hunjianghu/Servlet/WeChat/sqlfilter.java

package WeChat;

// 过滤掉奇奇怪怪的英文字符
public class sqlfilter {
    private static String danger="`~!@#$^&*()=|{}';'\\[].<>/?~！@#￥……&*——|{}";
    public static boolean islegal(String text) {
        int length = text.length();
        if(length>5) return false;
        for(int i=0; i<length; i++){
            char digit = text.charAt(i);
            if(!(digit>='0'&&digit<='9')) return false;
        }
        return true;
    }
    public static boolean isright(String Status){
        if(Status.equals("待付款")||Status.equals("待收货")||Status.equals("待发货")||Status.equals("待评价")) return true;
        else return false;
    }
    public static String filter(String sqlQue) {
        StringBuffer ret = new StringBuffer();
        for (int i = 0; i < sqlQue.length(); i++) {
            char sign = sqlQue.charAt(i);
            if (danger.indexOf(sign) == -1) ret.append(sign);
        }
        return ret.toString();
    }
}