通过HTTP POST上传文件
我想使用HTTP POST将文件（特定于图像）上传到REST服务器。 我已经导入/添加到构建路径httpmime-4.3.1.jar和apache-mime4j-0.6.jar 。 我在堆栈跟踪中得到以下错误。
这有效吗？ post.setHeader("enctype", "multipart/form-data");
HTTP POST代码
public void multiPartPost() throws ClientProtocolException, IOException { File image = new File(EXTERNALSTORAGE + "/Pictures/sample.jpg"); FileBody fileBody = new FileBody(image); HttpClient client = new DefaultHttpClient(); HttpPost post = new HttpPost(url); post.setHeader("enctype", "multipart/form-data"); MultipartEntityBuilder multipartEntity = MultipartEntityBuilder.create(); multipartEntity.setMode(HttpMultipartMode.BROWSER_COMPATIBLE); multipartEntity.addPart("sampleImage", fileBody); post.setEntity(multipartEntity.build()); HttpResponse response = client.execute(post); String responseBody = EntityUtils.toString(response.getEntity()); Log.v("multiPartPost HTTP Response", responseBody); }
堆栈跟踪
01-05 17:41:25.470: W/dalvikvm(6564): VFY: unable to resolve static field 1755 (DEFAULT_BINARY) in Lorg/apache/http/entity/ContentType; 01-05 17:41:25.470: D/dalvikvm(6564): VFY: replacing opcode 0x62 at 0x0000 01-05 17:41:25.470: I/dalvikvm(6564): Could not find method org.apache.http.entity.ContentType.create, referenced from method org.apache.http.entity.mime.content.FileBody. 01-05 17:41:25.470: W/dalvikvm(6564): VFY: unable to resolve static method 6613: Lorg/apache/http/entity/ContentType;.create (Ljava/lang/String;)Lorg/apache/http/entity/ContentType; 01-05 17:41:25.470: D/dalvikvm(6564): VFY: replacing opcode 0x71 at 0x0000 01-05 17:41:25.470: I/dalvikvm(6564): Could not find method org.apache.http.entity.ContentType.create, referenced from method org.apache.http.entity.mime.content.FileBody. 01-05 17:41:25.470: W/dalvikvm(6564): VFY: unable to resolve static method 6614: Lorg/apache/http/entity/ContentType;.create (Ljava/lang/String;Ljava/lang/String;)Lorg/apache/http/entity/ContentType; 01-05 17:41:25.470: D/dalvikvm(6564): VFY: replacing opcode 0x71 at 0x0000 01-05 17:41:25.470: W/dalvikvm(6564): VFY: unable to find class referenced in signature (Lorg/apache/http/entity/ContentType;) 01-05 17:41:25.470: W/dalvikvm(6564): VFY: unable to find class referenced in signature (Lorg/apache/http/entity/ContentType;) 01-05 17:41:25.478: W/dalvikvm(6564): VFY: unable to find class referenced in signature (Lorg/apache/http/entity/ContentType;) 01-05 17:41:25.478: W/dalvikvm(6564): VFY: unable to find class referenced in signature (Lorg/apache/http/entity/ContentType;) 01-05 17:41:25.478: I/dalvikvm(6564): Could not find method org.apache.http.util.Args.notNull, referenced from method org.apache.http.entity.mime.content.FileBody. 01-05 17:41:25.478: W/dalvikvm(6564): VFY: unable to resolve static method 6808: Lorg/apache/http/util/Args;.notNull (Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object; 01-05 17:41:25.478: D/dalvikvm(6564): VFY: replacing opcode 0x71 at 0x0005 01-05 17:41:25.478: I/dalvikvm(6564): Could not find method org.apache.http.util.Args.notNull, referenced from method org.apache.http.entity.mime.content.FileBody.writeTo 01-05 17:41:25.478: W/dalvikvm(6564): VFY: unable to resolve static method 6808: Lorg/apache/http/util/Args;.notNull (Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object; 01-05 17:41:25.478: D/dalvikvm(6564): VFY: replacing opcode 0x71 at 0x0002 01-05 17:41:25.478: I/dalvikvm(6564): Could not find method org.apache.http.entity.ContentType.parse, referenced from method org.apache.http.entity.mime.content.AbstractContentBody. 01-05 17:41:25.478: W/dalvikvm(6564): VFY: unable to resolve static method 6618: Lorg/apache/http/entity/ContentType;.parse (Ljava/lang/String;)Lorg/apache/http/entity/ContentType; 01-05 17:41:25.486: D/dalvikvm(6564): VFY: replacing opcode 0x71 at 0x0000 01-05 17:41:25.486: W/dalvikvm(6564): VFY: unable to find class referenced in signature (Lorg/apache/http/entity/ContentType;) 01-05 17:41:25.486: I/dalvikvm(6564): Could not find method org.apache.http.util.Args.notNull, referenced from method org.apache.http.entity.mime.content.AbstractContentBody. 01-05 17:41:25.486: W/dalvikvm(6564): VFY: unable to resolve static method 6808: Lorg/apache/http/util/Args;.notNull (Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object; 01-05 17:41:25.486: D/dalvikvm(6564): VFY: replacing opcode 0x71 at 0x0005 01-05 17:41:25.486: I/dalvikvm(6564): Could not find method org.apache.http.entity.ContentType.getCharset, referenced from method org.apache.http.entity.mime.content.AbstractContentBody.getCharset 01-05 17:41:25.486: W/dalvikvm(6564): VFY: unable to resolve virtual method 6616: Lorg/apache/http/entity/ContentType;.getCharset ()Ljava/nio/charset/Charset; 01-05 17:41:25.486: D/dalvikvm(6564): VFY: replacing opcode 0x6e at 0x0002 01-05 17:41:25.486: W/dalvikvm(6564): VFY: unable to find class referenced in signature (Lorg/apache/http/entity/ContentType;) 01-05 17:41:25.486: I/dalvikvm(6564): Could not find method org.apache.http.entity.ContentType.getMimeType, referenced from method org.apache.http.entity.mime.content.AbstractContentBody.getMediaType 01-05 17:41:25.486: W/dalvikvm(6564): VFY: unable to resolve virtual method 6617: Lorg/apache/http/entity/ContentType;.getMimeType ()Ljava/lang/String; 01-05 17:41:25.486: D/dalvikvm(6564): VFY: replacing opcode 0x6e at 0x0002 01-05 17:41:25.493: I/dalvikvm(6564): Could not find method org.apache.http.entity.ContentType.getMimeType, referenced from method org.apache.http.entity.mime.content.AbstractContentBody.getMimeType 01-05 17:41:25.493: W/dalvikvm(6564): VFY: unable to resolve virtual method 6617: Lorg/apache/http/entity/ContentType;.getMimeType ()Ljava/lang/String; 01-05 17:41:25.493: D/dalvikvm(6564): VFY: replacing opcode 0x6e at 0x0002 01-05 17:41:25.493: I/dalvikvm(6564): Could not find method org.apache.http.entity.ContentType.getMimeType, referenced from method org.apache.http.entity.mime.content.AbstractContentBody.getSubType 01-05 17:41:25.493: W/dalvikvm(6564): VFY: unable to resolve virtual method 6617: Lorg/apache/http/entity/ContentType;.getMimeType ()Ljava/lang/String; 01-05 17:41:25.493: D/dalvikvm(6564): VFY: replacing opcode 0x6e at 0x0002 01-05 17:41:25.493: W/dalvikvm(6564): threadid=11: thread exiting with uncaught exception (group=0x40dc51f8) 01-05 17:41:25.501: E/AndroidRuntime(6564): FATAL EXCEPTION: AsyncTask #1 01-05 17:41:25.501: E/AndroidRuntime(6564): java.lang.RuntimeException: An error occured while executing doInBackground() 01-05 17:41:25.501: E/AndroidRuntime(6564): at android.os.AsyncTask$3.done(AsyncTask.java:287) 01-05 17:41:25.501: E/AndroidRuntime(6564): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273) 01-05 17:41:25.501: E/AndroidRuntime(6564): at java.util.concurrent.FutureTask.setException(FutureTask.java:124) 01-05 17:41:25.501: E/AndroidRuntime(6564): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307) 01-05 17:41:25.501: E/AndroidRuntime(6564): at java.util.concurrent.FutureTask.run(FutureTask.java:137) 01-05 17:41:25.501: E/AndroidRuntime(6564): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:217) 01-05 17:41:25.501: E/AndroidRuntime(6564): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) 01-05 17:41:25.501: E/AndroidRuntime(6564): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) 01-05 17:41:25.501: E/AndroidRuntime(6564): at java.lang.Thread.run(Thread.java:856) 01-05 17:41:25.501: E/AndroidRuntime(6564): Caused by: java.lang.NoClassDefFoundError: org.apache.http.entity.ContentType 01-05 17:41:25.501: E/AndroidRuntime(6564): at org.apache.http.entity.mime.content.FileBody.(FileBody.java:89) 01-05 17:41:25.501: E/AndroidRuntime(6564): at com.medusa.checkit.HTTPPostRequest.multiPartPost(HTTPPostRequest.java:79) 01-05 17:41:25.501: E/AndroidRuntime(6564): at com.medusa.checkit.MenuActivity$BackgroundTask.doInBackground(MenuActivity.java:79) 01-05 17:41:25.501: E/AndroidRuntime(6564): at com.medusa.checkit.MenuActivity$BackgroundTask.doInBackground(MenuActivity.java:1) 01-05 17:41:25.501: E/AndroidRuntime(6564): at android.os.AsyncTask$2.call(AsyncTask.java:273) 01-05 17:41:25.501: E/AndroidRuntime(6564): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 01-05 17:41:25.501: E/AndroidRuntime(6564): ... 5 more
你似乎错过了依赖。
我在类路径中使用了commons-lang3-3.1和commons-logging-1.1.2 jar的httpclient-4.2.5 ， httpcleint-cache-4.2.5 ， httpcore-4.2.4和httpmime-4.2.5 。
我还使用entity.addPart(formFieldName, new FileBody(file, "image/jpeg")); 而不是使用标头属性。
请查看Internet媒体类型以获取更多详细信息