java.library.path 用途

简介：

The Java Virtual Machine (JVM) uses the java.library.path property in order to locate native libraries. This property is part of the system environment used by Java, in order to locate and load native libraries used by an application.

When a Java application loads a native library using the System.loadLibrary() method, the java.library.path is scanned for the specified library. If the JVM is not able to detect the requested library, it throws an UnsatisfiedLinkError. Finally, the usage of native libraries makes a Java program more platform dependent, as it requires the existence of specific native libraries.

简而言之：jvm 使用 java.library.path 来加载 本地库(native libraries)，如 加载 dll 等

How to set the java.library.path property

There are several ways to set the java.library.path property:

• 使用命令行方式 : Using the terminal (Linux or Mac) or the command prompt (Windows), we can execute the following command, in order to execute our Java application:

java -Djava.library.path=<path_to_dll> <main_class>

where the path_to_dll argument must be replaced with the path of the required library.

• 使用java源码配置 : Inside an application’s code we can set thejava.library.path. using the following code snippet:

System.setProperty(“java.library.path”, “/path/to/library”);

• 通过 ide 配置: The java.library.path can be configured using an IDE, such as Eclipse or Netbeans.