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",

"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();

}

}

传送过程中涉及中文乱码问题暂时没有解决留到后续完成