MANIFEST.MF的应用以及如何读取jar包外的log4j.properties

本文详细介绍了MANIFEST.MF在jar文件中的作用,并提供了实例演示如何通过MANIFEST.MF实现jar文件中配置的统一管理,避免使用fatjar导致的程序臃肿,便于实施和部署。

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MANIFEST.MF是jar文件的配置文件,在用eclipse或jar命令生成jar包,都会在jar文件里生成这个文件,默认的MANIFEST.MF对我们来说没有什么意义,需要手工的修改一下,简单的例子如下:

Manifest-Version: 1.0
Main-Class: com.XMLTools
Class-Path: lib/dom4j-1.6.1.jar
lib/jaxen-1.1-beta-7.jar
lib/log4j-1.2.14.jar
lib/sitemesh-2.2.1.jar

一定要注意回车和空格。在这里我们指定该jar文件的main函数以及引入的第三方jar包。

这里大家可以看到我们引入了log4j-1.2.14.jar,很显然我们需要一个log4j.properties,那么我们要如何加载这个文件呢?可以在main方法里添加这样一行:

PropertyConfigurator.configure(System.getProperty("user.dir") + "/conf/log4j.properties");

这样我们只要把log4j.properties放到conf目录下就行了。



这种方式很方便我们在jar包或配置文件较多的时候进行统一的管理。避免用fatjar造成程序的臃肿,不利于实施和部署。



不多说了直接上代码,里面还包含一个生成MANIFEST.MF文件方法
sbt:spark-app> assembly [warn] multiple main classes detected: run 'show discoveredMainClasses' to see the list [error] 37 error(s) were encountered during the merge: [error] stack trace is suppressed; run last assembly for the full output [error] (assembly) [error] Deduplicate found different file contents in the following: [error] Jar name = protobuf-java-3.19.6.jar, jar org = com.google.protobuf, entry target = google/protobuf/api.proto [error] Jar name = spark-core_2.12-3.5.0.jar, jar org = org.apache.spark, entry target = google/protobuf/api.proto [error] Deduplicate found different file contents in the following: [error] Jar name = protobuf-java-3.19.6.jar, jar org = com.google.protobuf, entry target = google/protobuf/field_mask.proto [error] Jar name = spark-core_2.12-3.5.0.jar, jar org = org.apache.spark, entry target = google/protobuf/field_mask.proto [error] Deduplicate found different file contents in the following: [error] Jar name = commons-logging-1.1.3.jar, jar org = commons-logging, entry target = org/apache/commons/logging/Log.class [error] Jar name = jcl-over-slf4j-2.0.7.jar, jar org = org.slf4j, entry target = org/apache/commons/logging/Log.class [error] Deduplicate found different file contents in the following: [error] Jar name = protobuf-java-3.19.6.jar, jar org = com.google.protobuf, entry target = google/protobuf/struct.proto [error] Jar name = spark-core_2.12-3.5.0.jar, jar org = org.apache.spark, entry target = google/protobuf/struct.proto [error] Deduplicate found different file contents in the following: [error] Jar name = commons-logging-1.1.3.jar, jar org = commons-logging, entry target = org/apache/commons/logging/impl/NoOpLog.class [error] Jar name = jcl-over-slf4j-2.0.7.jar, jar org = org.slf4j, entry target = org/apache/commons/logging/impl/NoOpLog.class [error] Deduplicate found different file contents in the following: [error] Jar name = arrow-format-11.0.0.jar, jar org = org.apache.arrow, entry target = arrow-git.properties [error] Jar name = arrow-memory-core-11.0.0.jar, jar org = org.apache.arrow, entry target = arrow-git.properties [error] Jar name = arrow-memory-netty-11.0.0.jar, jar org = org.apache.arrow, entry target = arrow-git.properties [error] Jar name = arrow-vector-11.0.0.jar, jar org = org.apache.arrow, entry target = arrow-git.properties [error] Deduplicate found different file contents in the following: [error] Jar name = javax.inject-1.jar, jar org = javax.inject, entry target = javax/inject/Singleton.class [error] Jar name = jakarta.inject-2.6.1.jar, jar org = org.glassfish.hk2.external, entry target = javax/inject/Singleton.class [error] Deduplicate found different file contents in the following: [error] Jar name = protobuf-java-3.19.6.jar, jar org = com.google.protobuf, entry target = google/protobuf/duration.proto [error] Jar name = spark-core_2.12-3.5.0.jar, jar org = org.apache.spark, entry target = google/protobuf/duration.proto [error] Deduplicate found different file contents in the following: [error] Jar name = javax.inject-1.jar, jar org = javax.inject, entry target = javax/inject/Named.class [error] Jar name = jakarta.inject-2.6.1.jar, jar org = org.glassfish.hk2.external, entry target = javax/inject/Named.class [error] Deduplicate found different file contents in the following: [error] Jar name = javax.inject-1.jar, jar org = javax.inject, entry target = javax/inject/Inject.class [error] Jar name = jakarta.inject-2.6.1.jar, jar org = org.glassfish.hk2.external, entry target = javax/inject/Inject.class [error] Deduplicate found different file contents in the following: [error] Jar name = commons-logging-1.1.3.jar, jar org = commons-logging, entry target = org/apache/commons/logging/LogFactory.class [error] Jar name = jcl-over-slf4j-2.0.7.jar, jar org = org.slf4j, entry target = org/apache/commons/logging/LogFactory.class [error] Deduplicate found different file contents in the following: [error] Jar name = commons-logging-1.1.3.jar, jar org = commons-logging, entry target = org/apache/commons/logging/LogConfigurationException.class [error] Jar name = jcl-over-slf4j-2.0.7.jar, jar org = org.slf4j, entry target = org/apache/commons/logging/LogConfigurationException.class [error] Deduplicate found different file contents in the following: [error] Jar name = jakarta.annotation-api-1.3.5.jar, jar org = jakarta.annotation, entry target = javax/annotation/security/DenyAll.class [error] Jar name = jsr250-api-1.0.jar, jar org = javax.annotation, entry target = javax/annotation/security/DenyAll.class [error] Deduplicate found different file contents in the following: [error] Jar name = protobuf-java-3.19.6.jar, jar org = com.google.protobuf, entry target = google/protobuf/timestamp.proto [error] Jar name = spark-core_2.12-3.5.0.jar, jar org = org.apache.spark, entry target = google/protobuf/timestamp.proto [error] Deduplicate found different file contents in the following: [error] Jar name = jakarta.annotation-api-1.3.5.jar, jar org = jakarta.annotation, entry target = javax/annotation/Generated.class [error] Jar name = jsr250-api-1.0.jar, jar org = javax.annotation, entry target = javax/annotation/Generated.class [error] Deduplicate found different file contents in the following: [error] Jar name = protobuf-java-3.19.6.jar, jar org = com.google.protobuf, entry target = google/protobuf/source_context.proto [error] Jar name = spark-core_2.12-3.5.0.jar, jar org = org.apache.spark, entry target = google/protobuf/source_context.proto [error] Deduplicate found different file contents in the following: [error] Jar name = protobuf-java-3.19.6.jar, jar org = com.google.protobuf, entry target = google/protobuf/empty.proto [error] Jar name = spark-core_2.12-3.5.0.jar, jar org = org.apache.spark, entry target = google/protobuf/empty.proto [error] Deduplicate found different file contents in the following: [error] Jar name = jakarta.annotation-api-1.3.5.jar, jar org = jakarta.annotation, entry target = javax/annotation/Resource.class [error] Jar name = jsr250-api-1.0.jar, jar org = javax.annotation, entry target = javax/annotation/Resource.class [error] Deduplicate found different file contents in the following: [error] Jar name = jakarta.annotation-api-1.3.5.jar, jar org = jakarta.annotation, entry target = javax/annotation/security/RolesAllowed.class [error] Jar name = jsr250-api-1.0.jar, jar org = javax.annotation, entry target = javax/annotation/security/RolesAllowed.class [error] Deduplicate found different file contents in the following: [error] Jar name = jakarta.annotation-api-1.3.5.jar, jar org = jakarta.annotation, entry target = javax/annotation/PreDestroy.class [error] Jar name = jsr250-api-1.0.jar, jar org = javax.annotation, entry target = javax/annotation/PreDestroy.class [error] Deduplicate found different file contents in the following: [error] Jar name = protobuf-java-3.19.6.jar, jar org = com.google.protobuf, entry target = google/protobuf/descriptor.proto [error] Jar name = spark-core_2.12-3.5.0.jar, jar org = org.apache.spark, entry target = google/protobuf/descriptor.proto [error] Deduplicate found different file contents in the following: [error] Jar name = commons-logging-1.1.3.jar, jar org = commons-logging, entry target = org/apache/commons/logging/impl/SimpleLog.class [error] Jar name = jcl-over-slf4j-2.0.7.jar, jar org = org.slf4j, entry target = org/apache/commons/logging/impl/SimpleLog.class [error] Deduplicate found different file contents in the following: [error] Jar name = jakarta.annotation-api-1.3.5.jar, jar org = jakarta.annotation, entry target = javax/annotation/security/DeclareRoles.class [error] Jar name = jsr250-api-1.0.jar, jar org = javax.annotation, entry target = javax/annotation/security/DeclareRoles.class [error] Deduplicate found different file contents in the following: [error] Jar name = protobuf-java-3.19.6.jar, jar org = com.google.protobuf, entry target = google/protobuf/wrappers.proto [error] Jar name = spark-core_2.12-3.5.0.jar, jar org = org.apache.spark, entry target = google/protobuf/wrappers.proto [error] Deduplicate found different file contents in the following: [error] Jar name = javax.inject-1.jar, jar org = javax.inject, entry target = javax/inject/Qualifier.class [error] Jar name = jakarta.inject-2.6.1.jar, jar org = org.glassfish.hk2.external, entry target = javax/inject/Qualifier.class [error] Deduplicate found different file contents in the following: [error] Jar name = jakarta.annotation-api-1.3.5.jar, jar org = jakarta.annotation, entry target = javax/annotation/security/PermitAll.class [error] Jar name = jsr250-api-1.0.jar, jar org = javax.annotation, entry target = javax/annotation/security/PermitAll.class [error] Deduplicate found different file contents in the following: [error] Jar name = protobuf-java-3.19.6.jar, jar org = com.google.protobuf, entry target = google/protobuf/any.proto [error] Jar name = spark-core_2.12-3.5.0.jar, jar org = org.apache.spark, entry target = google/protobuf/any.proto [error] Deduplicate found different file contents in the following: [error] Jar name = jakarta.annotation-api-1.3.5.jar, jar org = jakarta.annotation, entry target = javax/annotation/Resources.class [error] Jar name = jsr250-api-1.0.jar, jar org = javax.annotation, entry target = javax/annotation/Resources.class [error] Deduplicate found different file contents in the following: [error] Jar name = jakarta.annotation-api-1.3.5.jar, jar org = jakarta.annotation, entry target = javax/annotation/Resource$AuthenticationType.class [error] Jar name = jsr250-api-1.0.jar, jar org = javax.annotation, entry target = javax/annotation/Resource$AuthenticationType.class [error] Deduplicate found different file contents in the following: [error] Jar name = jackson-core-2.15.2.jar, jar org = com.fasterxml.jackson.core, entry target = META-INF/versions/9/module-info.class [error] Jar name = jackson-databind-2.15.2.jar, jar org = com.fasterxml.jackson.core, entry target = META-INF/versions/9/module-info.class [error] Jar name = jackson-datatype-jsr310-2.13.4.jar, jar org = com.fasterxml.jackson.datatype, entry target = META-INF/versions/9/module-info.class [error] Jar name = gson-2.10.1.jar, jar org = com.google.code.gson, entry target = META-INF/versions/9/module-info.class [error] Jar name = log4j-api-2.20.0.jar, jar org = org.apache.logging.log4j, entry target = META-INF/versions/9/module-info.class [error] Jar name = parquet-jackson-1.12.3.jar, jar org = org.apache.parquet, entry target = META-INF/versions/9/module-info.class [error] Jar name = jcl-over-slf4j-2.0.7.jar, jar org = org.slf4j, entry target = META-INF/versions/9/module-info.class [error] Jar name = slf4j-api-2.0.7.jar, jar org = org.slf4j, entry target = META-INF/versions/9/module-info.class [error] Jar name = xz-1.9.jar, jar org = org.tukaani, entry target = META-INF/versions/9/module-info.class [error] Deduplicate found different file contents in the following: [error] Jar name = protobuf-java-3.19.6.jar, jar org = com.google.protobuf, entry target = google/protobuf/type.proto [error] Jar name = spark-core_2.12-3.5.0.jar, jar org = org.apache.spark, entry target = google/protobuf/type.proto [error] Deduplicate found different file contents in the following: [error] Jar name = jakarta.annotation-api-1.3.5.jar, jar org = jakarta.annotation, entry target = javax/annotation/PostConstruct.class [error] Jar name = jsr250-api-1.0.jar, jar org = javax.annotation, entry target = javax/annotation/PostConstruct.class [error] Deduplicate found different file contents in the following: [error] Jar name = netty-all-4.1.96.Final.jar, jar org = io.netty, entry target = META-INF/io.netty.versions.properties [error] Jar name = netty-buffer-4.1.96.Final.jar, jar org = io.netty, entry target = META-INF/io.netty.versions.properties [error] Jar name = netty-codec-http2-4.1.96.Final.jar, jar org = io.netty, entry target = META-INF/io.netty.versions.properties [error] Jar name = netty-codec-http-4.1.96.Final.jar, jar org = io.netty, entry target = META-INF/io.netty.versions.properties [error] Jar name = netty-codec-socks-4.1.96.Final.jar, jar org = io.netty, entry target = META-INF/io.netty.versions.properties [error] Jar name = netty-codec-4.1.96.Final.jar, jar org = io.netty, entry target = META-INF/io.netty.versions.properties [error] Jar name = netty-common-4.1.96.Final.jar, jar org = io.netty, entry target = META-INF/io.netty.versions.properties [error] Jar name = netty-handler-proxy-4.1.96.Final.jar, jar org = io.netty, entry target = META-INF/io.netty.versions.properties [error] Jar name = netty-handler-4.1.96.Final.jar, jar org = io.netty, entry target = META-INF/io.netty.versions.properties [error] Jar name = netty-resolver-4.1.96.Final.jar, jar org = io.netty, entry target = META-INF/io.netty.versions.properties [error] Jar name = netty-transport-classes-epoll-4.1.96.Final.jar, jar org = io.netty, entry target = META-INF/io.netty.versions.properties [error] Jar name = netty-transport-classes-kqueue-4.1.96.Final.jar, jar org = io.netty, entry target = META-INF/io.netty.versions.properties [error] Jar name = netty-transport-native-epoll-4.1.96.Final.jar, jar org = io.netty, entry target = META-INF/io.netty.versions.properties [error] Jar name = netty-transport-native-epoll-4.1.96.Final.jar, jar org = io.netty, entry target = META-INF/io.netty.versions.properties [error] Jar name = netty-transport-native-epoll-4.1.96.Final.jar, jar org = io.netty, entry target = META-INF/io.netty.versions.properties [error] Jar name = netty-transport-native-kqueue-4.1.96.Final.jar, jar org = io.netty, entry target = META-INF/io.netty.versions.properties [error] Jar name = netty-transport-native-kqueue-4.1.96.Final.jar, jar org = io.netty, entry target = META-INF/io.netty.versions.properties [error] Jar name = netty-transport-native-unix-common-4.1.96.Final.jar, jar org = io.netty, entry target = META-INF/io.netty.versions.properties [error] Jar name = netty-transport-4.1.96.Final.jar, jar org = io.netty, entry target = META-INF/io.netty.versions.properties [error] Deduplicate found different file contents in the following: [error] Jar name = javax.inject-1.jar, jar org = javax.inject, entry target = javax/inject/Scope.class [error] Jar name = jakarta.inject-2.6.1.jar, jar org = org.glassfish.hk2.external, entry target = javax/inject/Scope.class [error] Deduplicate found different file contents in the following: [error] Jar name = log4j-1.2-api-2.20.0.jar, jar org = org.apache.logging.log4j, entry target = META-INF/org/apache/logging/log4j/core/config/plugins/Log4j2Plugins.dat [error] Jar name = log4j-core-2.20.0.jar, jar org = org.apache.logging.log4j, entry target = META-INF/org/apache/logging/log4j/core/config/plugins/Log4j2Plugins.dat [error] Deduplicate found different file contents in the following: [error] Jar name = javax.inject-1.jar, jar org = javax.inject, entry target = javax/inject/Provider.class [error] Jar name = jakarta.inject-2.6.1.jar, jar org = org.glassfish.hk2.external, entry target = javax/inject/Provider.class [error] Deduplicate found different file contents in the following: [error] Jar name = jakarta.annotation-api-1.3.5.jar, jar org = jakarta.annotation, entry target = javax/annotation/security/RunAs.class [error] Jar name = jsr250-api-1.0.jar, jar org = javax.annotation, entry target = javax/annotation/security/RunAs.class [error] Total time: 5 s, completed 2025年7月12日 下午12:56:20 [error] server failed to start on local:sbt-server-8814d8f5c3747ce114fe. java.io.IOException: Could not create lock for \\.\pipe\sbt-server-8814d8f5c3747ce114fe_lock, error 5 sbt:spark-app>
最新发布
07-13
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