Class SystemUtil

src/main/java/com/my/column/util/SystemUtil.java:15–94

@author 13 @qq交流群 719099151 @email 2449207463@qq.com @link https://github.com/ZHENFENG13/My-Column

 * @link https://github.com/ZHENFENG13/My-Column
 */
public class SystemUtil {

    private SystemUtil() {
    }

    /**
     * 登录或注册成功后,生成保持用户登录状态会话token值
     *
     * @param src:为用户最新一次登录时的now()+user.id+random(4)
     * @return
     */
    public static String genToken(String src) {
        if (null == src || "".equals(src)) {
            return null;
        }
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(src.getBytes());
            String result = new BigInteger(1, md.digest()).toString(16);
            if (result.length() == 31) {
                result = result + "-";
            }
            System.out.println(result);
            return result;
        } catch (Exception e) {
            return null;
        }
    }

    /**
     * 清理string
     * @param value
     * @return
     */
    public static String cleanString(String value) {
        if (!StringUtils.hasLength(value)) {
            return "";
        }
        value = value.toLowerCase();
        value = value.replaceAll("<", "& lt;").replaceAll(">", "& gt;");
        value = value.replaceAll("\\(", "& #40;").replaceAll("\\)", "& #41;");
        value = value.replaceAll("'", "& #39;");
        value = value.replaceAll("onload", "0nl0ad");
        value = value.replaceAll("xml", "xm1");
        value = value.replaceAll("window", "wind0w");
        value = value.replaceAll("click", "cl1ck");
        value = value.replaceAll("var", "v0r");
        value = value.replaceAll("let", "1et");
        value = value.replaceAll("function", "functi0n");
        value = value.replaceAll("return", "retu1n");
        value = value.replaceAll("$", "");
        value = value.replaceAll("document", "d0cument");
        value = value.replaceAll("const", "c0nst");
        value = value.replaceAll("eval\\((.*)\\)", "");
        value = value.replaceAll("[\\\"\\\'][\\s]*javascript:(.*)[\\\"\\\']", "\"\"");
        value = value.replaceAll("script", "scr1pt");
        value = value.replaceAll("insert", "1nsert");
        value = value.replaceAll("drop", "dr0p");