怎么使用h2 持久化spring session

[来日不方长]

按照spring官方文档的配置，启动总是报 No converter found capable of converting from type [java.lang.Object] to type [byte[]]
具体错误如下：
org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type [java.lang.Object] to type [byte[]]
at org.springframework.core.convert.support.GenericConversionService.handleConverterNotFound(GenericConversionService.java:324)
at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:206)
at org.springframework.session.jdbc.JdbcOperationsSessionRepository.serialize(JdbcOperationsSessionRepository.java:627)
at org.springframework.session.jdbc.JdbcOperationsSessionRepository.access$400(JdbcOperationsSessionRepository.java:129)
at org.springframework.session.jdbc.JdbcOperationsSessionRepository$1$2.setValues(JdbcOperationsSessionRepository.java:403)
at org.springframework.jdbc.core.JdbcTemplate$4.doInPreparedStatement(JdbcTemplate.java:960)
at org.springframework.jdbc.core.JdbcTemplate$4.doInPreparedStatement(JdbcTemplate.java:950)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:633)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:662)
at org.springframework.jdbc.core.JdbcTemplate.batchUpdate(JdbcTemplate.java:950)
at org.springframework.session.jdbc.JdbcOperationsSessionRepository$1.doInTransactionWithoutResult(JdbcOperationsSessionRepository.java:395)
at org.springframework.transaction.support.TransactionCallbackWithoutResult.doInTransaction(TransactionCallbackWithoutResult.java:34)
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
at org.springframework.session.jdbc.JdbcOperationsSessionRepository.save(JdbcOperationsSessionRepository.java:377)
at org.springframework.session.jdbc.JdbcOperationsSessionRepository.save(JdbcOperationsSessionRepository.java:129)
at org.springframework.session.web.http.SessionRepositoryFilter$SessionRepositoryRequestWrapper.commitSession(SessionRepositoryFilter.java:245)
at org.springframework.session.web.http.SessionRepositoryFilter$SessionRepositoryRequestWrapper.access$100(SessionRepositoryFilter.java:217)
at org.springframework.session.web.http.SessionRepositoryFilter.doFilterInternal(SessionRepositoryFilter.java:170)
at org.springframework.session.web.http.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:80)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

[来日不方长]

@Bean
    public DataSource dataSource() {
        return new EmbeddedDatabaseBuilder()
                .setType(EmbeddedDatabaseType.H2)
                .continueOnError(true)
                .setDataSourceFactory(new DataSourceFactory() {

                    private final SimpleDriverDataSource dataSource = new SimpleDriverDataSource(
                            BeanUtils.instantiateClass(org.h2.Driver.class),
                            "jdbc:h2:" + filePath + ";DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=false", "sa", "");

                    @Override
                    public ConnectionProperties getConnectionProperties() {
                        return new ConnectionProperties() {
                            @Override
                            public void setDriverClass(Class<? extends Driver> driverClass) {
                                dataSource.setDriverClass(driverClass);
                            }

                            @Override
                            public void setUrl(String url) {
//                                dataSource.setUrl(url);
                            }

                            @Override
                            public void setUsername(String username) {
//                                dataSource.setUsername(username);
                            }

                            @Override
                            public void setPassword(String password) {
//                                dataSource.setPassword(password);
                            }
                        };
                    }

这样可以持久化到磁盘上，但是不能有多个数据源，如需多个数据源需要重写spring session的配置类JdbcHttpSessionConfiguration

@Bean
	public JdbcTemplate springSessionJdbcOperations(DataSource dataSource) {
		return new JdbcTemplate(dataSource);
	}

	@Bean
	public JdbcOperationsSessionRepository sessionRepository(
			@Qualifier("springSessionJdbcOperations") JdbcOperations jdbcOperations,
			PlatformTransactionManager transactionManager) {
		JdbcOperationsSessionRepository sessionRepository =
				new JdbcOperationsSessionRepository(jdbcOperations, transactionManager);
		String tableName = getTableName();
		if (StringUtils.hasText(tableName)) {
			sessionRepository.setTableName(tableName);
		}
		sessionRepository
				.setDefaultMaxInactiveInterval(this.maxInactiveIntervalInSeconds);
		if (this.lobHandler != null) {
			sessionRepository.setLobHandler(this.lobHandler);
		}
		if (this.springSessionConversionService != null) {
			sessionRepository.setConversionService(this.springSessionConversionService);
		}
		else if (this.conversionService != null) {
			sessionRepository.setConversionService(this.conversionService);
		}
		else if (deserializingConverterSupportsCustomClassLoader()) {
			GenericConversionService conversionService = createConversionServiceWithBeanClassLoader();
			sessionRepository.setConversionService(conversionService);
		}
		return sessionRepository;
	}