Correct set of dependencies for using Jackson mapper

Question

I am new to Jackson and I was writing some code for practice  I found out the the new version of Jackson library can be found on Fasterxml  Jackson  so I added the below dependencies to my Maven pom file    lt dependency gt       lt groupId gt com fasterxml jackson core lt  groupId gt       lt artifactId gt jackson-annotations lt  artifactId gt       lt version gt 2 2 2 lt  version gt   lt  dependency gt   lt dependency gt       lt groupId gt com fasterxml jackson core lt  groupId gt       lt artifactId gt jackson-core lt  artifactId gt       lt version gt 2 2 2 lt  version gt   lt  dependency gt   lt dependency gt       lt groupId gt com fasterxml jackson core lt  groupId gt       lt artifactId gt jackson-databind lt  artifactId gt       lt version gt 2 2 2 lt  version gt   lt  dependency gt    I was expecting that I can use the ObjectMapper directly  however after spending a lot of time I found out that to use the ObjectMapper I have to add the old libraries below    lt dependency gt       lt groupId gt org codehaus jackson lt  groupId gt       lt artifactId gt jackson-mapper-asl lt  artifactId gt       lt version gt 1 9 2 lt  version gt   lt  dependency gt   lt dependency gt       lt groupId gt org codehaus jackson lt  groupId gt       lt artifactId gt jackson-core-asl lt  artifactId gt       lt version gt 1 9 2 lt  version gt   lt  dependency gt    I am a bit confused  Could someone please tell me why is that

User · Answer

lt properties gt     lt  -- Use the latest version whenever possible  -- gt     lt jackson version gt 2 4 4 lt  jackson version gt   lt  properties gt   lt dependencies gt      lt dependency gt       lt groupId gt com fasterxml jackson core lt  groupId gt       lt artifactId gt jackson-databind lt  artifactId gt       lt version gt   jackson version  lt  version gt     lt  dependency gt   lt  dependencies gt    you have a ObjectMapper  from Jackson Databind package  handy  if so  you can do   JsonFactory factory   objectMapper getFactory      Source  https   github com FasterXML jackson-core  So  the 3  fasterxml  dependencies which you already have in u r pom are enough for ObjectMapper as it includes jackson-databind

User · Answer

The package names in Jackson 2 x got changed to com fasterxml1 from org codehaus2  So if you just need ObjectMapper  I think Jackson 1 X can satisfy with your needs

User · Answer

Apart from fixing the imports  do a fresh maven clean compile -U  Note the -U option  that brings in new dependencies which sometimes the editor has hard time with  Let the compilation fail due to un-imported classes  but at least you have an option to import them after the maven command   Just doing Maven- Reimport from Intellij did not work for me

User · Answer

I spent few hours on this   Even if I had the right dependency the problem was fixed only after I deleted the com fasterxml jackson folder in the  m2 repository under C  Users username m2 and updated the project

User · Answer

No  you can simply use com fasterxml jackson databind ObjectMapper  Most likely you forgot to fix your import-statements  delete all references to codehaus and you re golden

[java] Correct set of dependencies for using Jackson mapper

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