自由标记和哈希映射。如何获取键值

html java freemarker

2022-09-01 18:01:48

我有一个哈希图，如下所示

HashMap<String, String> map = new HashMap<String, String>();
map.put("one", "1");
map.put("two", "2");
map.put("three", "3");

Map root = new HashMap();
root.put("hello", map);

我的免费标记模板是：

<html><body>
    <#list hello?keys as key> 
        ${key} = ${hello[key]} 
    </#list> 
</body></html>

目标是在我正在生成的 HTML 中显示键值对。请帮我做。谢谢！

答案 1

法典：

Map root = new HashMap();
HashMap<String, String> test1 = new HashMap<String, String>();
test1.put("one", "1");
test1.put("two", "2");
test1.put("three", "3");
root.put("hello", test1);


Configuration cfg = new Configuration(); // Create configuration
Template template = cfg.getTemplate("test.ftl"); // Filename of your template

StringWriter sw = new StringWriter(); // So you can use the output as String
template.process(root, sw); // process the template to output

System.out.println(sw); // eg. output your result

模板：

<body>
<#list hello?keys as key> 
    ${key} = ${hello[key]} 
</#list> 
</body>

输出：

<body>
    two = 2 
    one = 1 
    three = 3 
</body>

答案 2

从 2.3.25 开始，您可以执行以下操作：

<body>
<#list hello as key, value> 
    ${key} = ${value} 
</#list> 
</body>