Java、SpringBoot微信支付(笔记)

m0_62518004

已于 2022-03-15 11:37:30 修改

阅读量409

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文章标签：微信 java spring boot idea

于 2022-03-15 10:07:51 首次发布

原文链接：https://blog.youkuaiyun.com/sinat_36596988/article/details/80011383?utm_medium=distribute.pc_feed_404.none-task-blog-2~default~BlogCommendFromBaidu~Rate-6.control404&depth_1-utm_source=distribute.pc_feed_404.none-task-blog-2~default~BlogCommendFromBaidu~Rate-6.

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转载

https://blog.youkuaiyun.com/sinat_36596988/article/details/80011383https://blog.youkuaiyun.com/sinat_36596988/article/details/80011383

到微信支付官方文档下载SDK

https://pay.weixin.qq.com/wiki/doc/api/micropay.php?chapter=11_1https://pay.weixin.qq.com/wiki/doc/api/micropay.php?chapter=11_1pom.xml

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <!-- web -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>


    <!--    import org.springframework.beans.BeanUtils;     -->
    <!--        <dependency>-->
    <!--            <groupId>org.springframework</groupId>-->
    <!--            <artifactId>spring-beans</artifactId>-->
    <!--            <version>5.3.6</version>-->
    <!--        </dependency>-->

    <!---->
    <!--hutool具包-->
    <dependency>
        <groupId>cn.hutool</groupId>
        <artifactId>hutool-all</artifactId>
        <version>5.4.0</version>
        <scope>compile</scope>
    </dependency>
    <dependency>
        <groupId>org.bouncycastle</groupId>
        <artifactId>bcprov-jdk15on</artifactId>
        <version>1.55</version>
        <scope>compile</scope>
    </dependency>

    <!--    模板引擎    -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
        <version>2.5.6</version>
    </dependency>
    <dependency>
        <groupId>org.thymeleaf</groupId>
        <artifactId>thymeleaf-spring5</artifactId>
    </dependency>
    <!---->

    <dependency>
        <groupId>top.jfunc.json</groupId>
        <artifactId>Json-Gson</artifactId>
        <version>1.0</version>
    </dependency>

    <!-- mybatis-plus -->
    <dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus-boot-starter</artifactId>
        <version>3.3.1</version>
    </dependency>

    <!-- mysql -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <scope>runtime</scope>
    </dependency>

    <!-- lombok -->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.4</version>
    </dependency>

    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>2.1.4</version>
    </dependency>
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.2.76</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-aop</artifactId>
    </dependency>

    <!--redis-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-redis</artifactId>
    </dependency>
    <!--jedis  -->
    <dependency>
        <groupId>redis.clients</groupId>
        <artifactId>jedis</artifactId>
        <version>2.9.0</version>
    </dependency>
    <!-- druid -->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid-spring-boot-starter</artifactId>
        <version>1.1.17</version>
    </dependency>

    <!-- fastjson -->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.2.58</version>
    </dependency>

    <!--        common-->
    <dependency>
        <groupId>commons-io</groupId>
        <artifactId>commons-io</artifactId>
        <version>2.8.0</version>
    </dependency>

    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.2.76</version>
    </dependency>

    <!-- 阿里云oss依赖 -->
    <dependency>
        <groupId>com.aliyun.oss</groupId>
        <artifactId>aliyun-sdk-oss</artifactId>
        <version>3.1.0</version>
    </dependency>
    <!--    文件上传    -->
    <dependency>
        <groupId>commons-fileupload</groupId>
        <artifactId>commons-fileupload</artifactId>
        <version>1.3.1</version>
    </dependency>
    <!--excel导入导出-->
    <dependency>
        <groupId>cn.afterturn</groupId>
        <artifactId>easypoi-web</artifactId>
        <version>4.0.0</version>
    </dependency>
    <dependency>
        <groupId>org.jodconverter</groupId>
        <artifactId>jodconverter-core</artifactId>
        <version>4.2.2</version>
    </dependency>
    <dependency>
        <groupId>org.jodconverter</groupId>
        <artifactId>jodconverter-local</artifactId>
        <version>4.2.2</version>
    </dependency>
    <!--jodconverter 核心包 -->
    <dependency>
        <groupId>org.jodconverter</groupId>
        <artifactId>jodconverter-core</artifactId>
        <version>4.2.2</version>
    </dependency>
    <!--jodconverter 本地支持包 -->
    <dependency>
        <groupId>org.jodconverter</groupId>
        <artifactId>jodconverter-local</artifactId>
        <version>4.2.2</version>
    </dependency>

    <!--    代码生成器 依赖    -->
    <dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus-generator</artifactId>
        <version>3.0.5</version>
    </dependency>
    <dependency>
        <groupId>org.freemarker</groupId>
        <artifactId>freemarker</artifactId>
        <version>2.3.30</version>
    </dependency>

    <!--   swagger2   -->
    <!-- https://mvnrepository.com/artifact/io.springfox/springfox-swagger2 -->
    <dependency>
        <groupId>io.springfox</groupId>
        <artifactId>springfox-swagger2</artifactId>
        <version>2.9.2</version>
    </dependency>


    <!-- https://mvnrepository.com/artifact/io.springfox/springfox-swagger-ui -->
    <dependency>
        <groupId>io.springfox</groupId>
        <artifactId>springfox-swagger-ui</artifactId>
        <version>2.9.2</version>
    </dependency>
    <dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus-extension</artifactId>
        <version>3.3.0</version>
    </dependency>

    <!--    jackson-->
    <!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.2.76</version>
    </dependency>


    <!-- https://mvnrepository.com/artifact/commons-beanutils/commons-beanutils -->
    <dependency>
        <groupId>commons-beanutils</groupId>
        <artifactId>commons-beanutils</artifactId>
        <version>1.9.3</version>
    </dependency>


    <!-- https://mvnrepository.com/artifact/commons-collections/commons-collections -->
    <dependency>
        <groupId>commons-collections</groupId>
        <artifactId>commons-collections</artifactId>
        <version>3.2.1</version>
    </dependency>


    <!-- https://mvnrepository.com/artifact/commons-lang/commons-lang -->
    <dependency>
        <groupId>commons-lang</groupId>
        <artifactId>commons-lang</artifactId>
        <version>2.6</version>
    </dependency>


    <!-- https://mvnrepository.com/artifact/commons-logging/commons-logging -->
    <dependency>
        <groupId>commons-logging</groupId>
        <artifactId>commons-logging</artifactId>
        <version>1.1.1</version>
    </dependency>


    <!-- https://mvnrepository.com/artifact/net.sf.ezmorph/ezmorph -->
    <dependency>
        <groupId>net.sf.ezmorph</groupId>
        <artifactId>ezmorph</artifactId>
        <version>1.0.6</version>
    </dependency>

    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.7.21</version>
    </dependency>

    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-simple</artifactId>
        <version>1.7.21</version>
    </dependency>

    <!--base64加密解密-->
    <!--shiro依赖和缓存-->
    <dependency>
        <groupId>org.apache.shiro</groupId>
        <artifactId>shiro-core</artifactId>
        <version>1.4.0</version>
        <exclusions>
            <exclusion>
                <artifactId>slf4j-api</artifactId>
                <groupId>org.slf4j</groupId>
            </exclusion>
        </exclusions>
    </dependency>
    <!-- fastjson -->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.2.47</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/net.sf.json-lib/json-lib -->
    <dependency>
        <groupId>net.sf.json-lib</groupId>
        <artifactId>json-lib</artifactId>
        <version>2.4</version>
        <classifier>jdk15</classifier>
    </dependency>
    <!--解码-->
    <dependency>
        <groupId>org.bouncycastle</groupId>
        <artifactId>bcprov-jdk15on</artifactId>
        <version>1.57</version>
    </dependency>
    <dependency>
        <groupId>org.bouncycastle</groupId>
        <artifactId>bcprov-jdk15on</artifactId>
        <version>1.57</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/commons-codec/commons-codec -->
    <dependency>
        <groupId>commons-codec</groupId>
        <artifactId>commons-codec</artifactId>
        <version>1.15</version>
    </dependency>

    <dependency>
        <groupId>net.sf.json-lib</groupId>
        <artifactId>json-lib</artifactId>
        <version>2.4</version>
        <classifier>jdk15</classifier><!-- 指定jdk版本 -->
    </dependency>

    <!--        JSON　　　　-->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.2.76</version>
    </dependency>


    <dependency>
        <groupId>net.sf.json-lib</groupId>
        <artifactId>json-lib</artifactId>
        <version>2.4</version>
        <classifier>jdk15</classifier>
    </dependency>

    <dependency>
        <groupId>org.json</groupId>
        <artifactId>json</artifactId>
        <version>20160810</version>
    </dependency>

    <dependency>
        <groupId>com.google.code.gson</groupId>
        <artifactId>gson</artifactId>
        <version>2.8.2</version>
    </dependency>
    <!--        httpGet     -->
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
        <version>4.5.2</version>
    </dependency>
    <!--        httpGet     -->
    <dependency>
        <groupId>commons-httpclient</groupId>
        <artifactId>commons-httpclient</artifactId>
        <version>3.1</version>
    </dependency>


    <dependency>
        <groupId>com.github.binarywang</groupId>
        <artifactId>weixin-java-miniapp</artifactId>
        <version>2.9.0</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-configuration-processor</artifactId>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>redis.clients</groupId>
        <artifactId>jedis</artifactId>
    </dependency>
    <!--        增加微信sdk    -->
    <!--        <dependency>-->
    <!--            <groupId>com.github.wxpay</groupId>-->
    <!--            <artifactId>wxpay-sdk</artifactId>-->
    <!--            <version>0.0.3</version>-->
    <!--        </dependency>-->

    <dependency>
        <groupId>com.github.wxpay</groupId>
        <artifactId>wxpay-sdk</artifactId>
        <version>0.0.3</version>
    </dependency>
    <dependency>
        <groupId>commons-logging</groupId>
        <artifactId>commons-logging</artifactId>
        <version>1.2</version>
    </dependency>

</dependencies>

微信支付帮助类

package com.peng.logistics.wxzf;


import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.URLConnection;
public class HttpUtil {
    //private static final Log logger = Logs.get();
    private final static int CONNECT_TIMEOUT = 5000; // in milliseconds
    private final static String DEFAULT_ENCODING = "UTF-8";

    public static String postData(String urlStr, String data){
        return postData(urlStr, data, null);
    }

    public static String postData(String urlStr, String data, String contentType){
        BufferedReader reader = null;
        try {
            URL url = new URL(urlStr);
            URLConnection conn = url.openConnection();
            conn.setDoOutput(true);
            conn.setConnectTimeout(CONNECT_TIMEOUT);
            conn.setReadTimeout(CONNECT_TIMEOUT);
            if(contentType != null)
                conn.setRequestProperty("content-type", contentType);
            OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream(), DEFAULT_ENCODING);
            if(data == null)
                data = "";
            writer.write(data);
            writer.flush();
            writer.close();

            reader = new BufferedReader(new InputStreamReader(conn.getInputStream(), DEFAULT_ENCODING));
            StringBuilder sb = new StringBuilder();
            String line = null;
            while ((line = reader.readLine()) != null) {
                sb.append(line);
                sb.append("\r\n");
            }
            return sb.toString();
        } catch (IOException e) {
            //logger.error("Error connecting to " + urlStr + ": " + e.getMessage());
        } finally {
            try {
                if (reader != null)
                    reader.close();
            } catch (IOException e) {
            }
        }
        return null;
    }

}

package com.peng.logistics.wxzf;

import java.security.MessageDigest;

public class MD5 {


    private static String byteArrayToHexString(byte b[]) {
        StringBuffer resultSb = new StringBuffer();
        for (int i = 0; i < b.length; i++)
            resultSb.append(byteToHexString(b[i]));

        return resultSb.toString();
    }

    private static String byteToHexString(byte b) {
        int n = b;
        if (n < 0)
            n += 256;
        int d1 = n / 16;
        int d2 = n % 16;
        return hexDigits[d1] + hexDigits[d2];
    }

    public static String MD5Encode(String origin, String charsetname) {
        String resultString = null;
        try {
            resultString = new String(origin);
            MessageDigest md = MessageDigest.getInstance("MD5");
            if (charsetname == null || "".equals(charsetname))
                resultString = byteArrayToHexString(md.digest(resultString
                        .getBytes()));
            else
                resultString = byteArrayToHexString(md.digest(resultString
                        .getBytes(charsetname)));
        } catch (Exception exception) {
        }
        return resultString;
    }

    private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5",
            "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };

}

package com.peng.logistics.wxzf;

import java.util.Date;

public class MyExceptionOutLog {
    public static String outLog(Exception e) {
        String error = "";
        StackTraceElement[] st = e.getStackTrace();
        for (StackTraceElement stackTraceElement : st) {
            String exclass = stackTraceElement.getClassName();
            String method = stackTraceElement.getMethodName();
            /*new Date() + ":" + */
            error += "\t[类:" + exclass + "]调用"
                    + method + "时在第" + stackTraceElement.getLineNumber()
                    + "行代码处发生异常!\n\t\t\t异常类型:" + e.getClass().getName()
                    + "\n\t\t异常信息为:"+ e.toString()+"\n";
        }

        return error;
    }
}

package com.peng.logistics.wxzf;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.SortedMap;

public class PayCommonUtil {
    /**
     * 是否签名正确,规则是:按参数名称a-z排序,遇到空值的参数不参加签名。
     * @return boolean
     */
    public static boolean isTenpaySign(String characterEncoding, SortedMap<Object, Object> packageParams, String API_KEY) {
        StringBuffer sb = new StringBuffer();
        Set es = packageParams.entrySet();
        Iterator it = es.iterator();
        while(it.hasNext()) {
            Map.Entry entry = (Map.Entry)it.next();
            String k = (String)entry.getKey();
            String v = (String)entry.getValue();
            if(!"sign".equals(k) && null != v && !"".equals(v)) {
                sb.append(k + "=" + v + "&");
            }
        }

        sb.append("key=" + API_KEY);

        //算出摘要
        String mysign = MD5.MD5Encode(sb.toString(), characterEncoding).toLowerCase();
        String tenpaySign = ((String)packageParams.get("sign")).toLowerCase();

        //System.out.println(tenpaySign + "    " + mysign);
        return tenpaySign.equals(mysign);
    }

    /**
     * @author
     * @Description：sign签名
     * @param characterEncoding
     *            编码格式
     * @param packageParams
     *            请求参数
     * @return
     */
    public static String createSign(String characterEncoding, SortedMap<Object, Object> packageParams, String API_KEY) {
        StringBuffer sb = new StringBuffer();
        Set es = packageParams.entrySet();
        Iterator it = es.iterator();
        while (it.hasNext()) {
            Map.Entry entry = (Map.Entry) it.next();
            String k = entry.getKey().toString();
            String v = entry.getValue().toString();
            if (null != v && !"".equals(v) && !"sign".equals(k) && !"key".equals(k)) {
                sb.append(k + "=" + v + "&");
            }
        }
        sb.append("key=" + API_KEY);
        String sign = MD5.MD5Encode(sb.toString(), characterEncoding).toUpperCase();
        return sign;
    }
    public static String createLinkString(Map<String, String> params) {
        List<String> keys = new ArrayList<String>(params.keySet());
        Collections.sort(keys);
        String prestr = "";
        for (int i = 0; i < keys.size(); i++) {
            String key = keys.get(i);
            String value = params.get(key);
            if (i == keys.size() - 1) {// 拼接时，不包括最后一个&字符
                prestr = prestr + key + "=" + value;
            } else {
                prestr = prestr + key + "=" + value + "&";
            }
        }
        return prestr;
    }
    /**
     * @author
     * @Description：将请求参数转换为xml格式的string
     * @param parameters
     *            请求参数
     * @return
     */
    public static String getRequestXml(SortedMap<Object, Object> parameters) {
        StringBuffer sb = new StringBuffer();
        sb.append("<xml>");
        Set es = parameters.entrySet();
        Iterator it = es.iterator();
        while (it.hasNext()) {
            Map.Entry entry = (Map.Entry) it.next();
            String k = entry.getKey().toString();
            String v = entry.getValue().toString();
            if ("attach".equalsIgnoreCase(k) || "body".equalsIgnoreCase(k) || "sign".equalsIgnoreCase(k)) {
                sb.append("<" + k + ">"  + v + "</" + k + ">");
            } else {
                sb.append("<" + k + ">" + v + "</" + k + ">");
            }
        }
        sb.append("</xml>");
        return sb.toString();
    }

    /**
     * 取出一个指定长度大小的随机正整数.
     *
     * @param length
     *            int 设定所取出随机数的长度。length小于11
     * @return int 返回生成的随机数。
     */
    public static int buildRandom(int length) {
        int num = 1;
        double random = Math.random();
        if (random < 0.1) {
            random = random + 0.1;
        }
        for (int i = 0; i < length; i++) {
            num = num * 10;
        }
        return (int) ((random * num));
    }

    /**
     * 获取当前时间 yyyyMMddHHmmss
     *
     * @return String
     */
    public static String getCurrTime() {
        Date now = new Date();
        SimpleDateFormat outFormat = new SimpleDateFormat("yyyyMMddHHmmss");
        String s = outFormat.format(now);
        return s;
    }

    public static boolean verify(String text, String sign, String key, String input_charset) {
        text = text + key;
        String mysign =MD5.MD5Encode(text, input_charset).toUpperCase();
        System.out.println(mysign);	System.out.println(mysign);	System.out.println(mysign);	System.out.println(mysign);
        if (mysign.equals(sign)) {
            return true;
        } else {
            return false;
        }
    }

}


package com.peng.logistics.wxzf;

import java.beans.Transient;
import java.util.HashMap;
import java.util.Map;


public class TransfersDto
{
    // 与商户号关联应用(如微信公众号/小程序)的APPID
    private String mch_appid;

    // 微信支付分配的商户号
    private String mchid;
    
    // 商户名称, 如'XXX服务号'
    private String mch_name;

    // 商户订单号，需保持唯一性(只能是字母或者数字，不能包含有其他字符)
    private String partner_trade_no;

    // 商户appid下，某用户的openid
    private String openid;

    // NO_CHECK：不校验真实姓名 FORCE_CHECK：强校验真实姓名
    private String check_name = "NO_CHECK";

    // 企业付款金额，单位为元
    private int amount;
    
    // 随机字符串，不长于32位
    private String nonce_str;

    // 企业付款备注
    private String desc;
    
    private String appkey;

    // 发起者IP地址+该IP可传用户端或者服务端的IP。
    private String spbill_create_ip = "127.0.0.1";

    public String getMch_appid()
    {
        return mch_appid;
    }

    public void setMch_appid(String mch_appid)
    {
        this.mch_appid = mch_appid;
    }

    public String getMchid()
    {
        return mchid;
    }

    /**
     * 与商户号关联应用(如微信公众号/小程序)的APPID
     */
    public void setMchid(String mchid)
    {
        this.mchid = mchid;
    }
    
    public String getPartner_trade_no()
    {
        return partner_trade_no;
    }

    public void setPartner_trade_no(String partner_trade_no)
    {
        this.partner_trade_no = partner_trade_no;
    }

    public String getOpenid()
    {
        return openid;
    }

    public void setOpenid(String openid)
    {
        this.openid = openid;
    }
    
    public String getCheck_name()
    {
        return check_name;
    }

    public int getAmount()
    {
        return amount;
    }

    /**
     * 为了方便理解+这里接收的单位是元+会自动转换为分传给微信支付后台
     */
    public void setAmount(double amount)
    {
        this.amount = (int)(amount * 100);
    }
    
    public String getNonce_str()
    {
        return nonce_str;
    }

    public void setNonce_str(String nonce_str)
    {
        this.nonce_str = nonce_str;
    }

    public String getDesc()
    {
        return desc;
    }

    public void setDesc(String desc)
    {
        this.desc = desc;
    }

    public String getAppkey()
    {
        return appkey;
    }

    public void setAppkey(String appkey)
    {
        this.appkey = appkey;
    }

    public String getSpbill_create_ip()
    {
        return spbill_create_ip;
    }

    public void setSpbill_create_ip(String spbill_create_ip)
    {
        this.spbill_create_ip = spbill_create_ip;
    }
    
    public String getMch_name()
    {
        return mch_name;
    }

    public void setMch_name(String mch_name)
    {
        this.mch_name = mch_name;
    }
    
    @Transient
    public Map<String, String> map()
    {
        Map<String, String> map = new HashMap<String, String>();
        map.put("mch_appid", this.mch_appid);
        map.put("mchid", this.mchid);
        map.put("mch_name", this.mch_name);
        map.put("openid", this.openid);
        map.put("amount", String.valueOf(this.amount));
        map.put("desc", this.desc);
        map.put("appkey", this.appkey);
        map.put("nonce_str", this.nonce_str);
        map.put("partner_trade_no", this.partner_trade_no);
        map.put("spbill_create_ip", this.spbill_create_ip);
        return map;
    }

    @Override
    public String toString()
    {
        StringBuilder sb = new StringBuilder();
        sb.append("[mch_appid]" + this.mch_appid);
        sb.append(",[mchid]" + this.mchid);
        sb.append(",[openid]" + this.openid);
        sb.append(",[amount]" + this.amount);
        sb.append(",[desc]" + this.desc);
        sb.append(",[partner_trade_no]" + this.partner_trade_no);
        sb.append(",[nonce_str]" + this.nonce_str);
        sb.append(",[spbill_create_ip]" + this.spbill_create_ip);
        sb.append(",[check_name]" + this.check_name);
        return sb.toString();
    }
}

package com.peng.logistics.wxzf;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;

public class XMLUtil {

    public static Map doXMLParse(String strxml) throws Exception {
        strxml = strxml.replaceFirst("encoding=\".*\"", "encoding=\"UTF-8\"");

        if (null == strxml || "".equals(strxml)) {
            return null;
        }

        Map m = new HashMap();

        InputStream in = new ByteArrayInputStream(strxml.getBytes("UTF-8"));
        SAXBuilder builder = new SAXBuilder();
        Document doc = builder.build(in);
        Element root = doc.getRootElement();
        List list = root.getChildren();
        Iterator it = list.iterator();
        while (it.hasNext()) {
            Element e = (Element) it.next();
            String k = e.getName();
            String v = "";
            List children = e.getChildren();
            if (children.isEmpty()) {
                v = e.getTextNormalize();
            } else {
                v = XMLUtil.getChildrenText(children);
            }

            m.put(k, v);
        }

        //关闭流
        in.close();

        return m;
    }

    /**
     * 获取子结点的xml
     *
     * @param children
     * @return String
     */
    public static String getChildrenText(List children) {
        StringBuffer sb = new StringBuffer();
        if (!children.isEmpty()) {
            Iterator it = children.iterator();
            while (it.hasNext()) {
                Element e = (Element) it.next();
                String name = e.getName();
                String value = e.getTextNormalize();
                List list = e.getChildren();
                sb.append("<" + name + ">");
                if (!list.isEmpty()) {
                    sb.append(XMLUtil.getChildrenText(list));
                }
                sb.append(value);
                sb.append("</" + name + ">");
            }
        }

        return sb.toString();
    }
}

调用

小程序端

   pay: function (e) {
    //获取金额
  
	
    //获取微信id
    var openid = wx.getStorageSync("open_id");
    //下订单并唤起微信支付
  var that = this ;
  let data ={
     openid:openid,
    price:0.1*10,
    title:'订单名称',
    goodsid:100
  }
  let data2 = JSON.stringify(data)
    wx.request({
      url:'https://letengh5.com:7000/order/returnparam',
      data: {
        'openid':openid,
        'price':0.1*10,//付款金额
        'title':'订单名称',
        'goodsid':100,
        'orderFormId':10622,//订单编号
        'userId':10014,//用户ID
        'accountPayable':100,//没有用优惠劵
        'discountCouponId':0
      },
      method: "POST",
      // headers: {
      //   'Content-Type': 'multipart/form-data'
      // },
      header: { 'content-type': 'application/x-www-form-urlencoded' },
      success: function (res) {
        console.log(res)
          //客户单发起微信请求
         wx.requestPayment(
           {
            'appId': res.data.appid,
            'timeStamp': res.data.timeStamp,
            'nonceStr': res.data.nonceStr,
            'package': res.data.package,
            'signType': 'MD5',
            'paySign': res.data.paySign,
            'success': function (res) {
              // errMsg: "requestPayment:ok"
						wx.showToast({
							  title: '支付成功',
							  duration: 1200
							})
              console.log('支付成功',res);

			  
			  //这里完成跳转
 
            },
            'fail': function (res) {
				if(res.errMsg=="requestPayment:fail cancel"){
					wx.showToast({
								  title: '支付取消',
								  duration: 1200
					})
					
				}else{
					  wx.showToast({
								  title: '支付失败',
								  // image: '../../images/error.png',
								  duration: 1200
					})
				}
				
				//支付失败
                console.log(res);
            },
            'complete': function (res) { }
          })
 
      }
    })
 
 
  }

Java后端

package com.peng.logistics.controller;

import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.*;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.alibaba.fastjson.JSON;
import com.peng.logistics.mapper.*;
import com.peng.logistics.ov.resp.PayResp;
import com.peng.logistics.wxzf.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.google.gson.Gson;


@Controller
@RequestMapping("order")
public class OrderController {

    @Autowired
    private OrderFormMapper orderFormMapper;

    @Autowired
    private ReceiptMapper receiptMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private IncomeMapper incomeMapper;

    @Autowired
    private DiscountCouponMapper discountCouponMapper;

    /*
     * 购买 支付
     * @param request
     * @param response
     * @return
     * */
    @ResponseBody
    @RequestMapping("/returnparam")
    public void doOrder(HttpServletRequest request, HttpServletResponse response) throws Exception {
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        //得到openid（微信用户唯一的openid）
        String openid = request.getParameter("openid");
        //得到价钱（自定义）
        int fee = 0;
        if (null != request.getParameter("price")) {
            fee = Integer.parseInt(request.getParameter("price").toString());
        }
        //得到商品的ID（自定义）
        String goodsid = request.getParameter("goodsid");
        //订单标题（自定义）
        String title = request.getParameter("title");
        //时间戳
        String times = System.currentTimeMillis() + "";

        //应收款
        String accountPayable = request.getParameter("accountPayable");

        //优惠劵ID
        String discountCouponId = request.getParameter("discountCouponId");

        //用户ID
        String userId = request.getParameter("userId");

        //订单ID
        String orderFormId = request.getParameter("orderFormId");

        //订单编号（自定义 这里以时间戳+随机数）
        Random random = new Random();
        String did = times + random.nextInt(1000);
//
//        Map attach = new HashMap();
//        attach.put("orderFormId", orderFormId);//订单号
//        attach.put("userId", userId);//用户ID
//        attach.put("accountPayable", accountPayable);//应收款
//        attach.put("discountCouponId", discountCouponId);//优惠劵ID

        PayResp payResp = new PayResp();
        payResp.setOrderFormId(Integer.valueOf(orderFormId));
        payResp.setUserId(Integer.valueOf(userId));
        payResp.setAccountPayable(Integer.valueOf(accountPayable));
        payResp.setDiscountCouponId(Integer.valueOf(discountCouponId));

        String attach = JSON.toJSONString(payResp);

        //支付成功后调用的参数
        SortedMap<Object, Object> packageParams = new TreeMap<Object, Object>();
        packageParams.put("appid", "");//微信小程序ID
        packageParams.put("mch_id", "");//商户ID
        packageParams.put("nonce_str", times);//随机字符串（32位以内） 这里使用时间戳
        packageParams.put("body", title);//支付主体名称 自定义
        packageParams.put("out_trade_no", did + goodsid);//编号 自定义以时间戳+随机数+商品ID
        packageParams.put("attach", attach);//追加数据(支付成功会把该数据追加到支付成功返回的数据)
        packageParams.put("total_fee", fee);//价格 自定义

//        packageParams.put("spbill_create_ip", remoteAddr);
        packageParams.put("notify_url", "");//支付返回地址要外网访问的到， localhost不行，调用下面buy方法。（订单存入数据库）
        packageParams.put("trade_type", "JSAPI");//这个api有，固定的
        packageParams.put("openid", openid);//用户的openid 可以要 可以不要

        //获取sign
        String sign = PayCommonUtil.createSign("UTF-8", packageParams, "");//最后这个是自己在微信商户设置的32位密钥
        packageParams.put("sign", sign);
        //转成XML
        String requestXML = PayCommonUtil.getRequestXml(packageParams);
        //得到含有prepay_id的XML
        String resXml = HttpUtil.postData("https://api.mch.weixin.qq.com/pay/unifiedorder", requestXML);
        //解析XML存入Map
        Map map = XMLUtil.doXMLParse(resXml);
        // String return_code = (String) map.get("return_code");
        //得到prepay_id
        String prepay_id = (String) map.get("prepay_id");
        SortedMap<Object, Object> packageP = new TreeMap<Object, Object>();
        packageP.put("appId", "");//！！！注意，这里是appId,上面是appid
        packageP.put("nonceStr", times);//时间戳
        packageP.put("package", "prepay_id=" + prepay_id);//必须把package写成 "prepay_id="+prepay_id这种形式
        packageP.put("signType", "MD5");//paySign加密
        packageP.put("timeStamp", (System.currentTimeMillis() / 1000) + "");


        //得到paySign
        String paySign = PayCommonUtil.createSign("UTF-8", packageP, "leteng1302sudaweixizhifu20220207");//微信支付AIP的KEY
        packageP.put("paySign", paySign);
        //将packageP数据返回给小程序
        Gson gson = new Gson();
        String json = gson.toJson(packageP);
        PrintWriter pw = response.getWriter();
        pw.write(json);
        pw.close();
    }

    //订单存入数据库  上面参数 packageParams.put("notify_url", "http://你的IP地址/order/buy.action");回调的就是这个方法
    @RequestMapping(value = "/buy")
    @ResponseBody
    public void Buy(HttpServletRequest request, HttpServletResponse response) throws Exception {

        BufferedReader br = new BufferedReader(new InputStreamReader((ServletInputStream) request.getInputStream()));
        String line = null;
        StringBuilder sb = new StringBuilder();
        while ((line = br.readLine()) != null) {
            sb.append(line);
        }
        br.close();
        //sb为微信返回的xml
        String notityXml = sb.toString();
        String resXml = "";
        Map map = XMLUtil.doXMLParse(notityXml);
        String returnCode = (String) map.get("return_code");

        System.err.println("------------" + map);
/*

*/

        if ("SUCCESS".equals(returnCode)) {
             PayResp payResp = JSONObject.parseObject(map.get("attach").toString(), PayResp.class);
//            MySql   操作数据库

            resXml = "<xml>" + "<return_code><![CDATA[SUCCESS]]></return_code>"
                    + "<return_msg><![CDATA[OK]]></return_msg>" + "</xml> ";
        } else {
            resXml = "<xml>" + "<return_code><![CDATA[FAIL]]></return_code>"
                    + "<return_msg><![CDATA[报文为空]]></return_msg>" + "</xml> ";
        }
        BufferedOutputStream out = new BufferedOutputStream(
                response.getOutputStream());
        out.write(resXml.getBytes());
        out.flush();
        out.close();

    }
}