HttpClient4文件上传

httpclient上传文件实际上就是模拟一个http的表单提交请求。 

 package test.httpclient4;

 import java.io.File;
 import java.io.IOException;

 import org.apache.http.HttpEntity;
 import org.apache.http.HttpResponse;
 import org.apache.http.HttpStatus;
 import org.apache.http.client.ClientProtocolException;
 import org.apache.http.client.HttpClient;
 import org.apache.http.client.methods.HttpPost;
 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;
 import org.apache.http.util.EntityUtils;

 public class SendFile {

     public static void main(String[] args) throws ClientProtocolException,
             IOException {
         HttpClient httpclient = new DefaultHttpClient();
         //请求处理页面
         HttpPost httppost = new HttpPost(
                 "http://localhost:8080/webtools/upload.jsp");
         //创建待处理的文件
         FileBody file = new FileBody(new File("d:/22.rar"));
         //创建待处理的表单域内容文本
         StringBody descript = new StringBody("0431.la");

         //对请求的表单域进行填充
         MultipartEntity reqEntity = new MultipartEntity();
         reqEntity.addPart("file", file);
         reqEntity.addPart("descript", descript);
         //设置请求
         httppost.setEntity(reqEntity);
         //执行
         HttpResponse response = httpclient.execute(httppost);
         //HttpEntity resEntity = response.getEntity();
         //System.out.println(response.getStatusLine());
         if(HttpStatus.SC_OK==response.getStatusLine().getStatusCode()){
             HttpEntity entity = response.getEntity();
             //显示内容
             if (entity != null) {
                 System.out.println(EntityUtils.toString(entity));
             }
             if (entity != null) {
                 entity.consumeContent();
             }
         }
     }
 }

这里说明一下 需要一个额外的包，apache 的mime4j 的lib。