这是我开发的一个定制解决方案来查找包的所有类：
public class ClassFinder {
private static final char PKG_SEPARATOR = '.';
private static final char DIR_SEPARATOR = '/';
private static final String CLASS_FILE_SUFFIX = ".class";
private static final String BAD_PACKAGE_ERROR = "Unable to get resources from path '%s'. Are you sure the package '%s' exists?";
public static List> find(String scannedPackage) {
String scannedPath = scannedPackage.replace(PKG_SEPARATOR,DIR_SEPARATOR);
URL scannedUrl = Thread.currentThread().getContextClassLoader().getResource(scannedPath);
if (scannedUrl == null) {
throw new IllegalArgumentException(String.format(BAD_PACKAGE_ERROR,scannedPath,scannedPackage));
}
File scannedDir = new File(scannedUrl.getFile());
List> classes = new ArrayList>();
for (File file : scannedDir.listFiles()) {
classes.addAll(find(file,scannedPackage));
}
return classes;
}
private static List> find(File file,String scannedPackage) {
List> classes = new ArrayList>();
String resource = scannedPackage + PKG_SEPARATOR + file.getName();
if (file.isDirectory()) {
for (File child : file.listFiles()) {
classes.addAll(find(child,resource));
}
} else if (resource.endsWith(CLASS_FILE_SUFFIX)) {
int endIndex = resource.length() - CLASS_FILE_SUFFIX.length();
String className = resource.substring(0,endIndex);
try {
classes.add(Class.forName(className));
} catch (ClassNotFoundException ignore) {
}
}
return classes;
}
}
然后,只需使用：
List> classes = ClassFinder.find("com.package");
@H_301_7@
@H_301_7@
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