SpringMVC结合天气api实现天气查询

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。

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{@Overridepublic 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.JsonObject;import com.google.gson.JsonParser;public class JsonUtilImpl implements JsonUtil{@Overridepublic List<String> getData(String json) {ArrayList<String>  lists = new ArrayList<String>();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 = sJsonObject.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<String> lists = jsonUtilImpl.getData(data);model.addAttribute("lists",lists);return "display";}@RequestMapping("/fff")public String fff() {return "a";}}

springMVC配置文件：

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:context="http://www.springframework.org/schema/context"xmlns:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-3.2.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd"><!-- 注解扫描包 --><context:component-scan base-package="com.web" /><!-- 开启注解 --><mvc:annotation-driven /><!-- 静态资源(js/image)的访问 --><mvc:resources location="/js/" mapping="/js/**"/><!-- 定义视图解析器 --><bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/"></property><property name="suffix" value=".jsp"></property></bean></beans>

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+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>    <base href="<%=basePath%>">        <title>My JSP 'index.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0">    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">-->  </head>    <body>    <form action="/MyWeather/wea/forest">  city:<input type="text" name="city">  <input type="submit" value="提交">  </form>        </body></html>

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+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>    <base href="<%=basePath%>">        <title>My JSP 'display.jsp' starting page</title>    <meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0">    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">-->  </head>    <body>       <c:if test="${!empty lists }"><c:forEach items="${lists}" var="lists">  <c:out value="${lists}"></c:out>                     </c:forEach></c:if>    </body></html>