我有一个如下的哈希图
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 Freemarker 模板是：
<html><body>
<#list hello?keys as key>
${key} = ${hello[key]}
</#list>
</body></html>
目标是在我生成的 HTML 中显示键值对。请帮我做。谢谢！
代码：
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>
从 2.3.25 开始，您可以这样做：
<body>
<#list hello as key, value>
${key} = ${value}
</#list>
</body>
使用保留键值对插入顺序的映射：LinkedHashMap
2.3.25之前，如果key包含对象，可以尝试使用
<#assign key_list = map?keys/>
<#assign value_list = map?values/>
<#list key_list as key>
...
<#assign seq_index = key_list?seq_index_of(key) />
<#assign key_value = value_list[seq_index]/>
...
//Use the ${key_value}
...
</#list>