如何在REST Web服务中传递自定义对象 [英] How to pass a custom object in REST webservice

问题描述

我在将自定义对象传输到客户端时遇到问题.如何将自定义对象传输到客户端并将其接收回Web服务?我正在按块传输文件.我想知道我应该怎么写我的客户.我尝试在客户端中将其作为MediaType.APPLICATION_JSON传递，但是没有任何结果，这意味着它不会传递回Web服务.下面是一些正在处理的代码.

i'm having problems transfering a custom object to the client. How can i transfer a custom object to the client and receive it back to the webservice? i'm transferring a file by chunks. i want to know how i should write my client. i tried passing it as MediaType.APPLICATION_JSON in client but i get no result meaning it doesn't get passed back to the webservice. Below is a bit of code im working on.

网络服务

 @POST
    @Path("/fileTransfer")
    @Consumes({MediaType.APPLICATION_JSON})
    @Produces({MediaType.APPLICATION_JSON})
    public final TransferInfomation transferInfo(final FileModel file)
{
...
}

...(一些代码)(只说一个 syso )

...(some code)(lets just say a syso)

FileModel类

public class FileModel {

private String fileID;
private DataHandler dataHandler;

/**
 * Constructor.
 */
public FileModel() {
}

(让我们假设创建了setter和getters)

(lets assume setters and getters are made)

(不确定Web服务是否正确).还在学习REST，我想知道客户端应该如何.

(Not sure if the webservice is correct). Still learning REST, i want to know how the client should be.

提前谢谢.

推荐答案

在Jersey中封送"和解组"自定义对象"(JSON，XML等)的一种好方法是使用JAXB( https://jaxb.java.net/).

A good way to "marshal" and "unmarshal" "custom objects" (in JSON, XML, etc.) in Jersey is to use JAXB (https://jaxb.java.net/).

要执行此操作，您需要创建一个"jaxb类"，并带有适当的getter和setter(和注释)，例如:

To do this you need to create a "jaxb class", with the proper getters and setters (and annotations), e.g.:

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class FileModel{

    private String fileID;
    private DataHandler dataHandler;

    public String getFileID(){
        return fileID;
    }

    public void setFileID(String fileID){
        this.fileID = fileID;
    }

    public DataHandler getDataHandler(){
        return dataHandler;
    }

    public void setDataHandler(DataHandler dataHandler){
        this.dataHandler = dataHandler;
    }

}

不要忘记声明@XmlRootElement.然后，您可以简单地在API端点(方法)中声明和使用这些对象:

Do not forget to declare the @XmlRootElement. Then you can simply declare and use these objects in your API endpoints (methods):

@POST
@Path("/fileTransfer")
@Consumes({MediaType.APPLICATION_JSON})
@Produces({MediaType.APPLICATION_JSON})
public final FileModel transferInfo(FileModel file)
{
    // read file in "FileModel" format
    // ... make several operations
    // return new FileModel (or another format if you will)
}

这应该有效.确保在客户端正确遵循为FileModel定义的数据结构.此处查看有关如何在泽西岛处理该问题的示例:

This should work. Make sure you follow the data structure defined for FileModel correctly in the client side. See here a example on how to handle that in Jersey: How do I POST a Pojo with Jersey Client without manually convert to JSON? (where JAXB is also used).

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