如何使用Java脚本window.location将参数传递给Play框架中的Java方法? [英] How to pass arguments using java script window.location to a java method in play framework?

问题描述

我想使用javascript中的window.location在Java文件中调用带有参数的方法.我尝试了不同的方法，但无法调用该函数.当我尝试打印所传递的值时，它会记录在控制台中，但是当我尝试在方法中调用它时，它会抛出未找到值"错误.我应该对代码进行什么更改以调用该方法?.

I want to call a method with parameter in my java file using window.location in javascript. I've tried different approaches but not able to call the function. When I tried to print the value that I've passed it is getting logged in the console but when I tried to call it in the method it is throwing value not found error. What changes I should make to my code to call the method?.

我为不带参数的getUsers进行的调用工作正常.

And the call that I've made for getUsers with no arguments is working fine.

对于使用参数进行调用，我尝试将其作为一个单独的字符串，并尝试连接并分配给window.location，即使它没有用.我想在控制器中成功调用该方法.

And for calling with arguments I tried to take it as a separate string and tried to concat and then assign to window.location even then it hasn't worked. I want to successfully call the method in my controller.

尝试使用单引号@和$.

Tried with single quotes, @ and $.

<script>
        function displayPopUp(stri) {

                window.location = "@routes.UserController.deleteUser(stri)";


        }
window.location = "@routes.UserController.getUsers()";
    </script>

推荐答案

简而言之-这是不可能的.

In a short - it is not possible.

@routes.UserController.deleteUser(stri)是在服务器上编译的，而function displayPopUp(stri)是在客户端上运行的，因此下一个代码将无法按预期"工作:

The @routes.UserController.deleteUser(stri) is compiled on the server, and function displayPopUp(stri) is run on the client, so the next code will not work "as expected":

<script>
  function displayPopUp(stri) {
    window.location = "@routes.UserController.deleteUser(stri)";
  }
</script>

解决方案

JavaScript反向路由:

Javascript reverse routing:

https://www.playframework.com/documentation/2.6.x/JavaJavascriptRouter https://www.playframework.com/documentation/2.6.x/ScalaJavascriptRouting

快速示例:

在控制器中创建javascriptRoutes 操作:

create a javascriptRoutes action in a controller :

如果您使用 Java :

public Result javascriptRoutes() {
  return ok(JavaScriptReverseRouter.create(
          "jsRoutes", routes.javascript.UserController.deleteUser()))
      .as("text/javascript");
}

如果您使用 Scala :

def javascriptRoutes = Action { implicit request =>
  Ok(
    JavaScriptReverseRouter("jsRoutes")(
      routes.javascript.UserController.deleteUser
    )
  ).as("text/javascript")
}

添加相应的路线:

GET     /javascriptRoutes      controllers.Application.javascriptRoutes

加载 javascript 路由器:

<script type="text/javascript" src="@routes.Application.javascriptRoutes"></script>

现在，您可以在客户端 javascript

Now you can use them in the client javascript

<script>
  function displayPopUp(stri) {
    window.location = jsRoutes.controllers.UserController.deleteUser(stri).url;
  }
</script>

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