mtons.oauth2.utils.TokenUtils Maven / Gradle / Ivy

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/*
+--------------------------------------------------------------------------
|   Mtons [#RELEASE_VERSION#]
|   ========================================
|   Copyright (c) 2014, 2015 mtons. All Rights Reserved
|   http://www.mtons.com
+---------------------------------------------------------------------------
*/
package mtons.oauth2.utils;

import com.alibaba.fastjson.JSONObject;

import java.util.Random;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Token 帮助类
 * Created by langhsu on 2017/9/2.
 */
public class TokenUtils {
    private static final String STR_S = "abcdefghijklmnopqrstuvwxyz0123456789";
    private static final Random RANDOM = new Random();

    /**
     * 参考自 qq sdk
     *
     * @param string 从字符串中获取accessToken
     * @return String 返回类型
     */
    public static String getAccessToken(String string) {
        String accessToken = "";
        try {
            JSONObject json = JSONObject.parseObject(string);
            if (null != json) {
                accessToken = json.getString("access_token");
            }
        } catch (Exception e) {
            Matcher m = Pattern.compile("^access_token=(\\w+)&expires_in=(\\w+)&refresh_token=(\\w+)$").matcher(string);
            if (m.find()) {
                accessToken = m.group(1);
            } else {
                Matcher m2 = Pattern.compile("^access_token=(\\w+)&expires_in=(\\w+)$").matcher(string);
                if (m2.find()) {
                    accessToken = m2.group(1);
                }
            }
        }
        return accessToken;
    }

    /**
     * 匹配QQ openid
     *
     * @param string 字符串
     * @return String openid
     */
    public static String getOpenId(String string) {
        String openid = null;
        Matcher m = Pattern.compile("\"openid\"\\s*:\\s*\"(\\w+)\"").matcher(string);
        if (m.find())
            openid = m.group(1);
        return openid;
    }

    /**
     * 生成一个随机数
     *
     * @return 随机数
     */
    public static String randomState() {
        int count = 24;
        char[] buffer = new char[count];
        for (int i = 0; i < count; i++) {
            buffer[i] = STR_S.charAt(RANDOM.nextInt(STR_S.length()));
        }
        return new String(buffer);
    }
}