严重: create connection SQLException, url: jdbc:mysql://localhost:3306/db2?&useSSL=false&serverTimezone=UTC, errorCode 0, state 08001
java.sql.SQLNonTransientConnectionException: Cannot load connection class because of underlying exception: com.mysql.cj.exceptions.WrongArgumentException: Malformed database URL, failed to parse the connection string near ‘;useSSL=false&serverTimezone=UTC‘.
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:110)
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89)
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63)
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:73)
	at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:79)
	at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:131)
	at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:219)
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1644)
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1710)
	at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2753)
Caused by: com.mysql.cj.exceptions.UnableToConnectException: Cannot load connection class because of underlying exception: com.mysql.cj.exceptions.WrongArgumentException: Malformed database URL, failed to parse the connection string near ‘;useSSL=false&serverTimezone=UTC‘.
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105)
	... 4 more
Caused by: com.mysql.cj.exceptions.WrongArgumentException: Malformed database URL, failed to parse the connection string near ‘;useSSL=false&serverTimezone=UTC‘.
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
	at com.mysql.cj.conf.ConnectionUrlParser.processKeyValuePattern(ConnectionUrlParser.java:539)
	at com.mysql.cj.conf.ConnectionUrlParser.parseQuerySection(ConnectionUrlParser.java:519)
	at com.mysql.cj.conf.ConnectionUrlParser.getProperties(ConnectionUrlParser.java:644)
	at com.mysql.cj.conf.ConnectionUrl.collectProperties(ConnectionUrl.java:303)
	at com.mysql.cj.conf.ConnectionUrl.<init>(ConnectionUrl.java:288)
	at com.mysql.cj.conf.url.SingleConnectionUrl.<init>(SingleConnectionUrl.java:47)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
	at com.mysql.cj.util.Util.handleNewInstance(Util.java:191)
	at com.mysql.cj.util.Util.getInstance(Util.java:166)
	at com.mysql.cj.util.Util.getInstance(Util.java:173)
	at com.mysql.cj.conf.ConnectionUrl.getConnectionUrlInstance(ConnectionUrl.java:200)
	at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:196)
	... 3 more

db.properties文件里的url写错了

user=root
pwd=root
url=jdbc:mysql://localhost:3306/db2?&useSSL=false&serverTimezone=UTC
driverClassName=com.mysql.cj.jdbc.Driver

改成

user=root
pwd=root
url=jdbc:mysql://localhost:3306/db2?&useSSL=false&serverTimezone=UTC
driverClassName=com.mysql.cj.jdbc.Driver

在xml配置文件中需要将&转义，为&

Execption:com.mysql.cj.exceptions.WrongArgumentException: Malformed database URL, failed to parse the connection string near ';useSSL=false&serverTimezone=UTC'