Jackson JsonParseExceptionMapper和JsonMappingExceptionMapper阴影自定义映射器 [英] Jackson JsonParseExceptionMapper and JsonMappingExceptionMapper shadows custom mapper
问题描述
我的项目使用Spring Boot + Jersey 2.
我为JsonParseException创建了自定义Jackson映射器,但它没有被调用,而是使用标准的Jackson JsonParseExceptionMapper。 / p>
我的自定义映射器:
package com.rmn.gfc.common .providers;
import ...
@Provider
公共类JsonParseExceptionHandler实现ExceptionMapper< JsonParseException> {
@Override
public Response toResponse(JsonParseException exception){
return Response
.status(Response.Status.BAD_REQUEST)
// entity ...
.build();
}
}
我像这样注册我的映射器:
@Component
public class OrderServiceResourceConfig extends ResourceConfig {
public OrderServiceResourceConfig(){
packages(com。 rmn.gfc.common.providers);
}
}
我确信映射器注册正常,因为其他自定义来自这个包的mappers正在工作,但是一个用于JsonParseException的被Jersey标准的JsonParseExceptionMapper遮蔽。
我如何用我的实现覆盖标准的Jackson JsonParseExceptionMapper?
我发现解决方案对我来说很好。
使用 javax。自定义映射器上的annotation.Priority
,使其覆盖杰克逊默认映射器,例如:
@Provider
@Priority(1)
公共类JsonParseExceptionHandler实现ExceptionMapper< JsonParseException> {
// ...
}
或者,如果您注册JAX通过ResourceConfig -RS组件,您可以像这样指定优先级:
公共类MyResourceConfig扩展ResourceConfig {
public MyResourceConfig( ){
寄存器(JsonMappingExceptionHandler.class,1);
寄存器(JsonParseExceptionHandler.class,1);
// ... ...
}
}
较低编号为最高优先级。
javax.ws.rs.Priorities
有一些预定义的优先级常量。
My project uses Spring Boot + Jersey 2.
I created custom Jackson mapper for JsonParseException, but it didn't get called, standard Jackson JsonParseExceptionMapper used instead.
My custom mapper:
package com.rmn.gfc.common.providers;
import ...
@Provider
public class JsonParseExceptionHandler implements ExceptionMapper<JsonParseException> {
@Override
public Response toResponse(JsonParseException exception) {
return Response
.status(Response.Status.BAD_REQUEST)
// entity ...
.build();
}
}
I register my mapper like this:
@Component
public class OrderServiceResourceConfig extends ResourceConfig {
public OrderServiceResourceConfig() {
packages("com.rmn.gfc.common.providers");
}
}
I am sure that mapper registration is fine because other custom mappers from this package is working, but one for JsonParseException is shadowed by Jersey standard JsonParseExceptionMapper.
How could I override standard Jackson JsonParseExceptionMapper with my implementation?
I found solution that is fine for me.
Use javax.annotation.Priority
on your custom mapper to make it override Jackson default mapper, e.g.:
@Provider
@Priority(1)
public class JsonParseExceptionHandler implements ExceptionMapper<JsonParseException> {
// ...
}
OR , if you register JAX-RS components via ResourceConfig, you can specify priority like this:
public class MyResourceConfig extends ResourceConfig {
public MyResourceConfig() {
register(JsonMappingExceptionHandler.class, 1);
register(JsonParseExceptionHandler.class, 1);
// ...
}
}
The lower number the highest priority.
javax.ws.rs.Priorities
has some predefined constants for priorities.
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