import org.apache.http.entity.mime.MultipartEntityBuilder; //导入方法依赖的package包/类

/**

* Encodes multipart/form-data where the body content must be an instance of the {@link MultipartContent} class. Individual parts will be

* encoded using the encoders available to the {@link ChainedHttpConfig} object.

*

* @param config the chained configuration object

* @param ts the server adapter

*/

public static void multipart(final ChainedHttpConfig config, final ToServer ts) {

try {

final ChainedHttpConfig.ChainedRequest request = config.getChainedRequest();

final Object body = request.actualBody();

if (!(body instanceof MultipartContent)) {

throw new IllegalArgumentException("Multipart body content must be MultipartContent.");

}

final String contentType = request.actualContentType();

if (!(contentType.equals(MULTIPART_FORMDATA.getAt(0)) || contentType.equals(MULTIPART_MIXED.getAt(0)))) {

throw new IllegalArgumentException("Multipart body content must be multipart/form-data.");

}

final String boundary = randomString(10);

MultipartEntityBuilder entityBuilder = MultipartEntityBuilder.create().setBoundary(boundary);

final String boundaryContentType = "multipart/form-data; boundary=" + boundary;

entityBuilder.setContentType(ContentType.parse(boundaryContentType));

for (final MultipartContent.MultipartPart mpe : ((MultipartContent) body).parts()) {

if (mpe.getFileName() == null) {

entityBuilder.addTextBody(mpe.getFieldName(), (String) mpe.getContent());

} else {

final byte[] encodedBytes = EmbeddedEncoder.encode(config, mpe.getContentType(), mpe.getContent());

entityBuilder.addBinaryBody(mpe.getFieldName(), encodedBytes, parse(mpe.getContentType()), mpe.getFileName());

}

}

request.setContentType(boundaryContentType);

ts.toServer(entityBuilder.build().getContent());

} catch (IOException ioe) {

ioe.printStackTrace();

}

}