微信公众号

2019-04-03 0条评论 141次阅读 0人点赞

前期准备

准备如下

个人只能申请订阅号，而且不能进行微信认证，但是可以申请公众平台测试账号，拥有全部的权限，(首页—>开发者工具—>公众平台测试账号）

接入

在公网部署好一个web项目，一定是80或者443端口。接入指南

pom.xml

xml version="1.0" encoding="UTF-8"?>
<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>4.0.0modelVersion>

    <groupId>com.wx.aeoliangroupId>
    <artifactId>com.wx.aeolianartifactId>
    <version>1.0-SNAPSHOTversion>

    <dependencies>
        
        <dependency>
            <groupId>javax.servletgroupId>
            <artifactId>javax.servlet-apiartifactId>
            <version>3.1.0version>
            <scope>providedscope>
        dependency>
        
        <dependency>
            <groupId>javax.servlet.jspgroupId>
            <artifactId>jsp-apiartifactId>
            <version>2.2version>
            <scope>providedscope>
        dependency>
        
        <dependency>
            <groupId>javax.servletgroupId>
            <artifactId>jstlartifactId>
            <version>1.2version>
            <scope>runtimescope>
        dependency>
        
        <dependency>
            <groupId>commons-codecgroupId>
            <artifactId>commons-codecartifactId>
            <version>1.12version>
        dependency>
    dependencies>

    
    <properties>
        <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
        <project.basedir>D:\ProgramFiles_QY\IdeaProjects\WxAeolianproject.basedir>
    properties>

    <build>
        <plugins>
            
            <plugin>
                <groupId>org.apache.maven.pluginsgroupId>
                <artifactId>maven-compiler-pluginartifactId>
                <version>3.3version>
                <configuration>
                    <source>1.7source>
                    <target>1.7target>
                configuration>
            plugin>
            
            <plugin>
                <groupId>org.apache.maven.pluginsgroupId>
                <artifactId>maven-surefire-pluginartifactId>
                <version>2.18.1version>
                <configuration>
                    <skipTests>trueskipTests>
                configuration>
            plugin>
            
            <plugin>
                <groupId>org.apache.tomcat.mavengroupId>
                <artifactId>tomcat7-maven-pluginartifactId>
                <version>2.2version>
                <configuration>
                    <path>/${project.artifactId}path>
                configuration>
            plugin>

        plugins>
    build>
project>

核心Servlet

package com.aeolian.core;

import org.apache.commons.codec.digest.DigestUtils;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.*;

@WebServlet("/wxCore")
public class WxServlet extends HttpServlet{
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
        try {
            doPost(req,resp);
        } catch (ServletException e) {
            e.printStackTrace();
        }
    }

    /*1）将token、timestamp、nonce三个参数进行字典序排序
     *2）将三个参数字符串拼接成一个字符串进行sha1加密
     *3）开发者获得加密后的字符串可与signature对比，标识该请求来源于微信*/
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String signature = req.getParameter("signature");
        String timestamp = req.getParameter("timestamp");
        String nonce = req.getParameter("nonce");
        String echostr = req.getParameter("echostr");
        String token = "微信公众平台中设置的token";    //微信公众平台中配置
        /*1）将token、timestamp、nonce三个参数进行字典序排序*/
        String[] str = { token, timestamp, nonce };
        Arrays.sort(str); // 字典序排序
        String sortStr = str[0] + str[1] + str[2];  //排序后拼接
        /*2）将三个参数字符串拼接成一个字符串进行sha1加密*/
        String digest = DigestUtils.sha1Hex(sortStr);

        /*System.out.println("signature: "+signature);
        System.out.println("timestamp: "+timestamp);
        System.out.println("nonce: "+nonce);
        System.out.println("echostr: "+echostr);
        System.out.println("nosha1: "+sortStr);
        System.out.println("digest: "+digest);*/
        /*3)校验*/
        String result = "";
        if (digest.equals(signature)){   //与signature对比，标识该请求来源于微信
            result = echostr;  //如果是,返回echostr
        }

        resp.resetBuffer();
        resp.setContentType("text/html;charset=utf-8");
        resp.getOutputStream().write(result.getBytes("utf-8"));
        resp.getOutputStream().flush();
    }
}