initUrl方法

private String initUrl(String preurl,String taskurl) {
        
        if(JavaUtil.match(taskurl, "/[a-z]+$")!=null)
            taskurl = taskurl + "/";
        String urlEx = taskurl.substring(0, taskurl.lastIndexOf("/") + 1);
        String urlHost = "";
        try {
            urlHost = taskurl.substring(0, taskurl.indexOf("/",9)); 
            urlHost = taskurl.substring(0,taskurl.indexOf("/", urlHost.length()+1));
        } catch (Exception e) {
            urlHost = taskurl.substring(0, taskurl.length());
        }
        if (!preurl.startsWith("http")) {
            if(preurl.startsWith("/")||preurl.startsWith("../"))
                preurl=urlHost+preurl.replaceAll("\.\.", "");
            else
                preurl=urlEx+preurl.replaceFirst("\.", "");
            preurl = preurl.replaceAll("//", "/");
        }
        
        return preurl;
    }