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.jsonobject;
import com.google.gson.jsonparser;

public class jsonutilimpl implements jsonutil{

 @override
 public 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.xsd
 http://www.springframework.org/schema/context
 http://www.springframework.org/schema/context/spring-context-3.2.xsd
 http://www.springframework.org/schema/mvc
 http://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%>" rel="external nofollow" rel="external nofollow" >
 
 <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" rel="external nofollow" rel="external nofollow" >
 -->
 </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%>" rel="external nofollow" rel="external nofollow" >
 
 <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" rel="external nofollow" rel="external nofollow" >
 -->

 </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>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。