Tag Archives: com.fasterxml.jackson.databind.exc.InvalidFormatException

[Solved] com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `int` from String “C21”: not a valid Integer value


InvalidFormatException is subclass of MismatchedInputException. InvalidFormatException occurred because of bad formatting or format not match with the presepecified format of value to deserialize.

InvalidFormatException Example

The issue is passing type is String while deserialization expecting as Int.

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;

public class StudentDetail {
private int rollNumber;
private String firstName;
private String lastName;

//getter and setter of class
}
import java.io.IOException;

import com.fasterxml.jackson.databind.ObjectMapper;

public class TestJacksonExample2 {

public static void main(String[] args) {

String json="{\"rollNumber\":\"C21\" , \"firstName\":\"Saurabh\" , \"lastName\":\"Gupta\"}";

System.out.println(json);
try
{
ObjectMapper mapper = new ObjectMapper();
StudentDetail student= mapper.readValue(json, StudentDetail.class);
System.out.println(student);
}
catch(IOException ex)
{
ex.printStackTrace();
}
catch(Exception ex)
{
ex.printStackTrace();
}

}

}

InvalidFormatException Stacktrace


{"rollNumber":"C21" , "firstName":"Saurabh" , "lastName":"Gupta"}
com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `int` from String "C21": not a valid Integer value
 at [Source: (String)"{"rollNumber":"C21" , "firstName":"Saurabh" , "lastName":"Gupta"}"; line: 1, column: 15] (through reference chain: com.fiot.json.jackson.exceptions.StudentDetail["rollNumber"])
    at com.fasterxml.jackson.databind.exc.InvalidFormatException.from(InvalidFormatException.java:67)
    at com.fasterxml.jackson.databind.DeserializationContext.weirdStringException(DeserializationContext.java:1549)
    at com.fasterxml.jackson.databind.DeserializationContext.handleWeirdStringValue(DeserializationContext.java:911)
    at com.fasterxml.jackson.databind.deser.std.NumberDeserializers$IntegerDeserializer._parseInteger(NumberDeserializers.java:522)
    at com.fasterxml.jackson.databind.deser.std.NumberDeserializers$IntegerDeserializer.deserialize(NumberDeserializers.java:474)
    at com.fasterxml.jackson.databind.deser.std.NumberDeserializers$IntegerDeserializer.deserialize(NumberDeserializers.java:452)
    at com.fasterxml.jackson.databind.deser.impl.FieldProperty.deserializeAndSet(FieldProperty.java:138)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:288)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:151)
    at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4013)
    at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3004)
    at com.fiot.json.jackson.exceptions.TestJacksonExample2.main(TestJacksonExample2.java:18)

Solutions

Pass value as the compatible type, here in this case number value roll number can’t accept as a text string with an alphanumeric.

In such cases, if your organization is using rollNumber as alphanumeric then convert int to String to make compatible. or ask your client application to pass the value of rollNumber as an int value.

References

https://fasterxml.github.io/jackson-databind/javadoc/2.9/com/fasterxml/jackson/databind/exc/InvalidFormatException.html

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[Solved] com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `java.util.Date` from String “MM/dd/yyyy”: not a valid representation for date format


InvalidFormatException is subclass of MismatchedInputException. InvalidFormatException occurred because of bad formatting or format not match with the prespecified format of value to deserialize.

InvalidFormatException Example

This example throwing InvalidFormatException because JSONis having the format “MM/dd/yyyy” for dob which is not compatible with standard date format for deserializations. Below is a standard format for a date as JACKSON support:

  • yyyy-MM-dd’T’HH:mm:ss.SSSZ
  • yyyy-MM-dd’T’HH:mm:ss.SSS
  • EEE, dd MMM yyyy HH:mm:ss zzz
  • yyyy-MM-dd
import java.util.Date;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
import com.fasterxml.jackson.annotation.JsonFormat;

public class StudentDetail {
private int rollNumber;
private String firstName;
private String lastName;
private Date dob;
//getter and setter of class
}
import java.io.IOException;

import com.fasterxml.jackson.databind.ObjectMapper;

public class TestJacksonExample2 {

public static void main(String[] args) {

String json="{\"rollNumber\":21 , \"firstName\":\"Saurabh\" , \"lastName\":\"Gupta\",  \"dob\":\"12/13/1985\"}";

System.out.println(json);
try
{
ObjectMapper mapper = new ObjectMapper();
StudentDetail student= mapper.readValue(json, StudentDetail.class);
System.out.println(student);
}
catch(IOException ex)
{
ex.printStackTrace();
}
catch(Exception ex)
{
ex.printStackTrace();
}

}

}

InvalidFormatException Stacktrace


com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `java.util.Date` from String "12/13/1985": not a valid representation (error: Failed to parse Date value '12/13/1985': Cannot parse date "12/13/1985": not compatible with any of standard forms ("yyyy-MM-dd'T'HH:mm:ss.SSSZ", "yyyy-MM-dd'T'HH:mm:ss.SSS", "EEE, dd MMM yyyy HH:mm:ss zzz", "yyyy-MM-dd"))
 at [Source: (String)"{"rollNumber":21 , "firstName":"Saurabh" , "lastName":"Gupta",  "dob":"12/13/1985"}"; line: 1, column: 71] (through reference chain: com.fiot.json.jackson.exceptions.StudentDetail["dob"])
    at com.fasterxml.jackson.databind.exc.InvalidFormatException.from(InvalidFormatException.java:67)
    at com.fasterxml.jackson.databind.DeserializationContext.weirdStringException(DeserializationContext.java:1549)
    at com.fasterxml.jackson.databind.DeserializationContext.handleWeirdStringValue(DeserializationContext.java:911)
    at com.fasterxml.jackson.databind.deser.std.StdDeserializer._parseDate(StdDeserializer.java:524)
    at com.fasterxml.jackson.databind.deser.std.StdDeserializer._parseDate(StdDeserializer.java:467)
    at com.fasterxml.jackson.databind.deser.std.DateDeserializers$DateBasedDeserializer._parseDate(DateDeserializers.java:195)
    at com.fasterxml.jackson.databind.deser.std.DateDeserializers$DateDeserializer.deserialize(DateDeserializers.java:285)
    at com.fasterxml.jackson.databind.deser.std.DateDeserializers$DateDeserializer.deserialize(DateDeserializers.java:268)
    at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:129)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:288)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:151)
    at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4013)

Solutions

  1. Pass date format for JSON as the standard one for deserializations.
    • yyyy-MM-dd’T’HH:mm:ss.SSSZ
    • yyyy-MM-dd’T’HH:mm:ss.SSS
    • EEE, dd MMM yyyy HH:mm:ss zzz
    • yyyy-MM-dd
  2. Use annotation @JsonFormat as below to support some other new date format.
    public class StudentDetail {
    private int rollNumber;
    private String firstName;
    private String lastName;
    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "MM/dd/yyyy")
    private Date dob;
    //getter and setter of class
    }
    

Preferences

https://fasterxml.github.io/jackson-databind/javadoc/2.9/com/fasterxml/jackson/databind/exc/InvalidFormatException.html

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Follow below link to learn more on JSON and  JSON issues solutions: