java jsonString与Map之间转换

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public static void main(String[] args) {     Map<String, String> map = new HashMap<String, String>();     map.put("key1", "value1");     map.put("key2", "value2");     map.put("key3", "value3");     System.out.println("source: " + map.toString());           // map转换成jsonString     String jsonStr = JSON.toJSONString(map);     System.out.println("jsonStr: " + jsonStr);           // jsonString转换成Map     Map<String, String> jsonMap = JSON.parseObject(jsonStr, new TypeReference<HashMap<String, String>>() {     });     System.out.println("jsonMap: " + jsonMap.toString()); }

执行结果：

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source: {key1=value1, key2=value2, key3=value3} jsonStr: {"key1":"value1","key2":"value2","key3":"value3"} jsonMap: {key1=value1, key2=value2, key3=value3}