Java 实现微信小程序 + 消息推送
一、官方给出的请求示例和返回示例首先，我们需要了解微信小程序的消息推送接口。根据微信官方文档，以下是发送模板消息的请求示例和返回示例：
请求示例
```jsonPOST /cgi-bin/message/template/send HTTP/1.1Host: api.weixin.qq.comContent-Type: application/json{
"touser": "OPENID",
"template_id": "TEMPLATE_ID",
"url": "URL",
"data": {
"first": {
"value": "恭喜你获得了奖品",
"color": "173177"
},
"keyword1": {
"value": "xxx",
"color": "173177"
},
"keyword2": {
"value": "xxx",
"color": "173177"
},
"remark": {
"value": "感谢参与",
"color": "173177"
}
}
}
```
返回示例
```json{
"errcode":0,
"errmsg": "ok"
}
```
二、根据上面编写实体类 (1) 请求参数 `SendTemplateReq`
```javapublic class SendTemplateReq {
/
* 接收者(用户)的 openid */
private String touser;
/
* 模板 id */
private String templateId;
/
* 点击模板消息后跳转的 url */
private String url;
/
* 模板内容 */
private Data data;
public String getTouser() {
return touser;
}
public void setTouser(String touser) {
this.touser = touser;
}
public String getTemplateId() {
return templateId;
}
public void setTemplateId(String templateId) {
this.templateId = templateId;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public Data getData() {
return data;
}
public void setData(Data data) {
this.data = data;
}
}
public class Data {
/
* 第一块内容 */
private First first;
/
* 关键词1 */
private Keyword1 keyword1;
/
* 关键词2 */
private Keyword2 keyword2;
/
* 备注 */
private Remark remark;
public First getFirst() {
return first;
}
public void setFirst(First first) {
this.first = first;
}
public Keyword1 getKeyword1() {
return keyword1;
}
public void setKeyword1(Keyword1 keyword1) {
this.keyword1 = keyword1;
}
public Keyword2 getKeyword2() {
return keyword2;
}
public void setKeyword2(Keyword2 keyword2) {
this.keyword2 = keyword2;
}
public Remark getRemark() {
return remark;
}
public void setRemark(Remark remark) {
this.remark = remark;
}
}
public class First {
/
* 值 */
private String value;
/
* 颜色 */
private String color;
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
}
public class Keyword1 {
/
* 值 */
private String value;
/
* 颜色 */
private String color;
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
}
public class Keyword2 {
/
* 值 */
private String value;
/
* 颜色 */
private String color;
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
}
public class Remark {
/
* 值 */
private String value;
/
* 颜色 */
private String color;
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
}
```
(2) 返回参数 `SendTemplateResp`
```javapublic class SendTemplateResp {
/
* 错误码 */
private int errcode;
/
* 错误信息 */
private String errmsg;
public int getErrcode() {
return errcode;
}
public void setErrcode(int errcode) {
this.errcode = errcode;
}
public String getErrmsg() {
return errmsg;
}
public void setErrmsg(String errmsg) {
this.errmsg = errmsg;
}
}
```
三、实现发送模板消息的功能```javapublic class WeChatTemplateMessageSender {
private static final String API_URL = " public SendTemplateResp sendTemplateMessage(SendTemplateReq req) throws Exception {
// 构造请求参数 Map
params.put("touser", req.getTouser());
params.put("template_id", req.getTemplateId());
params.put("url", req.getUrl());
params.put("data", req.getData());
// 发送请求 String response = sendRequest(API_URL, params);
// 解析返回结果 SendTemplateResp resp = parseResponse(response);
return resp;
}
private String sendRequest(String url, Map
// 构造 URL StringBuilder sb = new StringBuilder(url);
for (Map.Entry
sb.append("&").append(entry.getKey()).append("=").append(entry.getValue());
}
// 发送 GET 请求 String response = sendGetRequest(sb.toString());
return response;
}
private SendTemplateResp parseResponse(String response) throws Exception {
// 解析 JSON 结果 JSONObject jsonObject = new JSONObject(response);
int errcode = jsonObject.getInt("errcode");
String errmsg = jsonObject.getString("errmsg");
// 构造返回结果 SendTemplateResp resp = new SendTemplateResp();
resp.setErrcode(errcode);
resp.setErrmsg(errmsg);
return resp;
}
private String sendGetRequest(String url) throws Exception {
// 使用 OkHttp 发送 GET 请求 OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder().url(url).build();
Response response = client.newCall(request).execute();
// 返回结果 return response.body().string();
}
}
```
四、测试发送模板消息的功能```javapublic class Main {
public static void main(String[] args) throws Exception {
// 构造请求参数 SendTemplateReq req = new SendTemplateReq();
req.setTouser("OPENID");
req.setTemplateId("TEMPLATE_ID");
req.setUrl("URL");
Data data = new Data();
First first = new First();
first.setValue("恭喜你获得了奖品");
first.setColor("173177");
data.setFirst(first);
Keyword1 keyword1 = new Keyword1();
keyword1.setValue("xxx");
keyword1.setColor("173177");
data.setKeyword1(keyword1);
Keyword2 keyword2 = new Keyword2();
keyword2.setValue("xxx");
keyword2.setColor("173177");
data.setKeyword2(keyword2);
Remark remark = new Remark();
remark.setValue("感谢参与");
remark.setColor("173177");
data.setRemark(remark);
req.setData(data);
// 发送模板消息 WeChatTemplateMessageSender sender = new WeChatTemplateMessageSender();
SendTemplateResp resp = sender.sendTemplateMessage(req);
// 打印返回结果 System.out.println(resp.getErrcode());
System.out.println(resp.getErrmsg());
}
}
```
以上是发送模板消息的功能实现代码。
