AS3-获取JAVA主路径
我需要在Java Home lib目录上复制一个扩展。 但我的问题是在Windows和Mac OS上找到java主页。 此目录在每次idk更新时都会更改。 你能帮我用环境变量修复它吗。 致以最良好的祝愿 您能用AS3-获取JAVA主路径,java,actionscript-3,apache-flex,Java,Actionscript 3,Apache Flex,我需要在Java Home lib目录上复制一个扩展。 但我的问题是在Windows和Mac OS上找到java主页。 此目录在每次idk更新时都会更改。 你能帮我用环境变量修复它吗。 致以最良好的祝愿 您能用环境变量来帮助修复它吗 您能否确保您的应用程序用户已将实际添加到其帐户的环境设置中?如果他们没有遵循一些教程,那么你的想法将一无所获 但我的问题是在Windows和Mac OS上查找JAVA\u HOME 您可以使用终端命令查找JAVA\u HOME Mac OS:(:未测试,因为没有可用
环境变量来帮助修复它吗
您能否确保您的应用程序用户已将实际添加到其帐户的环境设置中?如果他们没有遵循一些教程,那么你的想法将一无所获
但我的问题是在Windows和Mac OS上查找JAVA\u HOME
您可以使用终端命令查找JAVA\u HOME
Mac OS:(:未测试,因为没有可用的Mac)
Windows OS:(使用cmd.exe
命令行)
选项1:通常set
会将新条目添加到环境变量中,但如果不使用参数,则只会列出现有的环境变量
set
这给了我长文本的结果,包括:
JAVA_HOME=C:\Program Files\Java\jre1.8.0_102
JDK_HOME=C:\Program Files\Java\jdk1.8.0_102
JRE_HOME=C:\Program Files\Java\jre1.8.0_102\jre
选项2:(获取系统当前Java.exe
path)
这给了我一个结果:C:\ProgramFiles\Java\jre1.8.0\u 102\bin\Java.exe
选项3:对于Windows,我认为最好的选择是检查Windows注册表中用户的currentVersion
,然后检查特定currentVersion的JavaHome
(a) 检查Windows使用的Java当前版本
REG QUERY HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\ /v "CurrentVersion" /s
注意:或者只需执行java-version
即可获得下一步(b)的正确编号
(b) 根据上面找到的版本(例如:1.8
或1.8.0_102)
在cmd.exe
窗口中练习上述选项,以轻松查看其输出
稍后,在AS3代码中,可以使用正则表达式
或字符串
函数提取所需的编号或目录路径
Options++:其他选项包括使用where/r c:\java.exe
来搜索c:\
驱动器中的文件位置(文件夹),但在大型驱动器上速度可能会慢一些(是一个基本选项,搜索所有子文件夹)
您询问了有关环境变量(而不是注册表)的问题,因此下面是一个针对Windows的快速示例
(注:如果在IDE中测试时遇到“不支持本机进程”的错误,请在AIR设置中仅勾选“扩展桌面”,然后对于导出的运行时版本,必须取消勾选该错误,现在仅勾选“桌面”)
Windows的可测试代码示例,它以静默方式打开CMD.exe并传递set
命令,然后接收返回的文本输出。代码可以由您缩短
package {
import flash.display.MovieClip;
import flash.events.*;
import flash.errors.*;
import flash.desktop.NativeProcess;
import flash.desktop.*;
import flash.filesystem.File;
import flash.utils.ByteArray;
public class Java_Get_Path_v3 extends MovieClip
{
private var NProcessExe:File;
private var NProcess :NativeProcess; //external Process (eg: notepad.exe)
private var nativeProcessStartupInfo :NativeProcessStartupInfo;
private var NProcess_Args :Vector.<String> = new Vector.<String>(); //Process startup options
private var str_CMD_Output :String = "";
private var str_Java_Home :String = "";
private var str_JDK_Home :String = "";
private var str_JRE_Home :String = "";
private var temp_Int :int = -1;
public function Java_Get_Path_v3()
{
//# 1) setup Native Process (Command Line runs in background (no window) )
createNativeProcess();
//# 2) get Java "Home" path from Windows via "Environment Variables";
get_Java_Path(); //is via stdout
}
private function createNativeProcess():void
{
if (NativeProcess.isSupported)
{
trace("## doing FUNCTION : createNativeProcess()" );
var pathToEXE:String = "c:/windows/system32/cmd.exe";
NProcessExe = File.applicationDirectory.resolvePath(pathToEXE);
if (NProcessExe.exists)
{
//# initialise Process
NProcess = new NativeProcess();
//# add Process listeners for events
NProcess.addEventListener(ProgressEvent.PROGRESS, STD_onOutputData);
NProcess.addEventListener(ProgressEvent.STANDARD_OUTPUT_DATA, STD_onOutputData);
NProcess.addEventListener(ProgressEvent.STANDARD_ERROR_DATA, STD_onErrorData);
NProcess.addEventListener(IOErrorEvent.STANDARD_OUTPUT_IO_ERROR, STD_onIOError);
NProcess.addEventListener(IOErrorEvent.STANDARD_ERROR_IO_ERROR, STD_onIOError);
}
else
{ trace("The specified .exe file was not found"); }
}
else //# if NOT suppoNativeProcess.
{
trace("Native Process not supported in this mode (use only \"Extended Desktop\" when debugging)");
}
}
private function get_Java_Path():void
{
//# use to get Java Home path
NProcess_Args[0] = ("\/c" + "set");
//# use to get Java version
//NProcess_Args[0] = ("\/c" + "java -version");
//# start the Native Process (eg: silent running of CMD.exe)
//# triggers :::: public function STD_onOutputData
nativeProcessStartupInfo = new NativeProcessStartupInfo();
nativeProcessStartupInfo.executable = NProcessExe;
nativeProcessStartupInfo.arguments = NProcess_Args;
NProcess.start(nativeProcessStartupInfo);
}
private function update_String_with_Path():void
{
trace("## doing FUNCTION : update_String_with_Path()" );
//trace("str_CMD_Output : " + str_CMD_Output);
temp_Int = str_CMD_Output.indexOf("JAVA_HOME"); //trace("temp_Int :" + temp_Int);
str_Java_Home = str_CMD_Output.substring( temp_Int, (str_CMD_Output.indexOf("\n", temp_Int ) ) );
temp_Int = str_CMD_Output.indexOf("JDK_HOME"); //trace("temp_Int :" + temp_Int);
str_JDK_Home = str_CMD_Output.substring( temp_Int, (str_CMD_Output.indexOf("\n", temp_Int ) ) );
temp_Int = str_CMD_Output.indexOf("JRE_HOME"); //trace("temp_Int :" + temp_Int)
str_JRE_Home = str_CMD_Output.substring( temp_Int, (str_CMD_Output.indexOf("\n", temp_Int ) ) );
trace("==================================");
trace("str_Java_Home : " + str_Java_Home);
trace("str_JDK_Home : " + str_JDK_Home);
trace("str_JRE_Home : " + str_JRE_Home);
}
public function STD_onOutputData(event:ProgressEvent):void
{
trace("## doing FUNCTION : STD_onOutputData( ... )" );
if (NProcess && NProcess.running)
{
if (NProcess.standardOutput.bytesAvailable > 0)
{
trace("got bytes in... STD OUT : ");
//# Receive CMD.exe output (UTF bytes) into String...
str_CMD_Output = NProcess.standardOutput.readUTFBytes(NProcess.standardOutput.bytesAvailable);
trace("str_CMD_Output.length : " + str_CMD_Output.length + " characters");
trace("## end of... STD_Out ::: ");
update_String_with_Path();
}
}
}
public function STD_onErrorData(event:ProgressEvent):void
{
trace("## doing FUNCTION : STD_onErrorData( ... )" );
if (NProcess.running == true)
{
//# sometimes Native Process output is in std-Error instead of std-Output
//# (is decided by the running .EXE file)
trace("## end of... STD_Error ::: ");
}
}
public function STD_onIOError(event:IOErrorEvent):void
{ trace(event.toString()); }
private function STD_errorHandler(e:AsyncErrorEvent):void
{ trace('ERROR: ' + e.text); }
} //end Class
} //end Package
包{
导入flash.display.MovieClip;
导入flash.events.*;
导入flash.errors.*;
导入flash.desktop.NativeProcess;
导入flash.desktop.*;
导入flash.filesystem.File;
导入flash.utils.ByteArray;
公共类Java_Get_Path_v3扩展了MovieClip
{
private-var-NProcessExe:File;
private var NProcess:NativeProcess;//外部进程(例如:notepad.exe)
私有变量nativeProcessStartupInfo:nativeProcessStartupInfo;
私有变量NProcess_Args:Vector.=新向量。;//进程启动选项
私有变量str_CMD_输出:String=“”;
私有变量str_Java_Home:String=“”;
私有变量str_JDK_Home:String=“”;
私有变量str_JRE_Home:String=“”;
私有变量temp_Int:Int=-1;
公共函数Java_Get_Path_v3()
{
//#1)设置本机进程(命令行在后台运行(无窗口))
createNativeProcess();
//#2)通过“环境变量”从Windows获取Java“主”路径;
get_Java_Path();//通过标准输出
}
私有函数createNativeProcess():void
{
if(NativeProcess.isSupported)
{
跟踪(##doing函数:createNativeProcess());
var pathToEXE:String=“c:/windows/system32/cmd.exe”;
NProcessExe=File.applicationDirectory.resolvePath(pathToEXE);
如果(nprocessex.exists)
{
//#初始化过程
NProcess=新的本机进程();
//#为事件添加进程侦听器
n进程添加事件列表器(ProgressEvent.PROGRESS,标准输出数据);
n进程添加事件列表器(ProgressEvent.STANDARD输出数据、STD输出数据);
n进程添加事件列表器(ProgressEvent.STANDARD\u ERROR\u数据、STD\u onErrorData);
n进程添加事件列表器(IOErrorEvent.STANDARD_OUTPUT_IO_ERROR,STD_ERROR);
n进程添加事件列表器(IOErrorEvent.STANDARD_ERROR_IO_ERROR,STD_ERROR);
}
其他的
{trace(“未找到指定的.exe文件”);}
}
else/#如果不支持此过程。
{
跟踪(“本机进程在此模式下不受支持(调试时仅使用“扩展桌面”);
}
}
私有函数get_Java_Path():void
{
//#用于获取Java主路径
n进程参数[0]=(“\/c”+“集”);
//#用于获取Java版本
//n进程参数[0]=(“\/c”+“java-version”);
//#启动本机进程(例如:静默运行CMD.exe)
//#触发器:::公共函数STD_onOutputData
nativeProcessStartupInfo=新的nativeProcessStartupInfo();
nativeProcessStartupInfo.executable=NProcessExe;
nativeProcessStartupInfo.arguments=n进程参数;
NPROSS.start(nativeProcessStartupInfo);
}
私有函数用路径()更新字符串:void
{
跟踪(##doing函数:用_Path()更新_字符串)
REG QUERY HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\ /v "CurrentVersion" /s
REG QUERY HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\ /v "JavaHome" /s
package {
import flash.display.MovieClip;
import flash.events.*;
import flash.errors.*;
import flash.desktop.NativeProcess;
import flash.desktop.*;
import flash.filesystem.File;
import flash.utils.ByteArray;
public class Java_Get_Path_v3 extends MovieClip
{
private var NProcessExe:File;
private var NProcess :NativeProcess; //external Process (eg: notepad.exe)
private var nativeProcessStartupInfo :NativeProcessStartupInfo;
private var NProcess_Args :Vector.<String> = new Vector.<String>(); //Process startup options
private var str_CMD_Output :String = "";
private var str_Java_Home :String = "";
private var str_JDK_Home :String = "";
private var str_JRE_Home :String = "";
private var temp_Int :int = -1;
public function Java_Get_Path_v3()
{
//# 1) setup Native Process (Command Line runs in background (no window) )
createNativeProcess();
//# 2) get Java "Home" path from Windows via "Environment Variables";
get_Java_Path(); //is via stdout
}
private function createNativeProcess():void
{
if (NativeProcess.isSupported)
{
trace("## doing FUNCTION : createNativeProcess()" );
var pathToEXE:String = "c:/windows/system32/cmd.exe";
NProcessExe = File.applicationDirectory.resolvePath(pathToEXE);
if (NProcessExe.exists)
{
//# initialise Process
NProcess = new NativeProcess();
//# add Process listeners for events
NProcess.addEventListener(ProgressEvent.PROGRESS, STD_onOutputData);
NProcess.addEventListener(ProgressEvent.STANDARD_OUTPUT_DATA, STD_onOutputData);
NProcess.addEventListener(ProgressEvent.STANDARD_ERROR_DATA, STD_onErrorData);
NProcess.addEventListener(IOErrorEvent.STANDARD_OUTPUT_IO_ERROR, STD_onIOError);
NProcess.addEventListener(IOErrorEvent.STANDARD_ERROR_IO_ERROR, STD_onIOError);
}
else
{ trace("The specified .exe file was not found"); }
}
else //# if NOT suppoNativeProcess.
{
trace("Native Process not supported in this mode (use only \"Extended Desktop\" when debugging)");
}
}
private function get_Java_Path():void
{
//# use to get Java Home path
NProcess_Args[0] = ("\/c" + "set");
//# use to get Java version
//NProcess_Args[0] = ("\/c" + "java -version");
//# start the Native Process (eg: silent running of CMD.exe)
//# triggers :::: public function STD_onOutputData
nativeProcessStartupInfo = new NativeProcessStartupInfo();
nativeProcessStartupInfo.executable = NProcessExe;
nativeProcessStartupInfo.arguments = NProcess_Args;
NProcess.start(nativeProcessStartupInfo);
}
private function update_String_with_Path():void
{
trace("## doing FUNCTION : update_String_with_Path()" );
//trace("str_CMD_Output : " + str_CMD_Output);
temp_Int = str_CMD_Output.indexOf("JAVA_HOME"); //trace("temp_Int :" + temp_Int);
str_Java_Home = str_CMD_Output.substring( temp_Int, (str_CMD_Output.indexOf("\n", temp_Int ) ) );
temp_Int = str_CMD_Output.indexOf("JDK_HOME"); //trace("temp_Int :" + temp_Int);
str_JDK_Home = str_CMD_Output.substring( temp_Int, (str_CMD_Output.indexOf("\n", temp_Int ) ) );
temp_Int = str_CMD_Output.indexOf("JRE_HOME"); //trace("temp_Int :" + temp_Int)
str_JRE_Home = str_CMD_Output.substring( temp_Int, (str_CMD_Output.indexOf("\n", temp_Int ) ) );
trace("==================================");
trace("str_Java_Home : " + str_Java_Home);
trace("str_JDK_Home : " + str_JDK_Home);
trace("str_JRE_Home : " + str_JRE_Home);
}
public function STD_onOutputData(event:ProgressEvent):void
{
trace("## doing FUNCTION : STD_onOutputData( ... )" );
if (NProcess && NProcess.running)
{
if (NProcess.standardOutput.bytesAvailable > 0)
{
trace("got bytes in... STD OUT : ");
//# Receive CMD.exe output (UTF bytes) into String...
str_CMD_Output = NProcess.standardOutput.readUTFBytes(NProcess.standardOutput.bytesAvailable);
trace("str_CMD_Output.length : " + str_CMD_Output.length + " characters");
trace("## end of... STD_Out ::: ");
update_String_with_Path();
}
}
}
public function STD_onErrorData(event:ProgressEvent):void
{
trace("## doing FUNCTION : STD_onErrorData( ... )" );
if (NProcess.running == true)
{
//# sometimes Native Process output is in std-Error instead of std-Output
//# (is decided by the running .EXE file)
trace("## end of... STD_Error ::: ");
}
}
public function STD_onIOError(event:IOErrorEvent):void
{ trace(event.toString()); }
private function STD_errorHandler(e:AsyncErrorEvent):void
{ trace('ERROR: ' + e.text); }
} //end Class
} //end Package