java create jar file
新建可执行jar文件 1.Main.java
public class Main {
public static void main(String[] args) throws Exception {
String a = "aaaaaaa";
System.out.println(a);
}
}
2.manifest.txt
Main-Class: Main
注意，manifest.txt最后要以空行结尾，且Main-Class:之后要有一个空格，不然就会报错如下：
java.io.IOException: invalid header field
3.编译生成Main.class文件
javac Main.java
生成Main.class文件，目录此时如下：
Main.java
Main.class
manifest.txt
4.生成Main.jar文件
jar -cvfm Main.jar manifest.txt Main.class
5.修改Main.jar文件执行权限
sudo chmod u+x Main.jar
6.执行jar文件
./Main.jar
# output: aaaaaaa
参考： [0].http://www.skylit.com/javamethods/faqs/javaindos.html [1].http://www.mkyong.com/java/how-to-make-an-executable-jar-file/ [2].https://docs.oracle.com/javase/tutorial/deployment/jar/build.html [3].https://docs.oracle.com/javase/tutorial/deployment/jar/appman.html
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