如何从 REST 端点捕获 JsonParseException
How to catch JsonParseException from REST endpoint
我有一个这样的端点:
@POST
public Response update(MyDocument myDocument){}
如果请求无效,我的服务器会得到一些很长的日志,如下所示:
javax.servlet.ServletException: org.glassfish.jersey.server.ContainerException: com.fasterxml.jackson.core.JsonParseException: Unexpected character....
...
Caused by...
...
Caused by...
这个异常是很难完全避免的,所以我想知道如何捕获JsonParseException?
实施 ExceptionMapper
for JsonParseException
。它将允许您将给定的异常映射到响应。请参阅以下示例:
@Provider
public class JsonParseExceptionMapper implements ExceptionMapper<JsonParseException> {
@Override
public Response toResponse(JsonParseException exception) {
return Response.status(Response.Status.BAD_REQUEST)
.entity("Cannot parse JSON")
.type(MediaType.TEXT_PLAIN)
.build();
}
}
然后在你的ResourceConfig
子类中用绑定优先级注册它(见注释):
@ApplicationPath("api")
public class JerseyConfig extends ResourceConfig {
public JerseyConfig() {
register(JsonParseExceptionMapper.class, 1);
}
}
如果您没有使用 ResourceConfig
子类,您可以将 ExceptionMapper
注释为 @Priority
(见注释):
@Provider
@Priority(1)
public class JsonParseExceptionMapper implements ExceptionMapper<JsonParseException> {
...
}
注 1: 您可能还会发现创建另一个 ExceptionMapper
for JsonMappingException
.
很有帮助
注2:优先考虑自己的ExceptionMapper
s is particularly useful if you have the JacksonFeature
registered and you want to override the behavior of JsonParseExceptionMapper
and JsonMappingExceptionMapper
that come with the jackson-jaxrs-json-provider
module. See this 了解更多详情。
我有一个这样的端点:
@POST
public Response update(MyDocument myDocument){}
如果请求无效,我的服务器会得到一些很长的日志,如下所示:
javax.servlet.ServletException: org.glassfish.jersey.server.ContainerException: com.fasterxml.jackson.core.JsonParseException: Unexpected character....
...
Caused by...
...
Caused by...
这个异常是很难完全避免的,所以我想知道如何捕获JsonParseException?
实施 ExceptionMapper
for JsonParseException
。它将允许您将给定的异常映射到响应。请参阅以下示例:
@Provider
public class JsonParseExceptionMapper implements ExceptionMapper<JsonParseException> {
@Override
public Response toResponse(JsonParseException exception) {
return Response.status(Response.Status.BAD_REQUEST)
.entity("Cannot parse JSON")
.type(MediaType.TEXT_PLAIN)
.build();
}
}
然后在你的ResourceConfig
子类中用绑定优先级注册它(见注释):
@ApplicationPath("api")
public class JerseyConfig extends ResourceConfig {
public JerseyConfig() {
register(JsonParseExceptionMapper.class, 1);
}
}
如果您没有使用 ResourceConfig
子类,您可以将 ExceptionMapper
注释为 @Priority
(见注释):
@Provider
@Priority(1)
public class JsonParseExceptionMapper implements ExceptionMapper<JsonParseException> {
...
}
注 1: 您可能还会发现创建另一个 ExceptionMapper
for JsonMappingException
.
注2:优先考虑自己的ExceptionMapper
s is particularly useful if you have the JacksonFeature
registered and you want to override the behavior of JsonParseExceptionMapper
and JsonMappingExceptionMapper
that come with the jackson-jaxrs-json-provider
module. See this