转换Map< String，String>到json

本文介绍了转换Map< String，String>到json的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 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 code.google/p/json-simple/wiki/EncodingExamples#Example_1-4_-_Encode_a_JSON_object_-_Using_Map_and_streaming :

Have a look at example 1.4 on this page code.google/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);