org.apache.spark.SparkException：在java中不可序列化的任务

i'm trying use spark graphx. before that i wanted to arrange my vertex and edge rdd using dataframes. for that purpose i used JavaRdd map function.but i'm getting above error.i tried various ways to fix this issue.i serialized tha whole class.but it didn't work.and also i implement Function and Serializable classes in one class ind used it in map function.but it aslo didn't work.please help me in advance.i'm trying use spark graphx. before that i want