Spring反序列化失败 Type definition error: [simple type, class xxx.xxx.xxx]

也许更好的阅读体验

Type definition error: [simple type, class com.elm.po.CommonResult]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of com.elm.po.CommonResult (no Creators, like default constructor, exist): cannot deserialize from Object value (no delegate- or property-based Creator)

网上搜索得知是反序列化失败了，看到这俩解决办法

• 需要转换的entity没有getter/setter(本次受此影响，这个不能漏，如果懒得写可以考虑lombok)
• 没有实现Serializable(本次并不直接对其序列化传输，不涉及)

代码如下

@Data
@AllArgsConstructor
public class CommonResult implements Serializable {
    private Integer code;
    private String message;
    private Object result;
    public static CommonResult success (Object object) {
        return new CommonResult(200, "success", object);
    }
}
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可知，实现了Serializable，并且也用了lombok的@Data注解，以上两种方法不能解决问题
问题所在：没有无参构造方法
解决方法：加上@NoArgsConstructor
解决代码：

@Data
@NoArgsConstructor
@AllArgsConstructor
public class CommonResult implements Serializable {
    private Integer code;
    private String message;
    private Object result;
    public static CommonResult success (Object object) {
        return new CommonResult(200, "success", object);
    }
}

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