为什么 Maven 报告“校验和验证失败，存储库中没有可用的校验和”？

我正在尝试使用此处描述的 3 个步骤创建自定义 Maven 存储库 -http://www.javaworld.com/community/node/3968 http://www.javaworld.com/community/node/3968。因此，我遵循了所有步骤，这里有存储库：

D:\maven2>dir /s/b
D:\maven2\com
D:\maven2\org
D:\maven2\web.config
D:\maven2\com\safenet
D:\maven2\com\safenet\hasp
D:\maven2\com\safenet\hasp\1
D:\maven2\com\safenet\hasp\maven-metadata.xml
D:\maven2\com\safenet\hasp\maven-metadata.xml.md5
D:\maven2\com\safenet\hasp\maven-metadata.xml.sha1
D:\maven2\com\safenet\hasp\1\hasp-1.jar
D:\maven2\com\safenet\hasp\1\hasp-1.pom
D:\maven2\com\safenet\hasp\1\_maven.repositories
D:\maven2\org\jnetpcap
D:\maven2\org\jnetpcap\jnetcap
D:\maven2\org\jnetpcap\jnetcap\1.3
D:\maven2\org\jnetpcap\jnetcap\maven-metadata.xml
D:\maven2\org\jnetpcap\jnetcap\maven-metadata.xml.md5
D:\maven2\org\jnetpcap\jnetcap\maven-metadata.xml.sha1
D:\maven2\org\jnetpcap\jnetcap\1.3\jnetcap-1.3.jar
D:\maven2\org\jnetpcap\jnetcap\1.3\jnetcap-1.3.pom
D:\maven2\org\jnetpcap\jnetcap\1.3\_maven.repositories

D:\maven2>type com\safenet\hasp\maven-metadata.xml
<?xml version="1.0" encoding="UTF-8"?>
<metadata>
  <groupId>com.safenet</groupId>
  <artifactId>hasp</artifactId>
  <versioning>
    <release>1</release>
    <versions>
      <version>1</version>
    </versions>
    <lastUpdated>20130108125547</lastUpdated>
  </versioning>
</metadata>

D:\maven2>type org\jnetpcap\jnetcap\maven-metadata.xml.md5
297455697088aad6bdbe256d48fb0676 *maven-metadata.xml

D:\maven2>type org\jnetpcap\jnetcap\maven-metadata.xml.sha1
f86d93727a76525f42f1b67997020e1a9a41b948 *maven-metadata.xml

D:\maven2>type org\jnetpcap\jnetcap\1.3\jnetcap-1.3.pom
<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <modelVersion>4.0.0</modelVersion>
  <groupId>org.jnetpcap</groupId>
  <artifactId>jnetcap</artifactId>
  <version>1.3</version>
  <description>POM was created from install:install-file</description>
</project>

D:\maven2>

现在我尝试在 pom 文件中使用 hasp 工件，如下所示：

<dependency>
  <groupId>com.safenet</groupId>
  <artifactId>hasp</artifactId>
  <version>1</version>
  <scope>provided</scope>
</dependency>

存储库的引用如下：

<repository>
  <releases>
    <enabled>true</enabled>
    <updatePolicy>always</updatePolicy>
    <checksumPolicy>fail</checksumPolicy>
  </releases>
  <id>dev-builder</id>
  <name>Shunra private repository</name>
  <url>http://dev-builder/maven2</url>
  <layout>default</layout>
</repository>

不幸的是，它没有按预期工作：

[INFO] Building license 0.0.1
[INFO] ------------------------------------------------------------------------
Downloading: http://dev-builder/maven2/com/safenet/hasp/1/hasp-1.pom
[WARNING] The POM for com.safenet:hasp:jar:1 is missing, no dependency information available
Downloading: http://dev-builder/maven2/com/safenet/hasp/1/hasp-1.jar
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] Local Driver Proxy ................................ SUCCESS [2.579s]
[INFO] Emulation API ..................................... SUCCESS [1.637s]
[INFO] util.logging ...................................... SUCCESS [1.023s]
[INFO] Infra ............................................. SUCCESS [0.250s]
[INFO] dtos .............................................. SUCCESS [0.691s]
[INFO] commons ........................................... SUCCESS [0.426s]
[INFO] license ........................................... FAILURE [2.195s]
[INFO] core .............................................. SKIPPED
[INFO] vcat .............................................. SKIPPED
[INFO] VCat-build ........................................ SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 9.044s
[INFO] Finished at: Tue Jan 15 21:27:43 EST 2013
[INFO] Final Memory: 6M/15M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project license: Could not resolve dependencies for project com.shunra:license:jar:0.0.1: Could not transfer artifact com.safenet:hasp:jar:1 from/to dev-builder (http
://dev-builder/maven2): Checksum validation failed, no checksums available from the repository -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/DependencyResolutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <goals> -rf :license
c:\dev\shunra\Application\Builder\build\vcat>

我不知道它有什么问题。 md5 和 sha1 文件是使用 md5sum 和 sha1sum 实用程序的 cygwin 端口创建的。尽管如此，Maven 仍报告错误的校验和。

我来这里寻找同样的答案。经过几个小时的尝试后，我终于发现发生这种情况的原因有两个：

1. md5sum 和 shasum 创建的校验和并不完全是 Maven 正在寻找的
2. 您需要所有文件的校验和。

所以基本上 javaworld.com 上的教程是完全错误的，或者至少是部分错误的。

那么答案是什么呢：

1. Use the -DcreateChecksum=true你的参数mvn install:install-file命令。
2. 重命名maven-metadata-local生成的文件用于删除local part.

我决定经常这样做，我会创建一个 bash 脚本来自动化该过程，也许您也会发现它很有用。

我设计了下面的脚本来在临时目录中运行整个过程，然后压缩结果，然后您可以将其上传到自定义存储库。

#! /bin/bash

USAGE(){
    println "Usage: `basename $0` -g GroupId -a ArtifactId  -f file [-voh] args\n\n";

    println "Options:";
    println "   h   Print usage";
    println "   v   Version (Defaults to 1.0)";
    println "   o   Output zip file name (Defaults to GroupId.ArtifactId.zip)";


}
println(){

    echo "$1";
}


VERSION="1.0";

# Parse command line options.
while getopts hv:o:g:a:f: OPT; do
    case "$OPT" in
        h)
            USAGE
            exit 0
            ;;
        v)
          VERSION=$OPTARG;
            ;;
    g)
          GROUP_ID=$OPTARG;
            ;;
    a)
          ARTIFACT_ID=$OPTARG;
            ;;
    f)
            INPUT_FILE=$OPTARG
            ;;
        o)
            OUTPUT_FILE=$OPTARG
            ;;
        \?)
            # getopts issues an error message
        echo "Error: " >&2;
            USAGE
            exit 1
            ;;
    esac
done

if [ -z "${OUTPUT_FILE}" ]; then
    OUTPUT_FILE="$GROUP_ID.$ARTIFACT_ID.zip";
fi



# Remove the switches we parsed above.
shift `expr $OPTIND - 1`

if [ -z "${ARTIFACT_ID}" ]; then
    echo "Error: You must specify an artifact id."
fi

if [ -z "${GROUP_ID}" ]; then
    echo "Error: You must specify an group id."
fi

if [ -z "${INPUT_FILE}" ]; then
    echo "Error: You must specify an group id."
fi

if [ ! -f "${INPUT_FILE}" ];
then
     echo "Error: Input file '$INPUT_FILE' does not exist."
fi

# Create a temp directory which we will use as our 'local repository'
TEMPDIR=$(mktemp -dt "build-maven-dep.XXXXXXX")

TEMPDIR_SUB="$GROUP_ID.$ARTIFACT_ID";
TEMP_REPO_LOC="$TEMPDIR/$TEMPDIR_SUB";
mkdir -p $TEMP_REPO_LOC;

mvn install:install-file -DlocalRepositoryPath=$TEMP_REPO_LOC -DgroupId=$GROUP_ID -DartifactId=$ARTIFACT_ID -Dversion=$VERSION -Dfile=$INPUT_FILE -Dpackaging=jar -DgeneratePom=true -DcreateChecksum=true

CUR_DIR=$(pwd);

# Enter the temp repository we created which is now populated.
cd $TEMP_REPO_LOC;

PACKAGE_STRUC="$GROUP_ID.$ARTIFACT_ID";

# Dive down into directory structure until we get to the *.xml files.
IFS='. ' read -ra ADDR <<< $PACKAGE_STRUC
for i in "${ADDR[@]}"; do
   println "Moving into: $i";
   cd $i;
   println "Now  in $(pwd)";
done

# Rename the files to what maven expects.
mv maven-metadata-local.xml maven-metadata.xml
mv maven-metadata-local.xml.md5 maven-metadata.xml.md5 
mv maven-metadata-local.xml.sha1 maven-metadata.xml.sha1

# Zip up our results.
cd $TEMP_REPO_LOC;
cd ..;
zip -r $OUTPUT_FILE $TEMPDIR_SUB
mv $OUTPUT_FILE $CUR_DIR

# Return back to our original directory and remove the temp directory
cd $CUR_DIR;
rm -Rf $TEMPDIR;

# EOF

假设您想为自定义存储库打包 myjar.jar：

./bundle-for-remote.sh -g com.mygroup -a myJar -f myJar.jar

这将在当前目录中创建一个名为 com.mygroup.myJar.zip 的 .zip 文件，其中包含所有组件。

Cheers,

Casey