到目前为止，我们的公众号已经可以回复用户发出的消息，但是如果仅仅如此，就没必要设为开发模式了。完全不懂编程的人也可以在微信公众平台上设置回复用户的消息。
现在我们来实现我们的公众号查询全国各个城市天气这么一个功能，像公众号输入天气+地名（天气南京）就可以查询当地的天气情况。
具体实现
1.选择API
我们使用阿里云的全国天气预报查询接口。根据API说明，调用地址：http(s)://ali-weather.showapi.com/area-to-weather，请求方式：GET，返回类型：JSON
请求参数：
| 名称 | 是否必须 | 描述 |
|---|---|---|
| area | 可选 | 地区名称。名称和id必须输入一个。如果都输入，以areaid为准。 |
| areaid | 可选 | 地区id |
| need3HourForcast | 可选 | 是否需要每小时数据的累积数组。由于本系统是半小时刷一次实时状态，因此实时数组最大长度为48。每天0点长度初始化为0. 1为需要 0为不 |
| needAlarm | 可选 | 是否需要天气预警。1为需要，0为不需要。 |
| needHourData | 可选 | 是否需要每小时数据的累积数组。由于本系统是半小时刷一次实时状态，因此实时数组最大长度为48。每天0点长度初始化为0. |
| needIndex | 可选 | 是否需要返回指数数据，比如穿衣指数、紫外线指数等。1为返回，0为不返回。 |
| needMoreDay | 可选 | 是否需要返回7天数据中的后4天。1为返回，0为不返回。 |
返回示例：
{
"showapi_res_code": 0,
"showapi_res_error": "",
"showapi_res_body": {
"f6": {//今天+5天后的天气预报
"day_weather": "小雨",//白天天气
"night_weather": "小雨",//晚上天气
"night_weather_code": "07",//晚上的天气编码
"index": {//指数对象
"cold": {//感冒
"title": "少发",
"desc": "无明显降温，感冒机率较低。"
},
"clothes": {//穿衣指数
"title": "舒适",
"desc": "建议穿长袖衬衫单裤等服装。"
},
"uv": {//紫外线
"title": "最弱",
"desc": "辐射弱，涂擦SPF8-12防晒护肤品。"
},
"aqi": {//空气质量指数，越小越好
"title": "良",
"desc": "气象条件有利于空气污染物扩散。"
},
"wash_car": {//洗车
"title": "不宜",
"desc": "有雨，雨水和泥水会弄脏爱车。"
},
"travel": {//旅游
"title": "较不宜",
"desc": "有降水，推荐您在室内进行休闲运动。"
}
},
"night_wind_power": "微风10m/h",//晚上风力编号
"day_wind_power": "微风10m/h",//白天风力编号
"day_weather_code": "07",//白天的天气编码
"sun_begin_end": "06:28|20:17",//日出日落时间(中间用|分割)
"day_weather_pic": "http://app1.showapi.com/weather/icon/day/07.png",//白天天气图标
"weekday": 1,//星期几
"night_air_temperature": "15",//晚上天气温度(摄氏度)
"day_air_temperature": "24",//白天天气温度(摄氏度)
"day_wind_direction": "无持续风向",//白天风向编号
"day": "20160704",//当前天
"night_weather_pic": "http://app1.showapi.com/weather/icon/night/07.png",//晚上天气图标
"night_wind_direction": "无持续风向"//晚上风向编号
},
"f7": {//今天+6天后的天气预报
"day_weather": "小雨",//白天天气
"night_weather": "中雨",//晚上天气
"night_weather_code": "08",//晚上的天气编码
"index": {//指数对象
"cold": {//感冒
"title": "少发",
"desc": "无明显降温，感冒机率较低。"
},
"clothes": {//穿衣指数
"title": "较舒适",
"desc": "建议穿薄外套或牛仔裤等服装。"
},
"uv": {//紫外线
"title": "最弱",
"desc": "辐射弱，涂擦SPF8-12防晒护肤品。"
},
"wash_car": {//洗车
"title": "较不宜",
"desc": "有降水，推荐您在室内进行休闲运动。"
},
"travel": {//旅游
"title": "良",
"desc": "气象条件有利于空气污染物扩散。"
}
},
"night_wind_power": "微风10m/h",//晚上风力编号
"day_wind_power": "微风10m/h",//白天风力编号
"day_weather_code": "07",//白天的天气编码
"sun_begin_end": "06:28|20:17",//日出日落时间(中间用|分割)
"day_weather_pic": "http://app1.showapi.com/weather/icon/day/07.png",//白天天气图标
"weekday": 2,//星期几
"night_air_temperature": "15",//晚上天气温度(摄氏度)
"day_air_temperature": "23",//白天天气温度(摄氏度)
"day_wind_direction": "无持续风向",//白天风向编号
"day": "20160705",//当前天
"night_weather_pic": "http://app1.showapi.com/weather/icon/night/08.png",//晚上天气图标
"night_wind_direction": "无持续风向"//晚上风向编号
},
"time": "20160629113000",//预报发布时间
"ret_code": 0,
"cityInfo": {//查询的地区基本资料
"c6": "yunnan",//城市所在省英文名
"c5": "丽江",//城市所在市中文名
"c4": "lijiang",//城市所在市英文名
"c3": "丽江",//城市中文名
"c9": "中国",//城市所在国家中文名
"c8": "china",//城市所在国家英文名
"c7": "云南",//城市所在省中文名
"c17": "+8",
"c16": "AZ9888",//雷达站号
"c1": "101291401",//区域id
"c2": "lijiang",//城市英文名
"c11": "0888",//城市区号
"longitude": 100.222,//经度
"c10": "2",//城市级别
"latitude": 26.903,//纬度
"c12": "674100",//邮编
"c15": "2394"//海拔
},
"now": {//现在实时的天气情况
"aqiDetail": {//aqi明细数据
"co": 0.38,//一氧化碳1小时平均
"so2": 8,//二氧化硫1小时平均
"area": "丽江",//地区
"o3": 42,//臭氧1小时平均
"no2": 9,//二氧化氮1小时平均
"area_code": "lijiang",
"quality": "优",//空气质量指数类别，有“优、良、轻度污染、中度污染、重度污染、严重污染”6类
"aqi": 19,//空气质量指数，越小越好
"pm10": 18,//颗粒物（粒径小于等于10μm）1小时平均
"pm2_5": 12,//颗粒物（粒径小于等于2.5μm）1小时平均
"o3_8h": 37,//臭氧8小时平均
"primary_pollutant": ""//首要污染物
},
"weather_code": "03",
"wind_direction": "西北风",//风向
"temperature_time": "16:01",//获得气温的时间
"wind_power": "1级",//风力
"aqi": 19,//空气质量指数，越小越好
"sd": "70%",//空气湿度
"weather_pic": "http://appimg.showapi.com/images/weather/icon/day/03.png",//天气小图标
"weather": "阵雨",//天气
"temperature": "21"//气温
},
"f1": {//今天的天气预报
"day_weather": "小雨",//白天天气
"night_weather": "小雨",//晚上天气
"night_weather_code": "07",//晚上的天气编码
"index": {//指数对象
"yh": {//约会指数
"title": "较不适宜",
"desc": "建议尽量不要去室外约会。"
},
"ls": {//晾晒指数
"title": "不宜",
"desc": "降水可能会淋湿衣物，请选择在室内晾晒。"
},
"clothes": {//穿衣指数
"title": "较舒适",
"desc": "建议穿薄外套或牛仔裤等服装。"
},
"dy": {//钓鱼指数
"title": "不宜",
"desc": "天气不好，不适宜垂钓。"
},
"beauty": {//化妆指数
"title": "保湿",
"desc": "请选用中性保湿型霜类化妆品。"
},
"xq": {//心情指数
"title": "较差",
"desc": "雨水可能会使心绪无端地挂上轻愁。"
},
"travel": {//旅游
"title": "适宜",
"desc": "较弱降水和微风将伴您共赴旅程。"
},
"hc": {//划船指数
"title": "不适宜",
"desc": "天气不好，建议选择别的娱乐方式。"
},
"zs": {//中暑指数
"title": "无",
"desc": "气温不高，中暑机率极低。"
},
"cold": {//感冒
"title": "较易发",
"desc": "降温幅度较大，预防感冒。"
},
"gj": {//逛街指数
"title": "较适宜",
"desc": "有降水，逛街需要带雨具。"
},
"uv": {//紫外线
"title": "最弱",
"desc": "辐射弱，涂擦SPF8-12防晒护肤品。"
},
"cl": {//晨练指数
"title": "较不宜",
"desc": "室外锻炼请携带雨具。"
},
"glass": {//太阳镜
"title": "不需要",
"desc": "白天能见度差不需要佩戴太阳镜"
},
"wash_car": {//洗车
"title": "不宜",
"desc": "有雨，雨水和泥水会弄脏爱车。"
},
"aqi": {//空气质量指数，越小越好
"title": "中",
"desc": "无需特别防护"
},
"ac": {//空调控制
"title": "较少开启",
"desc": "体感舒适，不需要开启空调。"
},
"mf": {//美发指数
"title": "一般",
"desc": "建议选用防晒滋润型护发品或带遮阳帽。"
},
"ag": {//过敏指数
"title": "极不易发",
"desc": "无需担心过敏，可放心外出，享受生活。"
},
"pj": {//啤酒指数
"title": "较适宜",
"desc": "适量的饮用啤酒，注意不要过量。"
},
"nl": {//夜生活指数
"title": "较不适宜",
"desc": "建议夜生活最好在室内进行。"
},
"pk": {//放风筝指数
"title": "不宜",
"desc": "天气不好，不适宜放风筝。"
}
},
"air_press": "766 hPa",//大气压
"jiangshui": "75%",//降水概率
"night_wind_power": "微风10m/h",//晚上风力编号
"day_wind_power": "微风10m/h",//白天风力编号
"day_weather_code": "07",//白天的天气编码
"sun_begin_end": "06:28|20:17",//日出日落时间(中间用|分割)
"ziwaixian": "最弱",
"day_weather_pic": "http://app1.showapi.com/weather/icon/day/07.png",//白天天气图标
"weekday": 3,//星期几
"night_air_temperature": "15",//晚上天气温度(摄氏度)
"day_air_temperature": "22",//白天天气温度(摄氏度)
"day_wind_direction": "无持续风向",//白天风向编号
"day": "20160629",//当前天
"night_weather_pic": "http://app1.showapi.com/weather/icon/night/07.png",//晚上天气图标
"night_wind_direction": "无持续风向"//晚上风向编号
},
"f3": {//今天+2天后的天气预报
"day_weather": "小雨",//白天天气
"night_weather": "中雨",//晚上天气
"night_weather_code": "08",//晚上的天气编码
"index": {//指数对象
"cold": {//感冒
"title": "较易发",
"desc": "天较凉，增加衣服，注意防护。"
},
"clothes": {//穿衣指数
"title": "较舒适",
"desc": "建议穿薄外套或牛仔裤等服装。"
},
"uv": {//紫外线
"title": "最弱",
"desc": "辐射弱，涂擦SPF8-12防晒护肤品。"
},
"aqi": {//空气质量指数，越小越好
"title": "良",
"desc": "气象条件有利于空气污染物扩散。"
},
"wash_car": {//洗车
"title": "不宜",
"desc": "有雨，雨水和泥水会弄脏爱车。"
},
"travel": {//旅游
"title": "较不宜",
"desc": "有降水，推荐您在室内进行休闲运动。"
}
},
"night_wind_power": "微风10m/h",//晚上风力编号
"day_wind_power": "微风10m/h",//白天风力编号
"day_weather_code": "07",//白天的天气编码
"sun_begin_end": "06:28|20:17",//日出日落时间(中间用|分割)
"day_weather_pic": "http://app1.showapi.com/weather/icon/day/07.png",//白天天气图标
"weekday": 5,//星期几
"night_air_temperature": "13",//晚上天气温度(摄氏度)
"day_air_temperature": "21",//白天天气温度(摄氏度)
"day_wind_direction": "无持续风向",//白天风向编号
"day": "20160701",//当前天
"night_weather_pic": "http://app1.showapi.com/weather/icon/night/08.png",//晚上天气图标
"night_wind_direction": "无持续风向"//晚上风向编号
},
"f2": {//今天+1天后的天气预报
"day_weather": "小雨",//白天天气
"night_weather": "小雨",//晚上天气
"night_weather_code": "07",//晚上的天气编码
"index": {//指数对象
"cold": {//感冒
"title": "少发",
"desc": "无明显降温，感冒机率较低。"
},
"clothes": {//穿衣指数
"title": "舒适",
"desc": "建议穿长袖衬衫单裤等服装。"
},
"uv": {//紫外线
"title": "最弱",
"desc": "辐射弱，涂擦SPF8-12防晒护肤品。"
},
"aqi": {//空气质量指数，越小越好
"title": "良",
"desc": "气象条件有利于空气污染物扩散。"
},
"wash_car": {//洗车
"title": "不宜",
"desc": "有雨，雨水和泥水会弄脏爱车。"
},
"travel": {//旅游
"title": "较不宜",
"desc": "有降水，推荐您在室内进行休闲运动。"
}
},
"night_wind_power": "微风10m/h",//晚上风力编号
"day_wind_power": "微风10m/h",//白天风力编号
"day_weather_code": "07",//白天的天气编码
"sun_begin_end": "06:28|20:17",//日出日落时间(中间用|分割)
"day_weather_pic": "http://app1.showapi.com/weather/icon/day/07.png",//白天天气图标
"weekday": 4,//星期几
"night_air_temperature": "16",//晚上天气温度(摄氏度)
"day_air_temperature": "24",//白天天气温度(摄氏度)
"day_wind_direction": "无持续风向",//白天风向编号
"day": "20160630",//当前天
"night_weather_pic": "http://app1.showapi.com/weather/icon/night/07.png",//晚上天气图标
"night_wind_direction": "无持续风向"//晚上风向编号
},
"f5": {//今天+4天后的天气预报
"day_weather": "阴",//白天天气
"night_weather": "小雨",//晚上天气
"night_weather_code": "07",//晚上的天气编码
"index": {//指数对象
"cold": {//感冒
"title": "少发",
"desc": "无明显降温，感冒机率较低。"
},
"clothes": {//穿衣指数
"title": "舒适",
"desc": "建议穿长袖衬衫单裤等服装。"
},
"uv": {//紫外线
"title": "最弱",
"desc": "辐射弱，涂擦SPF8-12防晒护肤品。"
},
"aqi": {//空气质量指数，越小越好
"title": "较差",
"desc": "气象条件较不利于空气污染物扩散。。"
},
"wash_car": {//洗车
"title": "不宜",
"desc": "有雨，雨水和泥水会弄脏爱车。"
},
"travel": {//旅游
"title": "较适宜",
"desc": "较适宜进行各种户内外运动。"
}
},
"night_wind_power": "微风10m/h",//晚上风力编号
"day_wind_power": "微风10m/h",//白天风力编号
"day_weather_code": "02",//白天的天气编码
"sun_begin_end": "06:28|20:17",//日出日落时间(中间用|分割)
"day_weather_pic": "http://app1.showapi.com/weather/icon/day/02.png",//白天天气图标
"weekday": 7,//星期几
"night_air_temperature": "14",//晚上天气温度(摄氏度)
"day_air_temperature": "25",//白天天气温度(摄氏度)
"day_wind_direction": "无持续风向",//白天风向编号
"day": "20160703",//当前天
"night_weather_pic": "http://app1.showapi.com/weather/icon/night/07.png",//晚上天气图标
"night_wind_direction": "无持续风向"//晚上风向编号
},
"f4": {//今天+3天后的天气预报
"day_weather": "小雨",//白天天气
"night_weather": "多云",//晚上天气
"night_weather_code": "01",//晚上的天气编码
"index": {//指数对象
"cold": {//感冒
"title": "较易发",
"desc": "天较凉，增加衣服，注意防护。"
},
"clothes": {//穿衣指数
"title": "较舒适",
"desc": "建议穿薄外套或牛仔裤等服装。"
},
"uv": {//紫外线
"title": "最弱",
"desc": "辐射弱，涂擦SPF8-12防晒护肤品。"
},
"aqi": {//空气质量指数，越小越好
"title": "良",
"desc": "气象条件有利于空气污染物扩散。"
},
"wash_car": {//洗车
"title": "不宜",
"desc": "有雨，雨水和泥水会弄脏爱车。"
},
"travel": {//旅游
"title": "较不宜",
"desc": "有降水，推荐您在室内进行休闲运动。"
}
},
"night_wind_power": "微风10m/h",//晚上风力编号
"day_wind_power": "微风10m/h",//白天风力编号
"day_weather_code": "07",//白天的天气编码
"sun_begin_end": "06:28|20:17",//日出日落时间(中间用|分割)
"day_weather_pic": "http://app1.showapi.com/weather/icon/day/07.png",//白天天气图标
"weekday": 6,//星期几
"night_air_temperature": "15",//晚上天气温度(摄氏度)
"day_air_temperature": "22",//白天天气温度(摄氏度)
"day_wind_direction": "无持续风向",//白天风向编号
"day": "20160702",//当前天
"night_weather_pic": "http://app1.showapi.com/weather/icon/night/01.png",//晚上天气图标
"night_wind_direction": "无持续风向"//晚上风向编号
}
}
}2.返回数据的封装
返回的是一个JSON格式数据，下面要将这些数据进行封装，封装的代码就不贴了，需要的可以联系我。
3.我们使用阿里提供的HTTP发送请求工具类
package org.sm.util.ali;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import org.apache.commons.lang.StringUtils;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
public class HttpUtils {
/**
* get
*
* @param host
* @param path
* @param method
* @param headers
* @param querys
* @return
* @throws Exception
*/
public static HttpResponse doGet(String host, String path, String method, Map<String, String> headers, Map<String, String> querys) throws Exception {
HttpClient httpClient = wrapClient(host);
HttpGet request = new HttpGet(buildUrl(host, path, querys));
for (Map.Entry<String, String> e : headers.entrySet()) {
request.addHeader(e.getKey(), e.getValue());
}
return httpClient.execute(request);
}
/**
* post form
*
* @param host
* @param path
* @param method
* @param headers
* @param querys
* @param bodys
* @return
* @throws Exception
*/
public static HttpResponse doPost(String host, String path, String method, Map<String, String> headers, Map<String, String> querys, Map<String, String> bodys) throws Exception {
HttpClient httpClient = wrapClient(host);
HttpPost request = new HttpPost(buildUrl(host, path, querys));
for (Map.Entry<String, String> e : headers.entrySet()) {
request.addHeader(e.getKey(), e.getValue());
}
if (bodys != null) {
List<NameValuePair> nameValuePairList = new ArrayList<NameValuePair>();
for (String key : bodys.keySet()) {
nameValuePairList.add(new BasicNameValuePair(key, bodys.get(key)));
}
UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(nameValuePairList, "utf-8");
formEntity.setContentType("application/x-www-form-urlencoded; charset=UTF-8");
request.setEntity(formEntity);
}
return httpClient.execute(request);
}
/**
* Post String
*
* @param host
* @param path
* @param method
* @param headers
* @param querys
* @param body
* @return
* @throws Exception
*/
public static HttpResponse doPost(String host, String path, String method, Map<String, String> headers, Map<String, String> querys, String body) throws Exception {
HttpClient httpClient = wrapClient(host);
HttpPost request = new HttpPost(buildUrl(host, path, querys));
for (Map.Entry<String, String> e : headers.entrySet()) {
request.addHeader(e.getKey(), e.getValue());
}
if (StringUtils.isNotBlank(body)) {
request.setEntity(new StringEntity(body, "utf-8"));
}
return httpClient.execute(request);
}
/**
* Post stream
*
* @param host
* @param path
* @param method
* @param headers
* @param querys
* @param body
* @return
* @throws Exception
*/
public static HttpResponse doPost(String host, String path, String method, Map<String, String> headers, Map<String, String> querys, byte[] body) throws Exception {
HttpClient httpClient = wrapClient(host);
HttpPost request = new HttpPost(buildUrl(host, path, querys));
for (Map.Entry<String, String> e : headers.entrySet()) {
request.addHeader(e.getKey(), e.getValue());
}
if (body != null) {
request.setEntity(new ByteArrayEntity(body));
}
return httpClient.execute(request);
}
/**
* Put String
*
* @param host
* @param path
* @param method
* @param headers
* @param querys
* @param body
* @return
* @throws Exception
*/
public static HttpResponse doPut(String host, String path, String method, Map<String, String> headers, Map<String, String> querys, String body) throws Exception {
HttpClient httpClient = wrapClient(host);
HttpPut request = new HttpPut(buildUrl(host, path, querys));
for (Map.Entry<String, String> e : headers.entrySet()) {
request.addHeader(e.getKey(), e.getValue());
}
if (StringUtils.isNotBlank(body)) {
request.setEntity(new StringEntity(body, "utf-8"));
}
return httpClient.execute(request);
}
/**
* Put stream
*
* @param host
* @param path
* @param method
* @param headers
* @param querys
* @param body
* @return
* @throws Exception
*/
public static HttpResponse doPut(String host, String path, String method, Map<String, String> headers, Map<String, String> querys, byte[] body) throws Exception {
HttpClient httpClient = wrapClient(host);
HttpPut request = new HttpPut(buildUrl(host, path, querys));
for (Map.Entry<String, String> e : headers.entrySet()) {
request.addHeader(e.getKey(), e.getValue());
}
if (body != null) {
request.setEntity(new ByteArrayEntity(body));
}
return httpClient.execute(request);
}
/**
* Delete
*
* @param host
* @param path
* @param method
* @param headers
* @param querys
* @return
* @throws Exception
*/
public static HttpResponse doDelete(String host, String path, String method, Map<String, String> headers, Map<String, String> querys) throws Exception {
HttpClient httpClient = wrapClient(host);
HttpDelete request = new HttpDelete(buildUrl(host, path, querys));
for (Map.Entry<String, String> e : headers.entrySet()) {
request.addHeader(e.getKey(), e.getValue());
}
return httpClient.execute(request);
}
private static String buildUrl(String host, String path, Map<String, String> querys) throws UnsupportedEncodingException {
StringBuilder sbUrl = new StringBuilder();
sbUrl.append(host);
if (!StringUtils.isBlank(path)) {
sbUrl.append(path);
}
if (null != querys) {
StringBuilder sbQuery = new StringBuilder();
for (Map.Entry<String, String> query : querys.entrySet()) {
if (0 < sbQuery.length()) {
sbQuery.append("&");
}
if (StringUtils.isBlank(query.getKey()) && !StringUtils.isBlank(query.getValue())) {
sbQuery.append(query.getValue());
}
if (!StringUtils.isBlank(query.getKey())) {
sbQuery.append(query.getKey());
if (!StringUtils.isBlank(query.getValue())) {
sbQuery.append("=");
sbQuery.append(URLEncoder.encode(query.getValue(), "utf-8"));
}
}
}
if (0 < sbQuery.length()) {
sbUrl.append("?").append(sbQuery);
}
}
return sbUrl.toString();
}
private static HttpClient wrapClient(String host) {
HttpClient httpClient = new DefaultHttpClient();
if (host.startsWith("https://")) {
sslClient(httpClient);
}
return httpClient;
}
private static void sslClient(HttpClient httpClient) {
try {
SSLContext ctx = SSLContext.getInstance("TLS");
X509TrustManager tm = new X509TrustManager() {
public X509Certificate[] getAcceptedIssuers() {
return null;
}
public void checkClientTrusted(X509Certificate[] xcs, String str) {
}
public void checkServerTrusted(X509Certificate[] xcs, String str) {
}
};
ctx.init(null, new TrustManager[] { tm }, null);
SSLSocketFactory ssf = new SSLSocketFactory(ctx);
ssf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
ClientConnectionManager ccm = httpClient.getConnectionManager();
SchemeRegistry registry = ccm.getSchemeRegistry();
registry.register(new Scheme("https", 443, ssf));
} catch (KeyManagementException ex) {
throw new RuntimeException(ex);
} catch (NoSuchAlgorithmException ex) {
throw new RuntimeException(ex);
}
}
}4.新建一个WeatherService服务类
package org.sm.service;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.HashMap;
import java.util.Map;
import org.apache.http.HttpResponse;
import org.apache.http.util.EntityUtils;
import org.sm.message.rsp.data.weather.F1;
import org.sm.message.rsp.data.weather.F2;
import org.sm.message.rsp.data.weather.F3;
import org.sm.message.rsp.data.weather.ShowApi;
import org.sm.util.ali.HttpUtils;
import com.google.gson.Gson;
public class WeatherService {
public static String getWeather(String area) {
String host = "https://ali-weather.showapi.com";
String path = "/area-to-weather";
String method = "GET";
// 需要购买，购买完后会给你一个appcode
String appcode = "xxxxxxxxxxxxxxxxxxxxxxxxxxx";
Map<String, String> headers = new HashMap<String, String>();
// 最后在header中的格式(中间是英文空格)为Authorization:APPCODE
// 83359fd73fe94948385f570e3c139105
headers.put("Authorization", "APPCODE " + appcode);
Map<String, String> querys = new HashMap<String, String>();
querys.put("area", area);
querys.put("need3HourForcast", "0");
querys.put("needAlarm", "0");
querys.put("needHourData", "0");
querys.put("needIndex", "0");
querys.put("needMoreDay", "0");
String result = null;
try {
HttpResponse response = HttpUtils.doGet(host, path, method, headers, querys);
System.out.println(response.toString());
// 获取response的body
String json = EntityUtils.toString(response.getEntity());
// 使用GSON框架，将json数据转换成Java对象
ShowApi api = new Gson().fromJson(json, ShowApi.class);
result = getResult(api);
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
private static String getResult(ShowApi api) {
StringBuffer buffer = new StringBuffer();
F1 f1 = api.getShowapi_res_body().getF1();
F2 f2 = api.getShowapi_res_body().getF2();
F3 f3 = api.getShowapi_res_body().getF3();
buffer.append("今天\n白天").append(f1.getDay_air_temperature()).append("度").append(" ").append(f1.getDay_weather()).append(" ").append(f1.getDay_wind_direction()).append(" ")
.append(f1.getDay_wind_power()).append(" ,夜间").append(f1.getNight_air_temperature()).append("度").append(" ").append(f1.getNight_weather()).append(" ")
.append(f1.getNight_wind_direction()).append(" ").append(f1.getNight_wind_power()).append("\n\n明天(").append(getMonthDay(1)).append(")").append("\n白天")
.append(f2.getDay_air_temperature()).append("度").append(" ").append(f2.getDay_weather()).append(" ").append(f2.getDay_wind_direction()).append(" ").append(f2.getDay_wind_power())
.append(" ,夜间").append(f2.getNight_air_temperature()).append("度").append(" ").append(f2.getNight_weather()).append(" ").append(f2.getNight_wind_direction()).append(" ")
.append(f2.getNight_wind_power()).append("\n\n后天(").append(getMonthDay(2)).append(")").append("\n白天").append(f3.getDay_air_temperature()).append("度").append(" ")
.append(f3.getDay_weather()).append(" ").append(f3.getDay_wind_direction()).append(" ").append(f3.getDay_wind_power()).append(" ,夜间").append(f3.getNight_air_temperature())
.append("度").append(" ").append(f3.getNight_weather()).append(" ").append(f3.getNight_wind_direction()).append(" ").append(f3.getNight_wind_power());
return buffer.toString();
}
/**
* 获取前/后n天日期(M月d日)
*
* @return
*/
private static String getMonthDay(int diff) {
DateFormat df = new SimpleDateFormat("M月d日");
Calendar c = Calendar.getInstance();
c.add(Calendar.DAY_OF_YEAR, diff);
return df.format(c.getTime());
}
}
5.引入jar包
6.修改下ServiceServlet中doPost方法
/**
* 处理微信服务器发来的消息
*/
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// 将请求、响应的编码均设置为UTF-8（防止中文乱码）
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
Map<String, String> map = null;
try {
map = MessageUtil.parseXml(request);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// 发送方帐号（open_id）
String fromUserName = map.get("FromUserName");
// 公众帐号
String toUserName = map.get("ToUserName");
// 消息类型
String msgType = map.get("MsgType");
// 请求消息内容
String content = map.get("Content");
if ("text".equals(msgType) && content.startsWith("天气")) {
String area = content.substring(2);
// 默认回复此文本消息
TextMessage textMessage = new TextMessage();
textMessage.setToUserName(fromUserName);
textMessage.setFromUserName(toUserName);
textMessage.setCreateTime(new Date().getTime());
textMessage.setMsgType("text");
textMessage.setContent(WeatherService.getWeather(area));
String respMessage = MessageUtil.textMessageToXml(textMessage);
System.out.println(respMessage);
// 响应消息
PrintWriter out = response.getWriter();
out.print(respMessage);
out.close();
}
}
6.项目结构
查询天气预报功能已经实现了，是不是很简单。只要调用第三方接口就可以，而且还有相应的示例代码。其中appcode需要我们自己购买对应的api，买完后会返回给我们，阿里云里面提供api还有很多，套路都是一样自己可以试着玩玩。