H2 无法创建数据库 JdbcSQLNonTransientConnectionException

错误信息

Caused by: org.h2.jdbc.JdbcSQLNonTransientConnectionException: A file path that is implicitly relative to the current working directory is not allowed in the database URL "jdbc:h2:file:testdb". Use an absolute path, ~/name, ./name, or the baseDir setting instead. [90011-214]
    at org.h2.message.DbException.getJdbcSQLException(DbException.java:678) ~[h2-2.1.214.jar:2.1.214]
    at org.h2.message.DbException.getJdbcSQLException(DbException.java:477) ~[h2-2.1.214.jar:2.1.214]
    at org.h2.message.DbException.get(DbException.java:223) ~[h2-2.1.214.jar:2.1.214]
    at org.h2.message.DbException.get(DbException.java:199) ~[h2-2.1.214.jar:2.1.214]
    at org.h2.engine.ConnectionInfo.getName(ConnectionInfo.java:464) ~[h2-2.1.214.jar:2.1.214]
    at org.h2.engine.Engine.openSession(Engine.java:49) ~[h2-2.1.214.jar:2.1.214]
    at org.h2.engine.Engine.openSession(Engine.java:222) ~[h2-2.1.214.jar:2.1.214]
    at org.h2.engine.Engine.createSession(Engine.java:201) ~[h2-2.1.214.jar:2.1.214]
    at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:338) ~[h2-2.1.214.jar:2.1.214]
    at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:122) ~[h2-2.1.214.jar:2.1.214]
    at org.h2.Driver.connect(Driver.java:59) ~[h2-2.1.214.jar:2.1.214]
    at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138) ~[HikariCP-4.0.3.jar:na]
    at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:364) ~[HikariCP-4.0.3.jar:na]
    at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206) ~[HikariCP-4.0.3.jar:na]
    at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:476) ~[HikariCP-4.0.3.jar:na]
    at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:561) ~[HikariCP-4.0.3.jar:na]
    at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) ~[HikariCP-4.0.3.jar:na]
    at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) ~[HikariCP-4.0.3.jar:na]
    at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122) ~[hibernate-core-5.6.12.Final.jar:5.6.12.Final]
    at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess.obtainConnection(JdbcEnvironmentInitiator.java:181) ~[hibernate-core-5.6.12.Final.jar:5.6.12.Final]
    at org.hibernate.resource.transaction.backend.jdbc.internal.DdlTransactionIsolatorNonJtaImpl.getIsolatedConnection(DdlTransactionIsolatorNonJtaImpl.java:44) ~[hibernate-core-5.6.12.Final.jar:5.6.12.Final]

错误原因

配置jdbc url时没有添加明确路径，填写的是jdbc:h2:file:testdb，应使用绝对路径或相对路径。

如：/testdb，~/testdb，./testdb。

解决方法

spring:
  datasource:
    url: jdbc:h2:file:./testdb

备注

只有file类型会有路径要求，对于mem内存数据库没有此要求。