HttpClient通过Post上传文件

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：

[java] view
plaincopy

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&quot;,
    "test.xml","test.zip","D://test");
    }

}

服务端代码：

[java] view
plaincopy

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