package com.mail.common;

import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.net.URLDecoder;

/**
 * JAVA类获取项目WebRoot目录
 */
public class PathUtil {
	//传入classes可以得到WEB-INF的路径，传入WEB-INF可得到WebRoot路径
	public static void main(String[] args) {
		PathUtil pathUtil = new PathUtil();
		System.out.println("The Path is:" + pathUtil.getWebInfPath("classes"));
	}
	
	private static PathUtil instance=null;
	
	public static PathUtil getInstance(){
		if(instance==null){
			instance=new PathUtil();
		}
		return instance;
	}
	
	public String getWebInfPath(String index4Str) {
		URL url = getClass().getProtectionDomain().getCodeSource()
				.getLocation();
		String path = url.toString();
		int index = path.indexOf(index4Str);
		if (index == -1) {
			index = path.indexOf("classes");
		}

		if (index == -1) {
			index = path.indexOf("bin");
		}

		path = path.substring(0, index);
		if (path.startsWith("zip")) {// 当class文件在war中时，此时返回zip:D:/...这样的路径
			path = path.substring(4);
		} else if (path.startsWith("file")) {// 当class文件在class文件中时，此时返回file:/D:/...这样的路径
			path = path.substring(6);
		} else if (path.startsWith("jar")) {// 当class文件在jar文件里面时，此时返回jar:file:/D:/...这样的路径
			path = path.substring(10);
		}
		try {
			path = URLDecoder.decode(path, "UTF-8");
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}

		return path;
	}
}