过滤特殊字符

超、凢脫俗 2022-08-27 11:59 219阅读 0赞

//过滤特殊字符  
public static String encoding(String src)\{  
        if (src==null)  
            return "";  
        StringBuilder result=new StringBuilder();  
        if (src!=null)\{  
            src=src.trim();  
            for (int pos=0;pos<src.length();pos++)\{  
                switch(src.charAt(pos))\{  
                    case '/"':result.append(""");break;  
                    case '<':result.append("<");break;  
                    case '>':result.append(">");break;  
                    case '/'':result.append("&apos;");break;  
                    case '&':result.append("&");break;  
                    case '%':result.append("&pc;");break;  
                    case '\_':result.append("&ul;");break;  
                    case '\#':result.append("&shap;");break;  
                    case '?':result.append("&ques;");break;  
                    default:result.append(src.charAt(pos));break;  
                \}  
            \}  
        \}  
        return result.toString();  
    \}  
     
//反过滤特殊字符  
    public static String decoding(String src)\{  
        if (src==null)  
            return "";  
        String result=src;  
        result=result.replace(""", "/"").replace("&apos;", "/'");  
        result=result.replace("<", "<").replace(">", ">");  
        result=result.replace("&", "&");  
        result=result.replace("&pc;", "%").replace("&ul", "\_");  
        result=result.replace("&shap;", "\#").replace("&ques", "?");  
        return result;  
    \}

//利用反射调用一个继承层次上的函数族，比如安装程序，有安装数据库的，安装文件系统的等，命名均已“install”开始，你就可以将参数part设为“install”，src是其实类实例，root是终止父类  
    public static <T> void invokeMethods(String part,T src,Class root) throws ExceptionManager\{  
        if (root!=null)\{  
            if (!root.isInstance(src))return;  
            root=(Class)root.getGenericSuperclass();  
        \}  
        HashMap<String,Method> invokees=new HashMap<String,Method>();  
        Class target=src.getClass();  
        do\{  
            Method \[\] methods=target.getDeclaredMethods();  
            for (Method method:methods)\{  
                String mn=method.getName();  
                Boolean isPass=mn.startsWith(part);  
                if (isPass)\{  
                    Integer nopt=method.getParameterTypes().length;  
                    Boolean isStatic=Modifier.isStatic(method.getModifiers());  
                    if ((nopt==0)&&(!isStatic))\{  
                        if (!invokees.containsKey(mn))  
                            invokees.put(mn, method);  
                    \}  
                \}  
            \}  
            target=(Class)target.getGenericSuperclass();  
        \}while(target!=root);  
        Iterator<String> methods=invokees.keySet().iterator();  
        while (methods.hasNext())\{  
            Method invokee=invokees.get(methods.next());  
            Boolean access=invokee.isAccessible();  
            invokee.setAccessible(true);  
            try \{  
                invokee.invoke(src);  
            \} catch (InvocationTargetException e) \{  
                throw ExceptionManager.wrap(e.getTargetException());  
            \}catch (Exception e)\{\}  
            invokee.setAccessible(access);  
        \}  
    \}