无法在 Play 框架中连接到 Postgresql DB答案

【问题标题】：Cannot connect to Postgresql DB in Play framework无法在 Play 框架中连接到 Postgresql DB
【发布时间】：2014-04-03 13:50:53
【问题描述】：

我正在尝试使用播放框架连接到 Postgresql。我尝试了一切，但我仍然无法解决这个问题

db.default.user=user
db.default.password=qwerty
db.default.url="jdbc:postgresql://localhost:5432/paperclips"
db.default.driver=org.postgresql.Driver

但我收到以下错误：无法连接到数据库 [默认]

[error] c.j.b.h.AbstractConnectionHook - Failed to obtain initial connection Sleeping for 0ms and trying again. Attempts left: 0. Exception: java.net.ConnectException: Connection refused.Message:Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
[error] application - 

! @6hmjgfh72 - Internal server error, for (GET) [/] ->

play.api.Configuration$$anon$1: Configuration error[Cannot connect to database [default]]
    at play.api.Configuration$.play$api$Configuration$$configError(Configuration.scala:92) ~[play_2.10.jar:2.2.2]
    at play.api.Configuration.reportError(Configuration.scala:570) ~[play_2.10.jar:2.2.2]
    at play.api.db.BoneCPPlugin$$anonfun$onStart$1.apply(DB.scala:252) ~[play-jdbc_2.10.jar:2.2.2]
    at play.api.db.BoneCPPlugin$$anonfun$onStart$1.apply(DB.scala:243) ~[play-jdbc_2.10.jar:2.2.2]
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244) ~[scala-library.jar:na]
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244) ~[scala-library.jar:na]
Caused by: org.postgresql.util.PSQLException: Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
    at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:136) ~[postgresql-9.1-901.jdbc4.jar:na]
    at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:66) ~[postgresql-9.1-901.jdbc4.jar:na]
    at org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:125) ~[postgresql-9.1-901.jdbc4.jar:na]
    at org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:30) ~[postgresql-9.1-901.jdbc4.jar:na]
    at org.postgresql.jdbc3g.AbstractJdbc3gConnection.<init>(AbstractJdbc3gConnection.java:22) ~[postgresql-9.1-901.jdbc4.jar:na]
    at org.postgresql.jdbc4.AbstractJdbc4Connection.<init>(AbstractJdbc4Connection.java:30) ~[postgresql-9.1-901.jdbc4.jar:na]
Caused by: java.net.ConnectException: Connection refused
    at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.6.0_65]
    at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:382) ~[na:1.6.0_65]
    at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:241) ~[na:1.6.0_65]
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:228) ~[na:1.6.0_65]
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:431) ~[na:1.6.0_65]
    at java.net.Socket.connect(Socket.java:527) ~[na:1.6.0_65]

【问题讨论】：

"Connection denied" 表示您的 Postgres serer 没有运行，或者在不同的端口上，或者防火墙阻止了连接
谢谢，我是新手。您如何将 Postgres 服务器设置为 localhost。我只是在关注 Manning 的书 Play for Scala？
PostgreSQL 是否在本地安装？什么操作系统/版本？
我现在通过本地安装PostgreSQL解决了

标签： postgresql playframework-2.0

【解决方案1】：

在application.conf文件中：

 db.default.driver=org.postgresql.Driver
 db.default.url="jdbc:postgresql://localhost:5432/dataBaseName"
 db.default.user=user
 db.default.password="password"

在您的主项目 (/) 中创建路径 /lib，并应添加 .jar 执行 postgresql。

下载here，然后重新加载项目。

或者然后在build.sbt中添加这段代码：

libraryDependencies ++= Seq(
 "org.postgresql" % "postgresql" % "9.2-1003-jdbc4",
  javaJdbc,
  javaEbean,
  cache,
  javaWs
)

【讨论】：