当使用JDBC函数将R连接到amazon redshift时(我使用的是Windows 10),我收到以下错误:
Error in .jfindClass(as.character(driverClass)[1]) : class not found
我正在运行的代码是
install.packages("rJava")
install.packages("RJDBC")
library(rJava)
library(RJDBC)
download.file('http://s3.amazonaws.com/redshift-downloads/drivers/RedshiftJDBC41-1.1.13.1013.jar','RedshiftJDBC41-1.1.13.1013.jar')
driver <- JDBC("com.amazon.redshift.jdbc41.Driver", "RedshiftJDBC41-1.1.13.1013.jar", identifier.quote = "`")
为了获得有关错误的更多信息,我运行了这个:
.jclassLoader()$setDebug(1L)
并且完整的错误跟踪是:
RJavaClassLoader: added 'RedshiftJDBC41-1.1.13.1013.jar' to the URL class path loader
RJavaClassLoader: adding Java archive file 'RedshiftJDBC41-1.1.13.1013.jar' to the internal class path
RJavaClassLoader: added 'C:/Users/user/Documents/R/win-library/3.2/RJDBC/java/RJDBC.jar' to the URL class path loader
RJavaClassLoader: adding Java archive file 'C:/Users/user/Documents/R/win-library/3.2/RJDBC/java/RJDBC.jar' to the internal class path
RJavaClassLoader@33909752.findClass(com.amazon.redshift.jdbc41.Driver)
- URL loader did not find it: java.lang.ClassNotFoundException: com.amazon.redshift.jdbc41.Driver
RJavaClassLoader.findClass("com.amazon.redshift.jdbc41.Driver")
- trying class …