刚起手学习小程序2周，微信支付也是花了4天，今天第4天做完了代码这块分享下自己的学习成果。
我的框架是springboot mybatis mysql 前端主流用vue 框架不是我搭建的，是分模块的，有1个自己的核心jar 和页面外层的jar
说点能够通用的 这里微信支付需要用到的jar
com.thoughtworks.xstream
xstream
1.4.10
com.squareup.retrofit2
retrofit
2.3.0
com.squareup.retrofit2
converter-simplexml
2.3.0
com.squareup.okhttp3
okhttp
3.2.0
org.bouncycastle
bcprov-jdk15on
1.60
上面的jar有okhttp请求 加密解密 xml转换的
项目目录结构 方便大家更明显的感受
image
接下来是先发2个公共的文件
* * *
**1.WxPayUtils.java**
package com.alpha.modules.wxpay.utils;
import java.io.Writer;
import java.lang.reflect.Field;
import java.math.BigDecimal;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;
import java.util.Random;
import java.util.SortedMap;
import java.util.TreeMap;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.lang3.StringUtils;
import org.simpleframework.xml.Element;
import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.annotations.XStreamAlias;
import com.thoughtworks.xstream.core.util.QuickWriter;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
import com.thoughtworks.xstream.io.naming.NoNameCoder;
import com.thoughtworks.xstream.io.xml.PrettyPrintWriter;
import com.thoughtworks.xstream.io.xml.XppDriver;
/**
* @Author: Temple
* @Description: Xml-Object 转换
* @Date: 2018年12月17日 11:33:21
*/
public class WxPayUtils {
public static final String ALL_CHAR = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
public static final String LETTER_CHAR = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
public static final String NUMBER_CHAR = "0123456789";
public static final Random RANDOM = new Random();
public static final SimpleDateFormat SIMPLE_DATE_FORMAT = new SimpleDateFormat("yyyyMMddHHmmss");
/**
* 生成指定长度的随机字符串（包含数字和字母）
*
* @param length
* 随机字符串长度
* @return
*/
public static String getRandomStr(Integer length) {
StringBuilder builder = new StringBuilder();
for (int i = 0; i < length; i++) {
builder.append(ALL_CHAR.charAt(RANDOM.nextInt(ALL_CHAR.length())));
}
return builder.toString();
}
/**
* 生成指定长度的随即纯数字字符串
*
* @param length
* 随即字符串长度
* @return
*/
public static String getRandomNum(Integer length) {
StringBuilder builder = new StringBuilder();
for (int i = 0; i < length; i++) {
builder.append(NUMBER_CHAR.charAt(RANDOM.nextInt(NUMBER_CHAR.length())));
}
return builder.toString();
}
/**
* 生成随即纯字母字符串
*
* @param length
* 随即字符串长度
* @return
*/
public static String getRandomLetter(Integer length) {
StringBuilder builder = new StringBuilder();
for (int i = 0; i < length; i++) {
builder.append(LETTER_CHAR.charAt(RANDOM.nextInt(LETTER_CHAR.length())));
}
return builder.toString();
}
/**
* 获取随机订单号（系统当前时间+随机数字字符串）
*
* @return
*/
public static String getTradeNo() {
StringBuilder builder = new StringBuilder();
Date date = new Date();
builder.append(SIMPLE_DATE_FORMAT.format(date)).append(getRandomNum(17));
return builder.toString();
}
private static XStream xStream = new XStream(new XppDriver(new NoNameCoder()) {
@Override
public HierarchicalStreamWriter createWriter(Writer out) {
return new PrettyPrintWriter(out) {
// 对所有xml节点的转换都增加CDATA标记
// boolean cdata = true;
boolean cdata = false;
@Override
@SuppressWarnings("rawtypes")
public void startNode(String name, Class clazz) {
super.startNode(name, clazz);
}
//// 当对象属性带下划线时，XStream会转换成双下划线，
// 重写这个方法，不再像XppDriver那样调用nameCoder来进行编译，而是直接返回节点名称，避免双下划线出现
@Override
public String encodeNode(String name) {
return name;
}
@Override
protected void writeText(QuickWriter writer, String text) {
if (cdata) {
writer.write("");
} else {
writer.write(text);
}
}
};
}
});
/**
* 对象转xml
*
* @param obj
* @return
*/
public static String objToXML(Object obj) {
// 使用注解设置别名必须在使用之前加上注解类才有作用
xStream.processAnnotations(obj.getClass());
return xStream.toXML(obj);
}
public static Object xmlToObj(String xml, Class objClass) {
Serializer serializer = new Persister();
try {
return serializer.read(objClass, xml);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 签名-MD5
*
* @param signMap
* 待签名Map
* @param key
* 密钥
* @return MD5
*/
public static String signByMD5(Map signMap, String key) {
SortedMap sortedMap = new TreeMap(signMap);
StringBuilder builder = new StringBuilder();
for (Map.Entry entry : sortedMap.entrySet()) {
String mapKey = entry.getKey();
if (!mapKey.equals("sign") && !mapKey.equals("key") && StringUtils.isNotBlank(entry.getValue())) {
builder.append(entry.getKey()).append("=").append(entry.getValue()).append("&");
}
}
builder.append("key=").append(key);
return DigestUtils.md5Hex(builder.toString()).toUpperCase();
}
/**
* 签名-MD5
*
* @param signObj
* 待签名对象
* @param key
* 密钥
* @return
*/
public static String signByMD5(Object signObj, String key) throws IllegalAccessException {
SortedMap sortedMap = new TreeMap();
StringBuilder builder = new StringBuilder();
Class clazz = signObj.getClass();
Field[] fields = clazz.getDeclaredFields(); // 反射回去对象所有字段，包括私有字段
for (Field field : fields) {
field.setAccessible(true);
if (field.get(signObj) != null) {
String name = field.getName();
XStreamAlias anno = field.getAnnotation(XStreamAlias.class); // 若字段上含有@XStreamAlias注解，则参数名取注解值
Element eleAnno = field.getAnnotation(Element.class); // 若字段上含有@Element注解，则参数名取注解值
if (anno != null) {
name = anno.value();
}
if (eleAnno != null) {
name = eleAnno.name();
}
sortedMap.put(name, field.get(signObj).toString());
}
}
for (Map.Entry entry : sortedMap.entrySet()) {
String mapKey = entry.getKey();
if (!mapKey.equals("sign") && !mapKey.equals("key") && StringUtils.isNotBlank(entry.getValue())) {
builder.append(mapKey).append("=").append(entry.getValue()).append("&");
}
}
builder.append("key=").append(key);
return DigestUtils.md5Hex(builder.toString()).toUpperCase();
}
/**
* 圆转分
* @param amount 圆单位金额
* @return
*/
public static Integer yuanToFen(BigDecimal amount) {
return amount.movePointRight(2).intValue();
}
/**
* 分转圆
* @param amount 分单位金额
* @return
*/
public static Double fenToYuan(BigDecimal amount) {
return amount.movePointLeft(2).doubleValue();
}
/**
* 获取ip地址
* @param request
* @return
*/
public static String getIpAddr() {
InetAddress addr = null;
try {
addr= InetAddress.getLocalHost();
String localip=addr.getHostAddress();
return localip;
} catch (UnknownHostException e) {
return null;
}
}
public static String returnXML(String return_code) {
return " WxConfigure.java
package com.alpha.modules.wxpay.utils;
import com.alpha.common.utils.FileUtils;
public class WxConfigure {
//小程序ID
private static String appID = "wx***";
//小程序secret
private static String secret = "83**";
//商户号
private static String mch_id = "**";
//商户密钥
private static String key = "***";
//支付回调地址
private static String payNotifyUrl="http://***/app/payNotifyUrl";
//退款回调地址
private static String refundNotifyUrl="http://***/app/refundNotifyUrl";
//证书
private static String certPath=FileUtils.getAbsolutePath("certificate/")+"apiclient_cert.p12";
public static String getSecret() {
return secret;
}
public static void setSecret(String secret) {
WxConfigure.secret = secret;
}
public static String getKey() {
return key;
}
public static void setKey(String key) {
WxConfigure.key = key;
}
public static String getAppID() {
return appID;
}
public static void setAppID(String appID) {
WxConfigure.appID = appID;
}
public static String getMch_id() {
return mch_id;
}
public static void setMch_id(String mch_id) {
WxConfigure.mch_id = mch_id;
}
public static String getPayNotifyUrl() {
return payNotifyUrl;
}
public static void setPayNotifyUrl(String payNotifyUrl) {
WxConfigure.payNotifyUrl = payNotifyUrl;
}
public static String getRefundNotifyUrl() {
return refundNotifyUrl;
}
public static void setRefundNotifyUrl(String refundNotifyUrl) {
WxConfigure.refundNotifyUrl = refundNotifyUrl;
}
public static String getCertPath() {
return certPath;
}
public static void setCertPath(String certPath) {
WxConfigure.certPath = certPath;
}
}
上面一写配置自己可以考虑写在yml文件里面，目前我先简单的这样写，域名我是用花生壳的，可以用免费的也可以自己买便宜的2级域名，然后本地调试需要花钱内穿实现通过域名访问本地程序，不懂可以私密我，需要的多的我可以单独写一篇内穿的玩法。
接下来会分享核心代码了，就行把封装的更新下，开始更新
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