Could not resolve placeholder 'spring.datasource.driverClassName' in value "${spring.datasource.drive

无法解析占位符 # 039；spring . data source . driver class name # 039；在价值上 quot＄{ spring . data source . driver class name } 无法解析占位符 # 039；spring . data source . driver class name # 039；在价值上 quot$ { spring . data source . driver class name } Introduction:无法解析占位符 # 039；spring . data source . driver class name # 039；在价值上 quot${spring.datasource.driv