java模拟post进行文件提交 采用httpClient方法

package com.jd.vd.manage.util.filemultipart;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.Charset;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.DefaultHttpClient;

public class Test {

public static void main(String[] args) throws ClientProtocolException, IOException {
MultipartEntity multipartEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE,"--------------------HV2ymHFg03ehbqgZCaKO6jyH", Charset.defaultCharset());
multipartEntity.addPart("ram",new StringBody("4654646", Charset.forName("UTF-8")));
multipartEntity.addPart("key",new StringBody("123456",Charset.forName("UTF-8")));
multipartEntity.addPart("from",new StringBody("cw",Charset.forName("UTF-8")));
multipartEntity.addPart("file",new FileBody(new File("D:/upload/JDELOG.txt")));

HttpPost request = new HttpPost("http://localhost:8080/sdkServlet");
request.setEntity(multipartEntity);
request.addHeader("Content-Type","multipart/form-data; boundary=--------------------HV2ymHFg03ehbqgZCaKO6jyH");

DefaultHttpClient httpClient = new DefaultHttpClient();
HttpResponse response =httpClient.execute(request);
InputStream is = response.getEntity().getContent();
BufferedReader in = new BufferedReader(new InputStreamReader(is));
StringBuffer buffer = new StringBuffer();
String line = "";
while ((line = in.readLine()) != null) {
buffer.append(line);
}
System.out.println("发送消息收到的返回："+buffer.toString());
}
}