HttpClient通过Post上传文件（转）

在之前一段的项目中，使用Java模仿Http Post方式发送参数以及文件，单纯的传递参数或者文件可以使用URLConnection进行相应的处理。

          但是项目中涉及到既要传递普通参数，也要传递多个文件（不是单纯的传递XML文件）。在网上寻找之后，发现是使用HttClient来进行响应的操作，起初尝试多次依然不能传递参数和传递文件，后来发现时因为当使用HttpClient时，不能使用request.getParameter()对普通参数进行获取，而要在服务器端使用Upload来进行操作。

          HttpClient4.2 jar下载 ：http://download.csdn.net/detail/just_szl/4370574

         客户端代码：

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.ParseException;
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.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

/**
 *
 * @author <a href="mailto:just_szl@hotmail.com"> Geray</a>
 * @version 1.0,2012-6-12
 */
public class HttpPostArgumentTest2 {

    //file1与file2在同一个文件夹下 filepath是该文件夹指定的路径
    public void SubmitPost(String url,String filename1,String filename2, String filepath){

        HttpClient httpclient = new DefaultHttpClient();

        try {

            HttpPost httppost = new HttpPost(url);

            FileBody bin = new FileBody(new File(filepath + File.separator + filename1));

            FileBody bin2 = new FileBody(new File(filepath + File.separator + filename2));

            StringBody comment = new StringBody(filename1);

            MultipartEntity reqEntity = new MultipartEntity();

            reqEntity.addPart("file1", bin);//file1为请求后台的File upload;属性
             reqEntity.addPart("file2", bin2);//file2为请求后台的File upload;属性
             reqEntity.addPart("filename1", comment);//filename1为请求后台的普通参数;属性
            httppost.setEntity(reqEntity);

            HttpResponse response = httpclient.execute(httppost);


            int statusCode = response.getStatusLine().getStatusCode();


            if(statusCode == HttpStatus.SC_OK){

                System.out.println("服务器正常响应.....");

                HttpEntity resEntity = response.getEntity();


                System.out.println(EntityUtils.toString(resEntity));//httpclient自带的工具类读取返回数据



                System.out.println(resEntity.getContent());

                EntityUtils.consume(resEntity);
            }

            } catch (ParseException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } finally {
                try {
                    httpclient.getConnectionManager().shutdown();
                } catch (Exception ignore) {

                }
            }
        }


    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub

        HttpPostArgumentTest2 httpPostArgumentTest2 = new HttpPostArgumentTest2();

        httpPostArgumentTest2.SubmitPost("http://127.0.0.1:8080/demo/receiveData.do",
                "test.xml","test.zip","D://test");
    }

}

服务端代码：

public void receiveData(HttpServletRequest request, HttpServletResponse response) throws AppException{

        PrintWriter out = null;
        response.setContentType("text/html;charset=UTF-8");

        Map map = new HashMap();
        FileItemFactory factory = new DiskFileItemFactory();
        ServletFileUpload upload = new ServletFileUpload(factory);
        File directory = null;
        List<FileItem> items = new ArrayList();
        try {
            items = upload.parseRequest(request);
            // 得到所有的文件
            Iterator<FileItem> it = items.iterator();
            while (it.hasNext()) {
                FileItem fItem = (FileItem) it.next();
                String fName = "";
                Object fValue = null;
                if (fItem.isFormField()) { // 普通文本框的值
                    fName = fItem.getFieldName();
//                  fValue = fItem.getString();
                    fValue = fItem.getString("UTF-8");
                    map.put(fName, fValue);
                } else { // 获取上传文件的值
                    fName = fItem.getFieldName();
                    fValue = fItem.getInputStream();
                    map.put(fName, fValue);
                    String name = fItem.getName();
                    if(name != null && !("".equals(name))) {
                        name = name.substring(name.lastIndexOf(File.separator) + 1);

//                      String stamp = StringUtils.getFormattedCurrDateNumberString();
                        String timestamp_Str = TimeUtils.getCurrYearYYYY();
                        directory = new File("d://test");
                             directory.mkdirs();

                        String filePath = ("d://test")+ timestamp_Str+ File.separator + name;
                        map.put(fName + "FilePath", filePath);

                        InputStream is = fItem.getInputStream();
                        FileOutputStream fos = new FileOutputStream(filePath);
                        byte[] buffer = new byte[1024];
                        while (is.read(buffer) > 0) {
                            fos.write(buffer, 0, buffer.length);
                        }
                        fos.flush();
                        fos.close();
                        map.put(fName + "FileName", name);
                    }
                }
            }
        } catch (Exception e) {
            System.out.println("读取http请求属性值出错!");
//          e.printStackTrace();
            logger.error("读取http请求属性值出错");
        }

        // 数据处理




        try {
            out = response.getWriter();
            out.print("{success:true, msg:'接收成功'}");
            out.close();
        } catch (IOException e) {
            e.printStackTrace();
        }


    }

http://blog.csdn.net/Just_szl/article/details/7659347