基于Java中两种jersey文件上传方式

以下是关于Java中使用Jersey实现文件上传的两种方法的详细攻略：

1. 使用FormDataMultiPart方式上传文件

实现步骤

1. 添加Jersey依赖

在pom.xml中添加以下依赖：

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-multipart</artifactId>
    <version>2.33</version>
</dependency>

1. 实现POST接口

在控制器中实现POST接口，在其中通过FormDataMultiPart类处理文件上传，将上传的文件保存到指定路径。

@Path("/fileUploader")
public class FileUploader {

    @POST
    @Path("/uploadFile")
    @Consumes(MediaType.MULTIPART_FORM_DATA)
    public Response uploadFile(FormDataMultiPart form) throws IOException {
        FormDataBodyPart filePart = form.getField("file");
        ContentDisposition contentDisposition = filePart.getContentDisposition();
        String fileName = contentDisposition.getFileName();
        InputStream fileInputStream = filePart.getValueAs(InputStream.class);
        File targetFile = new File("/fileDirectory" + fileName);
        Files.copy(fileInputStream, targetFile.toPath());
        return Response.ok("File uploaded successfully.").build();
    }
}

示例

以下示例代码实现了使用FormDataMultiPart方式上传文件：

public class FileUploadTest {

    public static void main(String[] args) {
        File file = new File("test.jpg");
        FormDataMultiPart form = new FormDataMultiPart();
        form.bodyPart(new FileDataBodyPart("file", file, MediaType.APPLICATION_OCTET_STREAM_TYPE));
        Client client = ClientBuilder.newClient();
        WebTarget target = client.target("http://localhost:8080/fileUploader/uploadFile");
        Response response = target.request().post(Entity.entity(form, MediaType.MULTIPART_FORM_DATA));
        System.out.println(response.getStatus());
        response.close();
    }
}

2. 使用InputStream方式上传文件

实现步骤

1. 实现POST接口

在控制器中实现POST接口，在其中通过InputStream类处理文件上传，将上传的文件保存到指定路径。

@Path("/fileUploader")
public class FileUploader {

    @POST
    @Path("/uploadFile")
    @Consumes(MediaType.APPLICATION_OCTET_STREAM)
    public Response uploadFile(InputStream fileInputStream, @HeaderParam("Content-Disposition") String contentDisposition) throws IOException {
        String fileName = contentDisposition.replaceFirst("(?i)^.*filename=\"?([^\"]+)\"?.*$", "$1");
        File targetFile = new File("/fileDirectory" + fileName);
        Files.copy(fileInputStream, targetFile.toPath());
        return Response.ok("File uploaded successfully.").build();
    }
}

示例

以下示例代码实现了使用InputStream方式上传文件：

public class FileUploadTest {

    public static void main(String[] args) throws FileNotFoundException {
        File file = new File("test.jpg");
        String uploadUrl = "http://localhost:8080/fileUploader/uploadFile";
        Client client = ClientBuilder.newClient();
        WebTarget target = client.target(uploadUrl);
        InputStream inputStream = new FileInputStream(file);
        FormDataContentDisposition contentDisposition = FormDataContentDisposition.name("file").fileName(file.getName()).build();
        Response response = target.request(MediaType.APPLICATION_OCTET_STREAM)
                .header(HttpHeaders.CONTENT_DISPOSITION, contentDisposition)
                .post(Entity.entity(inputStream, MediaType.APPLICATION_OCTET_STREAM_TYPE));
        System.out.println(response.getStatus());
        response.close();
    }
}

希望以上内容对您有所帮助。