尝试将文件上载到 JAX-RS（球衣）服务器

file-upload java client jax-rs jersey

2022-09-04 06:26:39

我正在尝试使用泽西岛的多部分/表单数据客户端上传文件和其他表单数据。我正在上传到REST Web服务，也使用泽西岛。以下是服务器代码：

@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces(MediaType.APPLICATION_JSON)
public String create(@FormDataParam("file") InputStream file,
        @FormDataParam("file") FormDataContentDisposition fileInfo,
        @FormDataParam("name") String name,
        @FormDataParam("description") String description) {
    Ingredient ingredient = new Ingredient();
    ingredient.setName(name);
    ingredient.setDescription(description);
    ingredient.setImageName(fileInfo.getFileName());
    ingredient.setImagePath(context.getRealPath("/resources/uploads/"));
    // TODO save the file.
    try {
        JSONObject json = new JSONObject();
        try {
            ingredientService.create(ingredient);
        } catch (final InvalidParameterException ex) {
            logger.log(Level.INFO, ex.getMessage());
            json.put("result", false);
            json.put("error", ex.getMessage());
            return json.toString();
        } catch (final GoodDrinksException ex) {
            logger.log(Level.WARNING, null, ex);
            json.put("result", false);
            json.put("error", ex.getMessage());
            return json.toString();
        }
        json.put("ingredient", JsonUtil.ingredientToJSON(ingredient));
        return json.put("result", true).toString();
    } catch (JSONException ex) {
        logger.log(Level.SEVERE, null, ex);
        return "{\"result\",false}";
    }
}

我已经在桌面上使用基本的html表单测试了服务器代码，它工作正常。问题似乎出在客户端。下面是相关的客户端代码。

ClientConfig config = new DefaultClientConfig();
client = Client.create(config);
client.addFilter(new LoggingFilter());
webResource = client.resource("http://localhost:8080/webapp/resources").path("ingredient");
FormDataMultiPart fdmp = new FormDataMultiPart();
if (file != null) {
    fdmp.bodyPart(new FileDataBodyPart("file", file, MediaType.APPLICATION_OCTET_STREAM_TYPE));
}
fdmp.bodyPart(new FormDataBodyPart("name", ingredient.getName()));
fdmp.bodyPart(new FormDataBodyPart("description", ingredient.getDescription()));

ClientResponse response = webResource.type(MediaType.MULTIPART_FORM_DATA_TYPE).post(ClientResponse.class, fdmp);
String string = response.getEntity(String.class);
logger.log(Level.INFO, "response: {0}", string);

我从服务器收到 400 响应“客户端发送的请求在语法上不正确”

这是从记录器中吐出的消息，这个消息没有文件来保持输出简短：

1 > POST http://localhost:8080/webapp/resources/ingredient  
1 > Content-Type: multipart/form-data  
1 >   
--Boundary_5_1545082086_1303666703655  
Content-Type: text/plain  
Content-Disposition: form-data;name="name"  
Adam  
--Boundary_5_1545082086_1303666703655  
Content-Type: text/plain  
Content-Disposition: form-data;name="description"  
Test  
--Boundary_5_1545082086_1303666703655--

我在客户端做错了什么才能让它正常工作？

答案 1

如果要将字符串添加到仅使用方法，请将其用于文件附件的方式相同（queryParam 不起作用）。FormDataMultiPart.field("name", "value")

下面是一个工作示例：

首先，以字符串形式返回读取文件内容的服务器部分：

@Path("file")
public class FileResource {

    @POST
    @Consumes(MediaType.MULTIPART_FORM_DATA)
    public Response handleUpload(@FormDataParam("file") InputStream stream) throws Exception {
        return Response.ok(IOUtils.toString(stream)).build();
    }
}

二、客户端方法发布文件：

public void upload(String url, String fileName) {
    InputStream stream = getClass().getClassLoader().getResourceAsStream(fileName);
    FormDataMultiPart part = new FormDataMultiPart().field("file", stream, MediaType.TEXT_PLAIN_TYPE);

    WebResource resource = Client.create().resource(url);
    String response = resource.type(MediaType.MULTIPART_FORM_DATA_TYPE).post(String.class, part);
    assertEquals("Hello, World", response);
}

三、测试环境：

Server server;

@Before
public void before() throws Exception {
    server = new Server(8080);
    server.addHandler(new WebAppContext(WEB_INF_DIRECTORY, "/"));
    server.start(); 
}

@After
public void after() throws Exception {
    server.stop();
}

@Test
public void upload() {
    upload("http://localhost:8080/file", "file.txt");
}

最后，maven 依赖项：

<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.8.2</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-server</artifactId>
        <version>1.6</version>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-client</artifactId>
        <version>1.6</version>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey.contribs</groupId>
        <artifactId>jersey-multipart</artifactId>
        <version>1.6</version>
    </dependency>
    <dependency>
        <groupId>org.mortbay.jetty</groupId>
        <artifactId>jetty-embedded</artifactId>
        <version>6.1.26</version>
    </dependency>
    <dependency>
        <groupId>commons-io</groupId>
        <artifactId>commons-io</artifactId>
        <version>2.0.1</version>
    </dependency>
</dependencies>

位于类路径的根目录下，并包含。file.txtHello, World

答案 2

Yves解决方案在客户端对我不起作用。我环顾四周，发现：

其中没有一种可以与我现在的球衣1.18一起使用（见下面的pom摘录）。大多数麻烦都在客户端。我会收到这样的错误消息：

com.sun.jersey.api.client.ClientHandlerException: javax.ws.rs.WebApplicationException: java.lang.IllegalArgumentException: Missing body part entity of type 'text/plain'
at com.sun.jersey.client.urlconnection.URLConnectionClientHandler.handle(URLConnectionClientHandler.java:155)
at com.sun.jersey.api.client.Client.handle(Client.java:652)
at com.sun.jersey.api.client.WebResource.handle(WebResource.java:682)

服务器端使用此代码快速工作（尚未对上传的输入流执行任何有趣的操作 - 适合您的需求）

@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces("text/plain")
public Response uploadFile(
        @FormDataParam("content") final InputStream uploadedInputStream,
        @FormDataParam("fileName") String fileName) throws IOException {
    String uploadContent=IOUtils.toString(uploadedInputStream);
    return Response.ok(uploadContent).build();
}

客户端将使用此代码：

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;   
import javax.ws.rs.core.MediaType;

import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.multipart.FormDataBodyPart;
import com.sun.jersey.multipart.FormDataMultiPart;
/**
 * upload the given file
 * 
 * inspired by
 * http://neopatel.blogspot.de/2011/04/jersey-posting-multipart-data.html
 * 
 * @param url
 * @param uploadFile
 * @return the result
 * @throws IOException
 */
public String upload(String url, File uploadFile) throws IOException {
    WebResource resource = Client.create().resource(url);
    FormDataMultiPart form = new FormDataMultiPart();
    form.field("fileName", uploadFile.getName());
    FormDataBodyPart fdp = new FormDataBodyPart("content",
            new FileInputStream(uploadFile),
            MediaType.APPLICATION_OCTET_STREAM_TYPE);
    form.bodyPart(fdp);
    String response = resource.type(MediaType.MULTIPART_FORM_DATA).post(String.class, form);
    return response;
}

绒球.xml提取物：

<properties>
  <jersey.version>1.18</jersey.version>
</properties>

<dependency>
  <groupId>com.sun.jersey</groupId>
  <artifactId>jersey-server</artifactId>
  <version>${jersey.version}</version>
</dependency>
<dependency>
  <groupId>com.sun.jersey</groupId>
  <artifactId>jersey-client</artifactId>
  <version>${jersey.version}</version>
</dependency>
<!--  Multipart support -->
<dependency>
  <groupId>com.sun.jersey.contribs</groupId>
  <artifactId>jersey-multipart</artifactId>
  <version>${jersey.version}</version>
</dependency>