Java使用jdbc连接MySQL数据库时设有设置编码

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Erreur de syntaxe près de '????' à la ligne 1
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.base/java.lang.reflect.Constructor.newInstance(Unknown Source)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
   

String url = “jdbc:mysql://localhost:3306/exceltest1?useUnicode=true&characterEncoding=UTF-8”;