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Bad Practice: XML encoding issue using a local string variable (String readXml = Utils.readXmlFile("test.xml"))

Reading xml to a String variable is a bad idea. XML header contains the encoding meta data. When reading a file you have to know the encoding beforehand.  Also storing an XML file in a String is waste of memory.  XML parsers accept an Input Stream as a parsing source and figure out the encoding themselves correctly.  

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Mysql - java.sql.SQLNonTransientConnectionException: Public Key Retrieval is not allowed

Add allowPublicKeyRetrieval=true to the JDBC URL. jdbc:mysql://localhost:3306/db?allowPublicKeyRetrieval=true&useSSL=false