转换Map< String，String>到json [英] Converting Map<String,String> into json

问题描述

我在Java中有这样的Map<String,String>:

I have Map<String,String> in java like this :

{card_switch=Master, issuing_bank=ICCI, card_Type=DebitCard}

我正在使用简单json解析器将此地图解析为json对象.

I'm using the simple json parser to parse this map into json object.

我尝试过:

Object json = JSONValue.parse(entry.getKey());

但是我收到一条错误消息:

But I get an error message :

Object json = JSONValue.parse(entry.getKey());
                      ^
method JSONValue.parse(String) is not applicable
  (actual argument Map<String,String> cannot be converted to String by method invocation conversion)
method JSONValue.parse(Reader) is not applicable
  (actual argument Map<String,String> cannot be converted to Reader by method invocation conversion)

是否可以将Map<String,String>转换为json?

Is that possible to convert Map<String,String> into json?

推荐答案

在此页面上查看示例1.4

Have a look at example 1.4 on this page http://code.google.com/p/json-simple/wiki/EncodingExamples#Example_1-4_-_Encode_a_JSON_object_-_Using_Map_and_streaming:

 Map obj=new LinkedHashMap();
   obj.put("name","foo");
   obj.put("num",new Integer(100));
   obj.put("balance",new Double(1000.21));
   obj.put("is_vip",new Boolean(true));
   obj.put("nickname",null);
   StringWriter out = new StringWriter();
   JSONValue.writeJSONString(obj, out);
   String jsonText = out.toString();
   System.out.print(jsonText);

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