集团需求管理系统通过网状网与给各省公司需求管理系统进行交互。落地方为发起方提供访问的URL，发起方使用HTTP POST方法发送请求报文并得到应答报文，发起方作为落地方的HTTP客户端，落地方作为发起方的HTTP服务器。因此，各个参与方需要同时实现HTTP客户端以及服务器的功能。

在HTTP传输过程中，HTTP Header部分需要遵循下面的约定:

在请求报文中：content-type=multipart/form-data

在应答报文中：content-type=multipart/mixed

HTTP交易报文需要遵循以下约定，报文头的parameter名为“xmlhead”；报文体的parameter名为“xmlbody”。

 

落地方即服务端代码

写一个servlet

<servlet>

<servlet-name>PlatFormFilter</servlet-name>

<servlet-class>com.asiainfo.aibsm.platform.inter.PlatFormServlet</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>PlatFormFilter</servlet-name>

<url-pattern>/platformService</url-pattern>

</servlet-mapping>

 

在PlatFormServlet.java 的doPost(HttpServletRequest req, HttpServletResponse resp)方法中写一下逻辑

Map<String, Object> params = new HashMap<String, Object>();

FileItemFactory factory = new DiskFileItemFactory();//具体使用参考我的博客

ServletFileUpload upload = new ServletFileUpload(factory);

List items = upload.parseRequest( req );

Iterator iter = items.iterator();

while (iter.hasNext()) 

{

FileItem item = (FileItem) iter.next();

if (item.isFormField()) 

{

String name = item.getFieldName();

String value = item.getString("UTF-8");

params.put( name.toUpperCase(), value.trim());

} 

}

 

String xmlhead = params.get( "XMLHEAD" ).toString();//报文头

String xmlbody = params.get( "XMLBODY" ).toString();//报文体

 

String responsXML = srv.getResponsesXML( xmlhead , xmlbody ); //  获取返回报文

//回复报文

this.log.info("应答报文：" + responsXML);

resp.setContentType("multipart/mixed");

resp.setCharacterEncoding("utf-8");

resp.getWriter().write( responsXML );

 

 

发起方即客户端代码

public static String postUrl( String url, Map<String,String> xmlheadMap, String xmlbody )

{

PostMethod post = null;

String respon = null;

String xmlhead = null;

try

{

xmlhead = getxmlhead( xmlheadMap );//报文头

log.info("开始访问：" + url );//服务端url

log.info( "xmlhead:" + xmlhead );

log.info( "xmlbody:" + xmlbody );

xmlbody = new String(xmlbody.getBytes("UTF-8"),"ISO-8859-1");//报文体 转成iso-8859-1

HttpClient client = new HttpClient();

post = getPostMethod(url, xmlhead , xmlbody );

client.getParams().setParameter("http.protocol.version",HttpVersion.HTTP_1_1);

// client.getParams().setParameter("http.protocol.content-charset","UTF-8");

client.executeMethod( post );

respon = post.getResponseBodyAsString();

log.info("应答报文：" + respon );

log.info("访问结束：" + url );

}

catch(Exception e)

{

e.printStackTrace();

}

finally

        {

            // 释放连接

post.releaseConnection();

         }

return respon;

}

private static PostMethod getPostMethod(  String url, String xmlhead, String xmlbody ) throws Exception 

{

PostMethod post = new PostMethod(url);

List<Part> partList = new ArrayList<Part>();

partList.add(new StringPart("xmlhead", xmlhead, "UTF-8"));

partList.add(new StringPart("xmlbody", xmlbody, "UTF-8"));

//参考MultipartRequestEntity 类

MultipartRequestEntity multiEnt = new MultipartRequestEntity(

partList.toArray(new Part[partList.size()]),

post.getParams());

post.setRequestEntity(multiEnt);

return post;

}