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这篇文章主要介绍了HttpClient通过Post上传文件的实例代码的相关资料,非常不错,具有参考借鉴价值,需要的朋友可以参考下
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();
- }
- }
以上所述是小编给大家介绍的HttpClient通过Post上传文件的实例代码,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对PHPERZ网站的支持!
来源: http://www.phperz.com/article/17/0917/348404.html