当我们开发微信公众号，小程序等，微信返回给我们的数据往往是经过加密的，我们需要使用 sessionKey 配合解密，才能得到我们想要的数据
1、引入依赖
<!-- lombok依赖 -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!-- alibaba的fastjson -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.60</version>
</dependency>
<!-- 工具包 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.8.1</version>
</dependency>
<!-- rsa加密工具-->
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk15on</artifactId>
<version>1.55</version>
</dependency>2、解密工具类
import com.alibaba.fastjson.JSONObject;
import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.security.AlgorithmParameters;
import java.security.Security;
import java.util.Arrays;
@Slf4j
public class WechatUtils {
public static JSONObject decryptWechatData(String encryptedData, String iv, String sessionkey) {
// 被加密的数据
byte[] dataByte = Base64.decode(encryptedData);
// 加密秘钥
byte[] keyByte = Base64.decode(sessionkey);
// 偏移量
byte[] ivByte = Base64.decode(iv);
try {
int base = 16;
if (keyByte.length % base != 0) {
int groups = keyByte.length / base + (keyByte.length % base != 0 ? 1 : 0);
byte[] temp = new byte[groups * base];
Arrays.fill(temp, (byte) 0);
System.arraycopy(keyByte, 0, temp, 0, keyByte.length);
keyByte = temp;
}
Security.addProvider(new BouncyCastleProvider());
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding", "BC");
SecretKeySpec spec = new SecretKeySpec(keyByte, "AES");
AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES");
parameters.init(new IvParameterSpec(ivByte));
cipher.init(Cipher.DECRYPT_MODE, spec, parameters);
byte[] resultByte = cipher.doFinal(dataByte);
if (null != resultByte && resultByte.length > 0) {
String result = new String(resultByte, "UTF-8");
if (StringUtils.isNotBlank(result)) {
log.info("----------解密微信数据成功----------");
return JSONObject.parseObject(result);
}
}
} catch (Exception e) {
e.printStackTrace();
log.info("----------解密微信数据失败----------");
}
return null;
}
}这样，我们将微信加密的数据，转化成了 JSON 对象，就得到了我们想要的数据了
以上就是Java中解密微信加密数据工具类的详细内容，更多关于Java加密解密工具类的资料请关注编程网其它相关文章！
