import org.springframework.util.StringUtils;标签:JAVA,String,privateKey,接口,sign,util,import,public,append From: https://blog.51cto.com/u_15753094/5831052
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;
}
}