java实现微信公众号消息推送的方法详解

早安！:{{name.DATA}} 
天气：{{weather.DATA}} 
距离破壳日：{{birthday.DATA}}

        <dependency>
            <groupId>com.github.binarywang</groupId>
            <artifactId>weixin-java-mp</artifactId>
            <version>3.3.0</version>
        </dependency>

        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>2.9.2</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>2.9.2</version>
        </dependency>
<!--        knife4j 依赖-->
        <dependency>
            <groupId>com.github.xiaoymin</groupId>
            <artifactId>knife4j-spring-boot-starter</artifactId>
            <version>2.0.7</version>
        </dependency>

@Api(tags = "各项测试")
@RestController
@RequestMapping("/loginInfo")
public class SendWeChatMessageController {
//    /*
//     * 功能: 公众号：appid,这里也可以配置到yaml 文件里面
//     */
//
//    @Value("${wx.appId}")
//    private String appId;
//
//    /*
//     * 功能: 公众号：appsecret
//     */
//
//    @Value("${wx.appsecret}")
//    private String appsecret;
    private final Logger logger = LoggerFactory.getLogger(SendWeChatMessageController.class);
    @ApiOperation("获取token")
    @GetMapping("/getToken")
    public Object getToken(@PathParam("grantType") String grantType,@PathParam("appId") String appId,@PathParam("secret") String secret) throws Exception {
        String tokenUrl = WeChatUrlEnum.TOKEN.getUrl();
        String params = "grant_type=" + grantType + "&appid=" + appId + "&secret=" + secret;
        logger.info("请求地址为：" + tokenUrl + params);
        String tokenResponse = HttpUtils.sendGet(tokenUrl, params);
        JSON parse = JSONUtil.parseObj(tokenResponse);
        System.out.println(parse);
        return parse;
    }
    @ApiOperation("发送消息")
    @PostMapping("/testPushMessage")
    public String pushMessage(@RequestBody PushMessageToUserVo pushMessageToUserVo) {
        // 组装要发送的数据
        JSONObject body = new JSONObject();
        // 要推给谁
        body.put("touser", pushMessageToUserVo.getTouser());
        // 模板ID
        body.put("template_id", "这里填写自己的模板id");
        String accessToken = pushMessageToUserVo.getAccessToken();
        // 创建消息和内容，这里可以自己定义，对应好模板就行
        JSONObject data = new JSONObject();
        data.put("name", new JSONObject().put("value", "做一个身体和心灵都勇敢的人，趁着身体未老，心灵还透明。晚安!"));
        data.put("weather", new JSONObject().put("value", "阴天  19°c"));
        data.put("birthday", new JSONObject().put("value", "53   天"));
        body.put("data", data);
        logger.info("body---->{}", body.toString());
        String post = HttpUtil.post("https://api.weixin.qq.com/cgi-bin/message/template/send?access_token=" + accessToken, body.toString());
        logger.info("通知到用户--->{}", post);
        return body.toString();
    }
}

@Configuration
@EnableSwagger2
public class SwaggerConfiguration {
    @Bean(value = "defaultApi2")
    public Docket defaultApi2() {
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(new ApiInfoBuilder()
                        //.title("swagger-bootstrap-ui-demo RESTful APIs")
                        .description("# swagger-bootstrap-ui-demo RESTful APIs")
                        .termsOfServiceUrl("http://www.xx.com/")
                        .contact("xx@qq.com")
                        .version("1.0")
                        .build())
                //分组名称
                .groupName("2.X版本")
                .select()
                //这里指定Controller扫描包路径,自行记得修改！！！！
                .apis(RequestHandlerSelectors.basePackage("com.example.springbootwechat.controller"))
                .paths(PathSelectors.any())
                .build();
    }
}

@Data
@ApiModel(description = "用户推送vo")
public class PushMessageToUserVo {
    @ApiModelProperty(value = "用户微信关注号", required = true)
    private String touser;
    @ApiModelProperty(value = "用户Token", required = true)
    private String accessToken;
}

public enum WeChatUrlEnum {
    /**
     * 获取token
     */
    TOKEN("获取微信 token的地址","https://api.weixin.qq.com/cgi-bin/token");
    private String info;
    private String url;
    WeChatUrlEnum(String info,String url) {
        this.info =info;
        this.url = url;
    }
    public String getInfo() {
        return info;
    }
    public void setInfo(String info) {
        this.info = info;
    }
    public String getUrl() {
        return url;
    }
    public void setUrl(String url) {
        this.url = url;
    }
}

public class HttpUtils {
   public static String sendGet(String url, String query) throws Exception {
       String fullUrl = url + "?" + query;
       HttpURLConnection connection = (HttpURLConnection) new URL(fullUrl).openConnection();
       connection.setRequestMethod("GET");
       connection.setRequestProperty("Accept", "application/json");
       if (connection.getResponseCode()!= 200) {
           throw new RuntimeException("Failed : HTTP error code : " + connection.getResponseCode());
       }
       BufferedReader br = new BufferedReader(new InputStreamReader((connection.getInputStream())));
       StringBuilder sb = new StringBuilder();
       String output;
       while ((output = br.readLine())!= null) {
           sb.append(output);
       }
       connection.disconnect();
       return sb.toString();
   }
   public static String sendPost(String url, String data) throws Exception {
       URL fullUrl = new URL(url);
       HttpURLConnection connection = (HttpURLConnection) fullUrl.openConnection();
       connection.setRequestMethod("POST");
       connection.setRequestProperty("Content-Type", "application/json");
       connection.setRequestProperty("Accept", "application/json");
       connection.setDoOutput(true);
       DataOutputStream wr = new DataOutputStream(connection.getOutputStream());
       wr.writeBytes(data);
       wr.flush();
       wr.close();
       if (connection.getResponseCode()!= 200) {
           throw new RuntimeException("Failed : HTTP error code : " + connection.getResponseCode());
       }
       BufferedReader br = new BufferedReader(new InputStreamReader((connection.getInputStream())));
       StringBuilder sb = new StringBuilder();
       String output;
       while ((output = br.readLine())!= null) {
           sb.append(output);
       }
       connection.disconnect();
       return sb.toString();
   }
}