JPypeを使用してPythonでJavaを呼び出す方法の共有例

startJVM(jvm, *args)

 -agentlib:libname[=options] 
 -classpath classpath 
 -verbose 
 -Xint

from jpype import * 
import os.path 
startJVM("C:/Java/jdk1.6.0_10/jre/bin/client/jvm.dll", "-ea") 
java.lang.System.out.println("hello World") 
shutdownJVM()

package jpype; 
 
public class JpypeDemo { 
public String sayHello(String user){ 
return "hello" + user; 
} 
public int calc(int a, int b){ 
return a + b;  
} 
}

from jpype import * 
import os.path 
jarpath = os.path.join(os.path.abspath('.'), 'F:/sample_Py/') 
startJVM("C:/Java/jdk1.6.0_10/jre/bin/client/jvm.dll","-ea", "-Djava.class.path=%s" % (jarpath + 'jpypedemo.jar')) 
#ubuntu 中startJVM("/home/geek/Android/jdk1.6.0_43/jre/lib/i386/server/libjvm.so","-ea", "-Djava.class.path=%s" % (jarpath + 'XXX.jar')) 
JDClass = JClass("jpype.JpypeDemo") 
jd = JDClass() 
#jd = JPackage("jpype").JpypeDemo() #两种创建jd的方法 
jprint = java.lang.System.out.println 
jprint(jd.sayHello("waw")) 
jprint(jd.calc(2,4)) 
shutdownJVM()

import jpype 
 jvmPath = jpype.getDefaultJVMPath() 
 jvmArg = “ -DyourProperty=yourValue ”
 if not jpype.isJVMStarted(): 
  jpype.startJVM(jvmPath，jvmArg)

import jpype 
 prop = “ yourProperty ”
 value = “ yourValue ”
 system = jpype.JClass('java.lang.System') 
 system.setProperty(str(prop),str(value))

import jpype 
 prop = “ yourProperty ”
 system = jpype.JClass('java.lang.System') 
 value = system.getProperty(str(prop))