consumes(MediaType.APPLICATION_XML)
        public void testMethod(Emp emp, Student stud){
        ...
        }

        Client side code:
        ...
    ...
Emp emp = new Emp;
Student stud = new Student();
        ClientResponse response = resource.type(MediaType.APPLICATION_XML).entity(emp).entity(stud).post(ClientResponse.class);

推荐答案

一个请求只能有一个实体主体，这就是限制的原因.我能想到的唯一选择是使用 multipart request，你可以有多个身体部位.

A request can only have one entity body, that's why the restriction. The only option I can think of is to use multipart request, where you can have multiple body parts.

示例服务器端

@Path("multipart")
public class MultipartResource {

    @POST
    @Consumes(MediaType.MULTIPART_FORM_DATA)
    public Response doPost(@FormDataParam("emp") Emp emp,
                           @FormDataParam("student") Student student) {
        StringBuilder builder = new StringBuilder();
        builder.append("Emp:").append(emp.name).append("
");
        builder.append("Student:").append(student.name).append("
");
        return Response.ok(builder.toString()).build();
    }

    public static class Student {
        public String name;
    }

    public static class Emp {
        public String name;
    }
}

客户端

public class Main {
    public static void main(String[] args) throws Exception {
        Client client = Client.create();

        Emp emp = new Emp();
        emp.name = "pee";

        Student stu = new Student();
        stu.name = "skillet";

        FormDataMultiPart multipart = new FormDataMultiPart()
                .field("emp", emp, MediaType.APPLICATION_JSON_TYPE)
                .field("student", stu, MediaType.APPLICATION_JSON_TYPE);

        final String url = "http://localhost:8080/api/multipart";
        String response = client.resource(url).type(MediaType.MULTIPART_FORM_DATA_TYPE)
                .post(String.class, multipart);
        System.out.println(response);   
    }
}

结果:

Emp:小便
学生:煎锅

Emp:pee
Student:skillet

多部分支持的泽西依赖关系.

Jersey dependency for multipart support.

<dependency>
    <groupId>com.sun.jersey.contribs</groupId>
    <artifactId>jersey-multipart</artifactId>
    <version>${jersey1.version}</version>
</dependency>

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