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[英]Spring boot Rest thymeleaf javascript is not returning HTML
[英]Spring Boot and Thymeleaf: iterating map entries in JavaScript
Spring 啟動 + Thymeleaf 在這里。 我有以下我一直在測試的static HTML 文件:
<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<script>
window.onload = function() {
var foodChart = new CanvasJS.Chart("foodChart", {
animationEnabled: true,
title: {
text: "Foods"
},
data: [{
type: "pie",
startAngle: 240,
yValueFormatString: "##0.00\"%\"",
indexLabel: "{label} {y}",
dataPoints: [
{y: 95.0, label: "Pizza"},
{y: 5.0, label: "French Fries"}
]
}]
});
foodChart.render();
}
</script>
</head>
<body>
<div id="foodChart" style="height: 300px; width: 100%;"></div>
<script src="https://canvasjs.com/assets/script/canvasjs.min.js"></script>
</body>
</html>
這將在瀏覽器中打開並且效果很好,餅圖和所有。
但現在我想讓餅圖動態化,並且我希望服務器設置餅圖中所有切片的值。 所以在服務器端(Java/Spring Boot),我有:
Map<String,BigDecimal> foodMap = new HashMap<>();
foodMap.put("Pizza", BigDecimal.valueOf(35.0)); // 35%
foodMap.put("French Fries", BigDecimal.valueOf(65.0)); // 65%
我試圖弄清楚如何使用 Thymeleaf 標簽修改 HTML 文件(模板),以便我可以使用這個foodMap
來動態地驅動餅圖的切片。 我想我需要類似的東西:
<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<script>
window.onload = function() {
var foodChart = new CanvasJS.Chart("foodChart", {
animationEnabled: true,
title: {
text: "Foods"
},
data: [{
type: "pie",
startAngle: 240,
yValueFormatString: "##0.00\"%\"",
indexLabel: "{label} {y}",
dataPoints: [
<th:each="key: ${foodMap}">
{<th:text="y: ${value}, label: ${key}" />}
</th>
]
}]
});
foodChart.render();
}
</script>
</head>
<body>
<div id="foodChart" style="height: 300px; width: 100%;"></div>
<script src="https://canvasjs.com/assets/script/canvasjs.min.js"></script>
</body>
</html>
但這不起作用,任何人都可以將我推向正確的方向嗎?
為此,您應該利用 Thymeleaf 的JavaScript 內聯。 例如,如果您這樣做:
<script th:inline="javascript">
let foodMap = /*[[${foodMap}]]*/ {};
</script>
它將 output:
<script>
let foodMap = {"Pizza":35.0,"French Fries":65.0};
</script>
一旦你有了這些數據,就很容易將它轉換成你想要的格式。 把它們放在一起:
<script th:inline="javascript">
window.onload = function() {
let foodMap = /*[[${foodMap}]]*/ {};
let dataPoints = [];
for (food in foodMap) {
dataPoints.push({
'label': food,
'y': foodMap[food]
});
};
var foodChart = new CanvasJS.Chart("foodChart", {
animationEnabled: true,
title: {text: "Foods"},
data: [{
type: "pie",
startAngle: 240,
yValueFormatString: "##0.00\"%\"",
indexLabel: "{label} {y}",
dataPoints: dataPoints
}]
});
foodChart.render();
}
</script>
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