API对接中经常会出现的签名获取，这只是某一种，仅供给有需要的人参考
要求：
1.对所有传入参数(含系统参数和接口参数)按照字段名的 ASCII 码从小到大排序（字典序）后，使用 URL 键值对的格式。（即 key1=value1&key2=value2…）拼接成字符串string1， 注意：值为空的参数不参与签名。
2.在string1后面拼接上key=privateKey得到stringSign字符串，并对stringSign进行sha1运算，再将得到的字符串转为大写，得到sign值。如对 age=12&name=张三 key=privateKey 进行 sha1 加密后得到 xxxxx。
参考代码：
public class Encrypt {
private static Logger logger = LoggerFactory.getLogger(Encrypt.class);
public static final String key = "12345abc";
public static void main(String[] args) {
//创建实体类
SubmitAssetRequest submitAssetRequest = new SubmitAssetRequest();
submitAssetRequest.setBidType("1");
submitAssetRequest.setBankCardNo("6217002870039791536");
submitAssetRequest.setBankName("中国建设银行");
submitAssetRequest.setPeriodsType(1);
submitAssetRequest.setAmount(new BigDecimal(1000));
submitAssetRequest.setIdCardNumber("420117199105248734");
submitAssetRequest.setMobile("18807111634");
submitAssetRequest.setSex(1);
submitAssetRequest.setMarriageState(0);
submitAssetRequest.setName("张三");
submitAssetRequest.setPeriods(14);
submitAssetRequest.setChannelCode("NYD");
submitAssetRequest.setRates(new BigDecimal(23.76));
submitAssetRequest.setOrderId("101537895995716001");
//参数封装到map集合
Map<String, String> map = getMap(submitAssetRequest);
//排序
String sign = getSign(map);
System.out.println(sign);
}
/**
* 将参数封装到map集合，不为空的参数添加进去
* @param request
* @return
*/
public static Map<String, String> getMap(SubmitAssetRequest request){
Map<String, String> map = new HashMap<>();
map.put("channelCode",request.getChannelCode());
map.put("orderId",request.getOrderId());
map.put("name",request.getName());
if (!StringUtils.isEmpty(request.getInvestorList())){
map.put("investorList",request.getInvestorList());
}
map.put("bidType",request.getBidType());
map.put("sex",String.valueOf(request.getSex()));
map.put("mobile",request.getMobile());
map.put("idCardNumber",request.getIdCardNumber());
map.put("bankName",request.getBankName());
map.put("bankCardNo",request.getBankCardNo());
if (!StringUtils.isEmpty(request.getLoanUse())){
map.put("loanUse",request.getLoanUse());
}
if (request.getIncome() != null){
map.put("income",String.valueOf(request.getIncome()));
}
if (!StringUtils.isEmpty(request.getAddress())){
map.put("address",request.getAddress());
}
if (!StringUtils.isEmpty(request.getBirthPlace())){
map.put("birthPlace",request.getBirthPlace());
}
if (String.valueOf(request.getMarriageState()) != null){
map.put("marriageState",String.valueOf(request.getMarriageState()));
}
map.put("periods",String.valueOf(request.getPeriods()));
map.put("periodsType",String.valueOf(request.getPeriodsType()));
map.put("amount",String.valueOf(request.getAmount()));
map.put("rates",String.valueOf(request.getRates()));
return map;
}
public static String getSign(Map<String, String> map){
if (map == null || map.size() == 0) {
return null;
}
List<String> list = new ArrayList<>();
for (Map.Entry<String,String> entry : map.entrySet()) {
if(entry.getValue()==null || entry.getValue().trim().length()==0){
continue;
}
list.add(entry.getKey());
}
Collections.sort(list);
logger.info("排序后的list:"+list.toString());
StringBuilder sb = new StringBuilder();
for (String str:list){
try {
sb.append(str).append("=").append(URLEncoder.encode(map.get(str).toString(),"UTF-8")).append("&");
} catch (UnsupportedEncodingException e) {
logger.error("编码异常",e);
}
}
sb.append("key=");
sb.append(key);
String ss = sb.toString();
if (ss == null) {
return null;
}
String result = DigestUtils.sha1Hex(ss.getBytes());
logger.info("最终结果:"+result);
//转为大写
String upperCase = result.toUpperCase();
return upperCase;
}
}
//对应实体类
public class SubmitAssetRequest {
//渠道号
private String channelCode;
//订单号
private String orderId;
//姓名
private String name;
//投资人列表(非必传)
private String investorList;
//标的类型 1:定向标 2:非定向标
private String bidType;
//性别 1:表示男性 2:表示女性
private int sex;
//手机号
private String mobile;
//身份证号
private String idCardNumber;
//银行名称
private String bankName;
//银行卡号
private String bankCardNo;
//借款用途(非必传)
private String loanUse;
//收入(非必传)
private String income;
//住址(非必传)
private String address;
//户籍地址(非必传)
private String birthPlace;
//婚姻状况(非必传) 0 未婚 1 已婚
private int marriageState;
//借款期限 =1 时，表示天; =2 时，表示期
private int periods;
//期限类型 1 表示单期 ; 2 表示多期
private int periodsType;
//借款金额
private BigDecimal amount;
//借款利率
private BigDecimal rates;
//签名
private String sign;
public String getChannelCode() {
return channelCode;
}
public void setChannelCode(String channelCode) {
this.channelCode = channelCode;
}
public String getOrderId() {
return orderId;
}
public void setOrderId(String orderId) {
this.orderId = orderId;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getInvestorList() {
return investorList;
}
public void setInvestorList(String investorList) {
this.investorList = investorList;
}
public String getBidType() {
return bidType;
}
public void setBidType(String bidType) {
this.bidType = bidType;
}
public int getSex() {
return sex;
}
public void setSex(int sex) {
this.sex = sex;
}
public String getMobile() {
return mobile;
}
public void setMobile(String mobile) {
this.mobile = mobile;
}
public String getIdCardNumber() {
return idCardNumber;
}
public void setIdCardNumber(String idCardNumber) {
this.idCardNumber = idCardNumber;
}
public String getBankName() {
return bankName;
}
public void setBankName(String bankName) {
this.bankName = bankName;
}
public String getBankCardNo() {
return bankCardNo;
}
public void setBankCardNo(String bankCardNo) {
this.bankCardNo = bankCardNo;
}
public String getLoanUse() {
return loanUse;
}
public void setLoanUse(String loanUse) {
this.loanUse = loanUse;
}
public String getIncome() {
return income;
}
public void setIncome(String income) {
this.income = income;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getBirthPlace() {
return birthPlace;
}
public void setBirthPlace(String birthPlace) {
this.birthPlace = birthPlace;
}
public int getMarriageState() {
return marriageState;
}
public void setMarriageState(int marriageState) {
this.marriageState = marriageState;
}
public int getPeriods() {
return periods;
}
public void setPeriods(int periods) {
this.periods = periods;
}
public int getPeriodsType() {
return periodsType;
}
public void setPeriodsType(int periodsType) {
this.periodsType = periodsType;
}
public BigDecimal getAmount() {
return amount;
}
public void setAmount(BigDecimal amount) {
this.amount = amount;
}
public BigDecimal getRates() {
return rates;
}
public void setRates(BigDecimal rates) {
this.rates = rates;
}
public String getSign() {
return sign;
}
public void setSign(String sign) {
this.sign = sign;
}
}
