我正在努力学习“Beginning Hibernate 3.5”,但遇到了最初的障碍。
当我运行 ant exportDDL
时,出现以下错误:
exportDDL:
[htools] Executing Hibernate Tool with a Hibernate Annotation/EJB3 Configuration
[htools] 1. task: hbm2ddl (Generates database schema)
[htools] SLF4J: The requested version 1.6 by your slf4j binding is not compatible with [1.5.5, 1.5.6, 1.5.7, 1.5.8]
[htools] SLF4J: See http://www.slf4j.org/codes.html#version_mismatch for further details.
[htools] An exception occurred while running exporter #2:hbm2ddl (Generates database schema)
[htools] To get the full stack trace run ant with -verbose
[htools] Problems in creating a AnnotationConfiguration. Have you remembered to add it to the classpath ?
[htools] java.lang.NoSuchMethodError: org.slf4j.helpers.MessageFormatter.format(Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;)Lorg/slf4j/helpers/FormattingTuple;
BUILD FAILED
C:\hibernate\project\build.xml:30: Problems in creating a AnnotationConfiguration. Have you
remembered to add it to the classpath ?
使用以下 Ant 任务:
<target name="exportDDL" depends="compile">
<mkdir dir="${sql}"/>
<htools destdir="${sql}">
<classpath refid="classpath.tools"/>
<annotationconfiguration
configurationfile="${src}/hibernate.cfg.xml"/>
<hbm2ddl drop="true" outputfilename="sample.sql"/>
</htools>
</target>
<target name="compile">
<javac srcdir="${src}" destdir="${bin}" classpathref="classpath.base"/>
</target>
这是怎么回事? ant compile
工作正常,但 exportDDL
任务没有。 sl4j jar 在类路径中,我下载了 slf4j-simple-1.6.1.jar
。想法?
最佳答案
这里解决你想要的
Mixing mixing different versions of slf4j artifacts can cause problems. For example, if you are using slf4j-api-1.6.1.jar, then you should also use slf4j-simple-1.6.1.jar, using slf4j-simple-1.5.5.jar will not work.
In general, you should make sure that the slf4j-api version matches that of the slf4j binding.
At initialization time, if SLF4J suspects that there may be a version mismatch problem, it will emit a warning about the suspected mismatch. For the exact details of the version mismatch detection mechanism, please refer to the relevant entry in the FAQ.
关于java - 开始 Hibernate 3.5 - Ant 任务的问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/3773379/