Flask接口签名sign原理与实例代码浅析
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2023-05-18
SpringMVC结合天气api实现天气查询
本实例实现在jsp页面实现查询全国城市天气预报的功能,供大家参考,具体内容如下
实例目录:
实现效果:
具体思路:
从和风天气api那里取得具体城市的api接口,获取json数据,再对json数据进行解析。
获取json数据:
package com.util;
import java.io.BufferedReader;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
public class NetUtilImpl implements NetUtil{
@Override
public String getJson(String url) throws IOException{
HttpURLConnection connection = null;
URL url2 = new URL(url);
connection=(HttpURLConnection) url2.openConnection();
/*对和风天气提供的链接进行连接*/
connection.connect();
/*获取状态码*/
int recode = connection.getResponseCode();
BufferedReader bufferedReader = null;
String json = new String();
/*如果连接成功*/
if(recode==200) {
/*对数据进行读,并且封装到json这个字符串,并且返回json*/
InputStream inputStream = connection.getInputStream();
bufferedReader=new BufferedReader(new InputStreamReader(inputStream,"UTF-8"));
String string = null;
while ((string=bufferedReader.readLine())!=null) {
json=json+string;
ByteBuffer buffer = ByteBuffer.wrap(new String(string).getBytes("UTF-8"));
}
}
return json;
}
}
对json字符串进行解析,这里使用谷歌的gson工具包:
package com.util;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;
import com.google.gson.JsonArray;
import com.google.gson.JsonObjecheOwNXt;
import com.google.gson.JsonParser;
public class JsonUtilImpl implements JsonUtil{
@Override
public List
ArrayList
JsonParser jsonParser = new JsonParser();//json解析器
JsonObject object=(JsonObject) jsonParser.parse(json); //创建JsonObject对象
JsonArray array=object.get("results").getAsJsonArray();//得到json数组
JsonObject sJsonObject = array.get(0).getAsJsonObject();//按索引得到其中具体数据
JsonObject location = sJshttp://onObject.get("location").getAsJsonObject();
JsonObject now = sJsonObject.get("now").getAsJsonObject();
lists.add(location.get("name").getAsString());
lists.add(now.get("text").getAsString());
lists.add(now.get("temperature").getAsString());
// lists.add(now.get("humidity").getAsString());
// lists.add(now.get("wind_speed").getAsString());
return lists;
}
}
完整代码:
Controller层:
package com.web;
import java.io.IOException;
import java.util.List;
import javax.annotation.Resource;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.w3c.dom.ls.LSException;
import com.google.common.collect.Lists;
import com.sun.org.apache.bcel.internal.generic.NEW;
import com.util.JsonUtil;
import com.util.JsonUtilImpl;
import com.util.NetUtil;
import com.util.NetUtilImpl;
@Controller
@RequestMapping("/wea")
public class Forest {
NetUtilImpl netUtilImpl = new NetUtilImpl();
JsonUtilImpl jsonUtilImpl = new JsonUtilImpl();
@RequestMapping("/forest")
public String forest(String city,Model model) throws IOException {
String url = "https://api.seniverse.com/v3/weather/now.json?key=mtpmwyecaphmrzwc&location="+city+"&language=zh-Hans&unit=c";
String data = netUtilImpl.getJson(url);
List
model.addAttribute("lists",lists);
return "display";
}
@RequestMapping("/fff")
public String fff() {
return "a";
}
}
springMVC配置文件:
xmlns:xsi="http://w3.org/2001/XMLSchema-instance" xmlns:context="http://springframework.org/schema/context" xmlns:mvc="http://springframework.org/schema/mvc" xsi:schemaLocation="http://springframework.org/schema/beans http://springframework.org/schema/beans/spring-beans.xsd http://springframework.org/schema/context http://springframework.org/schema/context/spring-context-3.2.xsd http://springframework.org/schema/mvc http://springframework.org/schema/mvc/spring-mvc-3.2.xsd">
xmlns:xsi="http://w3.org/2001/XMLSchema-instance"
xmlns:context="http://springframework.org/schema/context"
xmlns:mvc="http://springframework.org/schema/mvc"
xsi:schemaLocation="http://springframework.org/schema/beans
http://springframework.org/schema/beans/spring-beans.xsd
http://springframework.org/schema/context
http://springframework.org/schema/context/spring-context-3.2.xsd
http://springframework.org/schema/mvc
http://springframework.org/schema/mvc/spring-mvc-3.2.xsd">
查询主页:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
city:
展示页面:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
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