如何从SWT应用程序运行SWT应用程序？

Question

我有两个SWT应用程序。在app 1中，我调用app2：

Runtime.getRuntime().exec("App2.bat");

App2已运行，但在获取显示时，它会抛出异常：

java.lang.UnsatisfiedLinkError: Could not load SWT library. Reasons: 
    no swt-win32-3740 in java.library.path
    no swt-win32 in java.library.path
    C:\Documents and Settings\Tran Dinh Thoai\.swt\lib\win32\x86\swt-win32-3740.dll: The referenced assembly is not installed on your system
    Can't load library: C:\Documents and Settings\Tran Dinh Thoai\.swt\lib\win32\x86\swt-win32.dll

    at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source)
    at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source)
    at org.eclipse.swt.internal.C.<clinit>(Unknown Source)
    at org.eclipse.swt.widgets.Display.<clinit>(Unknown Source)
    at com.escapenotes.updater.Checker.run(Checker.java:58)
    at com.escapenotes.updater.Runner.main(Runner.java:20)

当我从命令行调用app2 (运行App2.bat)时，它运行得很好，但在从app1运行时抛出异常。如何从app1运行app2？

这是App2.bat的内容：

  @echo off
  set JH=C:\Program Files\Java\jre6
  set CP=C:\Data\Projects\EscapeNotes\extensions\Updater\bin
  set XNP="%CP%";"%CP%\commons-logging-1.1.1.jar";"%CP%\aws-java-sdk-1.0.007.jar";"%CP%\commons-codec-1.4.jar";"%CP%\commons-httpclient-3.0.1.jar";"%CP%\jsoup-1.6.2.jar";"%CP%\log4j-1.2.8.jar";"%CP%\text.jar";"%CP%\jface.jar";"%CP%\jfacetext.jar";"%CP%\osgi.jar";"%CP%\runtime.jar";"%CP%\swt.jar"
  "%JH%\bin\java.exe" -cp %XNP% com.escapenotes.updater.Runner %1

当我添加-Djava.library.path时

@echo off
set JH=C:\Program Files\Java\jre6
set CP=C:\Data\Projects\EscapeNotes\extensions\Updater\bin
set XNP="%CP%";"%CP%\commons-logging-1.1.1.jar";"%CP%\aws-java-sdk-1.0.007.jar";"%CP%\commons-codec-1.4.jar";"%CP%\commons-httpclient-3.0.1.jar";"%CP%\jsoup-1.6.2.jar";"%CP%\log4j-1.2.8.jar";"%CP%\text.jar";"%CP%\jface.jar";"%CP%\jfacetext.jar";"%CP%\osgi.jar";"%CP%\runtime.jar";"%CP%\swt.jar"
"%JH%\bin\java.exe" -Djava.library.path="C:\Data\Projects\EscapeNotes\extensions\Updater\bin" -cp %XNP% com.escapenotes.updater.Runner %1

虽然有C:\Data\Projects\EscapeNotes\extensions\Updater\bin\swt-win32-3740.dll，，但我得到了异常：

java.lang.UnsatisfiedLinkError: Could not load SWT library. Reasons: 
    C:\Data\Projects\EscapeNotes\extensions\Updater\bin\swt-win32-3740.dll: The referenced assembly is not installed on your system
    no swt-win32 in java.library.path
    C:\Documents and Settings\Tran Dinh Thoai\.swt\lib\win32\x86\swt-win32-3740.dll: The referenced assembly is not installed on your system
    Can't load library: C:\Documents and Settings\Tran Dinh Thoai\.swt\lib\win32\x86\swt-win32.dll

    at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source)
    at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source)
    at org.eclipse.swt.internal.C.<clinit>(Unknown Source)
    at org.eclipse.swt.widgets.Display.<clinit>(Unknown Source)
    at com.escapenotes.updater.Checker.run(Checker.java:58)
    at com.escapenotes.updater.Runner.main(Runner.java:20)

Answer 1

从异常情况看，swt-win32库不是由java.library.path环境变量定义的。在你的"App2.bat“中，请通过-D选项提供它，如下所示：

java -Djava.library.path=[path to your library]

Answer 2

请看一下SWT源代码的代码片段项目中的SnippetLauncher。它演示了如何以编程方式启动代码片段。

https://git.eclipse.org/c/platform/eclipse.platform.swt.git/tree/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/SnippetLauncher.java

顺便说一句，上面的方法可以跨平台工作。我已经在Linux和Windows上使用过它。

可以尝试的另一件事是复制已终止代码片段的运行配置。在调试视图中，查看终止运行的属性，它显示了用于运行代码段的命令。(我在Gtk上这样做，不确定它在Windows上是否工作得很好)。

如果这为你解决了问题，或者如果你有其他问题，请告诉我。