mysql链接修改

src/javabean/Base.java

@@ -8,7 +8,7 @@ import java.sql.SQLException;
 
 public class Base {
 	private static String driver = "com.mysql.cj.jdbc.Driver";
-	private static String url = "jdbc:mysql://localhost:3306/library?&useSSL=false&serverTimezone=UTC&userUnicode=true&characterEncoding=UTF-8";
+	private static String url = "jdbc:mysql://localhost:3306/library?&useSSL=false&serverTimezone=UTC&useUnicode=true&characterEncoding=UTF-8";
 	private static String username = "root";
 	private static String password = "root";
 

src/javabean/JDBCBean.java

@@ -7,7 +7,7 @@ import java.sql.Statement;
 
 public class JDBCBean {
 	private static String driver = "com.mysql.cj.jdbc.Driver";
-	private static String url = "jdbc:mysql://localhost:3306/library?&useSSL=false&serverTimezone=UTC&userUnicode=true&characterEncoding=UTF-8";
+	private static String url = "jdbc:mysql://localhost:3306/library?&useSSL=false&serverTimezone=UTC&useUnicode=true&characterEncoding=UTF-8";
 	private static String username = "root";
 	private static String password = "root";
 	private Connection conn = null;