java map类型转换成string类型

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Map<String, String> map = new HashMap<String, String>(); map.put("key1", "value1"); map.put("key2", "value2"); map.put("key3", "value3"); System.out.println(map.toString());

执行结果：

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1	{key1=value1, key2=value2, key3=value3}