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Java Mistake 100_10.html
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Java Mistake 100 - Pumpkinor.io
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<h1>序列化</h1>
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<p>序列化和反序列化时需要避开的几个坑：</p>
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<li>Jackson 有大量的序列化和反序列化特性，可以用来微调序列化和反序列化的细节。需要注意的是，如果自定义 ObjectMapper 的 Bean，小心不要和 Spring Boot 自动配置的 Bean 冲突。</li>
<li>在调试序列化反序列化问题时，我们一定要捋清楚三点：是哪个组件在做序列化反序列化、整个过程有几次序列化反序列化，以及目前到底是序列化还是反序列化。</li>
<li>对于反序列化默认情况下，框架调用的是无参构造方法，如果要调用自定义的有参构造方法，那么需要告知框架如何调用。更合理的方式是，对于需要序列化的 POJO 考虑尽量不要自定义构造方法。</li>
<li>枚举不建议定义在 DTO 中跨服务传输，因为会有版本问题，并且涉及序列化反序列化时会很复杂，容易出错。因此，我只建议在程序内部使用枚举。</li>
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<p>最后还有一点需要注意，如果需要跨平台使用序列化的数据，那么除了两端使用的算法要一致外，还可能会遇到不同语言对数据类型的兼容问题。这，也是经常踩坑的一个地方。如果你有相关需求，可以多做实验、多测试。</p>
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<span class="date">2021/10/25</span>
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