本實例實現(xiàn)在jsp頁面實現(xiàn)查詢?nèi)珖鞘刑鞖忸A(yù)報的功能，供大家參考，具體內(nèi)容如下
實例目錄：
實現(xiàn)效果：
具體思路：
從和風天氣api那里取得具體城市的api接口，獲取json數(shù)據(jù)，再對json數(shù)據(jù)進行解析。
獲取json數(shù)據(jù)：
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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(); /*對和風天氣提供的鏈接進行連接*/ connection.connect(); /*獲取狀態(tài)碼*/ int recode = connection.getResponseCode(); BufferedReader bufferedReader = null; String json = new String(); /*如果連接成功*/ if(recode==200) { /*對數(shù)據(jù)進行讀，并且封裝到j(luò)son這個字符串，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; } } |
對json字符串進行解析，這里使用谷歌的gson工具包：
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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); //創(chuàng)建JsonObject對象 JsonArray array=object.get("results").getAsJsonArray();//得到j(luò)son數(shù)組 JsonObject sJsonObject = array.get(0).getAsJsonObject();//按索引得到其中具體數(shù)據(jù) 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; } } |
完整代碼：
Controller層：
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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：
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<?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"> <!-- 注解掃描包 --> <context:component-scan base-package="com.web" /> <!-- 開啟注解 --> <mvc:annotation-driven /> <!-- 靜態(tài)資源(js/image)的訪問 --> <mvc:resources location="/js/" mapping="/js/**"/> <!-- 定義視圖解析器 --> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/"></property> <property name="suffix" value=".jsp"></property> </bean></beans> |
查詢主頁：
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<%@ 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> |
展示頁面：
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<%@ 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內(nèi)容，希望對大家的學(xué)習有所幫助，也希望大家多多支持服務(wù)器之家。
