jackson

Need MixIn Resolution for non-static Inner Class using ObjectMapper - Java 6

由 喜欢而已 提交于 2021-02-11 06:43:59
问题 I'm facing an issue while using ObjectMapper for non-static inner class. I need to create MixIn to make it work but could not reach to the solution. Below is my class(which I can't change) and the MixIn, I tried. Help needed to create such MixIn. ============================ Base Class public class NestedClass implements Serializable{ private static final long serialVersionUID = -4509619645418618657L; private NestedInnerClass innerClass; public NestedClass() { innerClass = null; setInnerClass

Dynamic root element with Jackson

由 不羁岁月 提交于 2021-02-11 06:43:10
问题 I'm currently working on a project that deals with elements that (for legacy reasons) must have a tag name that represents their type. Basically I have this: @JsonRootName("node") class NodeDocument { private String type; } Which outputs something like: <node type="someType"></node> But what's expected would be: <someType></someType> @JsonRootName doesn't seem to be usable on a method or attribute. Even though there is SerializationConfig.withRooName() or custom serializers, I can't seem to

How to know what all properties are ignored by @JsonIgnoreProperties(ignoreUnknown=true)

由 孤街醉人 提交于 2021-02-11 02:00:21
问题 I need to serialize - deserialized an existing Java POJO in my code. The POJO is big + it has few parent classes in the hierarchy. The code is using spring and so Jackson internally. I started fixing one by one issue I found by fixing getter-setter name, including @JsonIgnore etc and after considerable time I fixed it completely. But I have to fix several such classes, so for the next class, I just added: @JsonIgnoreProperties(ignoreUnknown=true) which worked but during the testing I found it

How to know what all properties are ignored by @JsonIgnoreProperties(ignoreUnknown=true)

由 情到浓时终转凉″ 提交于 2021-02-11 01:58:19
问题 I need to serialize - deserialized an existing Java POJO in my code. The POJO is big + it has few parent classes in the hierarchy. The code is using spring and so Jackson internally. I started fixing one by one issue I found by fixing getter-setter name, including @JsonIgnore etc and after considerable time I fixed it completely. But I have to fix several such classes, so for the next class, I just added: @JsonIgnoreProperties(ignoreUnknown=true) which worked but during the testing I found it

Conditional JsonProperty using Jackson with Spring Boot

由 混江龙づ霸主 提交于 2021-02-10 23:36:54
问题 A Spring Boot application is tasked with updating a remote integration API every so many minutes. This application can be deployed to a test or prod environment, the application is informed of the end point it should be looking at through an "application.properties" flag. A POJO is being serialized with Jackson and pushed to the endpoint, with the JsonProperty annotations containing the field IDs for the API that it is being pushed to. ie @JsonProperty("field_001) private String name;

Conditional JsonProperty using Jackson with Spring Boot

由 杀马特。学长 韩版系。学妹 提交于 2021-02-10 23:35:59
问题 A Spring Boot application is tasked with updating a remote integration API every so many minutes. This application can be deployed to a test or prod environment, the application is informed of the end point it should be looking at through an "application.properties" flag. A POJO is being serialized with Jackson and pushed to the endpoint, with the JsonProperty annotations containing the field IDs for the API that it is being pushed to. ie @JsonProperty("field_001) private String name;

Conditional JsonProperty using Jackson with Spring Boot

由 亡梦爱人 提交于 2021-02-10 23:33:17
问题 A Spring Boot application is tasked with updating a remote integration API every so many minutes. This application can be deployed to a test or prod environment, the application is informed of the end point it should be looking at through an "application.properties" flag. A POJO is being serialized with Jackson and pushed to the endpoint, with the JsonProperty annotations containing the field IDs for the API that it is being pushed to. ie @JsonProperty("field_001) private String name;

JAR冲突问题的解决

由 心已入冬 提交于 2021-02-10 19:48:57
今天碰到群里小伙伴问，线上程序好像有多个不同版本的Netty包，怎么去看到底加载了哪一个? 在说如何看之前，先来说说，当你开始意识到项目里有多个不同版本的Jar包，都是因为遇到了这几个异常： 1、java.lang.NoSuchMethodException：自己代码中调用了某个方法，因为加载了其他版本的jar，这个版本正好没这个方法。 2、java.lang.NoClassDefFoundError：编译时候是好的，但是运行的时候，因为加载的jar版本问题，没有这个类。 3、java.lang.ClassNotFoundException：在动态加载某个Class的时候，因为要加载的jar不是正确的版本，而导致找不到这个类。 当你在本地运行ok，但到服务器上发现出现这些错误的时候，就要意识到很可能是jar冲突了(有相同依赖存在多个版本)。这个问题往往也会有这样的表现：多实例部署的时候，有的实例是好的，有的实例则不行。 查看加载的类和方法 根据之前分析的异常种类，我们可以去运行中的现场确认当前加载的问题。 这里我们可以使用阿里开源的Arthas工具，如果第一次用，那么按下面操作先安装再运行： curl -O https://arthas.aliyun.com/arthas-boot.jar java -jar arthas-boot.jar 运行好之后

Jackson custom KeyDeserializer for Map, excluding entries where key is null

由 ♀尐吖头ヾ 提交于 2021-02-10 18:34:00
问题 The custom key deserializer in my POJO as follows: @JsonDeserialize(keyUsing = MyCustomKeyDeserializer.class) @JsonInclude private Map<T, @Range(min = 0, max = 100) Integer> ratios; However, I have a situation where a key that was previously valid, is no longer valid and would like to offer backward compatibility. For example, if the code used to accept the keys AGE and HEIGHT and would like to start excluding HEIGHT , the JSON object {"AGE": 30, "HEIGHT": 60} would be deserialized to just {

How to serialize JSON with array field to object with String field?

由 北城以北 提交于 2021-02-10 14:16:42
问题 I have a JSON object like { "id" : "1", "children" : ["2","3"] } And I have a Java object like (constructor, getters and setters are omitted): public class Entity { public String id; public String children; } I want this JSON to be deserialized to my Java object by this code using Jackson: Entity entity = mapper.readValue(json, Entity.class); But get the following error: Can not deserialize instance of java.lang.String out of START_ARRAY token How can I solve it without changing type of
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