package com.github.ltsopensource.core.commons.utils;
import com.github.ltsopensource.core.exception.LtsRuntimeException;
import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.net.JarURLConnection;
import java.net.URL;
import java.net.URLDecoder;
import java.util.*;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.regex.Pattern;
public class ClassPathScanHandler {
/**
* 是否排除内部类 true->是 false->否
*/
private boolean excludeInner = true;
/**
* 过滤规则适用情况 true—>搜索符合规则的 false->排除符合规则的
*/
private boolean checkInOrEx = true;
/**
* 过滤规则列表 如果是null或者空，即全部符合不过滤
*/
private List<String> classFilters = null;
/**
* 无参构造器，默认是排除内部类、并搜索符合规则
*/
public ClassPathScanHandler() {
}
/**
* excludeInner:是否排除内部类 true->是 false->否<br>
* checkInOrEx：过滤规则适用情况 true—>搜索符合规则的 false->排除符合规则的<br>
* classFilters：自定义过滤规则，如果是null或者空，即全部符合不过滤
*/
public ClassPathScanHandler(Boolean excludeInner, Boolean checkInOrEx,
List<String> classFilters) {
this.excludeInner = excludeInner;
this.checkInOrEx = checkInOrEx;
this.classFilters = classFilters;
}
/**
* 扫描包
*
* @param basePackage 基础包
* @param recursive 是否递归搜索子包
* @return Set
*/
public Set<Class<?>> getPackageAllClasses(String basePackage,
boolean recursive) {
Set<Class<?>> classes = new LinkedHashSet<Class<?>>();
String packageName = basePackage;
if (packageName.endsWith(".")) {
packageName = packageName
.substring(0, packageName.lastIndexOf('.'));
}
String package2Path = packageName.replace('.', '/');
Enumeration<URL> dirs;
try {
dirs = Thread.currentThread().getContextClassLoader().getResources(
package2Path);
while (dirs.hasMoreElements()) {
URL url = dirs.nextElement();
String protocol = url.getProtocol();
if ("file".equals(protocol)) {
String filePath = URLDecoder.decode(url.getFile(), "UTF-8");
doScanPackageClassesByFile(classes, packageName, filePath, recursive);
} else if ("jar".equals(protocol)) {
doScanPackageClassesByJar(packageName, url, recursive, classes);
}
}
} catch (IOException e) {
throw new LtsRuntimeException(e);
}
return classes;
}
/**
* 以jar的方式扫描包下的所有Class文件<br>
*/
private void doScanPackageClassesByJar(String basePackage, URL url,
final boolean recursive, Set<Class<?>> classes) {
String package2Path = basePackage.replace('.', '/');
JarFile jar;
try {
jar = ((JarURLConnection) url.openConnection()).getJarFile();
Enumeration<JarEntry> entries = jar.entries();
while (entries.hasMoreElements()) {
JarEntry entry = entries.nextElement();
String name = entry.getName();
if (!name.startsWith(package2Path) || entry.isDirectory()) {
continue;
}
// 判断是否递归搜索子包
if (!recursive
&& name.lastIndexOf('/') != package2Path.length()) {
continue;
}
// 判断是否过滤 inner class
if (this.excludeInner && name.indexOf('$') != -1) {
continue;
}
String classSimpleName = name.substring(name.lastIndexOf('/') + 1);
// 判定是否符合过滤条件
if (this.filterClassName(classSimpleName)) {
String className = name.replace('/', '.');
className = className.substring(0, className.length() - 6);
try {
classes.add(Thread.currentThread().getContextClassLoader().loadClass(className));
} catch (ClassNotFoundException e) {
throw new LtsRuntimeException(e);
}
}
}
} catch (IOException e) {
throw new LtsRuntimeException(e);
}
}
/**
* 以文件的方式扫描包下的所有Class文件
*/
private void doScanPackageClassesByFile(Set<Class<?>> classes,
String packageName, String packagePath, boolean recursive) {
File dir = new File(packagePath);
if (!dir.exists() || !dir.isDirectory()) {
return;
}
final boolean fileRecursive = recursive;
File[] dirfiles = dir.listFiles(new FileFilter() {
// 自定义文件过滤规则
public boolean accept(File file) {
if (file.isDirectory()) {
return fileRecursive;
}
String filename = file.getName();
return !(excludeInner && filename.indexOf('$') != -1) && filterClassName(filename);
}
});
for (File file : dirfiles) {
if (file.isDirectory()) {
doScanPackageClassesByFile(classes, packageName + "."
+ file.getName(), file.getAbsolutePath(), recursive);
} else {
String className = file.getName().substring(0,
file.getName().length() - 6);
try {
classes.add(Thread.currentThread().getContextClassLoader()
.loadClass(packageName + '.' + className));
} catch (ClassNotFoundException e) {
throw new LtsRuntimeException(e);
}
}
}
}
/**
* 根据过滤规则判断类名
*/
private boolean filterClassName(String className) {
if (!className.endsWith(".class")) {
return false;
}
if (null == this.classFilters || this.classFilters.isEmpty()) {
return true;
}
String tmpName = className.substring(0, className.length() - 6);
boolean flag = false;
for (String str : classFilters) {
String tmpReg = "^" + str.replace("*", ".*") + "$";
Pattern p = Pattern.compile(tmpReg);
if (p.matcher(tmpName).find()) {
flag = true;
break;
}
}
return (checkInOrEx && flag) || (!checkInOrEx && !flag);
}
public boolean isExcludeInner() {
return excludeInner;
}
public boolean isCheckInOrEx() {
return checkInOrEx;
}
public List<String> getClassFilters() {
return classFilters;
}
public void setExcludeInner(boolean pExcludeInner) {
excludeInner = pExcludeInner;
}
public void setCheckInOrEx(boolean pCheckInOrEx) {
checkInOrEx = pCheckInOrEx;
}
public void setClassFilters(List<String> pClassFilters) {
classFilters = pClassFilters;
}
// public static void main(String[] args) {
//
// // 自定义过滤规则
// List<String> classFilters = new ArrayList<String>();
// classFilters.add("File*");
//
// // 创建一个扫描处理器，排除内部类 扫描符合条件的类
// ClassPathScanHandler handler = new ClassPathScanHandler(true, false, classFilters);
//
// System.out
// .println("开始递归扫描jar文件的包：org.apache.commons.io 下符合自定义过滤规则的类...");
// Set<Class<?>> calssList = handler.getPackageAllClasses(
// "org.apache.commons.io", true);
//
//
// for (Class<?> cla : calssList) {
// System.out.println(cla.getName());
// }
// System.out.println("开始递归扫描file文件的包：michael.hessian 下符合自定义过滤规则的类...");
// classFilters.clear();
// classFilters.add("Hessian*");
// calssList = handler.getPackageAllClasses("michael.hessian", true);
// for (Class<?> cla : calssList) {
// System.out.println(cla.getName());
// }
// }
}