java類獲取web應用的根目錄

java類獲取web應用的根目錄

/**
*

* java類獲取web應用的根目錄
*

*/
public class PathUtil {

 

/**
   * @param args
   */
public static void main(String[] args)throws Exception {
   PathUtil p = new PathUtil();
   System.out.println(p.getWebClassesPath());
   System.out.println(p.getWebInfPath());
   System.out.println(p.getWebRoot());
}

public String getWebClassesPath() {
   String path = getClass().getProtectionDomain().getCodeSource()
     .getLocation().getPath();
   return path;
  
}

public String getWebInfPath() throws IllegalAccessException{
   String path = getWebClassesPath();
   if (path.indexOf("WEB-INF") > 0) {
    path = path.substring(0, path.indexOf("WEB-INF")+8);
   } else {
    throw new IllegalAccessException("路徑獲取錯誤");
   }
   return path;
}

public String getWebRoot() throws IllegalAccessException{
   String path = getWebClassesPath();
   if (path.indexOf("WEB-INF") > 0) {
    path = path.substring(0, path.indexOf("WEB-INF/classes"));
   } else {
    throw new IllegalAccessException("路徑獲取錯誤");
   }
   return path;
}
}