Playframework路由

Question

好的，我正在学习play框架，我理解路由概念，但是Play for Java Book告诉我创建一个产品控制器类，如下所示

package controllers;

import com.google.inject.Inject;
import play.mvc.Controller;
import play.mvc.Result;

public class Products extends Controller {

    public static Result list() {
        return TODO;
    }

    public static Result showBlank(){
        return TODO;
    }

    public static Result show(Long ean) {
        return TODO;
    }

    public static Result save(){
        return TODO;
    }
}

然后它告诉我创建这些路线

# Routes
# This file defines all application routes (Higher priority routes first)
# ~~~~

# Home page
GET     /                           controllers.Application.index()

GET /products/ controllers.Products.list()
GET /products/new controllers.Products.showBlank()
GET /products/:ean controllers.Products.show(ean: Long)
POST /products/ controllers.Products.save()





# Map static resources from the /public folder to the /assets URL path
GET     /assets/*file               controllers.Assets.versioned(path="/public", file: Asset)

经过复习，以确保书中的一切都是正确的，它给了我这个错误。

value list is not a member of controllers.Products
In C:\Users\Rijos\PlayJavaBook\conf\routes:8
5# Home page
6GET     /                           controllers.Application.index()
7
8GET /products/ controllers.Products.list()
9GET /products/new controllers.Products.showBlank()
10GET /products/:ean controllers.Products.show(ean: Long)
11POST /products/ controllers.Products.save()
12

我知道，这是一种遗留的方法，因为现在是依赖注入，所以这就是play框架，但是即使在阅读了play框架文档之后，我也不知道如何使用它。这是我的build.sbt文件

name := """play-java"""

version := "1.0-SNAPSHOT"

lazy val root = (project in file(".")).enablePlugins(PlayJava)

scalaVersion := "2.11.6"

libraryDependencies ++= Seq(
  javaJdbc,
  cache,
  javaWs
)

// Play provides two styles of routers, one expects its actions to be injected, the
// other, legacy style, accesses its actions statically.
routesGenerator := InjectedRoutesGenerator


fork in run := true

Answer 1

尝试在控制器上添加@Singlton，并从方法中删除静态声明。