微信公衆號開發 token服務器驗證

校驗控制層方法

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;


@WebServlet("/wx")
public class WeixinServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String signature = req.getParameter("signature");
        // 微信加密簽名
        String timestamp = req.getParameter("timestamp");
        // 時間戳
        String nonce = req.getParameter("nonce");
        // 隨機數
        String echostr = req.getParameter("echostr");
        // 隨機字符串
        PrintWriter out = resp.getWriter();
        if (CheckUtil.checkSignature(signature, timestamp, nonce)) {
            out.print(echostr);
        }
    }


    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) {
    }

}

CheckUtil中進行sha-1加密，對比和signature是否相同

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;

/**
 * 微信公衆號進行服務器校驗檢查token方法
 */
@Slf4j
public class CheckUtil {
    // 與接口配置信息中的Token要一致
    private static String token = "Token";

    //校驗簽名
    public static boolean checkSignature(String signature, String timestamp, String nonce) {
        log.info("signature:" + signature + "timestamp:" + timestamp + "nonc:" + nonce);
        System.out.println("signature:" + signature + "timestamp:" + timestamp + "nonc:" + nonce);
        // 將token、timestamp、nonce三個參數進行字典序排序
        String[] arr = new String[]{token, timestamp, nonce};
        Arrays.sort(arr);
        StringBuilder content = new StringBuilder();
        for (String s : arr) {
            content.append(s);
        }
        MessageDigest md = null;
        String tmpStr = null;
        try {
            md = MessageDigest.getInstance("SHA-1");
            // 將三個參數字符串拼接成一個字符串進行sha1加密
            byte[] digest = md.digest(content.toString().getBytes());
            tmpStr = CheckUtil.byteToStr(digest);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            log.error("sha-1加密發生錯誤：" + Arrays.toString(e.getStackTrace()));
        }
        content = null;
        // 將sha1加密後的字符串可與signature對比，標識該請求來源於微信
        String msg = "本次校驗的結果是：" + tmpStr.equals(signature.toUpperCase());
        log.info(msg);
        return tmpStr != null ? tmpStr.equals(signature.toUpperCase()) : false;
    }

    /**
     * 將字節數組轉換爲十六進制字符串
     *
     * @param byteArray
     * @return
     */
    private static String byteToStr(byte[] byteArray) {
        String strDigest = "";
        for (int i = 0; i < byteArray.length; i++) {
            strDigest += CheckUtil.byteToHexStr(byteArray[i]);
        }
        return strDigest;
    }

    /**
     * 將字節轉換爲十六進制字符串
     *
     * @param mByte
     * @return
     */
    private static String byteToHexStr(byte mByte) {
        char[] Digit = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
        char[] tempArr = new char[2];
        tempArr[0] = Digit[(mByte >>> 4) & 0X0F];
        tempArr[1] = Digit[mByte & 0X0F];
        String s = new String(tempArr);
        return s;
    }
}