k使用把手java和ratpac将JSON发送到模板

I am creating a test application that simply creates a JSON representation of an object and sends it to the template, I then want to use the JSON in a a JS script on the front end. I am using Ratpack and Java Handlebars to do this.

我正在创建一个测试应用程序，它只是创建一个对象的JSON表示并将其发送到模板，然后我想在前端的JS脚本中使用JSON。我正在使用Ratpack和Java Handlebars来做到这一点。

Here is my Ratpack handler

这是我的Ratpack处理程序

class HighChartHandler extends InjectionHandler {

    void handle(Context ctx, TestDataJson testDataJson) {
        testDataJson.goals = 1000
        testDataJson.name = "Nick"
        def jsonData = json(testDataJson)
        ctx.render(handlebarsTemplate('highchartTest.html', model: jsonData))
    }
}

And then I try to simply render the data on the page using

然后我尝试使用简单地在页面上呈现数据

<h1>Graph Test</h1>
<p>This is a WIP highchart test</p>
<p>{{model}}</p>

However I get this message :

但是我收到这条消息：

ratpack.jackson.internal.DefaultJsonRender@467db85c

I want to simply render something like

我想简单地渲染类似的东西

{"name":"Forlan","goals":1000}

2 个解决方案

#1

The method you're using, Jackson.json(Object) https://ratpack.io/manual/current/api/ratpack/jackson/Jackson.html#json-java.lang.Object- whose return type is of JsonRender https://ratpack.io/manual/current/api/ratpack/jackson/JsonRender.html

您正在使用的方法，Jackson.json（Object）https://ratpack.io/manual/current/api/ratpack/jackson/Jackson.html#json-java.lang.Object-其返回类型为JsonRender https ：//ratpack.io/manual/current/api/ratpack/jackson/JsonRender.html

So when you're running it through the template, it's simply calling "JsonRender#toString()which results in what you're seeing:ratpack.jackson.internal.DefaultJsonRender@467db85c`

因此，当您通过模板运行它时，它只是调用“JsonRender＃toString（）”，这会产生您所看到的内容：ratpack.jackson.internal.DefaultJsonRender @ 467db85c`

The Jackson.json method returns what is known in Ratpack as a Renderer. It tells Ratpack how to represent the Object that you've provided to the Renderer.

Jackson.json方法返回Ratpack中已知的Renderer。它告诉Ratpack如何表示您提供给渲染器的Object。

In order to produce json mixed with html, I would do something like this:

为了生成与html混合的json，我会做这样的事情：

def jsonData = new groovy.json.JsonOutput.toJson(testDataJson)
ctx.render(handlebarsTemplate('highchartTest.html', model: [model: jsonData]))

I haven't tested this but it should work.

我没有测试过这个，但它应该可行。

#2

-1

Try to use

尝试使用

<p>Name: {{name}}</p>
<p>Goals: {{goals}}</p>

instead of

代替

<p>{{model}}</p>

#1