package com.dsh.guns.modular.system.controller.util;
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import java.io.UnsupportedEncodingException;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.util.*;
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/**
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* 曹操接口请求签名工具包
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* @author 吕雪
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* @createDate 2020年01月15日
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* client_id:f168c651bf86f2c1
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* sign_key:6d2c6566598949478bef1b5d91451e9f
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*/
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public class SignUtil {
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/**
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* 获取签名
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* @param params
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* @return
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*/
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public static String sign(Map<String, Object> params){
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params.put("sign_key", "6d2c6566598949478bef1b5d91451e9f");
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Map<String, String> needVerify = new HashMap<>();
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for (Map.Entry<String, Object> entry : params.entrySet()) {
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needVerify.put(entry.getKey(), String.valueOf(entry.getValue()));
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}
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List<Map.Entry<String, String>> entryList = new ArrayList<>(needVerify.entrySet());
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//排序
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Collections.sort(entryList, (o1, o2) -> o1.getKey().compareTo(o2.getKey()));
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StringBuilder buffer = new StringBuilder();
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for (Map.Entry<String, String> entry : entryList) {
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buffer.append(entry.getKey()).append(entry.getValue());
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}
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System.out.println("sha1 签名参数:"+buffer.toString());
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try {
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return encodeBySHA(buffer.toString(),"utf-8");
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} catch (Exception e) {
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e.printStackTrace();
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}
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return null;
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}
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/**
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* 使用SHA算法加密
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* @param str
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* @param charset
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* @return
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* @throws Exception
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*/
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public static String encodeBySHA(String str,String charset) throws Exception {
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MessageDigest messageDigest = null;
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try {
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messageDigest = MessageDigest.getInstance("SHA");
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messageDigest.reset();
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messageDigest.update(str.getBytes(charset));
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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throw new Exception("不能调用指定的加密算法。");
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} catch (UnsupportedEncodingException e) {
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e.printStackTrace();
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throw new Exception("字符串不支持"+ charset +"的转换。");
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}
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return byteArrayToString(messageDigest.digest());
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}
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/**
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* 将byte数组转化为16进制字符串
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* @param byteArray
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* @return
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*/
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private static String byteArrayToString(byte[] byteArray){
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StringBuilder strBuilder = new StringBuilder();
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for (int i = 0; i < byteArray.length; i++) {
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if (Integer.toHexString(0xFF & byteArray[i]).length() == 1) {
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strBuilder.append("0").append(Integer.toHexString(0xFF & byteArray[i]));
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} else {
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strBuilder.append(Integer.toHexString(0xFF & byteArray[i]));
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}
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}
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return strBuilder.toString();
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}
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}
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