在我的项目中,我需要在运行时配置 java.library.path。Java给了我这样的能力吗?
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1 回答
0
第一个选项是将 java.library.path 设置为不同的值
/**
* Sets the java library path to the specified path
*
* @param path the new library path
* @throws Exception
*/
public static void setLibraryPath(String path) throws Exception {
System.setProperty("java.library.path", path);
//set sys_paths to null
final Field sysPathsField = ClassLoader.class.getDeclaredField("sys_paths");
sysPathsField.setAccessible(true);
sysPathsField.set(null, null);
}
第二个选项是将您的路径附加到 java.library.path
/**
* Adds the specified path to the java library path
*
* @param pathToAdd the path to add
* @throws Exception
*/
public static void addLibraryPath(String pathToAdd) throws Exception{
final Field usrPathsField = ClassLoader.class.getDeclaredField("usr_paths");
usrPathsField.setAccessible(true);
//get array of paths
final String[] paths = (String[])usrPathsField.get(null);
//check if the path to add is already present
for(String path : paths) {
if(path.equals(pathToAdd)) {
return;
}
}
//add the new path
final String[] newPaths = Arrays.copyOf(paths, paths.length + 1);
newPaths[newPaths.length-1] = pathToAdd;
usrPathsField.set(null, newPaths);
}
于 2014-05-23T08:26:01.103 回答