Reprinted from : https://www.cnblogs.com/lixuwu/p/5855031.html
1 maven Local warehouse
maven In the local warehouse jar The directory is generally divided into three layers ： In the picture 1 2 3 They are as follows ：
4 jar Package dependency
If you want to maven In the local warehouse jar Package added to project , Open it directly 4 xx.pom file , Will change jar Dependent replication of packages pom.xml In the file .
2 Will local jar Package added to local warehouse
2.1 add to jar To local warehouse
In principle, Maven We don't need to do that in our design , because pom.xml Depending on jar The package will be automatically downloaded from the central warehouse to the local warehouse .
But there are also special cases .
For example, I downloaded
How to add jar To the local warehouse ？
1.cmd Command to enter the jar Package path
（ Shortcut key ：shift+ Right click Select here to open the command line window ）
ps:jar Packages can be in any folder Directory , Don't put it in the root of the partition , And don't create it yourself maven Related directories in .
There's no need to create a related directory ,mvn install After that, the related jar Put the bags in the local warehouse .
2. Carry out orders ：
mvn install:install-file -Dfile=lucene-queryparser-4.6.1.jar -DgroupId=org.apache.lucene -DartifactId=lucene-queryparser -Dversion=4.6.1 -Dpackaging=jar
among ：-DgroupId and -DartifactId The purpose of this is to specify this jar Wrapped in repository Installation path for , It's just used to tell the project to find the name in this path jar package .
Generally used jar The bags are all there mven Downloaded from the warehouse , therefore groupId and artifactId Directly copy maven The setting in the warehouse is OK .
<!-- https://mvnrepository.com/artifact/org.apache.lucene/lucene-queryparser -->
such as ：
mvn install:install-file -Dfile=hadoop-hdfs-2.2.0.jar -DgroupId=org.apache.hadoop -DartifactId=hadoop-hdfs -Dversion=2.2.0 -D -Dpackaging=jar
It means to put hadoop-hdfs-2.2.0.jar The installation to repository\org.apache.hadoop\hadoop-hdfs\2.2.0 Under the table of contents , After executing the order , If you need to use this in a project jar, It's in pom.xml Add the following configuration to ：
ps： After execution of the above order , In the jar In the directory where the package is located, a jar The name of the bag .pom The file of , There are descriptions in it jar Coordinate information of the package .
Tips ： The file directory is just an identifier jar The location of , You can also directly put jar Package replacement , You can use the previous coordinates , Import the replacement... In the project jar package . It's easier to do that , But it's not advocated .
Be careful , In the order , Each parameter is preceded by a -D identification .
2.2 add to lib In the catalog jar Package to local warehouse
How the pom.xml In the project libs Under the jar Well , Instead of adding from the local repository ？
1、 The first thing to add is jar The package is copied to libs Under the folder
2、 And then in pom.xml Add the following code to ：
Be careful libs This one in the folder jar The bag doesn't need Add to Build Path
（ This method has not been tried ）
Here is maven The address of the central warehouse ：
You can search here for what you want jar package , Then copy the dependency code to your project pom.xml in , Corresponding jar The package will be downloaded to your local maven Warehouse , To provide you with .
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