HttpClient通過Post上傳文件的實例代碼

在之前一段的項目中，使用Java模仿Http Post方式發送參數以及文件，單純的傳遞參數或者文件可以使用URLConnection進行相應的處理。

但是項目中涉及到既要傳遞普通參數，也要傳遞多個文件（不是單純的傳遞XML文件）。在網上尋找之後，發現是使用HttClient來進行響應的操作，起初嘗試多次依然不能傳遞參數和傳遞文件，後來發現時因為當使用HttpClient時，不能使用request.getParameter()對普通參數進行獲取，而要在服務器端使用Upload來進行操作。

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

客戶端代碼：

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:[email protected]"> Geray</a> 
* @version 1.0,2012-6-12 
*/ 
public class HttpPostArgumentTest2 { 
//file1與file2在同一個文件夾下 filepath是該文件夾指定的路徑 
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為請求後台的File upload;屬性 
reqEntity.addPart("file2", bin2);//file2為請求後台的File upload;屬性 
reqEntity.addPart("filename1", comment);//filename1為請求後台的普通參數;屬性 
httppost.setEntity(reqEntity); 
HttpResponse response = httpclient.execute(httppost); 
int statusCode = response.getStatusLine().getStatusCode(); 
if(statusCode == HttpStatus.SC_OK){ 
System.out.println("服務器正常響應....."); 
HttpEntity resEntity = response.getEntity(); 
System.out.println(EntityUtils.toString(resEntity));//httpclient自帶的工具類讀取返回數據 
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"); 
} 
} 

服務端代碼：

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 { // 獲取上傳文件的值 
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("讀取http請求屬性值出錯!"); 
// e.printStackTrace(); 
logger.error("讀取http請求屬性值出錯"); 
} 
// 數據處理 
try { 
out = response.getWriter(); 
out.print("{success:true, msg:'接收成功'}"); 
out.close(); 
} catch (IOException e) { 
e.printStackTrace(); 
} 
} 

以上所述是小編給大家介紹的HttpClient通過Post上傳文件的實例代碼，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對本站網站的支持！