java -jar命令运行jar包时指定外部依赖jar包 linxux or windows教程

1.生成jar包：sh hello.jar jar.sh

<pre class="brush:java;gutter:true;">[chenquan@hostuser tartest]$ cat jar.sh 

jar -cvf0m ${1} ./META-INF/MANIFEST.MF .
[chenquan@hostuser tartest]$ ls META-INF/
MANIFEST.MF
[chenquan@hostuser tartest]$ ls test/
SignNatureTest.class
[chenquan@hostuser tartest]$ cat META-INF/MANIFEST.MF 
Manifest-Version: 1.0
Main-Class: test.SignNatureTest

[chenquan@hostuser tartest]

2.运行jar 实现jar外部依赖：

准备将上一步生成jar包移动到 外部依赖的jar libs目录内或者 与lib同层级目录都可以，

<pre class="brush:java;gutter:true;">java -jar -Djava.ext.dirs=./libs   ${i}

<pre class="brush:java;gutter:true;">如果在libs内 ，命令-Djava.ext.dirs=参数为./ ,如果生成jar与libs同级那么改为./libs 意思就是告诉jar 我的依赖jar包相对于我要执行的jar包的位置在哪里

<pre class="brush:java;gutter:true;">[chenquan@hostuser tests]$ ll
total 12
-rw-rw-r--. 1 chenquan chenquan 3188 Aug  4 12:06 foo.jar
-rw-rw-r--. 1 chenquan chenquan 3254 Aug  4 12:23 hello.jar
drwxr-xr-x. 4 chenquan chenquan  135 Aug  4 12:14 libs
-rwxrwxrwx. 1 chenquan chenquan  104 Aug  4 12:36 start.sh
[chenquan@hostuser tests]$ ls libs/
commons-codec-1.12.jar  commons-lang3-3.9.jar  setup.sh  SignNatureTest.java  tartest  test
[chenquan@hostuser tests]$ cat start.sh 
#!/bin/bash
for i in "$@"
do
 java -jar -Djava.ext.dirs=./libs ${i}
 echo "excuting ${i} res is:"
done

[chenquan@hostuser tests]$ 

执行结果,这里我比较懒写的sh文件不用每次敲一遍执行命令：

[chenquan@hostuser tests]$ sh start.sh hello.jar foo.jar
&k1=values1&k2=33
MD5string is: 832c599beef71cce2ca7e3953b4dc5fb2019-08-04 12:50:20excuting hello.jar res is:
&k1=values1&k2=33
MD5string is: 832c599beef71cce2ca7e3953b4dc5fb2019-08-04 12:50:21excuting foo.jar res is:
[chenquan@hostuser tests]$