how to read file sent from http post in jersy

问题:

this code i tested for values

@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces(MediaType.TEXT_PLAIN)
public String getE(@FormDataParam("file") InputStream inputStream,@FormDataParam("file") FormDataContentDisposition fileMetaData) {
    String out = "";
    Map<String, String> l = fileMetaData.getParameters();
    Collection<String> s = l.values();
    Iterator i = s.iterator();
    while(i.hasNext())
    {
        out += i.next()+"      ";
    }

return out; }

i am getting this exception

SEVERE: StandardWrapper.Throwable org.glassfish.jersey.server.model.ModelValidationException: Validation of the application resource model has failed during application initialization. [[FATAL] No injection source found for a parameter of type public java.lang.String my.Service.getE(java.io.InputStream,org.glassfish.jersey.media.multipart.FormDataContentDisposition) at index 0.; source='ResourceMethod{httpMethod=POST, consumedTypes=[multipart/form-data], producedTypes=[text/plain], suspended=false, suspendTimeout=0, suspendTimeoutUnit=MILLISECONDS, invocable=Invocable{handler=ClassBasedMethodHandler{handlerClass=class my.Service, handlerConstructors=[org.glassfish.jersey.server.model.HandlerConstructor@4023c98]}, definitionMethod=public java.lang.String my.Service.getE(java.io.InputStream,org.glassfish.jersey.media.multipart.FormDataContentDisposition), parameters=[Parameter [type=class java.io.InputStream, source=file, defaultValue=null], Parameter [type=class org.glassfish.jersey.media.multipart.FormDataContentDisposition, source=file, defaultValue=null]], responseType=class java.lang.String}, nameBindings=[]}']

Dependencies are

<dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>3.8.1</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.39</version>
    </dependency>
    <dependency>
        <groupId>org.glassfish.jersey</groupId>
        <artifactId>jersey-bom</artifactId>
        <version>2.16</version>
        <type>pom</type>
    </dependency>
    <dependency>
        <groupId>org.glassfish.jersey.containers</groupId>
        <artifactId>jersey-container-servlet</artifactId>
        <version>2.16</version>
    </dependency>
<dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-moxy</artifactId>
        <version>2.17</version>
    </dependency>
    <dependency>
        <groupId>com.googlecode.json-simple</groupId>
        <artifactId>json-simple</artifactId>
        <version>1.1.1</version>
    </dependency>
    <dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-multipart</artifactId>
        <version>2.16</version>
    </dependency>

my service class

@Path("empdata")

public class Service {

EmpService service = new EmpService();
@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces(MediaType.TEXT_PLAIN)
public String getE(@FormDataParam("file") InputStream inputStream,@FormDataParam("file") FormDataContentDisposition fileMetaData) {
    String out = "";
    Map<String, String> l = fileMetaData.getParameters();
    Collection<String> s = l.values();
    Iterator i = s.iterator();
    while(i.hasNext())
    {
        out += i.next()+"      ";
    }
    return out;//
}

}

and i registered my ResourceConfig sub class

this is how i am sending request and file this is how my request header and body part looks like Thanks!

回答1:

Adding Jersey multipart dependecy

To use multipart features in your Jersey application, you need to add the jersey-media-multipart module to your pom.xml file:

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-multipart</artifactId>
    <version>2.23.1</version>
</dependency>

If you're not using Maven make sure to have all needed dependencies (see the jersey-media-multipart artifact dependencies) on the classpath.

Registering the multipart feature

Besides adding the dependency, you need to register the MultiPartFeature. See the approaches below:

If you have an Application/ResourceConfig sub-class, do as following:

@ApplicationPath("/api")
public class MyApplication extends Application {

    @Override
    public Set<Class<?>> getClasses() {
        Set<Class<?>> classes = new HashSet<Class<?>>();
        classes.add(MultipartFeature.class);
        return classes;
    }
}

@ApplicationPath("/api")
public class MyApplication extends ResourceConfig {

    public MyApplication() {
        register(MultipartFeature.class);
    }
}

If you don't have an Application/ResourceConfig sub-class, you can register the MultiPartFeature in your web.xml deployment descriptor. The specific resource, provider and feature fully-qualified class names can be provided in a comma-separated value of jersey.config.server.provider.classnames initialization parameter.

<init-param>
    <param-name>jersey.config.server.provider.classnames</param-name>
    <param-value>org.glassfish.jersey.media.multipart.MultiPartFeature</param-value>
</init-param>

Handling multipart requests

Use the @FormDataParam annotation to bind the named body part(s) of a multipart/form-data request entity body to a resource method parameter, as following:

@POST
@Path("/upload")
@Consumes(MediaType.MULTIPART_FORM_DATA)
public Response upload(@FormDataParam("file") InputStream inputStream,
                       @FormDataParam("file") FormDataContentDisposition fileMetaData) {
    ...
}

---

For more details, check the Jersey documentation about multipart requests.