从后端获取三级页面URL

src/main/java/edu/nju/controller/ExtraController.java

@@ -494,8 +494,19 @@ public class ExtraController {
 
 	@RequestMapping(value = "/pageUrl")
 	@ResponseBody
-	public String getPageUrl(String caseId){
-		return extraService.getPageUrl(caseId);
+	public void getPageUrl(String caseId,HttpServletResponse response){
+		try {
+			PrintWriter out = response.getWriter();
+			JSONObject result = new JSONObject();
+			result.put("status", 200);
+			result.put("result",extraService.getPageUrl(caseId));
+			out.print(result);
+			out.flush();
+			out.close();
+		} catch (IOException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
 	}
 
 }