今天在用fastjosn jar包中的JsonMapper轉對象時報錯，對象中有一個集合屬性List。網上多種解決方案，只有在類上加上@JsonIgnoreProperties({"handler","kkkkk"})
屬性有用，@JsonIgnoreProperties(ignoreUnknown = true)屬性也不行。而且神奇的是{}里面的第二個值可以隨便寫，第一個參數不能動。這個注解是什么意思呢，好奇怪
com.fasterxml.jackson.databind.JsonMappingException: No serializer found for class
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com.fasterxml.jackson.databind.JsonMappingException
com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class
jackson報錯：com.fasterxml.jackson.databind.JsonMappingException: Incompatible Jackson version: 2.9.6
HttpMessageNotWritableException: Could not write JSON: Infinite recursion (StackOverflowError); nested exception is com.fasterxml.jackson.databind.JsonMappingException: Infinite
Caused by :java.lang.ClassNotFoundException: com.fasterxml.jackson.databind.JsonMappingException
Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class org.apache.catalina.connector.CoyoteWriter and no properties discovered to create BeanSerializer
java報錯：Caused by: com.fasterxml.jackson.databind.JsonMappingException: Unexpected character (''' (code 39)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')
com.fasterxml.jackson.databind.exc.InvalidDefinitionException
com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "ExceptionId"
Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException