### Question:
TraceController { @RequestMapping("/trace/traceList") @ResponseBody public ListResult traceList(HttpServletRequest request, String callback) { ListResult result = new ListResult(); List<Map<String, Object>> traceLists = service.getTraceList(request); result.setResult(traceLists); result.setCallback(callback); return result; }  @RequestMapping("/trace/queryCondition") @ResponseBody ListResult traceQueryCondition(String callback); @RequestMapping("/trace/traceList") @ResponseBody ListResult traceList(HttpServletRequest request, String callback); @RequestMapping("/trace/traceSpan") @ResponseBody MapResult traceSpan(HttpServletRequest request, String callback);  }### Answer:
@Test public void testTraceList() throws ClientProtocolException, IOException { String url = "http: String result = HttpClientUtil.request(url); System.out.println(result); }