jdbcUrl is required with driverClassName

【SpringBoot2】多數據源java.lang.IllegalArgumentException: jdbcUrl is required with driverClassName.

### Error querying database.  Cause: java.lang.IllegalArgumentException: jdbcUrl is required with driverClassName.
### The error may exist in com/husy/springboot/multisource/mapper/test2/Users2Mapper.java (best guess)
### The error may involve com.husy.springboot.multisource.mapper.test2.Users2Mapper.selectList
### The error occurred while executing a query
### Cause: java.lang.IllegalArgumentException: jdbcUrl is required with driverClassName.] with root cause


java.lang.IllegalArgumentException: jdbcUrl is required with driverClassName.
	at com.zaxxer.hikari.HikariConfig.validate(HikariConfig.java:951) ~[HikariCP-3.2.0.jar:na]
	at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:109) ~[HikariCP-3.2.0.jar:na]
	at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:157) ~[spring-jdbc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:115) ~[spring-jdbc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:78) ~[spring-jdbc-5.1.9.RELEASE.jar:5.1.9.RELEASE]
	at org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:80) ~[mybatis-spring-2.0.2.jar:2.0.2]
	at org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:67) ~[mybatis-spring-2.0.2.jar:2.0.2]
	at org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:336) ~[mybatis-3.5.2.jar:3.5.2]
	at com.baomidou.mybatisplus.core.executor.MybatisSimpleExecutor.prepareStatement(MybatisSimpleExecutor.java:93) ~[mybatis-plus-core-3.2.0.jar:3.2.0]
	at com.baomidou.mybatisplus.core.executor.MybatisSimpleExecutor.doQuery(MybatisSimpleExecutor.java:66) ~[mybatis-plus-core-3.2.0.jar:3.2.0]
	at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:324) ~[mybatis-3.5.2.jar:3.5.2]
	at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156) ~[mybatis-3.5.2.jar:3.5.2]
	at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109) ~[mybatis-3.5.2.jar:3.5.2]
	at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83) ~[mybatis-3.5.2.jar:3.5.2]
	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:147) ~[mybatis-3.5.2.jar:3.5.2]
	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140) ~[mybatis-3.5.2.jar:3.5.2]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_151]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_151]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_151]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_151]
	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:426) ~[mybatis-spring-2.0.2.jar:2.0.2]
	at com.sun.proxy.$Proxy58.selectList(Unknown Source) ~[na:na]
	at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:223) ~[mybatis-spring-2.0.2.jar:2.0.2]

原始配置

spring.datasource.test1.url=jdbc:mysql://localhost:3306/test-db1?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&useSSL=true
spring.datasource.test1.username=root
spring.datasource.test1.password=123456
spring.datasource.test1.driver-class-name=com.mysql.cj.jdbc.Driver

spring.datasource.test2.url=jdbc:mysql://localhost:3306/test-db1?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&useSSL=true
spring.datasource.test2.username=root
spring.datasource.test2.password=123456
spring.datasource.test2.driver-class-name=com.mysql.cj.jdbc.Driver

修改後配置：

jdbc換成 jdbc-url

spring.datasource.test1.jdbc-url=jdbc:mysql://localhost:3306/test-db1?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&useSSL=true
spring.datasource.test1.username=root
spring.datasource.test1.password=123456
spring.datasource.test1.driver-class-name=com.mysql.cj.jdbc.Driver

spring.datasource.test2.jdbc-url=jdbc:mysql://localhost:3306/test-db1?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&useSSL=true
spring.datasource.test2.username=root
spring.datasource.test2.password=123456
spring.datasource.test2.driver-class-name=com.mysql.cj.jdbc.Driver

就可以了…

---

spring.datasource.url 數據庫的 JDBC URL。
spring.datasource.jdbc-url 用來重寫自定義連接池

官方文檔的解釋是：

因爲連接池的實際類型沒有被公開，所以在您的自定義數據源的元數據中沒有生成密鑰，而且在IDE中沒有完成(因爲DataSource接口沒有暴露屬性)。另外，如果您碰巧在類路徑上有Hikari，那麼這個基本設置就不起作用了，因爲Hikari沒有url屬性(但是確實有一個jdbcUrl屬性)。在這種情況下，您必須重寫您的配置