我是怎样学习Java

package firstcore.gsp.mvc.controller.site;

import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang.StringUtils;

import firstcore.com.utils.HttpUtils;
import firstcore.com.utils.string.JSON;
import firstcore.com.web.servlet.annotation.ActionValidate;
import firstcore.com.web.servlet.annotation.Ajax;
import firstcore.com.web.servlet.annotation.HttpPost;
import firstcore.com.web.servlet.http.RequestConvert;
import firstcore.com.web.servlet.mvc.view.Order;
import firstcore.gsp.app.IApp;
import firstcore.gsp.model.App;
import firstcore.gsp.model.User;
import firstcore.gsp.model.UserLogin;
import firstcore.gsp.service.impl.ServiceCenter;
import firstcore.gsp.utils.SiteConfig;
import firstcore.gsp.utils.UserValidate;
import firstcore.gsp.web.servlet.http.CurrentHttp;
import firstcore.gsp.web.servlet.mvc.Controller;
import firstcore.gsp.web.servlet.mvc.RegisterActionDealer;

public class signController extends Controller
{
    /**
     * 用户登录注册中心页面
     *
     * @param method
     * @param appCode
     * @return
     */
    @ActionValidate(isNeed = false, refererNotNeed = true, extDealer = RegisterActionDealer.class)
    public order indexAction(String method, String appCode)
    {
        this.viewData.put("method", method);
        this.viewData.put("appCode", appCode);
        return pageView("index");
    }

    /**
     * 用户提交注册
     *
     * @param entity
     * @return
     */
    @HttpPost
    @ActionValidate(isNeed = false, redirectNotNeed = "/u")
    public order registerAction(User entity)
    {
        List<String> infos = UserValidate.register(entity);

        String succeedUrl = "/sign/succeed/" + entity.getAppCode()
                + "?referer=" + HttpUtils.getCustomReferer("/u");
        return registerProcess(entity, infos, succeedUrl);
    }

    /**
     * 用户忘记密码
     *
     * @param user
     * @return
     */
    @Ajax
    @ActionValidate(isNeed = false)
    public order forgotAction(User entity)
    {
        JSON json = new JSON();
        boolean isSucceed = ServiceCenter.services.getSignService().forgot(
                entity);
        json.put("detail", entity.getAct());
        json.setSucceed(isSucceed);

        return jsonView(json);
    }
}