tomcat动态映射路径

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;

import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;

public class FileUtils {

	/**
	 * 通过class获取本身所在目录的URL
	 */
	private static URL url = FileUtils.class.getResource("/");
	/**
	 * 获取项目绝对路径
	 */
	public static String getProjectPath() {
		String path = url.getPath().split("/WEB-INF")[0];
		return path;
	}
	
	/**
	 * 获取tomcat绝对路径
	 * @return
	 */
	public static String getTomcatPath() {
		String path = getProjectPath();
		path = path.substring(0, path.lastIndexOf("/"));
		path = path.substring(0, path.lastIndexOf("/"));
		return path;
	}
	
	/**
	 * 获取Webapps绝对路径
	 * @return
	 */
	public static String getWebappsPath() {
		String path = getProjectPath();
		path = path.substring(0, path.lastIndexOf("/"));
		return path;
	}
	
	/**
	 * 获取data绝对路径
	 * @return
	 */
	public static String getDataPath() {
		return getTomcatPath() + "/data";
	}
	
	/**
	 * 创建虚拟目录的方法--直接设置映射的路径和映射路径
	 * @param docBase 被映射的真实路径
	 * @param path 映射的路径
	 * @throws IOException
	 * @throws JDOMException
	 */
	public static void setUrlPattern(String docBase, String path) throws IOException {
		String filesPath = docBase + path;
		File file = new File(filesPath);
		if (!file.exists()) {
			file.mkdirs();
		}
		Element root = DocumentHelper.createElement("Context");
		Document document = DocumentHelper.createDocument(root);
		root.addAttribute("docBase", filesPath)
		.addAttribute("path", path)
		.addAttribute("reloadable", "true");
		// 把生成的xml文档存放在硬盘上 true代表是否换行
		OutputFormat format = new OutputFormat();
		format.setEncoding("utf-8");
		StringBuilder savePath = new StringBuilder(getTomcatPath() + "/conf/Catalina/localhost/" + path + ".xml");
		XMLWriter xmlWriter = new XMLWriter(new FileOutputStream(savePath.toString()), format);
		xmlWriter.write(document);
		xmlWriter.close();
	}
	
	/**
	 * 创建虚拟目录的方法--直接设置映射的路径，默认映射为files
	 * @param docBase 被映射的真实路径,映射的路径默认是files
	 * @throws IOException
	 * @throws JDOMException
	 */
	public static void setUrlPattern(String path) throws IOException {
		setUrlPattern(getDataPath(), path);
	}
	/**
	 * 创建虚拟目录的方法--直接设置映射的路径，默认映射为files
	 * @param docBase 被映射的真实路径默认<tomcat目录>/data/files目录,映射的路径默认是files
	 * @throws IOException
	 * @throws JDOMException
	 */
	public static void setUrlPattern() throws IOException {
		setUrlPattern(getDataPath(), "files");
	}
	
	public static boolean isUrlPatternExist(String path) {
		StringBuilder savePath = new StringBuilder(getTomcatPath() + "/conf/Catalina/localhost/" + path + ".xml");
		File file = new File(savePath.toString());
		if (file.exists()) {
			return true;
		}
		return false;
	}
	
	public static boolean isUrlPatternExist() {
		StringBuilder savePath = new StringBuilder(getTomcatPath() + "/conf/Catalina/localhost/files.xml");
		File file = new File(savePath.toString());
		if (file.exists()) {
			return true;
		}
		return false;
	}
	
}