play框架:包javax.inject不存在

dw1jzc5e  于 2021-07-13  发布在  Java
关注(0)|答案(1)|浏览(453)

在我的play 2.0 framework java项目中,以下行在eclipse和sbt编译步骤中都会产生错误:

import javax.inject.*;

我已经添加了 javax.inject 依赖于my build.sbt文件:

libraryDependencies ++= Seq(
    javaCore,
    javaJdbc,
    javaEbean,
    javaWs,
    javaFooBar,
    cache,
    "javax.inject" % "javax.inject" % "1",
    "org.atmosphere" % "atmosphere-play" % "2.1.1"
)

并被处决 clean , update & eclipse with-source=true 像疯了一样:

[myproject] $ eclipse with-source=true
[info] About to create Eclipse project files for your project(s).
[info] Compiling 3 Scala sources and 12 Java sources to ./myproject/target/scala-2.11/classes...
[error] ./myproject/app/com/elements/legacy/LegacyController.java:3: object inject is not a member of package javax
[error] import javax.inject.*;
[error]        ^
[error] one error found
[error] (compile:compile) Compilation failed
[info] Resolving jline#jline;2.11 ...
[error] Could not create Eclipse project files:
[error] Error evaluating task 'dependencyClasspath': error

我觉得sbt不会在依赖关系无法解决的情况下抛出错误(例如上面的javafoobar)。如何激活?
如何使用javax.inject正确构建Play2.0Java项目?
谢谢!
编辑:
通过以下方式扩展project/plugins.sbt中的存储库列表达到了目的:

// The repositories
resolvers ++= Seq(
    Resolver.sonatypeRepo("snapshots"),
    Resolver.sonatypeRepo("releases"), 
    Resolver.typesafeRepo("snapshots"), 
    Resolver.typesafeRepo("releases")
)

这个 dependencies donovan所描述的命令对于检查依赖项是否可以被解析非常有帮助!

kh212irz

kh212irz1#

这看起来像是在activator中重新加载项目定义失败。
如果用以下内容更新build.sbt,项目仍然可以正确编译不是因为依赖关系没有问题,而是因为它不知道更改。

libraryDependencies ++= Seq(
  javaJdbc,
  javaEbean,
  cache,
  javaWs,
  "foo" % "bar" % "1.0"
)

编译消息:

[exampleApp] $ compile
[success] Total time: 0 s, completed 29-apr-2015 9:13:30

如果我现在 reload 我的项目配置,我们将开始看到问题。

[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  ::          UNRESOLVED DEPENDENCIES         ::
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  :: foo#bar;1.0: not found
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[trace] Stack trace suppressed: run last *:update for the full output.
[error] (*:update) sbt.ResolveException: unresolved dependency: foo#bar;1.0: not found

如果您添加了一个需要特殊解析程序(例如快照等)的依赖项,您就会看到这一点。
让我们从build.sbt中删除该行,然后 reload 所以我们可以正确编译,然后为项目中不存在的包添加导入。
build.sbt(后面是重新加载)

libraryDependencies ++= Seq(
  javaJdbc,
  javaEbean,
  cache,
  javaWs
)

应用程序.java

import play.*;
import play.mvc.*;

import views.html.*;
import foo.bar.*;

public class Application extends Controller {

    public static Result index() {
        return ok(index.render("Your new application is ready."));
    }
}

在中编译此结果

[error] D:\tmp\exampleApp\app\controllers\Application.java:7: error: package foo.bar does not exist
[error] import foo.bar.*;
[error] ^
[error] 1 error
[error] (compile:compile) javac returned nonzero exit code

这两个错误有非常明显的特征,这与 dependencies 如上所述,应该有助于引导你到正确的地方。

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