Playframework play-1.2.3的向后兼容性

从Play1.2.1升级到1.2.3时，我遇到一些编译错误。例如：

WsAsync.newRequest

现在接受两个参数而不是一个参数

Play 1.2.3有两个Play jar：Play.jar和Play-1.2.3.jar。Play.jar似乎有早期版本的

newRequest

，如果两个jar都添加到eclipse中的构建路径中，则不会出现编译错误。但是当我运行Play时，它似乎只使用Play-1.2.3.jar。我甚至试图将play.jar复制到应用程序库目录，但没有解决问题

有人能告诉我如何使用这两个play jar来获得向后兼容性吗

从

播放类路径

获取输出：

hh@ubuntu10:/disk2/dba/lib$ /disk2/play-1.2.3/play classpath --%test-hh
~        _            _ 
~  _ __ | | __ _ _  _| |
~ | '_ \| |/ _' | || |_|
~ |  __/|_|\____|\__ (_)
~ |_|            |__/   
~
~ play! 1.2.3, http://www.playframework.org
~ framework ID is test-hh
~
~ Computed classpath is:
~ 
['/disk2/dba/lib/conf', '/disk2/play-1.2.3/framework/play-1.2.3.jar', '/disk2/play-1.2.3/modules/testrunner/lib/play-testrunner.jar', '/disk2/play-1.2.3/framework/lib/hibernate-core-3.6.1.Final.jar', '/disk2/play-1.2.3/framework/lib/activation-1.1.1.jar', '/disk2/play-1.2.3/framework/lib/commons-beanutils-1.8.3.jar', '/disk2/play-1.2.3/framework/lib/javassist-3.9.0.GA.jar', '/disk2/play-1.2.3/framework/lib/jj-simplecaptcha.jar', '/disk2/play-1.2.3/framework/lib/javax.inject-1.0.jar', '/disk2/play-1.2.3/framework/lib/hibernate-jpa-2.0-api-1.0.0.Final.jar', '/disk2/play-1.2.3/framework/lib/commons-email-1.2.jar', '/disk2/play-1.2.3/framework/lib/groovy-all-1.7.7.jar', '/disk2/play-1.2.3/framework/lib/jj-wikitext.jar', '/disk2/play-1.2.3/framework/lib/log4j-1.2.15.jar', '/disk2/play-1.2.3/framework/lib/jj-textile.jar', '/disk2/play-1.2.3/framework/lib/dom4j-1.6.1.jar', '/disk2/play-1.2.3/framework/lib/ehcache-core-2.0.0.jar', '/disk2/play-1.2.3/framework/lib/ivy-2.2.0.jar', '/disk2/play-1.2.3/framework/lib/signpost-core-1.2.jar', '/disk2/play-1.2.3/framework/lib/commons-collections-3.2.1.jar', '/disk2/play-1.2.3/framework/lib/slf4j-log4j12-1.6.1.jar', '/disk2/play-1.2.3/framework/lib/jamon-2.7.jar', '/disk2/play-1.2.3/framework/lib/postgresql-9.0.jar', '/disk2/play-1.2.3/framework/lib/antlr-2.7.6.jar', '/disk2/play-1.2.3/framework/lib/asm-all-3.3.1.jar', '/disk2/play-1.2.3/framework/lib/mysql-connector-java-5.1.13.jar', '/disk2/play-1.2.3/framework/lib/jj-imaging.jar', '/disk2/play-1.2.3/framework/lib/xstream-1.3.jar', '/disk2/play-1.2.3/framework/lib/commons-logging-1.1.1.jar', '/disk2/play-1.2.3/framework/lib/joda-time-1.6.jar', '/disk2/play-1.2.3/framework/lib/snakeyaml-1.7.jar', '/disk2/play-1.2.3/framework/lib/commons-lang-2.6.jar', '/disk2/play-1.2.3/framework/lib/ezmorph-1.0.3.jar', '/disk2/play-1.2.3/framework/lib/cglib-nodep-2.2.jar', '/disk2/play-1.2.3/framework/lib/hibernate-commons-annotations-3.2.0.Final.jar', '/disk2/play-1.2.3/framework/lib/jta-1.1.jar', '/disk2/play-1.2.3/framework/lib/org.eclipse.jdt.core-3.6.0.jar', '/disk2/play-1.2.3/framework/lib/geronimo-servlet_2.5_spec-1.2.jar', '/disk2/play-1.2.3/framework/lib/jaxen-1.1.jar', '/disk2/play-1.2.3/framework/lib/junit-4.8.1.jar', '/disk2/play-1.2.3/framework/lib/oval-1.50.jar', '/disk2/play-1.2.3/framework/lib/jregex-1.2_01.jar', '/disk2/play-1.2.3/framework/lib/slf4j-api-1.6.1.jar', '/disk2/play-1.2.3/framework/lib/bcprov-jdk15-1.45.jar', '/disk2/play-1.2.3/framework/lib/commons-fileupload-1.2.2.jar', '/disk2/play-1.2.3/framework/lib/c3p0-0.9.1.2.jar', '/disk2/play-1.2.3/framework/lib/jsr107cache-1.0.jar', '/disk2/play-1.2.3/framework/lib/commons-io-2.0.1.jar', '/disk2/play-1.2.3/framework/lib/mail-1.4.3.jar', '/disk2/play-1.2.3/framework/lib/commons-javaflow-1066591.jar', '/disk2/play-1.2.3/framework/lib/hibernate-entitymanager-3.6.0.Final.jar', '/disk2/play-1.2.3/framework/lib/memcached-2.6.jar', '/disk2/play-1.2.3/framework/lib/commons-codec-1.4.jar', '/disk2/play-1.2.3/framework/lib/netty-3.2.4.Final.jar', '/disk2/play-1.2.3/framework/lib/h2-1.3.149.jar', '/disk2/play-1.2.3/framework/lib/gson-1.7.1.jar', '/disk2/play-1.2.3/framework/lib/async-http-client-1.6.3.jar']

---

我遇到了由play-1.2.3/framework目录下两个不同的play-jar文件引起的问题

我比较了play.jar和play-1.2.3.jar中的文件“play/version”。对于play.jar，版本文件内容为“1.1.2”，对于play-1.2.3.jar，版本文件内容为“1.2.3”。我的结论是play.jar是框架的一个旧版本，错误地包含在包中，所以我只需从play-1.2.3/framework目录中删除play.jar就解决了这个问题

对于特定的不兼容性问题，我建议您只需更改代码。WsAsync.newRequest已在播放1.2.2中更改为

public WSRequest newRequest(String url, String encoding)