java matlab 混合编程 Failed to find the required library mclmcrrt9_2.dll on java.library.path.

这个错误是由于Java无法在其library path中找到mclmcrrt9_2.dll库文件引起的。mclmcrrt9_2.dll是Matlab的运行时库，因此需要在Java程序中添加该库的路径。

首先，确保您已正确安装Matlab，并且已安装了Matlab Compiler Runtime（MCR）。然后，您需要将MCR库文件的路径添加到Java程序的library path中。这可以通过在Java程序中设置系统属性来完成。您可以通过以下代码来设置library path：

System.setProperty("java.library.path", "path/to/mclmcrrt9_2.dll");

请确保将"path/to/mclmcrrt9_2.dll"替换为实际的dll文件路径。您还需要在代码中添加以下代码，以确保Java正确加载library path：

Field fieldSysPath = ClassLoader.class.getDeclaredField("sys_paths");
fieldSysPath.setAccessible(true);
fieldSysPath.set(null, null);

添加这些代码后，您应该能够成功运行Java和Matlab混合编程的应用程序了。

相关问题

Failed to find the required library mclmcrrt9_4.dll on java.library.path.

这个问题可能是因为 MATLAB Compiler Runtime (MCR) 没有正确地安装或配置。请确保您已经安装了正确版本的 MCR，并将其路径添加到 java.library.path 系统变量中。您可以通过搜索计算机以查找 mclmcrrt*.dll 文件来确定是否已安装 MCR。如果仍然无法解决问题，请尝试重新安装 MCR 并确保正确配置其路径。

Handler dispatch failed; nested exception is java.lang.UnsatisfiedLinkError: Failed to find the required library mclmcrrt9_4.dll on java.library.path. This library is typically installed along with MATLAB or the MATLAB Runtime. Its absence may indicate an issue with that installation or the current path configuration, or a mismatch with the architecture of the Java interpreter on the path. MATLAB Runtime version this component is attempting to use: 9.4. Java interpreter architecture: win64.

This error message indicates that the Java interpreter is unable to find the mclmcrrt9_4.dll library, which is required by MATLAB or the MATLAB Runtime.

To resolve this issue, you can try the following steps:

1. Check that MATLAB or the MATLAB Runtime is installed on your system. If it is not installed, you will need to install it to use the library.

2. Check that the path to the directory containing the mclmcrrt9_4.dll library is included in your java.library.path system variable. You can check this by opening a terminal or command prompt and running the following command:

   echo %java.library.path%

If the path to the directory containing the library is not included in the output, you will need to add it to the java.library.path variable. You can do this by adding the following line to your system environment variables:

   java.library.path=<path to directory containing mclmcrrt9_4.dll>

3. Check that the Java interpreter architecture matches the architecture of the mclmcrrt9_4.dll library. In this case, the error message indicates that the Java interpreter architecture is win64. You will need to ensure that the mclmcrrt9_4.dll library is also the 64-bit version that matches the architecture of the Java interpreter.