JAVA 调用存储过程出错。提示：ORA-00917: missing comm?400报错

JAVA 调用存储过程出错。提示：ORA-00917: missing comma(丢失逗号)? 400 报错

//我的JAVA调用代码为： Connection conn = UtilDB.getInstance().getConnection(); String call= "{call P_USERMAP(?,?)}"; CallableStatement pst = conn.prepareCall(call); pst.setString(1,"INSERT INTO USERMAP(OBJID,USERNAME) VALUES(USERMAPS.NEXTVAL,''**********'') returning OBJID into :1"); pst.registerOutParameter(2,Types.VARCHAR); pst.execute();

//提示：ORA-00917: missing comma(丢失逗号) 找不出原因不知道为什么请高手回答。

##存储过程为#######
create or replace
procedure P_UserMap(v_sql in varchar, id out varchar) is
begin
  execute immediate v_sql returning into id;
end P_UserMap;

###调用方式为：
DECLARE
  V_SQL VARCHAR2(200);
  ID VARCHAR2(200);
BEGIN
  V_SQL := 'INSERT INTO USERMAP(OBJID,USERNAME) VALUES(USERMAPS.NEXTVAL,''******'')   returning OBJID into :1';

  P_USERMAP(
    V_SQL => V_SQL,
    ID => ID
  );
  DBMS_OUTPUT.PUT_LINE('ID = ' || ID);
END;
######返回结果为：ID = 742