【发布时间】:2016-03-27 02:14:27
【问题描述】:
文件 src/main/scala/Test.scala:
import anorm.SQL
import anorm.SqlParser.{str, float}
import anorm._
object Test {
def main(args: Array[String]) {
val dbUrl = "jdbc:mysql://localhost:3306/test"
Class.forName("org.gjt.mm.mysql.Driver").newInstance()
implicit val conn: java.sql.Connection = java.sql.DriverManager.getConnection(dbUrl)
val parser = str("name") ~ float("weight") map { case name ~ f => (name -> f) }
val result = SQL("select name, weight from products").as(parser.single)
}
}
文件 build.sbt:
scalaVersion := "2.11.7"
libraryDependencies += "mysql" % "mysql-connector-java" % "5.1.38"
libraryDependencies += "com.typesafe.play" %% "anorm" % "2.5.0"
运行它:
$ sbt sbt-version
[info] Set current project to test (in build file:/home/david/test/)
[info] 0.13.11
$ sbt run
[info] Set current project to test (in build file:/home/david/test/)
[info] Compiling 1 Scala source to /home/david/test/target/scala-2.11/classes...
[error] missing or invalid dependency detected while loading class file 'JavaTimeColumn.class'.
[error] Could not access type ZonedDateTime in value java.time,
[error] because it (or its dependencies) are missing. Check your build definition for
[error] missing or conflicting dependencies. (Re-run with `-Ylog-classpath` to see the problematic classpath.)
[error] A full rebuild may help if 'JavaTimeColumn.class' was compiled against an incompatible version of java.time.
[error] ^
[error] (compile:compileIncremental) Compilation failed
我从头开始尝试了所有方法:一个新的 ubuntu 虚拟机,安装了 sbt 并运行它(因此,没有以前的 .m2、.sbt 或 .ivy 目录)。
【问题讨论】:
-
你用什么版本的java运行这个?
-
标明java和anorm版本
-
java 版本 1.7.0(
ubuntu /usr/lib/jvm/java-7-openjdk-amd64/jre上的 1.7.0_65,OSX 上的 1.7.0_40/Library/Java/JavaVirtualMachines/jdk1.7.0_40.jdk/Contents/Home/jre)。 anorm 版本 2.5.0,如您在 build.sbt 中所见。 -
我已经安装了 Java 1.8.0_77,现在我得到了一个更清晰的错误。它确实提到了有关缺少依赖项的任何内容,现在显示的一个错误是
not found: value ~ -
ok, anorm >=2.4.0 需要 Java 8,正如其网站中所解释的那样:playframework.com/documentation/2.5.x/Anorm 库不可能声明此要求,以便编译器可以显示有用的错误信息而不是诸如误导之类的信息?