All Questions
Tagged with spring-boot jackson
1,919
questions
130
votes
24
answers
189k
views
java.lang.IllegalArgumentException: No converter found for return value of type
With this code
@RequestMapping(value = "/bar/foo", method = RequestMethod.GET)
public ResponseEntity<foo> foo() {
Foo model;
...
return ResponseEntity.ok(...
- 16.4k
125
votes
14
answers
228k
views
How to customise the Jackson JSON mapper implicitly used by Spring Boot?
I'm using Spring Boot (1.2.1), in a similar fashion as in their Building a RESTful Web Service tutorial:
@RestController
public class EventController {
@RequestMapping("/events/all")
...
- 81k
118
votes
7
answers
187k
views
JSON parse error: Can not construct instance of java.time.LocalDate: no String-argument constructor/factory method to deserialize from String value
I am new to Spring Data REST project and I am trying to create my first RESTful service. The task is simple, but I am stuck.
I want to perform CRUD operations on a user data stored in an embedded ...
- 1,454
65
votes
9
answers
124k
views
ObjectMapper can't deserialize without default constructor after upgrade to Spring Boot 2
I have following DTOs:
@Value
public class PracticeResults {
@NotNull
Map<Long, Boolean> wordAnswers;
}
@Value
public class ProfileMetaDto {
@NotEmpty
String name;
@Email
...
- 1,872
64
votes
9
answers
223k
views
Deserialize Java 8 LocalDateTime with JacksonMapper
I have read several questions with answers here in SO concerning serialization and deserialization between java.time.LocalDateTime and JSON property but I can't seem to get it working.
I have managed ...
- 7,743
48
votes
5
answers
64k
views
Jackson serializes a ZonedDateTime wrongly in Spring Boot
I have a simple application with Spring Boot and Jetty. I have a simple controller returning an object which has a Java 8 ZonedDateTime:
public class Device {
// ...
private ZonedDateTime ...
- 21.8k
48
votes
11
answers
36k
views
MockMvc no longer handles UTF-8 characters with Spring Boot 2.2.0.RELEASE
After I upgraded to the newly released 2.2.0.RELEASE version of Spring Boot some of my tests failed. It appears that the MediaType.APPLICATION_JSON_UTF8 has been deprecated and is no longer returned ...
- 3,065
44
votes
5
answers
40k
views
Lombok 1.18.0 and Jackson 2.9.6 not working together
The deserialization is failing after the update.
I updated my micro-service from Spring 1.5.10.RELEASE to Spring 2.0.3.RELEASE and also updated the lombok from 1.16.14 to 1.18.0 and jackson-datatype-...
- 7,821
43
votes
1
answer
101k
views
Cannot deserialize value of type `java.util.Date` from String
Using Spring 1.5.8.RELEASE
Jackson mapper giving the following exception.
Cannot deserialize value of type `java.util.Date` from String "2018-09-04T10:44:46": expected format "yyyy-MM-dd'T'HH:mm:ss....
- 635
42
votes
3
answers
68k
views
Deserialize a json array to objects using Jackson and WebClient
I have a problem during the deserialization of a json array using Spring.
I have this json response from a service:
[
{
"symbol": "XRPETH",
"orderId": 12122,
"...
- 1,199
38
votes
8
answers
87k
views
Jackson date-format for OffsetDateTime in Spring Boot
I'm trying to output an OffsetDateTime from my Spring application, and have in my application.properties these properties:
spring.jackson.serialization.WRITE_DATES_AS_TIMESTAMPS=false
spring.jackson....
- 788
37
votes
6
answers
65k
views
For Spring Boot 1.2.3, how to set ignore null value in JSON serialization?
In the Spring Boot 1.2.3, we can customize the Jackson ObjectMapper via properties file. But I didn't find a attribute can set Jackson ignore null value when serialization the Object to JSON string.
...
- 562
33
votes
5
answers
58k
views
Jackson @JsonFormat set date with one day less
I have been used Spring Date Rest with Spring Boot in my project.
This project has a object and I have used the annotation @JsonFormat to format the date field that will be received from my Json.
The ...
- 513
33
votes
2
answers
80k
views
org.apache.catalina.connector.ClientAbortException: java.io.IOException: APR error: -32
At my Spring Boot + Tomcat 8 project I have configured @ControllerAdvice which looks like:
@ControllerAdvice
public class GlobalControllerExceptionHandler {
final static Logger logger = ...
- 25k
30
votes
4
answers
56k
views
Cannot construct instance of `java.time.LocalDate` - Spring boot, elasticseach, jackson
I'm using Spring-boot 2.0.0.M7 and spring-boot-starter-data-elasticsearch and elasticsearch 5 and I'm getting an error by deserializing a LocalDate field.
My Document looks like that:
@Document(...
- 12.6k
29
votes
4
answers
69k
views
How to make default time zone apply in Spring Boot Jackson Date serialization
I have configured my Spring Boot application to serialize dates as ISO8601 strings:
spring:
jackson:
serialization:
write-dates-as-timestamps: false
This is what I am getting:
"someDate"...
- 23.9k
26
votes
12
answers
29k
views
How to configure Jackson ObjectMapper for Camel in Spring Boot
I am trying to serialize and deserialize POJOs to and from JSON on Camel routes using Jackson. Some of these have Java 8 LocalDate fields, and I want them to be serialised as YYYY-MM-DD string, not as ...
- 1,242
25
votes
5
answers
37k
views
openapi springboot generator jackson no String-argument constructor/factory method to deserialize from String value
I'm using OpenApi SpringBoot generator to generate controller interfaces and models. This creates model classes with JsonNullable<String> for nullable fields. However I'm getting a Jackson type ...
25
votes
3
answers
110k
views
JsonMappingException: Can not deserialize instance of java.lang.Integer out of START_OBJECT token
I wanted to write a small and simple REST service using Spring Boot.
Here is the REST service code:
@Async
@RequestMapping(value = "/getuser", method = POST, consumes = "application/json", produces = ...
- 253
24
votes
3
answers
27k
views
How to customise Jackson in Spring Boot 1.4
I've been unable to find examples of how to use Jackson2ObjectMapperBuilderCustomizer.java in spring boot 1.4 to customise the features of Jackson.
The doco for customising Jackson in boot 1.4 - https:...
- 754
22
votes
1
answer
24k
views
Validation nested models in spring boot
I have a problem with validation of nested models, look:
class A{
@NotNull
Integer i;
B b;
}
class B{
@NotNull
Integer j;
}
In spring controller:
@Valid @RequestBody...
It ...
user6023611
22
votes
1
answer
16k
views
When does Jackson require no-arg constructor for deserialization?
In my spring boot project, I noticed a strange Jackson behavior. I searched over internet, found out what to do, but haven't found out why.
UserDto:
@Setter
@Getter
@AllArgsConstructor
public class ...
- 271
22
votes
4
answers
14k
views
Mapping query parameters to @ModelAttribute does not respect @JsonProperty name
@GetMapping("item")
public @ResponseBody String get(@ModelAttribute Item item)
Item has the attributes
name
itemType
When I access /item?name=foo&item_type=bar the item gets
populated only ...
- 2,278
22
votes
4
answers
31k
views
Catching & Handling Jackson Exceptions with a custom message
I'm hoping to to catch some jackson exceptions that are occurring in a spring-boot API I am developing. For example, I have the following request class and I want to catch the error that occurs when ...
- 2,030
21
votes
3
answers
17k
views
How to dynamically ignore a property on Jackson serialization
I have an entity with multiple @ManyToOne associations. I am using spring-boot to expose a REST API. Currently, I have multiple REST API's which return a JSON response of the whole entity, including ...
- 6,054
21
votes
1
answer
37k
views
How to Use Spring Boot's 'spring.jackson.date-format' Property?
According to the Current SpringBoot Reference Guide if I set the spring.jackson.date-format property, it will: Date format string or a fully-qualified date format class name. For instance 'yyyy-MM-dd ...
- 1,921
20
votes
1
answer
87k
views
Jackson Converting String to Object
Link.java
@JsonInclude(JsonInclude.Include.NON_NULL)
@JsonPropertyOrder({ "rel", "href","method" })
public class Link {
@JsonProperty("rel")
private String rel;
@JsonProperty("href")
...
- 1,087
20
votes
3
answers
13k
views
Stop Jackson from changing case of variable names
I am using Jackson in Spring to serialize my class to JSON. When I serialize a class like the example below, Jackson is changing the names of certain fields from Camel Case to lower case. I know I can ...
- 1,949
19
votes
8
answers
32k
views
Spring REST, JSON "Can not handle managed/back reference 'defaultReference'" 415 Unsupported Media Type
I am trying to POST to http://localhost:9095/translators from an AngularJS front-end using Spring boot/Spring RestController backend.
I can do a GET and the response is like following:
[{"userId":1,"...
- 5,149
19
votes
7
answers
21k
views
Jackson is ignoring spring.jackson.properties in my spring boot application
Jackson is ignoring spring.jackson.property-naming-strategy=SNAKE_CASE.
I am using springBootVersion 1.4.2.RELEASE. In my application.properties file, I have added
spring.jackson.property-naming-...
- 15.9k
19
votes
2
answers
37k
views
Spring @RestController custom JSON deserializer
I want to use custom JSON deserializer for some classes(Role here) but I can't get it working. The custom deserializer just isn't called.
I use Spring Boot 1.2.
Deserializer:
public class ...
- 3,001
19
votes
5
answers
32k
views
How to deserialize Joda DateTime using Jackson with Jersey 2 Client in Spring MVC?
I've been bashing my head with this proof of concept for a while. I want to consume a REST endpoint that returns JSON payload with an ISO8601 UTC timestamp:
{ ...
"timestamp" : "2014-08-20T11:51:...
- 680
19
votes
4
answers
19k
views
Spring Boot: Wrapping JSON response in dynamic parent objects
I have a REST API specification that talks with back-end microservices, which return the following values:
On "collections" responses (e.g. GET /users) :
{
users: [
{
... // ...
- 3,610
19
votes
2
answers
21k
views
"Provider com.fasterxml.jackson.module.jaxb.JaxbAnnotationModule not found" after Spring Boot Upgrade
I get this exception message after upgrading Spring Boot from 2.1.5 to 2.2.2, when I try to start the Application.
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error ...
- 191
18
votes
6
answers
32k
views
Spring Boot 2.5.0 and InvalidDefinitionException: Java 8 date/time type `java.time.Instant` not supported by default
After update from Spring Boot 2.4.5 to Spring 2.5.0 I noticed the following exceptions in the application logs:
Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Java 8 date/...
- 25k
18
votes
10
answers
65k
views
Could not write JSON: failed to lazily initialize a collection of role
I tried to implement a REST service with Java, Hibernate, and Spring, which returns JSON.
I have map a many to many relation. I have a supplier that has a list of ingredients, and each ingredient has ...
user3336884
18
votes
2
answers
31k
views
Spring Boot - Encrypt JSON data
In our application we have to encrypt/decrypt the Json property values (not the property name) for each request and response.
Example,
{"userName":"encrypted value", "email":"encrypted value"}
We ...
- 395
17
votes
1
answer
16k
views
Spring WebFlux - ServerResponse Jackson Serializer problems
I have a problem during sending a HTTP GET request to my web server. Here is a snippet of code which is responsible for this resource:
@GetMapping("/events")
public Mono<ServerResponse> ...
- 173
17
votes
5
answers
42k
views
org.springframework.web.reactive.function.UnsupportedMediaTypeException: Content type 'text/xml;charset=UTF-8' not supported for bodyType
using Java 11, SpringBoot 2, WebFlux, WebClient and Jackson
trying to use Spring WebClient to consume a Web service endpoint that returns XML, content type: 'text/xml;charset=UTF-8'
Jackson XML ...
- 8,690
16
votes
5
answers
25k
views
spring boot Joda DateTime Serialisation
I'm trying to serialize Joda DateTime properties as ISO-8601 using Spring Boot v1.2.0.BUILD-SNAPSHOT
Here is my very simple REST Application.
@RestController
@Configuration
@ComponentScan
@...
- 161
16
votes
2
answers
2k
views
Lombok + Jackson immutables
After updating my project to Spring Boot 1.5.10
Lombok stopped working correctly with Jackson.
I mean immutable DTOs creation, when field names in my objects are not same as fields in json request:
@...
- 161
15
votes
6
answers
16k
views
Configure Jackson to omit lazy-loading attributes in Spring Boot
In spring boot mvc project with pure java configuration how to configure Jackson to omit lazy load Attributes
- 1,465
15
votes
2
answers
33k
views
How to rename json objects(variables) name in spring boot
Hello I am new to spring boot and JSON and need help in renaming the variable name coming in response.
Consider this as a input
"1": {
"id": "1",
"firstName": "Cdgdghirayu",
...
- 213
15
votes
3
answers
32k
views
Spring Boot issues serializing java.time.LocalDateTime with Jackson to return ISO-8601 JSON timestamps?
I'm working on converting some models in a spring-boot REST API app to use java 8's java.time.LocalDateTime instead of joda's DateTime. I want the timestamps returned from API call to adhere to the ...
- 28.6k
15
votes
2
answers
16k
views
How to configure Jackson in spring boot application without overriding springs default setting in pure java
In my spring boot application i am using Jackson to serialize objects by injecting the ObjectMapper where needed.
I found this answer: https://stackoverflow.com/a/32842962/447426
But this one creates ...
- 12.9k
15
votes
1
answer
9k
views
JSON parse error: Already had POJO for id
I already saw some question about this topic but i could not apply it to my case because I tried to apply them and the error continued.
so I come to expose my situation.
I read some comments about ...
14
votes
1
answer
17k
views
Setting Jackson feature WRITE_DATES_AS_TIMESTAMPS not working in Spring Boot
I set spring.jackson.serialization.WRITE_DATES_AS_TIMESTAMPS=false in the Spring Boot config but the Jackson serializer still produces [1942,4,2] instead of "1942-04-02" for a DateTime value.
Some ...
- 23.2k
14
votes
1
answer
6k
views
How to map mock mvc GET call into java POJO?
I have a rest controller method that returns an object CompositeObject that contains within it several other objects and structures (Maps and Lists). I want to write a test that tests whether the rest ...
- 985
13
votes
2
answers
70k
views
Spring Boot Automatic JSON to Object at Controller
I have SpringBoot application with that dependencies:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jersey</...
- 73.9k
13
votes
3
answers
16k
views
Alternatives for PropertyNamingStrategy.SNAKE_CASE or PropertyNamingStrategy.SnakeCaseStrategy as it is deprecated now
In prior versions of jackson, we were using the following two ways to modify the Property Naming during serialization and deserialization of objects.
First way:
Mentioning the following annotation on ...
- 133