Java微信公众号服务器配置-验证Token

一、填写服务器配置

首先我们需要在微信公众平台上填写服务器配置

重点内容

    服务器地址URL（一定要外网能访问的到）
        在我们提交配置的时候，微信会发送GET请求到URL上，
        并会携带 signature，timestamp，nonce，echostr 四个参数，
        我的URL是 http://www.baidu.com/wxpublic/verify_wx_token，
        也就是 域名 + 接口 路径，至于怎么验证，我会在下面说到
        signature： 微信加密签名，signature结合了我们自己填写的token参数和请求中的timestamp参数、nonce参数
        timestamp： 时间戳
        nonce： 字符串
        echostr： 随机字符串
    令牌Token
        Token 可由我们自行定义，主要作用是参与生成签名，与微信请求的签名进行比较
    消息加解密密钥EncodingAESKey
        EncodingAESKey 可由我们自行定义或随机生成，主要作用是参与接收和推送给公众平台消息的加解密
    消息加解密方式
        此处我选择的是安全模式，大家可以根据自己的具体需求，选择相应的模式

 

二、代码验证

 @RequestMapping("/wxpublic/verify_wx_token")
    @Response
    public String verifyWXToken(HttpServletRequest request) throws AesException {
        String msgSignature = request.getParameter("signature");
        String msgTimestamp = request.getParameter("timestamp");
        String msgNonce = request.getParameter("nonce");
        String echostr = request.getParameter("echostr");
        if (WXPublicUtils.verifyUrl(msgSignature, msgTimestamp, msgNonce)) {
            return echostr;
        }
        return null;
    }

 

WXPublicUtils

    public class WXPublicUtils {

    /**
     * 验证Token
     * @param msgSignature 签名串，对应URL参数的signature
     * @param timeStamp 时间戳，对应URL参数的timestamp
     * @param nonce 随机串，对应URL参数的nonce
     *
     * @return 是否为安全签名
     * @throws AesException 执行失败，请查看该异常的错误码和具体的错误信息
     */
    public static boolean verifyUrl(String msgSignature, String timeStamp, String nonce)
            throws AesException {
        // 这里的 WXPublicConstants.TOKEN 填写你自己设置的Token就可以了
        String signature = SHA1.getSHA1(WXPublicConstants.TOKEN, timeStamp, nonce);
        if (!signature.equals(msgSignature)) {
            throw new AesException(AesException.ValidateSignatureError);
        }
        return true;
    }
}

 
AesException

@SuppressWarnings("serial")
public class AesException extends Exception {

    public final static int OK = 0;
    public final static int ValidateSignatureError = -40001;
    public final static int ParseXmlError = -40002;
    public final static int ComputeSignatureError = -40003;
    public final static int IllegalAesKey = -40004;
    public final static int ValidateAppidError = -40005;
    public final static int EncryptAESError = -40006;
    public final static int DecryptAESError = -40007;
    public final static int IllegalBuffer = -40008;
    public final static int EncodeBase64Error = -40009;
    public final static int DecodeBase64Error = -40010;
    public final static int GenReturnXmlError = -40011;

    private int code;

    private static String getMessage(int code) {
        switch (code) {
        case ValidateSignatureError:
            return "签名验证错误";
        case ParseXmlError:
            return "xml解析失败";
        case ComputeSignatureError:
            return "sha加密生成签名失败";
        case IllegalAesKey:
            return "SymmetricKey非法";
        case ValidateAppidError:
            return "appid校验失败";
        case EncryptAESError:
            return "aes加密失败";
        case DecryptAESError:
            return "aes解密失败";
        case IllegalBuffer:
            return "解密后得到的buffer非法";
        case EncodeBase64Error:
            return "base64加密错误";
        case DecodeBase64Error:
            return "base64解密错误";
        case GenReturnXmlError:
            return "xml生成失败";
        default:
            return null;
        }
    }

    public int getCode() {
        return code;
    }

    public AesException(int code) {
        super(getMessage(code));
        this.code = code;
    }
}


SHA1

public class SHA1 {

    /**
     * 用SHA1算法验证Token
     *
     * @param token     票据
     * @param timestamp 时间戳
     * @param nonce     随机字符串
     * @return 安全签名
     * @throws AesException
     */
    public static String getSHA1(String token, String timestamp, String nonce) throws AesException {
        try {
            String[] array = new String[]{token, timestamp, nonce};
            StringBuffer sb = new StringBuffer();
            // 字符串排序
            Arrays.sort(array);
            for (int i = 0; i < 3; i++) {
                sb.append(array[i]);
            }
            String str = sb.toString();
            // SHA1签名生成
            MessageDigest md = MessageDigest.getInstance("SHA-1");
            md.update(str.getBytes());
            byte[] digest = md.digest();

            StringBuffer hexstr = new StringBuffer();
            String shaHex = "";
            for (int i = 0; i < digest.length; i++) {
                shaHex = Integer.toHexString(digest[i] & 0xFF);
                if (shaHex.length() < 2) {
                    hexstr.append(0);
                }
                hexstr.append(shaHex);
            }
            return hexstr.toString();
        } catch (Exception e) {
            e.printStackTrace();
            throw new AesException(AesException.ComputeSignatureError);
        }
    }
}
---------------------
作者：Gene Xu
来源：优快云
原文：https://blog.youkuaiyun.com/goodbye_youth/article/details/80590831
版权声明：本文为博主原创文章，转载请附上博文链接！

转载于:https://www.cnblogs.com/zhouwen2017/p/10451427.html