jackson | 易学教程

Custom serialized and deserialized field names with lombok

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问题 Is there a way to specify different serialized/deserialized JSON field names without having to write out both getter and setter methods explicitly, perhaps using lombok getters and setters? As similar to this example, the following code permits incoming JSON to be deserialized to a different POJO field name. It also causes the POJO field name to be serialized as is: public class PrivacySettings { private String chiefDataOfficerName; @JsonProperty("CDO_Name__c") private void

Deserializing stringified (quote enclosed) nested objects with Jackson

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问题 I am consuming a "RESTful" service (via RestTemplate) that produces JSON as follows: { "id": "abcd1234", "name": "test", "connections": { "default": "http://foo.com/api/", "dev": "http://dev.foo.com/api/v2" }, "settings": { "foo": "{\n \"fooId\": 1, \"token\": \"abc\"}", "bar": "{\"barId\": 2, \"accountId\": \"d7cj3\"}" } } Note the settings.foo and settings.bar values, which cause issues on deserialization. I would like to be able to deserialize into objects (e.g., settings.getFoo().getFooId

Deserializing stringified (quote enclosed) nested objects with Jackson

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Using Jongo and Jackson 2, how to deserialize a MongoDB ObjectId (represented under String _id in a POJO) to an hexadecimal String representation?

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问题 I use the latest version of MongoDB database and the latest version of the official JAVA MongoDB driver. The dependencies that I use in my pom.xml: <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.7</maven.compiler.source> <maven.compiler.target>1.7</maven.compiler.target> ... <jersey.container.version>2.13</jersey.container.version> <jackson.version>2.4.3</jackson.version> <genson.version>1.1</genson.version> <jongo.version>1.1</jongo

Using Jongo and Jackson 2, how to deserialize a MongoDB ObjectId (represented under String _id in a POJO) to an hexadecimal String representation?

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Jackson JSON converts integers into strings

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问题 I am using the object mapper to map into an object that has String variables. This works a little too well, because even integers and booleans from the JSON are converted into Strings. Example: {"my_variable":123} class MyClass{ String my_variable; } I would like the object mapper to report an error in this kind of situation instead of converting 123 into a string for my_variable. Is this possible? 回答1: There is currently no such configuration, but you can override default deserializer with a

Caused by: java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/JsonMappingException$Reference

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问题 I am completely new to Java. I am trying to display JSON data, for that I have decided to go for Jackson library. But I am getting the Error. I am using jackson-annotations-2.3.0.jar jackson-core-2.4.2.jar jackson-databind-2.4.2.jar This is my Object and in this I have one dependency "tnStudentLocLog" public class Student implements java.io.Serializable, WorkItem { private int studentId; private Date date; private Date startTime; private Date endtime; private int room; private Set

Caused by: java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/JsonMappingException$Reference

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Apache Druid 远程代码执行漏洞分析(CVE-2021-25646)

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作者：Skay@QAX A-TEAM 原文链接： https://mp.weixin.qq.com/s/m7WLwJX-566WQ29Tuv7dtg 一、调试环境 https://archive.apache.org/dist/druid/0.20.1/ 这里尝试了几种常规的调试方法都不行，然后看到conf目录下存在jvm.config,一搜好多，因为我们的启动脚本为start-micro-quickstart,所以最后范围锁定在这几个一开始踩了一个坑，D:\java\druid\druid run\apache-druid-0.20.0\conf\druid\single-server\micro-quickstart\router\runtime.properties 中我看到了8888端口，这恰恰也是我们的web服务端口，下意识就改了这个jvm.config 某些断点可以停住，但是我们漏洞出发点并不行，后来经过Smi1e师傅的提示，需要我改错了在此感谢~ 二、漏洞分析往上分析文章就只有阿里发出的，拿出上学的时候做阅读理解的本事，使劲看吧.... 1.定位JavaScriptDimFIlter 阿里爸爸文章一开始就提出了利用的关键类JavaScriptDimFilter，反思一下，因为对Java相关的JavaScript知识储备几乎是0

How to add @JsonIgnore annotated fields in serializing in Jackson ObectMapper

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问题 I need to add @JsonIgnore annotated fields while serializing an object by Jackson ObjectMapper . I know you may offer me to remove the @JsonIgnore annotation from my class, but I need they are ignorable in some part of my application. And in another part of my application I need to have those @JsonIgnore annotated fields in my json string. 回答1: You can define a SimpleBeanPropertyFilter and FilterProvider. First annotate your class with custom filter like this: @JsonFilter("firstFilter")