一個工程中的主要方法：

public Map ky(Map map){
		String url = "http://localhost:8080/api/json/ky.action";
		Map reMap = new HashMap();
		try{
			if(map.size() == 0){
				reMap.put("outResult", "0");  
				reMap.put("outResultReason", "無資料需要傳送");  
				return reMap;
			}
			
			map.put("typeId", "06");
			ArrayList list = (ArrayList)dao.queryMapList("billVerify.getLinkUrl",map);
			/*
			if(list == null || list.size() == 0){
				reMap.put("outResult", "1");  
				reMap.put("outResultReason", "不呼叫物流驗證介面");  
				return reMap;
			}else{
				HashMap linkMap = (HashMap)list.get(0);
				url = linkMap.get("linkUrl").toString();
			}
			*/
			
			HttpClient client = new HttpClient();  
			//返回結果集  
			JSONObject resJson = new JSONObject();  
	  
			PostMethod postMethod = new PostMethod(url);
			
		    StringPart strPart1 = new StringPart("param", URLEncoder.encode(JSONObject.fromObject(map).toString(), "utf-8"));
		    client.getParams().setSoTimeout(15000);
		    Part[] parts = { strPart1};
			//對於MIME型別的請求，httpclient建議全用MulitPartRequestEntity進行包裝  
			MultipartRequestEntity mre = new MultipartRequestEntity(parts, postMethod.getParams());  
			postMethod.setRequestEntity(mre);  
			//執行請求，返回狀態碼
			int status = client.executeMethod(postMethod);  
			if (status == HttpStatus.SC_OK) {  
				String result = postMethod.getResponseBodyAsString(); 
				resJson = JSONObject.fromObject(result);
				if("1".equals(resJson.get("outResult"))){
					reMap.put("outResult", resJson.get("outResult"));  
					reMap.put("outResultReason", resJson.get("outResultReason"));  
				}else{
					reMap.put("outResult", resJson.get("outResult"));  
					reMap.put("outResultReason", resJson.get("outResultReason"));  
				}
				
			} else {  
				System.out.println("介面請求失敗。");  
				reMap.put("outResult", "0");  
				reMap.put("outResultReason", "請求失敗。");  
			}  
		}catch(Exception e){
			e.printStackTrace();
			reMap.put("outResult", "0");  
			reMap.put("outResultReason", "請求超時。");  
		}
		
		return reMap;
	}
 

public String ky(){
		Map map = new HashMap();
		try {
			jsonParam = URLDecoder.decode(param ,"UTF-8");
		} catch (Exception e1) {
			e1.printStackTrace();
		}
		if(jsonParam==null){
			map.put("outResult", "0");
			map.put("outResultReason", "引數：param 為空！");
			result = JSONObject.fromObject(map);
			return SUCCESS;
		}
		map = jsonService.ky(jsonParam);
		result = JSONObject.fromObject(map);
		return SUCCESS;
	}