Spring 使用 RestTemplate 模拟 电商网站+支付平台

一、电商网站+支付平台的支付过程

通过RestTemplate模板对象发送http请求并接收返回结果。

支付架构：

支付过程：

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>SSM</groupId>
    <artifactId>SSM</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>
    <build>
        <sourceDirectory>src</sourceDirectory>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.5.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <artifactId>maven-war-plugin</artifactId>
                <version>3.0.0</version>
                <configuration>
                    <warSourceDirectory>WebContent</warSourceDirectory>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <dependencies>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.3.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.1.9.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-dbcp2</artifactId>
            <version>2.1.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.1.9.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.1.9.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>4.1.9.RELEASE</version>
        </dependency>
        <!-- 对json数据的支持jar -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.8.10</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.8.10</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.8.10</version>
        </dependency>
        <!-- 签名加密依赖 -->
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.11</version>
        </dependency>
        <!-- springmvc对xml数据封装的支持 -->
        <dependency>
            <groupId>com.fasterxml.jackson.dataformat</groupId>
            <artifactId>jackson-dataformat-xml</artifactId>
            <version>2.9.0</version>
        </dependency>
        <dependency>
            <groupId>org.codehaus.woodstox</groupId>
            <artifactId>woodstox-core-asl</artifactId>
            <version>4.4.1</version>
        </dependency>
<!--         spring密码安全机制 -->
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-core</artifactId>
            <version>4.2.0.RELEASE</version>
        </dependency>
    </dependencies>
</project>

　　submit.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE html>
<html>
<head>
<base href="<%=basePath%>"/>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
    <form action="wenxinpay" method="post">
        <p>订单详情</p>
        <p>苹果X一台，总金额：8888.88</p>
        <p>选择支付方式：微信支付，支付宝支付</p>
        <input type="submit" value="支付">
    </form>
</body>
</html>

　　OrderController.java

package com.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.client.RestTemplate;

import com.pojo.OrderInfo;
import com.pojo.ResultBean;

@Controller
public class OrderController {
    @Autowired
    RestTemplate rest;//spring发送请求并接受相应对象的模板对象，需要配置一个bean对象
    
    public void setRest(RestTemplate rest) {
        this.rest = rest;
    }

    //商户下单
    @RequestMapping(value="/wenxinpay",method=RequestMethod.POST)
    public String weinxinPay(){
        //拿到页面的订单数据
        
        //封装好数据，发送到平台的下单api
        OrderInfo order = new OrderInfo("010101","iphoneX256G全网通5.1金色一台","9895729387239","888888","233.54.23.11","http://localhost:8888/SSM/reback","iyuddgsdhksa","328y4h32jhi7yf348");
        ResultBean rb = rest.postForObject("http://localhost:8888/SSM/testrest", order,ResultBean.class);
        System.out.println("商户拿到平台的返回信息：");
        System.out.println(rb.toString());
        return "redirect:"+rb.getPayUrl();
    }
    
    //平台方拿到订单，并且返回结果
    @RequestMapping(value="/testrest",method=RequestMethod.POST)
    public @ResponseBody ResultBean testRest(@RequestBody OrderInfo order){
        System.out.println("平台从商户拿到的订单信息：");
        System.out.println(order.toString());
        ResultBean rb = new ResultBean("SUCCESS", "成功", "wx731j3uy8u12u8y3", "213892173987", "http://www.baidu.com?id=1123213", "asdu2323g4jygsd", "hdsgjg12323");
        return rb;
    }
}

　　spring-mvc.xml

    <bean id="restTemplate"     class="org.springframework.web.client.RestTemplate">