【微信支付】小案例，Java版

微信支付的简单实现案例（Java）

上手一个小案例，实现Java版本的微信支付。

第一步: 从微信平台下载微信支付demo。
链接: 到官方下载
这里我们下载Java版的。
注意微信提供的demo是myclipse版本的。
我们要用myclipse打开。

第二步：把demo导入到myclipse中去。

ps：过程中爆红的可以选择
（1）硬着头皮跟着做下去。
（2）拉到文章最后导入jar包。
第三步：配置代码。
（1） MyConfig.java

package com.github.wxpay.sdk;
import com.github.wxpay.sdk.WXPayConfig;
import java.io.*;
public class MyConfig extends WXPayConfig{
    private byte[] certData;
    public MyConfig() throws Exception {
    	//String certPath = "d:/tomcat/ssqc/webapps/wxpay-sdk/cert/apiclient_cert.p12";
        
    	//上面六行注释,要修改WXPay.java,注释掉63行
    }
    public String getAppID() {
        return "wx8397f8696b538317";
    }
    public String getMchID() {
        return "1473426802";
    }
    public String getKey() {
        return "T6m9iK73b0kn9g5v426MKfHQH7X8rKwb";
    }
    public InputStream getCertStream() {
        ByteArrayInputStream certBis = new ByteArrayInputStream(this.certData);
        return certBis;
    }
    public int getHttpConnectTimeoutMs() {
        return 8000;
    }
    public int getHttpReadTimeoutMs() {
        return 10000;
    }
//	@Override
//	IWXPayDomain getWXPayDomain() {
//		// TODO Auto-generated method stub
//		return null;
//	}
	//README.MD漏了这个类型:
	public IWXPayDomain getWXPayDomain() {
        // 这个方法需要这样实现, 否则无法正常初始化WXPay
    IWXPayDomain iwxPayDomain = new IWXPayDomain() {
        public void report(String domain, long elapsedTimeMillis, Exception ex) {
    
        }
        public DomainInfo getDomain(WXPayConfig config) {
            return new IWXPayDomain.DomainInfo(WXPayConstants.DOMAIN_API, true);
        }
    };
    return iwxPayDomain;
  }//public IWXPayDomain getWXPayDomain
}//public class MyConfig extends WXPayConfig

（2） WXPayExample.java

// A code block
var foo = 'bar';package com.github.wxpay.sdk;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;
//import com.google.zxing.*;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
public class WXPayExample {
    public static void main(String[] args) throws Exception {
            MyConfig config = new MyConfig();
            WXPay wxpay = new WXPay(config);
        Map data = new HashMap();
        data.put("body", "QQ会员充值");
        data.put("out_trade_no", "2020113010595900000012");
        data.put("device_info", "");
        data.put("fee_type", "CNY");
        data.put("total_fee", "1");
        data.put("spbill_create_ip", "123.12.12.123");
        data.put("notify_url", "http://www.gzchenlijun.com/notify.php");
        data.put("trade_type", "NATIVE");  // 此处指定为扫码支付//APP
        data.put("product_id", "12");
        try {
            Map resp = wxpay.unifiedOrder(data);
            System.out.println(resp);
        } catch (Exception e) {
            e.printStackTrace();
        }    
    }//public static void main
    public void dopay(String order_id,String price,String jdpath) throws Exception {
        MyConfig config = new MyConfig();
        WXPay wxpay = new WXPay(config);
        Map data = new HashMap();
        data.put("body", "广州软件研究所");
        data.put("out_trade_no", order_id);
        data.put("device_info", "");
        data.put("fee_type", "CNY");
        data.put("total_fee", price);
        data.put("spbill_create_ip", "123.12.12.123");
        data.put("notify_url", "http://www.gzchenlijun.com/notify.php");
        data.put("trade_type", "NATIVE");  // 此处指定为扫码支付
        data.put("product_id", "12");
        try {
            //发起支付
            Map resp = wxpay.unifiedOrder(data); 
            System.out.println(resp);   
            System.out.println("jdpath2="+jdpath);
            //获取二维码URL
            String code_url = resp.get("code_url");
            //根据url生成二维码
            String text = code_url; 
            int width = 300; 
            int height = 300; 
            //二维码的图片格式 
            String format = "gif"; 
            Hashtable hints = new Hashtable(); 
            //内容所使用编码 
            hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); 
            BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, hints); 
            //生成二维码 
            //File outputFile = new File("D:/Tomcat 7.0/webapps/wxpay-sdk"+"/img/"+"/"+order_id+".gif");
            System.out.println("jdpath="+jdpath);
            File outputFile = new File(jdpath+"/img/"+"/"+order_id+".gif");
            //二维码图片放置的目录jdpath是首页index.jsp生成的
            if(!outputFile.exists()){
            QRUtil.writeToFile(bitMatrix, format, outputFile); 
            }//if(!outputFile.exists
        } catch (Exception e) {
            e.printStackTrace();
        }// try
		
    }// public Map dopay
    ///订单查询
    public  String chaxun(String order_id) throws Exception {
        MyConfig config = new MyConfig();
        WXPay wxpay = new WXPay(config);
        Map data = new HashMap();
        data.put("out_trade_no", order_id);
        String trade_state = "";        

        try {
            Map resp = wxpay.orderQuery(data);
            trade_state = resp.get("trade_state").toString();
            //System.out.println(resp);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return trade_state;
    }  
    public static void getTXT() throws Exception {
    	String filePath = "C:\a.txt";
    	String content="SUCCESS";
    	FileWriter fwriter = null;
        try {
            // true表示不覆盖原来的内容，而是加到文件的后面。若要覆盖原来的内容，直接省略这个参数就好
            fwriter = new FileWriter(filePath);
            fwriter.write(content);
        } catch (IOException ex) {
            ex.printStackTrace();
        } finally {
            try {
                fwriter.flush();
                fwriter.close();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        //return content;
    }
}//public class WXPayExample

（3）在src/main/java的代码窗口添加一个新文件MatrixToImageWriter.java

package com.github.wxpay.sdk;

import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Hashtable;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.Map;


public final class MatrixToImageWriter {
 
 
 public static  BufferedImage makeMatrixImg(String content, String logoPath,int width,int height) throws WriterException, IOException{
  
  // 设置矩阵所使用的编码格式
  Hashtable hints = new Hashtable() ;
  hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
  // 初始化矩阵
  BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);
  // 将矩阵图形化
  BufferedImage matrixImage = toBufferredImage(bitMatrix);
 
  
  // 2.1 读取logo图片
  BufferedImage logoImage = ImageIO.read(new File(logoPath));
 
  
  Graphics2D g2d = matrixImage.createGraphics() ;
  
  int posW = (matrixImage.getWidth()-logoImage.getWidth())/2 ;
  int posH = (matrixImage.getHeight()-logoImage.getHeight())/2 ;
  g2d.drawImage(logoImage, posW, posH, null);
  g2d.dispose();
  logoImage.flush();
 
  
 
  //boolean writed = ImageIO.write(matrixImage, format, os) ;
  return matrixImage;
 }
 
 private static BufferedImage toBufferredImage(BitMatrix bitMatrix){
  int width = bitMatrix.getWidth();
  int height = bitMatrix.getHeight();
 
  BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
  for (int i=0; i 
（4） 在WebRoot下添加一个新文件index.jsp,代码如下 
<%@ page pageEncoding="utf-8" contentType="text/html; charset=utf-8" language="java" import="java.sql.*,java.util.*,java.text.*" errorPage="" %>





电子商场


 

 

<% 
String user = "guest";顾客注册账号
Connection con; 
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://172.16.252.48:3306/goods?useUnicode=true&characterEncoding=utf-8","root","chenlijun");
Statement sql; 
ResultSet rs; 
try
{ 
request.setCharacterEncoding("utf-8");
sql=con.createStatement(); 
rs=sql.executeQuery("SELECt * FROM goods.goods");
out.print(""); 
out.print(""); 
out.print(""); 
out.print(""); 
out.print(""); 
while(rs.next()) 
{ out.print(""); 
out.print(""); 
out.print("");  
String id=rs.getString("id");//商品的ID
String order_id=(String)(new SimpleDateFormat("yyyyMMdd").format(Calendar.getInstance().getTime()));
int rmd=(int)(Math.floor(Math.random()*10000000));
order_id=order_id+rmd;
//order_id = "202012211261053";//20201221647394
//order_id = "20201221647394";202012226830336
//order_id = "202012228246206";
String price1 = (String)rs.getString("price");
float price2= Float.parseFloat(price1)*100;//字符串转float;
int price= (int)price2;
String title1 = rs.getString("price");//最好不要传输中文,传id过去,再读取商品的title
String slt = rs.getString("slt");
out.print(""); 
out.print("") ; 
}
out.print("电子商场
添加商品
"+"标题"); 
out.print(" "+"价格"); 
out.print(" "+"操作"); 
out.print("
"+rs.getString("title1")+" "+rs.getString("price")+" 我要购买"); 
con.close(); 
} 
catch(SQLException e1) 
{ 
out.print("SQL异常！！！！"); 
} 
%> 

 


 
（5） 在WebRoot下添加一个新文件addorder.jsp,代码如下： 
<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*,java.util.*,java.text.*" errorPage="" %>




去支付中心





<%
	//从首页index.jsp获取订单编号,商品价格,商品的ID号;
	String order_id = request.getParameter("order_id");
	String  price = request.getParameter("price");
	String  real_price = price;
	String  order_info = request.getParameter("order_info");
	String  pay_type = "1";//1：微信支付，2：支付宝支付
	String pay_time=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(Calendar.getInstance().getTime());
	String status = null;
	String id = request.getParameter("id");
	String user = request.getParameter("user");
	Connection con=null;
	try
	{ 
	Class.forName("com.mysql.jdbc.Driver");
	con = DriverManager.getConnection("jdbc:mysql://172.16.252.48:3306/goods","root","chenlijun");
	Statement stat; 
	stat=con.createStatement(); 
	//检查是否已经添加
	Statement sql1; 
	ResultSet rs; 
	sql1=con.createStatement(); 
	rs=sql1.executeQuery("SELECt * FROM goods.order1 where order_id="+order_id);
	int row = 0;
	while(rs.next()){
	row= rs.getRow();
	}

		if(row == 0){
		String sql2="insert into order1(order_id,price,real_price,order_info,pay_type,pay_time,status,goodsid,user) values('"+order_id+"','"+price+"','"+real_price+"','"+order_info+"','"+pay_type+"','"+pay_time+"','"+status+"','"+id+"','"+user+"')";
		int s=stat.executeUpdate(sql2);
		}

	}
	catch(Exception e){
	out.println(e);
	}
	con.close();
%>

    
    
    
    





 
（6） 在WebRoot下添加一个新文件addorder2.jsp,代码如下： 
<%@ page pageEncoding="GBK" contentType="text/html; charset=GBK" language="java" import="java.sql.*" errorPage="" %>
<%@ page import="java.sql.*" %> 
<%
request.setCharacterEncoding("GBK");
String title1=request.getParameter("title1");
String price=request.getParameter("price");
String content1=request.getParameter("content1");
String slt=request.getParameter("slt");
Connection con=null;
try
{ 
request.setCharacterEncoding("GBK");
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://172.16.252.48:3306/goods?useUnicode=true&characterEncoding=GBK","root","chenlijun");
Statement sql; 
sql=con.createStatement(); 
String sql2="insert into goods(title1,price,content1,slt) values('"+title1+"','"+price+"','"+content1+"','"+slt+"')";
//out.print(sql2);
int s=sql.executeUpdate(sql2);
}
catch(Exception e){
out.println(e);
}
%>添加商品到数据库
添加商品到数据库

??


 
（7）在WebRoot下添加一个新文件pay.jsp,代码如下： 
<%@ page language="java" import="java.util.*,com.github.wxpay.sdk.*" pageEncoding="utf-8" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@ page import="java.text.*"%>

<%@page import="java.sql.*"%>
<%@ page import="java.io.OutputStream"%>
<%@ page import="java.io.*"%>
<%//@ page import="org.apache.commons.io.IOUtils"%>


  
    
    
    微信支付
	
	
	    
	
	
	
		
   
  
  
  
    <%
	    //下面是获取项目或网站的绝对地址,以便把微信支付的二维码放在此目录下
	    String realpath = application.getRealPath("/")+"img/";
	    if (!(new java.io.File(realpath).isDirectory())) //如果文件夹不存在
	       {
	         new java.io.File(realpath).mkdir();      //不存在 文件夹，则建立此文件夹
	       }
	     String jdpath = getServletContext().getRealPath("/");//获取网站的绝对路径,包括虚拟目录
	     jdpath = jdpath.replaceAll("\\", "\/");//""换成"/"
     %>
    

    微信支付
    <%
      String order_id = request.getParameter("order_id");
      String price = request.getParameter("price");
      String user = request.getParameter("user"); 
      String id = request.getParameter("id");
      
      WXPayExample wxpay = new WXPayExample();//类的实例化对象wxpay;
      wxpay.dopay(order_id,price,jdpath);//wxpay对象执行微信支付,出现二维码;
     %>
      
      /img/<%=order_id%>.gif">
      
     二维码过期还剩:
     
     

     
  
	  
	
   
  


 
（8）在WebRoot下添加jquery-3.5.1.min.js
 
 最后
 代码编写完成，选择Tomcat运行，进行测试：http://localhost:8080/wxpay
 结果：
 
 点击我要购买，调起支付界面
  
ps：整个过程中会涉及到很多jar包，爆红找不到的可以自行百度下载。
 以下是我的整个工程目录和涉及到的其他jar包： 

 Webroot下：
 
 希望大家也能成功。

电子商场
添加商品
"+"标题"); out.print("	"+"价格"); out.print("	"+"操作"); out.print("
"+rs.getString("title1")+"	"+rs.getString("price")+"	我要购买

【微信支付】小案例，Java版

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