java小程序完成微信支付

偏执的太偏执、 2024-03-31 16:25 34阅读 0赞

[小程序支付开发指引][Link 1]  
https://pay.weixin.qq.com/wiki/doc/apiv3/open/pay/chapter2\_8\_2.shtml

说明：写的比较乱，如果有问题或者不懂的地方，艾特我就行。

#### 创建预支付ID ####

/*
        创建支付信息表
        返回值为：map前端直接调用即可完成支付
    	PlatPay ：这是一个实体类，用来存放调用微信支付所传递的信息，最下面有实体类
    	
        */
        @Override
        @Transactional
        public Map insertPlatPayReturnJson(PlatPay platPay){
       
        
            //工具类
            PayUtils payUtils = new PayUtils();
            //返回给前端的必要参数
            Map<String, Object> map = new HashMap<String, Object>();
            platPay.setCreateTime(DateUtils.getNowDate());
            try {
       
        
                //1、生成预支付ID
                String prepay_id = payUtils.CreateOrder(platPay.getOrderAmount(), platPay.getPayDescription(), platPay.getOpenid(), platPay.getOrderNumber());
                if(ObjectUtils.isEmpty(prepay_id)) {
       
        
                    return map;
                }else {
       
        
                    //2、预支付ID不为空，生成返回值信息
                    map = payUtils.returnToReceptionJson(platPay.getOrderNumber(), prepay_id);
                    //这是自己的逻辑结构了======3、插入支付信息表
                    platPayMapper.insertPlatPay(platPay);
                    //System.out.println("map++++"+map.toString());
                        return map;
                }
            }catch (Exception e){
       
        
                e.printStackTrace();
                return map1;
            }
            }else {
       
        
                return map1;
            }

#### 工具类 ####

package com.ruoyi.common.utils;
    
    import com.fasterxml.jackson.databind.ObjectMapper;
    import com.fasterxml.jackson.databind.node.ObjectNode;
    import com.ruoyi.common.constant.PayConfig;
    import com.wechat.pay.contrib.apache.httpclient.WechatPayHttpClientBuilder;
    import com.wechat.pay.contrib.apache.httpclient.auth.AutoUpdateCertificatesVerifier;
    import com.wechat.pay.contrib.apache.httpclient.auth.PrivateKeySigner;
    import com.wechat.pay.contrib.apache.httpclient.auth.WechatPay2Credentials;
    import com.wechat.pay.contrib.apache.httpclient.auth.WechatPay2Validator;
    import com.wechat.pay.contrib.apache.httpclient.util.PemUtil;
    import org.apache.http.client.methods.CloseableHttpResponse;
    import org.apache.http.client.methods.HttpGet;
    import org.apache.http.client.methods.HttpPost;
    import org.apache.http.client.utils.URIBuilder;
    import org.apache.http.entity.StringEntity;
    import org.apache.http.impl.client.CloseableHttpClient;
    import org.apache.http.util.EntityUtils;
    import org.gavaghan.geodesy.Ellipsoid;
    import org.gavaghan.geodesy.GeodeticCalculator;
    import org.gavaghan.geodesy.GeodeticCurve;
    import org.gavaghan.geodesy.GlobalCoordinates;
    import org.springframework.security.core.parameters.P;
    
    import java.io.ByteArrayInputStream;
    import java.io.ByteArrayOutputStream;
    import java.io.IOException;
    import java.io.UnsupportedEncodingException;
    import java.nio.charset.StandardCharsets;
    import java.nio.file.Files;
    import java.nio.file.Paths;
    import java.security.*;
    import java.security.spec.InvalidKeySpecException;
    import java.security.spec.PKCS8EncodedKeySpec;
    import java.text.SimpleDateFormat;
    import java.util.*;
    
    import org.junit.After;
    import org.junit.Before;
    
    
    /**
     * @author fj
     * @date 2022-09-24 08:54
     * @description 微信支付工具类
     */
    
    public class PayUtils {
       
        
    
    
        /**
         * 获取签名中的方

[Link 1]: https://pay.weixin.qq.com/wiki/doc/apiv3/open/pay/chapter2_8_2.shtml