java 调用 rar压缩文件

public static boolean winrar(String winrarfile, String foler) {
	    //winrar软件的安装路径
	    String rarPath = "C:\\Program Files\\WinRAR\\WinRAR.exe";
	    String cmd="";
	    // cmd=rarPath+" m -p123456" + zipfile +" "+ foler;//每个文件都要加密
	    //cmd = rarPath + " a -p123456 " + zipfile + "  "+ foler;//多个文件压缩到一个包的话，每个文件都加密
	    cmd = rarPath + " a -h " + winrarfile + "  "+ foler;//整个压缩文件加密，
	    try {
                Process proc = Runtime.getRuntime().exec(cmd);
                //new ProcessClearStream(proc.getInputStream(), "INFO").start();  
     			//new ProcessClearStream(proc.getErrorStream(), "ERROR").start();  
                /* if (proc.waitFor() != 0) {
                     if (proc.exitValue() == 0)
                         return true;
                }*/
	    } catch (Exception e) {
	              e.printStackTrace();
	    }
	    return false;
	}