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Freemarker and hashmap. How do I get key-value

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Happy的楠姐
Happy的楠姐 2020-12-09 02:55

I have a hash map as below

HashMap map = new HashMap();
map.put(\"one\", \"1\");
map.put(\"two\", \"2\");
map.put
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4条回答
  • 深忆病人
    2020-12-09 03:36

    Before 2.3.25, in case of keys containing objects, you can try to use 

    <#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>
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  • 时光取名叫无心
    2020-12-09 03:40

    Code:

    HashMap<String, String> test1 = new HashMap<String, String>();
Map root = new HashMap();
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

    Template:

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

    Output:

    <body>
    two = 2 
    one = 1 
    three = 3 
</body>
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  • 时光取名叫无心
    2020-12-09 03:50

    Use a map that preserves the insertion order of the key-value pairs: LinkedHashMap

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  • 执笔经年
    2020-12-09 03:52

    Since 2.3.25, you can do this:

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