JAVA 接口签名sign生成工具类

朱雀 2022-03-16 15:37 503阅读 0赞

import org.springframework.util.StringUtils;
    
    import java.util.Map;
    import java.util.Random;
    import java.util.TreeMap;
    
    /**
     * @Author: JCccc
     * @CreateTime: 2018-10-30
     * @Description:
     */
    public class SignUtils {
    
    
    
        public String getTimestamp() {
            //生成时间戳
    
            long timestampLong =System.currentTimeMillis();
    
            String timestampStr = String.valueOf(timestampLong);
    
            return timestampStr;
        }
    
    
    
        public String getNonceStr(int length){
    
            //生成随机字符串
    
            String str="zxcvbnmlkjhgfdsaqwertyuiopQWERTYUIOPASDFGHJKLZXCVBNM1234567890";
    
            Random random=new Random();
    
            StringBuffer randomStr=new StringBuffer();
    
            // 设置生成字符串的长度，用于循环
    
            for(int i=0; i<length; ++i){
                //从62个的数字或字母中选择
    
                int number=random.nextInt(62);
    
                //将产生的数字通过length次承载到sb中
    
                randomStr.append(str.charAt(number));
            }
    
            //将承载的字符转换成字符串
    
            return randomStr.toString();
        }
    
    
    //类似微信接口的签名生成方法
        public String createSign(Map<String, String> params, String privateKey){
            StringBuilder sb = new StringBuilder();
            // 将参数以参数名的字典升序排序
            Map<String, String> sortParams = new TreeMap<String, String>(params);
            // 遍历排序的字典,并拼接"key=value"格式
            for (Map.Entry<String, String> entry : sortParams.entrySet()) {
                String key = entry.getKey();
                String value =  entry.getValue().trim();
                if (!StringUtils.isEmpty(value))
                    sb.append("&").append(key).append("=").append(value);
            }
            String stringA = sb.toString().replaceFirst("&","");
           String privateKey="WHJBK24NXCX"; //私钥最后放在配置文件里面读取
            String stringSignTemp = stringA + "&"+"appkey="+privateKey;
            //将签名使用MD5加密并全部字母变为大写
             String signValue = Md5Encrypt.md5(stringSignTemp).toUpperCase();
             System.out.println("stringA+privateKey后MD5加密+转换全部大写生成sign为：       "+signValue);
            return signValue;
        }
    
    
    }