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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 启动 + Thymeleaf 在这里。 我有以下我一直在测试的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>
这将在浏览器中打开并且效果很好,饼图和所有。
但现在我想让饼图动态化,并且我希望服务器设置饼图中所有切片的值。 所以在服务器端(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%
我试图弄清楚如何使用 Thymeleaf 标签修改 HTML 文件(模板),以便我可以使用这个foodMap
来动态地驱动饼图的切片。 我想我需要类似的东西:
<!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: ${key}" />}
</th>
]
}]
});
foodChart.render();
}
</script>
</head>
<body>
<div id="foodChart" style="height: 300px; width: 100%;"></div>
<script src="https://canvasjs.com/assets/script/canvasjs.min.js"></script>
</body>
</html>
但这不起作用,任何人都可以将我推向正确的方向吗?
为此,您应该利用 Thymeleaf 的JavaScript 内联。 例如,如果您这样做:
<script th:inline="javascript">
let foodMap = /*[[${foodMap}]]*/ {};
</script>
它将 output:
<script>
let foodMap = {"Pizza":35.0,"French Fries":65.0};
</script>
一旦你有了这些数据,就很容易将它转换成你想要的格式。 把它们放在一起:
<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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