java实现jsapi支付，微信异步通知结果

数据模型：

package com.hdd.tms.modules.payment.vo;

import lombok.Data;

/**
 * @ProjectName:    BladeX-Boot
 * @Package:        com.hdd.tms.modules.payment.vo
 * @ClassName:      NotifyResutlVo
 * @Author:     szk
 * @Description:
 * @Date:    2021/9/13 10:55
 */

@Data
public class NotifyResutlVo {
	private String id;
	private String create_time;
	private String resource_type;
	private String event_type;
	private String summary;
	private ResouceVo resource;

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getCreate_time() {
		return create_time;
	}

	public void setCreate_time(String create_time) {
		this.create_time = create_time;
	}

	public String getResource_type() {
		return resource_type;
	}

	public void setResource_type(String resource_type) {
		this.resource_type = resource_type;
	}

	public String getEvent_type() {
		return event_type;
	}

	public void setEvent_type(String event_type) {
		this.event_type = event_type;
	}

	public String getSummary() {
		return summary;
	}

	public void setSummary(String summary) {
		this.summary = summary;
	}

	public ResouceVo getResource() {
		return resource;
	}

	public void setResource(ResouceVo resource) {
		this.resource = resource;
	}

	@Override
	public String toString() {
		return "NotifyResutlVo{" +
			"id=" + id +  +
			", create_time=" + create_time +  +
			", resource_type=" + resource_type +  +
			", event_type=" + event_type +  +
			", summary=" + summary +  +
			", resource=" + resource +
			};
	}
}




package com.hdd.tms.modules.payment.vo;

import lombok.Data;

/**
 * @ProjectName:    BladeX-Boot
 * @Package:        com.hdd.tms.modules.payment.vo
 * @ClassName:      ResouceVo
 * @Author:     szk
 * @Description:
 * @Date:    2021/9/13 11:11
 */

@Data
public class ResouceVo {
   private String original_type;
   private String algorithm;
   private String ciphertext;
   private String associated_data;
   private String nonce;

	public String getOriginal_type() {
		return original_type;
	}

	public void setOriginal_type(String original_type) {
		this.original_type = original_type;
	}

	public String getAlgorithm() {
		return algorithm;
	}

	public void setAlgorithm(String algorithm) {
		this.algorithm = algorithm;
	}

	public String getCiphertext() {
		return ciphertext;
	}

	public void setCiphertext(String ciphertext) {
		this.ciphertext = ciphertext;
	}

	public String getAssociated_data() {
		return associated_data;
	}

	public void setAssociated_data(String associated_data) {
		this.associated_data = associated_data;
	}

	public String getNonce() {
		return nonce;
	}

	public void setNonce(String nonce) {
		this.nonce = nonce;
	}

	@Override
	public String toString() {
		return "ResouceVo{" +
			"original_type=" + original_type +  +
			", algorithm=" + algorithm +  +
			", ciphertext=" + ciphertext +  +
			", associated_data=" + associated_data +  +
			", nonce=" + nonce +  +
			};
	}
}

解密工具

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//

package com.wechat.pay.contrib.apache.httpclient.util;

import java.io.IOException;
import java.security.GeneralSecurityException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.Base64;
import javax.crypto.Cipher;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.GCMParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public class AesUtil {
    static final int KEY_LENGTH_BYTE = 32;
    static final int TAG_LENGTH_BIT = 128;
    private final byte[] aesKey;

    public AesUtil(byte[] key) {
        if (key.length != 32) {
            throw new IllegalArgumentException("无效的ApiV3Key，长度必须为32个字节");
        } else {
            this.aesKey = key;
        }
    }

    public String decryptToString(byte[] associatedData, byte[] nonce, String ciphertext) throws GeneralSecurityException, IOException {
        try {
            Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding");
            SecretKeySpec key = new SecretKeySpec(this.aesKey, "AES");
            GCMParameterSpec spec = new GCMParameterSpec(128, nonce);
            cipher.init(2, key, spec);
            cipher.updateAAD(associatedData);
            return new String(cipher.doFinal(Base64.getDecoder().decode(ciphertext)), "utf-8");
        } catch (NoSuchPaddingException | NoSuchAlgorithmException var7) {
            throw new IllegalStateException(var7);
        } catch (InvalidAlgorithmParameterException | InvalidKeyException var8) {
            throw new IllegalArgumentException(var8);
        }
    }
}

pom依赖

<dependency>
            <groupId>com.github.wechatpay-apiv3</groupId>
            <artifactId>wechatpay-apache-httpclient</artifactId>
            <version>0.2.1</version>
 </dependency>