JAVA命令(1): javac,java及参数

/**1、没有包结构（默认包）

===============================================================================

public class HelloWorldV1 {
	public static void main(String[] args) {
		System.out.println("hello world v1 .....");
	}
}

D:\work\javacmd>javac HelloWorldV1.java

D:\work\javacmd>java HelloWorldV1

hello world v1 .....

D:\work>java HelloWorldV1

Exception in thread "main" java.lang.NoClassDefFoundError: HelloWorldV1

D:\work>java -cp D:\work\javacmd\ HelloWorldV1

hello world v1 .....

D:\work\javacmd>javac -verbose HelloWorldV1.java

[解析开始时间 HelloWorldV1.java]

[解析已完成时间 11ms]

[源文件的搜索路径： .,C:\Program Files\Java\jdk1.6.0_39\lib,C:\Program Files\Jav

a\jdk1.6.0_39\lib\tools.jar]

[类文件的搜索路径： C:\Program Files\Java\jdk1.6.0_39\jre\lib\resources.jar,rt.jar,jsse.jar...tools.jar]

[正在装入 java\lang\Object.class(java\lang:Object.class)]

[正在装入 java\lang\String.class(java\lang:String.class)]

[正在检查 HelloWorldV1]

[正在装入 java\lang\System.class(java\lang:System.class)]

[正在装入 java\io\PrintStream.class(java\io:PrintStream.class)]

[正在装入 java\io\FilterOutputStream.class(java\io:FilterOutputStream.class)]

[正在装入 java\io\OutputStream.class(java\io:OutputStream.class)]

[已写入 HelloWorldV1.class]

[总时间 191ms]

win7下使用powershell,类似cmd，但可以使用shell命令

PS D:\work\javacmd> java -verbose HelloWorldV1 > r.txt

[Opened C:\Program Files\Java\jdk1.6.0_39\jre\lib\rt.jar]

[Loaded java.lang.Object from C:\Program Files\Java\jdk1.6.0_39\jre\lib\rt.jar]

[Loaded java.io.Serializable from C:\Program Files\Java\jdk1.6.0_39\jre\lib\rt.jar]

[Loaded java.lang.Comparable from C:\Program Files\Java\jdk1.6.0_39\jre\lib\rt.jar]

[Loaded java.lang.CharSequence from C:\Program Files\Java\jdk1.6.0_39\jre\lib\rt.jar]

[Loaded java.lang.String from C:\Program Files\Java\jdk1.6.0_39\jre\lib\rt.jar]

[Loaded java.lang.reflect.GenericDeclaration from C:\Program Files\Java\jdk1.6.0_39\jre\lib\rt.jar]

[Loaded java.lang.reflect.Type from C:\Program Files\Java\jdk1.6.0_39\jre\lib\rt.jar]

[Loaded java.lang.reflect.AnnotatedElement from C:\Program Files\Java\jdk1.6.0_39\jre\lib\rt.jar]

[Loaded java.lang.Class from C:\Program Files\Java\jdk1.6.0_39\jre\lib\rt.jar]

[Loaded java.lang.Cloneable from C:\Program Files\Java\jdk1.6.0_39\jre\lib\rt.jar]

[Loaded java.lang.ClassLoader from C:\Program Files\Java\jdk1.6.0_39\jre\lib\rt.jar]

[Loaded java.lang.ref.Reference,java.lang.reflect.*

...

[Opened C:\Program Files\Java\jdk1.6.0_39\jre\lib\charsets.jar]

...

[Loaded java.security.Principal from C:\Program Files\Java\jdk1.6.0_39\jre\lib\rt.jar]

[Loaded HelloWorldV1 from file:/D:/work/javacmd/]

hello world v1 .....

[Loaded java.lang.Shutdown from C:\Program Files\Java\jdk1.6.0_39\jre\lib\rt.jar]

[Loaded java.lang.Shutdown$Lock from C:\Program Files\Java\jdk1.6.0_39\jre\lib\rt.jar]

加载300+类

-classpath: 简写cp

-verbose: 冗长输出。它包括了每个所加载的类和每个所编译的源文件的有关信息。

-g: 生成所有的调试信息{包括vars-局部变量,缺省:{source-源文件,lines-行号}}

-g:none

-d: 设置生成的class文件的目录

PS D:\work\javacmd> javac -verbose -d ./bin HelloWorldV1.java

-sourcepath: 指定源文件路径，默认取classpath

PS D:\work> javac -verbose -d ./javacmd/bin -sourcepath javacmd javacmd/HelloWorldV1.java

PS D:\work> javac -verbose -d d:/work/javacmd/bin -sourcepath d:/work/javacmd javacmd/HelloWorldV1.java

/** 2、多个class文件。

===============================================================================

package study.timeriver;

public class ConsoleV3 {
	public static void print(String str) {
		System.out.println("Console.print: "+str);
	}
	public static void main(String[] args) {
		System.out.println("I am ConsoleV3.....");
	}
}

package study.timeriver;

public class StringUtilV3 {
	public static void print(String str) {
		ConsoleV3.print("StringUtil.print: "+str);
	}
	public static void main(String[] args) {
		System.out.println("I am StringUtilV3.....");
	}
}

package study.timeriver;

public class HelloWorldV3 {
	public static void main(String[] args) throws Exception {
		StringUtilV3.print("hello world .....");
		Thread.sleep(1000000);
	}
}

逐个编译class文件（3个文件：会自动编译关联的。但是不能运行。）

PS D:\work\javacmd> javac -d ./classes ./src/study/timeriver/ConsoleV3.java

PS D:\work\javacmd> java -cp ./classes study.timeriver.ConsoleV3

I am ConsoleV3.....

PS D:\work\javacmd> javac -cp ./classes -d ./classes ./src/study/timeriver/StringUtilV3.java

PS D:\work\javacmd> java -cp ./classes study.timeriver.StringUtilV3

I am StringUtilV3.....

PS D:\work\javacmd> javac -cp ./classes -d ./classes ./src/study/timeriver/HelloWorldV3.java

PS D:\work\javacmd> java -cp ./classes study.timeriver.HelloWorldV3

Console.print: StringUtil.print: hello world .....

打包根目录下面的文件：

jar cvf helloworldv3.jar ConsoleV3.class HelloWorldV3.class StringUtilV3.class

jar打包与直接压缩的区别：多了一个文件: META-INF/MANIFEST.MF

Manifest-Version: 1.0

Created-By: 1.6.0_39 (Sun Microsystems Inc.)

打包指定目录（无效）

PS D:\work\javacmd> jar cvf helloworldv3.jar .\classes

执行jar包

PS D:\work\javacmd> java -jar .\helloworldv3.jar

Failed to load Main-Class manifest attribute from .\helloworldv3.jar

打包指定目录

PS D:\work\javacmd\classes> jar cvf helloworldv3.jar .\study

标明清单(manifest)

增加：study/(读入= 0) (写出= 0)(存储了 0%)

增加：study/timeriver/(读入= 0) (写出= 0)(存储了 0%)

增加：study/timeriver/ConsoleV3.class(读入= 689) (写出= 404)(压缩了 41%)

增加：study/timeriver/HelloWorldV3.class(读入= 393) (写出= 270)(压缩了 31%)

增加：study/timeriver/StringUtilV3.class(读入= 739) (写出= 429)(压缩了 41%)

修改META-INF/MANIFEST.MF

Manifest-Version: 1.0

Created-By: 1.6.0_39 (Sun Microsystems Inc.)

Main-Class: study.timeriver.HelloWorldV3

PS D:\work\javacmd\classes> java -jar .\helloworldv3.jar

Console.print: StringUtil.print: hello world .....

/** 3、自定义bat批处理文件

===============================================================================

使用bat启动：timeriver.bat

D:\work\javacmd\classes>timeriver.bat

D:\work\javacmd\classes>echo exceute jar....

exceute jar....

D:\work\javacmd\classes>start "tt" "C:\Program Files\Java\jdk1.6.0_39\bin\java"

-classpath "helloworldv3.jar" study.timeriver.HelloWorldV3

/** 4、tomcat的bat批处理文件

===============================================================================

tomcat的catalina.bat

%_EXECJAVA% %JAVA_OPTS% %CATALINA_OPTS% %DEBUG_OPTS% -Djava.endorsed.dirs="%JAVA_ENDORSED_DIRS%" -classpath "%CLASSPATH%" -Dcatalina.base="%CATALINA_BASE%" -Dcatalina.home="%CATALINA_HOME%" -Djava.io.tmpdir="%CATALINA_TMPDIR%" %MAINCLASS% %CMD_LINE_ARGS% %ACTION%

使用

echo _EXECJAVA.......................

echo %_EXECJAVA%

pause

goto end

输出变量。替换

start "hh" "C:\Program Files\Java\jdk1.6.0_39\bin\java" -Djava.util.logging.config.file="D:\tomcat\conf\logging.properties" -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs="D:\tomcat\endorsed" -classpath "C:\Program Files\Java\jdk1.6.0_39\lib\tools.jar;D:\tomcat\bin\bootstrap.jar" -Dcatalina.base="D:\tomcat" -Dcatalina.home="D:\tomcat" -Djava.io.tmpdir="D:\tomcat\temp" org.apache.catalina.startup.Bootstrap

/** 5、-D参数，args参数

===============================================================================

public class Test {
	public static void main(String[] args) {
		//eclipse中：args在Program arguments,-D在VM arguments
		if(args.length >= 2){
			System.out.println(args[0]);
			System.out.println(args[1]);
		}
		System.out.println("args......");
		System.out.println("-DmyConf="+System.getProperty("myConf"));;
	}
}

D:\work\javacmd>java -DmyConf="conf/myConf.xml" Test wnj,ok good well

wnj,ok

good

args......

-DmyConf=conf/myConf.xml

JAVA命令(1): javac,java及参数

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