Java @JsonIgnoreProperties 对已知和未知属性的使用
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@JsonIgnoreProperties usage for both known and unknown properties
提问by user1242321
My current annotation for ignoring the known properties for a JPA entity is:
我当前忽略 JPA 实体的已知属性的注释是：
@JsonIgnoreProperties({"hibernateLazyInitializer", "handler","created","updated","createdBy","lastUpdatedBy"})
In addition to ignoring these class properties, I would also like to ignore any unknown properties that the server receives. I know the alone way to ignore the unknown properties by the following annotation:
除了忽略这些类属性之外，我还想忽略服务器接收到的任何未知属性。我知道通过以下注释忽略未知属性的唯一方法：
@JsonIgnoreProperties(ignoreUnknown=true)
But not sure how to add this to my current annotation given above. I tried multiple methods ?s below but none seem to work and I could not find an example online for this scenario.
但不确定如何将其添加到我上面给出的当前注释中。我在下面尝试了多种方法？ s 但似乎都没有工作，我无法在网上找到这种情况的示例。
Any example or leads on documentation would also help.
任何关于文档的示例或线索也会有所帮助。
采纳答案by cassiomolin
Set ignoreUnknownto trueand define the names of properties to ignore in the valueelement:
设置ignoreUnknown于true和定义属性中忽略的名字value元素：
@JsonIgnoreProperties(ignoreUnknown = true,
value = {"hibernateLazyInitializer", "handler", "created"})
How does it work?
它是如何工作的？
Have a look at this quote from the documentation(highlight is mine):
看看文档中的这句话（重点是我的）：
In its simplest form, an annotation looks like the following:
@EntityThe at sign character (
@) indicates to the compiler that what follows is an annotation. In the following example, the annotation's name isOverride:@Override void mySuperMethod() { ... }The annotation can include elements, which can be named or unnamed, and there are values for those elements:
@Author(name = "Benjamin Franklin", date = "3/27/2003") class MyClass() { ... }or
@SuppressWarnings(value = "unchecked") void myMethod() { ... }If there is just one element named
value, then the name can be omitted, as in:@SuppressWarnings("unchecked") void myMethod() { ... }
以最简单的形式，注释如下所示：
@Entityat 符号字符 (
@) 向编译器指示后面的内容是注释。在以下示例中，注释的名称是Override：@Override void mySuperMethod() { ... }注释可以包含元素，可以命名或未命名，并且这些元素有值：
@Author(name = "Benjamin Franklin", date = "3/27/2003") class MyClass() { ... }或者
@SuppressWarnings(value = "unchecked") void myMethod() { ... }如果只有一个名为 的元素
value，则可以省略名称，如下所示：@SuppressWarnings("unchecked") void myMethod() { ... }
Other way to handle unknown properties
处理未知属性的其他方法
To ignore unknown properties, you also could do:
要忽略未知属性，您还可以执行以下操作：
ObjectMapper mapper = new ObjectMapper();
mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
