1. 带附件的POST提交
最开始都是使用MultipartPostMethod这个类,现在已经废弃这个类了。API说明: Deprecated. Use
MultipartRequestEntity
in conjunction with PostMethod
instead. 使用PostMethod可以实现的功能,就没有必要再弄一个MultipartPostMethod了。下面是一段最简单的示例:



















这是针对一般的form形式的提交,而且这个form里面不带附件的。如果带附件,那么这种方法就不起作用,附件上传的参数和普通参数无法一同在服务器获取到。org.apache.commons.httpclient.methods.multipart 这个包就是为处理文件上传这种多形式参数的情况的。最主要的类是Part(代表一种post object),它有二个比较重要的子类:FilePart和StringPart,一个是文件的参数,另一个就是普通的文本参数。它的典型使用方法如下:



























在第二行PostMethod postMethod = new PostMethod();后面,有人说需要使用postMehtod.setRequestHeader("Content-type", "multipart/form-data"); Content-type的请求类型进行更改。但是我在使用过程没有加上这一句,查了一下httpCleint的默认Content-type是application/octet-stream。应该是没有影响的。对于MIME类型的请求,httpclient建议全用MulitPartRequestEntity进行包装,就是上面的用法。
2. 参数中文的处理问题
httpclient的默认编码都是ISO-8859-1,那肯定就无法支持中文参数了。引用一下这篇文章:http://thinkbase.net/w/main/Wiki?HttpClient+POST+%E7%9A%84+UTF-8+%E7%BC%96%E7%A0%81%E9%97%AE%E9%A2%98,按照作者的说法,就可以正常解决中文编码的问题。其中最关键的是修改EncodingUtil这个类的一个方法实现。另外,FilePart和StringPart的构造方法都有一个带编码指定的参数,为了减少问题的出现,建议所有的都带上统一的编码,包括postMethod.getParams()。示例如下:




























httpclient笔记(二)
不多说了,直接上示例:
A服务器:
msURL为:http://192.168.7.203:8080
- /**
- * 发送文件到另一台服务器B
- *
- * @param File file 附件
- * @param serviceType服务类型
- * @param spId id
- * @return
- */
- public String sendApply(File file, String serviceType, String spId) {
- String fromAgentResult = "";
- HttpClient client = new HttpClient();
- PostMethod filePost = new PostMethod(msUrl+"?serviceType="+serviceType+"&spId="+spId+"&type=menu");
- // MultipartPostMethod filePost = new MultipartPostMethod(msUrl);
- // 若上传的文件比较大 , 可在此设置最大的连接超时时间
- client.getHttpConnectionManager(). getParams().setConnectionTimeout(8000);
- try {
- FilePart fp = new FilePart(file.getName(), file);
- MultipartRequestEntity mrp= new MultipartRequestEntity(new Part[]{fp}, filePost.getParams());
- filePost.setRequestEntity(mrp);
- //使用系统提供的默认的恢复策略
- filePost.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
- new DefaultHttpMethodRetryHandler());
- int httpStat = client.executeMethod(filePost);
- System.out.println("httpStat----"+httpStat);
- if (!(httpStat == HttpStatus.SC_OK)) {
- fromAgentResult = "connected fail:" + httpStat;
- } else if (httpStat == HttpStatus.SC_OK) {
- try {
- DocumentBuilderFactory factory = DocumentBuilderFactory
- .newInstance();
- DocumentBuilder builder = factory.newDocumentBuilder();
- Document doc = builder
- .parse(filePost.getResponseBodyAsStream());
- doc.normalize();
- // NodeList optypeNL= doc.getElementsByTagName("optype");
- NodeList resultNL = doc.getElementsByTagName("result");
- // fromAgentOptype=
- // optypeNL.item(0).getFirstChild().getNodeValue();
- fromAgentResult = resultNL.item(0).getFirstChild()
- .getNodeValue();
- System.out.println("发送请求完毕,接收状态:"+fromAgentResult);
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- } catch (HttpException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- } catch (IOException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- filePost.releaseConnection();
- return fromAgentResult;
- }
- /**
- * 发送文件到另一台服务器B
- *
- * @param File file 附件
- * @param serviceType服务类型
- * @param spId id
- * @return
- */
- public String sendApply(File file, String serviceType, String spId) {
- String fromAgentResult = "";
- HttpClient client = new HttpClient();
- PostMethod filePost = new PostMethod(msUrl+"?serviceType="+serviceType+"&spId="+spId+"&type=menu");
- // MultipartPostMethod filePost = new MultipartPostMethod(msUrl);
- // 若上传的文件比较大 , 可在此设置最大的连接超时时间
- client.getHttpConnectionManager(). getParams().setConnectionTimeout(8000);
- try {
- FilePart fp = new FilePart(file.getName(), file);
- MultipartRequestEntity mrp= new MultipartRequestEntity(new Part[]{fp}, filePost.getParams());
- filePost.setRequestEntity(mrp);
- //使用系统提供的默认的恢复策略
- filePost.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
- new DefaultHttpMethodRetryHandler());
- int httpStat = client.executeMethod(filePost);
- System.out.println("httpStat----"+httpStat);
- if (!(httpStat == HttpStatus.SC_OK)) {
- fromAgentResult = "connected fail:" + httpStat;
- } else if (httpStat == HttpStatus.SC_OK) {
- try {
- DocumentBuilderFactory factory = DocumentBuilderFactory
- .newInstance();
- DocumentBuilder builder = factory.newDocumentBuilder();
- Document doc = builder
- .parse(filePost.getResponseBodyAsStream());
- doc.normalize();
- // NodeList optypeNL= doc.getElementsByTagName("optype");
- NodeList resultNL = doc.getElementsByTagName("result");
- // fromAgentOptype=
- // optypeNL.item(0).getFirstChild().getNodeValue();
- fromAgentResult = resultNL.item(0).getFirstChild()
- .getNodeValue();
- System.out.println("发送请求完毕,接收状态:"+fromAgentResult);
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- } catch (HttpException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- } catch (IOException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- filePost.releaseConnection();
- return fromAgentResult;
- }
/**
* 发送文件到另一台服务器B
*
* @param File file 附件
* @param serviceType服务类型
* @param spId id
* @return
*/
public String sendApply(File file, String serviceType, String spId) {
String fromAgentResult = "";
HttpClient client = new HttpClient();
PostMethod filePost = new PostMethod(msUrl+"?serviceType="+serviceType+"&spId="+spId+"&type=menu");
// MultipartPostMethod filePost = new MultipartPostMethod(msUrl);
// 若上传的文件比较大 , 可在此设置最大的连接超时时间
client.getHttpConnectionManager(). getParams().setConnectionTimeout(8000);
try {
FilePart fp = new FilePart(file.getName(), file);
MultipartRequestEntity mrp= new MultipartRequestEntity(new Part[]{fp}, filePost.getParams());
filePost.setRequestEntity(mrp);
//使用系统提供的默认的恢复策略
filePost.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
new DefaultHttpMethodRetryHandler());
int httpStat = client.executeMethod(filePost);
System.out.println("httpStat----"+httpStat);
if (!(httpStat == HttpStatus.SC_OK)) {
fromAgentResult = "connected fail:" + httpStat;
} else if (httpStat == HttpStatus.SC_OK) {
try {
DocumentBuilderFactory factory = DocumentBuilderFactory
.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder
.parse(filePost.getResponseBodyAsStream());
doc.normalize();
// NodeList optypeNL= doc.getElementsByTagName("optype");
NodeList resultNL = doc.getElementsByTagName("result");
// fromAgentOptype=
// optypeNL.item(0).getFirstChild().getNodeValue();
fromAgentResult = resultNL.item(0).getFirstChild()
.getNodeValue();
System.out.println("发送请求完毕,接收状态:"+fromAgentResult);
} catch (Exception e) {
e.printStackTrace();
}
}
} catch (HttpException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
filePost.releaseConnection();
return fromAgentResult;
}
B服务器接收:
- boolean bl = false;
- System.out.println("接收文件开始--------------");
- String serviceType = request.getParameter("serviceType");
- String spId = request.getParameter("spId");
- String type = request.getParameter("type");
- if (type.equals("menu")) {
- DiskFileUpload fu = new DiskFileUpload();
- fu.setSizeMax(1000000);
- List fileItems;
- try {
- fileItems = fu.parseRequest(request);
- Iterator itr = fileItems.iterator();
- while (itr.hasNext()) {
- FileItem fi = (FileItem) itr.next();
- if (!fi.isFormField()) {
- System.out.println("/nNAME: " + fi.getName());
- System.out.println("SIZE: " + fi.getSize());
- try {
- String newFileName = msu.updateName(Integer
- .parseInt(serviceType), spId);
- System.out.println("newFileName---------------"
- + newFileName);
- File fNew = new File(applyFilePath, newFileName);
- fi.write(fNew);
- bl = msu.acceptApply(Integer.parseInt(serviceType),
- spId, newFileName);
- System.out.println(fNew.getAbsolutePath());
- } catch (Exception e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- } else {
- System.out.println("Field =" + fi.getFieldName());
- }
- }
- } catch (FileUploadException e1) {
- // TODO Auto-generated catch block
- e1.printStackTrace();
- }
- }
- boolean bl = false;
- System.out.println("接收文件开始--------------");
- String serviceType = request.getParameter("serviceType");
- String spId = request.getParameter("spId");
- String type = request.getParameter("type");
- if (type.equals("menu")) {
- DiskFileUpload fu = new DiskFileUpload();
- fu.setSizeMax(1000000);
- List fileItems;
- try {
- fileItems = fu.parseRequest(request);
- Iterator itr = fileItems.iterator();
- while (itr.hasNext()) {
- FileItem fi = (FileItem) itr.next();
- if (!fi.isFormField()) {
- System.out.println("/nNAME: " + fi.getName());
- System.out.println("SIZE: " + fi.getSize());
- try {
- String newFileName = msu.updateName(Integer
- .parseInt(serviceType), spId);
- System.out.println("newFileName---------------"
- + newFileName);
- File fNew = new File(applyFilePath, newFileName);
- fi.write(fNew);
- bl = msu.acceptApply(Integer.parseInt(serviceType),
- spId, newFileName);
- System.out.println(fNew.getAbsolutePath());
- } catch (Exception e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- } else {
- System.out.println("Field =" + fi.getFieldName());
- }
- }
- } catch (FileUploadException e1) {
- // TODO Auto-generated catch block
- e1.printStackTrace();
- }
- }
boolean bl = false;
System.out.println("接收文件开始--------------");
String serviceType = request.getParameter("serviceType");
String spId = request.getParameter("spId");
String type = request.getParameter("type");
if (type.equals("menu")) {
DiskFileUpload fu = new DiskFileUpload();
fu.setSizeMax(1000000);
List fileItems;
try {
fileItems = fu.parseRequest(request);
Iterator itr = fileItems.iterator();
while (itr.hasNext()) {
FileItem fi = (FileItem) itr.next();
if (!fi.isFormField()) {
System.out.println("/nNAME: " + fi.getName());
System.out.println("SIZE: " + fi.getSize());
try {
String newFileName = msu.updateName(Integer
.parseInt(serviceType), spId);
System.out.println("newFileName---------------"
+ newFileName);
File fNew = new File(applyFilePath, newFileName);
fi.write(fNew);
bl = msu.acceptApply(Integer.parseInt(serviceType),
spId, newFileName);
System.out.println(fNew.getAbsolutePath());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} else {
System.out.println("Field =" + fi.getFieldName());
}
}
} catch (FileUploadException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
- //下面是返回执行结果
- //下面是返回执行结果
//下面是返回执行结果
- msu.responseToAS(response, bl);
- System.out.println("接收申请处理完毕,状态:" + bl);
- return null;
- msu.responseToAS(response, bl);
- System.out.println("接收申请处理完毕,状态:" + bl);
- return null;
msu.responseToAS(response, bl);
System.out.println("接收申请处理完毕,状态:" + bl);
return null;
- //msu.responseToAS
- //msu.responseToAS
//msu.responseToAS
- public void responseToAS(HttpServletResponse response, boolean synSuccess) {
- try {
- PrintWriter out = response.getWriter();
- if (synSuccess)
- out
- .println("<?xml version=/"1.0/" encoding=/"UTF-8/"?><root><result>ok</result></root>");
- else
- out
- .println("<?xml version=/"1.0/" encoding=/"UTF-8/"?><root><result>fail</result></root>");
- } catch (IOException e) {
- e.printStackTrace();
- System.out.println("responseToAS--error");
- }
- }