Java Play 中的配置 - ebean 和 postgresql

Posted 2023-04-01

【中文标题】Java Play 中的配置 - ebean 和 postgresql

【英文标题】：Configuration in Java Play - ebean and postgresql

【发布时间】：2017-04-09 18:59:32

【问题描述】：

我无法让我的 Play Framework 项目正常运行。我想使用 postgresql db 和 ebean，但配置有问题，我不断收到编译错误。你能看看并检查可能是什么原因吗？

我的 build.sbt 文件：

import play.sbt.PlayJava

name := """play-java-intro"""

version := "1.0-SNAPSHOT"

lazy val root = (project in file(".")).enablePlugins(PlayJava)

scalaVersion := "2.11.7"

libraryDependencies ++= Seq(
  "org.postgresql" % "postgresql" % "9.4-1206-jdbc42",
  "javax.persistence" % "persistence-api" % "1.0.2"
)

fork in run := true

plugins.sbt：

// The Play plugin
addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.5.13")

// Web plugins
addSbtPlugin("com.typesafe.sbt" % "sbt-coffeescript" % "1.0.0")
addSbtPlugin("com.typesafe.sbt" % "sbt-less" % "1.1.0")
addSbtPlugin("com.typesafe.sbt" % "sbt-jshint" % "1.0.4")
addSbtPlugin("com.typesafe.sbt" % "sbt-rjs" % "1.0.8")
addSbtPlugin("com.typesafe.sbt" % "sbt-digest" % "1.1.1")
addSbtPlugin("com.typesafe.sbt" % "sbt-mocha" % "1.1.0")
addSbtPlugin("org.irundaia.sbt" % "sbt-sassify" % "1.4.6")
addSbtPlugin("com.typesafe.sbt" % "sbt-play-ebean" % "3.0.0")
addSbtPlugin("com.typesafe.sbt" % "sbt-play-enhancer" % "1.1.0")

我的模型课：

package models;
import java.util.*;
import com.avaje.ebean.Finder;
import com.avaje.ebean.Model;
import play.data.format.*;
import play.data.validation.*;

import javax.persistence.Entity;
import javax.persistence.Id;

@Entity
public class Person extends Model 

    @Id
    private Long id;

    @Constraints.Required
    public String name;
    @Constraints.Required
    public String surname;

    @Formats.DateTime(pattern="dd/MM/yyyy")
    public Date date;

    public static Finder<Long,Person> finder = new Finder<Long, Person>(Person.class);

还有错误信息：

[error] com.avaje.ebean.Finder
[error] /home/guras/play-java-intro/app/models/Person.java:6: package com.avaje.ebean does not exist
[error] /home/guras/play-java-intro/app/models/Person.java:7: package com.avaje.ebean does not exist
[error] com.avaje.ebean.Model
[error] /home/guras/play-java-intro/app/models/Person.java:15: cannot find symbol
[error]   symbol: class Model
[error] Model
[error] /home/guras/play-java-intro/app/models/Person.java:28: cannot find symbol
[error]   symbol:   class Finder
[error]   location: class models.Person
[error] Finder
[error] /home/guras/play-java-intro/app/models/Person.java:28: cannot find symbol
[error]   symbol:   class Finder
[error]   location: class models.Person
[error] Finder


[info] play.forkrun.protocol.Serializers$playExceptionPickler$$anon$1: Compilation error[package com.avaje.ebean does not exist]
[info]  at play.forkrun.protocol.Serializers$playExceptionPickler$.unpickle(Serializers.scala:159)
[info]  at play.forkrun.protocol.Serializers$PlayRunsupportReloaderCompileFailureUnpickler$macro$56$2$.unpickle(Serializers.scala:175)
[info]  at play.forkrun.protocol.Serializers$PlayRunsupportReloaderCompileResultUnpickler$macro$66$2$.unpickle(Serializers.scala:181)
[info]  at scala.pickling.Unpickler$class.unpickleEntry(Pickler.scala:79)
[info]  at play.forkrun.protocol.Serializers$PlayRunsupportReloaderCompileResultUnpickler$macro$66$2$.unpickleEntry(Serializers.scala:181)
[info]  at scala.pickling.functions$.unpickle(functions.scala:11)
[info]  at sbt.serialization.JsonValue$$anonfun$parse$1.apply(SerializedValue.scala:104)
[info]  at scala.util.Try$.apply(Try.scala:192)
[info]  at sbt.serialization.JsonValue.parse(SerializedValue.scala:104)
[info]  at sbt.protocol.BuildValue.value(Values.scala:11)

【参考方案1】：

您必须将 ebean jar 作为依赖项添加到您的类路径中。导入失败是因为您的类路径中没有包含这些包的依赖 jar。 您可以在 Maven 中心存储库 here 中找到这些 jars

【讨论】：

现在我在 plugins.sbt 和 "org.avaje" 中有 "addSbtPlugin("com.typesafe.sbt" % "sbt-play-ebean" % "2.8.1")" % "ebean" % "2.8.1" 在 build.sbt 中，但 Intellij 无法解决它。你还有别的想法吗？好像根本没有下载那些库。

【参考方案2】：

关于你的 plugins.sbt

addSbtPlugin("com.typesafe.sbt" % "sbt-play-ebean" % "3.1.0")

在你的 build.sbt lazy val root = (project in file(".")).enablePlugins(PlayJava, PlayEbean)

libraryDependencies ++= Seq(
  javaJdbc,
  javaCore,
  "org.postgresql" % "postgresql" % "9.4.1212"
)

您必须启用 ebean 插件才能使用 play 框架。