废话不多说，PathVariable的原理无外乎就是正则表达式了。直接上代码吧。 首先要修改 com.jfinal.core.ActionMapping ， 写入一个私有属性 actionKeyList ，用来记录每个ActionKey

private final List
    
             actionKeyList = new ArrayList
     
      ();
     
    

在 buildActionMapping 方法内加上以下代码

void buildActionMapping() {        // 省略原有代码        actionKeyList.clear();        actionKeyList.addAll(mapping.keySet());        Collections.sort(actionKeyList, new Comparator
    
     () {            @Override            public int compare(String o1, String o2) {                return o2.compareTo(o1);            }        });        actionKeyList.remove("/");        actionKeyList.remove("");    }
    

然后就是修改 getAction 方法啦

Action getAction(String url, String[] urlPara) {        Action action = mapping.get(url);        if (action != null) {            return action;        }        int i = url.lastIndexOf(SLASH);        if (i != -1) {            action = mapping.get(url.substring(0, i));            urlPara[0] = url.substring(i + 1);        }        if (action == null) {            urlPara[0] = null;            if (urlPara.length > 1) urlPara[1] = null;            for (String actionKey : actionKeyList) {                AntPathMatcher matcher = new AntPathMatcher();                if (matcher.match(actionKey, url)) {                    action = mapping.get(actionKey);                    Map
    
      result = matcher.extractUriTemplateVariables(actionKey, url);                    for (String path : new ArrayList
     
      (result.keySet())) {                        actionKey = actionKey.replace("{" + path + "}", result.get(path));                    }                    if (actionKey.endsWith("/**")) actionKey = actionKey.substring(0, actionKey.length() - 4);                    if (url.length() > actionKey.length()) {                        urlPara[0] = url.substring(actionKey.length() + 1);                    }                    if (urlPara.length > 1) urlPara[1] = JSON.toJSONString(result);                    break;                }            }        }        return action;    }
     
    

代码中主要使用了 SpringFramework 中的 AntPathMatcher，这个在SpringFramework的core包中，添加相关jar即可，或者自己剥离出来这块代码。 上面的代码里面我们扩充了urlPara的个数，相对的我们要在ActionHandler中也扩充一下urlPara的个数，并对Controller进行想对应的改造

String[] urlPara = { null, null };Action action = actionMapping.getAction(target, urlPara);// 省略代码...Controller controller = action.getControllerClass().newInstance();controller.init(request, response, urlPara[0], urlPara[1]);

用法如下

@Clear@ControllerBind(controllerKey = "testt/{uuid}")public class TestController extends Controller {    public void add() {        System.out.println(getPathVAriable("uuid"));        renderError(404);    }}