杰克逊ObjectMapper具有UTF-8编码? [英] Jackson ObjectMapper with UTF-8 encoding?

问题描述

在使用ObjectMapper序列化和反序列化对象时，有没有办法告诉Jackson使用UTF-8编码?

Is there a way to tell Jackson to use UTF-8 encoding when using ObjectMapper to serialize and deserialize Objects?

推荐答案

Jackson自动检测源中使用的编码:根据JSON规范，只有有效的编码为UTF-8，UTF-16和UTF-32.不能使用其他编码(如Latin-1). 因此，自动检测很容易，并且可以由解析器完成-出于这个原因，不接受任何编码检测. 因此，如果输入为UTF-8，则会被检测为此类.

Jackson automatically detects encoding used in source: as per JSON specification, only valid encodings are UTF-8, UTF-16 and UTF-32. No other encodings (like Latin-1) can be used. Because of this, auto-detection is easy and done by parser -- no encoding detection is accepted for this reason. So, if input is UTF-8, it will be detected as such.

对于输出，UTF-8是默认值；但是如果您明确希望使用其他编码，则可以显式创建JsonGenerator(使用采用JsonEncoding的方法)，并将其传递给ObjectMapper.

For output, UTF-8 is the default; but if you explicitly want to use another encoding, you can create JsonGenerator explicitly (with a method that takes JsonEncoding), and pass this to ObjectMapper.

或者，在两种情况下，您当然都可以手动构造java.io.Reader/java.io.Writer，并使其使用所需的任何编码.

Alternatively in both cases you can of course manually construct java.io.Reader / java.io.Writer, and make it use whatever encoding you want.

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