1.Java如何生成支付宝RSA2签名
Java如何生成支付宝RSA2签名
对支付宝进行设置再回主页面进行转义，支付支付具体步骤如下。宝源线上教育源码支付宝APP支付（Java后台生成签名具体步骤）
/
***支付宝支付
* @param orderId 订单编号
* @param actualPay 实际支付金额
* @return
*/
private String getOrderInfoByAliPay(String orderId,码支多仓库源码float actualPay) {
//回调页面
String ali_call_back_url = propertiesService.ALI_CALL_BACK_URL;
String seller_id = propertiesService.SELLER_ID;//商户编号
String[] parameters={
"service=\"mobile.securitypay.pay\"",//固定值（手机快捷支付）
"partner=\"\"",//合作身份者ID（位）
"_input_charset=\"utf-8\"",
"notify_url=\""+ali_call_back_url+"\"",//通知地址
"out_trade_no=\""+orderId+"\"",//商户内部订单号
"subject=\"测试\"",//测试
"payment_type=\"1\"",//固定值
"seller_id=\""+seller_id+"\"",//账户邮箱
"total_fee=\""+"0."+"\"",//支付金额（元）
"body=\"订单说明\"",//订单说明
"it_b_pay=\"m\""（订单过期时间 分钟过期无效）
};
String signOrderUrl = signAllString(parameters);
return signOrderUrl;
}
/
*** 支付宝签名
* @param array
* @return
*/
private String signAllString(String [] array){
StringBuffer sb = new StringBuffer("");
for (int i = 0; i < array.length; i++) {
if(i==(array.length-1)){
sb.append(array[i]);
}else{
sb.append(array[i]+"&");
}
}
System.out.println(sb.toString());
String sign = "";
try {
sign = URLEncoder.encode(RSA.sign(sb.toString(), AlipayConfig.private_key, "utf-8"), "utf-8");//private_key私钥
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
sb.append("&sign=\""+sign+"\"&");
sb.append("sign_type=\"RSA\"");
return sb.toString();
}
package com.alipay.sign;
import javax.crypto.Cipher;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.security.KeyFactory;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.XEncodedKeySpec;
public class RSA{
public static final String SIGN_ALGORITHMS = "SHA1WithRSA";
/
*** RSA签名
* @param content 待签名数据
* @param privateKey 商户私钥
* @param input_charset 编码格式
* @return 签名值
*/
public static String sign(String content, String privateKey, String input_charset)
{
try
{
byte[] decode = Base.decode(privateKey);
PKCS8EncodedKeySpec priPKCS8 = new PKCS8EncodedKeySpec(decode );
KeyFactory keyf= KeyFactory.getInstance("RSA");
PrivateKey priKey= keyf.generatePrivate(priPKCS8);
java.security.Signature signature = java.security.Signature.getInstance(SIGN_ALGORITHMS);
signature.initSign(priKey);
signature.update( content.getBytes(input_charset) );
byte[] signed = signature.sign();
return Base.encode(signed);
}
catch (Exception e)
{
e.printStackTrace();
}
return null;
}
/
*** RSA验签名检查
* @param content 待签名数据
* @param sign 签名值
* @param ali_public_key 支付宝公钥
* @param input_charset 编码格式
* @return 布尔值
*/
public static boolean verify(String content, String sign, String ali_public_key, String input_charset)
{
try
{
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
byte[] encodedKey = Base.decode(ali_public_key);
PublicKey pubKey = keyFactory.generatePublic(new XEncodedKeySpec(encodedKey));
java.security.Signature signature = java.security.Signature
.getInstance(SIGN_ALGORITHMS);
signature.initVerify(pubKey);
signature.update( content.getBytes(input_charset) );
boolean bverify = signature.verify( Base.decode(sign) );
return bverify;
}
catch (Exception e)
{
e.printStackTrace();
}
return false;
}
/
*** 解密
* @param content 密文
* @param private_key 商户私钥
* @param input_charset 编码格式
* @return 解密后的字符串
*/
public static String decrypt(String content, String private_key, String input_charset) throws Exception {
PrivateKey prikey = getPrivateKey(private_key);
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.DECRYPT_MODE, prikey);
InputStream ins = new ByteArrayInputStream(Base.decode(content));
ByteArrayOutputStream writer = new ByteArrayOutputStream();
//rsa解密的字节大小最多是，将需要解密的付宝logbook源码讲解内容，按位拆开解密
byte[] buf = new byte[];
int bufl;
while ((bufl = ins.read(buf)) != -1) {
byte[] block = null;
if (buf.length == bufl) {
block = buf;
} else {
block = new byte[bufl];
for (int i = 0; i < bufl; i++) {
block[i] = buf[i];
}
}
writer.write(cipher.doFinal(block));
}
return new String(writer.toByteArray(),代码mybatis源码接口 input_charset);
}
/
*** 得到私钥
* @param key 密钥字符串（经过base编码）
* @throws Exception
*/
public static PrivateKey getPrivateKey(String key) throws Exception {
byte[] keyBytes;
keyBytes = Base.decode(key);
PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
PrivateKey privateKey = keyFactory.generatePrivate(keySpec);
return privateKey;
}
}
