Java處理檔案路徑的類

轉帖說明:非常的好用,方便在進行Velocity和FreeMarker組建檔案時候處理要組建檔案的路徑問題

package util;

import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
 
/** *//**
* @author <a href="mailto:maryang@live.cn" mce_href="Maryangmailto:maryang@live.cn">Maryang</a>
* @version $Revision: 1.0 $
* 這個類提供了一些根據類的class檔案位置來定位的方法。
*/
public class PathUtil {
   
    /** *//**
     * 擷取一個Class的絕對路徑
     * @param clazz Class對象
     * @return Class的絕對路徑
     */
    public static String getPathByClass(Class clazz){
        String path = null;
        try {
            URI uri = clazz.getResource("").toURI();
            File file = new File(uri);
            path = file.getCanonicalPath();
        } catch (URISyntaxException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return path;
    }
   
    /** *//**
     * 擷取一個檔案相對於一個Class相對的絕對路徑
     * @param clazz Class對象
     * @param relativePath Class對象的相對路徑
     * @return 檔案絕對路徑
     */
    public static String getFilePathByClass(Class clazz,String relativePath){
        String filePath = null;
        String clazzPath = getPathByClass(clazz);
        StringBuffer sbPath = new StringBuffer(clazzPath);
        sbPath.append(File.separator);
        sbPath.append(relativePath);
        File file = new File(sbPath.toString());
        try {
            filePath = file.getCanonicalPath();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return filePath;
    }
    public static void main(String[] args) {
        try {
            System.out.println(getPathByClass(PathUtil.class));
           System.out.println(getFilePathByClass(PathUtil.class,"../../images/logo.gif"));
           System.out.println(getFilePathByClass(PathUtil.class,"../../../"));
          
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

 

/*

E:/MyWorkspace/FreeMarkerTest/WebRoot/WEB-INF/classes/util
E:/MyWorkspace/FreeMarkerTest/WebRoot/WEB-INF/images/logo.gif
E:/MyWorkspace/FreeMarkerTest/WebRoot

*/