应用程序部分：

注意：要载入commons-httpclient-3.1.jar commons-codec.jar commons-logging.jar这三个包

import java.io.File;    import org.apache.commons.httpclient.HttpClient;  import org.apache.commons.httpclient.HttpStatus;  import org.apache.commons.httpclient.methods.PostMethod;  import org.apache.commons.httpclient.methods.multipart.FilePart;  import org.apache.commons.httpclient.methods.multipart.MultipartRequestEntity;  import org.apache.commons.httpclient.methods.multipart.Part;    public class Hclient  {  public static void main(String args[])  {     String targetURL = null;// TODO 指定URL     File targetFile = null;// TODO 指定上传文件         targetFile = new File("1.mp3");     targetURL = "http://localhost:8080/test/tt"; //servleturl     PostMethod filePost = new PostMethod(targetURL);         try     {        //通过以下方法可以模拟页面参数提交      //filePost.setParameter("name", "中文");      //filePost.setParameter("pass", "1234");       Part[] parts = { new FilePart(targetFile.getName(), targetFile) };      filePost.setRequestEntity(new MultipartRequestEntity(parts,filePost.getParams()));      HttpClient client = new HttpClient();      client.getHttpConnectionManager().getParams().setConnectionTimeout(5000);      int status = client.executeMethod(filePost);      if (status == HttpStatus.SC_OK)      {       System.out.println("上传成功");       // 上传成功      }      else      {       System.out.println("上传失败");       // 上传失败      }     }     catch (Exception ex)     {      ex.printStackTrace();     }     finally     {      filePost.releaseConnection();     }  }  }