WebService 获取天气预报

package com.ambow.invoic.utils;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

public class WeatherUtil {
InputStream inStream;
Element root;
public InputStream getInStream() {
return inStream;
}
public void setInStream(InputStream inStream) {
this.inStream = inStream;
}
public Element getRoot() {
return root;
}
public void setRoot(Element root) {
this.root = root;
}
public WeatherUtil() {
}

/**
* 通过输入流来获取新浪接口信息
* @param inStream
*/
public WeatherUtil(InputStream inStream) {

if (inStream != null) {

this.inStream = inStream;

DocumentBuilderFactory domfac = DocumentBuilderFactory.newInstance();

try {

DocumentBuilder domBuilder = domfac.newDocumentBuilder();

Document doc = domBuilder.parse(inStream);

root = doc.getDocumentElement();

} catch (ParserConfigurationException e) {

e.printStackTrace();

} catch (SAXException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}
}
}

public WeatherUtil(String path) {

InputStream inStream = null;

try {

inStream = new FileInputStream(path);

} catch (FileNotFoundException e1) {

e1.printStackTrace();

}

if (inStream != null) {

this.inStream = inStream;

DocumentBuilderFactory domfac = DocumentBuilderFactory.newInstance();

try {

DocumentBuilder domBuilder = domfac.newDocumentBuilder();

Document doc = domBuilder.parse(inStream);

root = doc.getDocumentElement();

} catch (ParserConfigurationException e) {

e.printStackTrace();

} catch (SAXException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}
}
}

public WeatherUtil(URL url) {

InputStream inStream = null;

try {

inStream = url.openStream();

} catch (IOException e1) {

e1.printStackTrace();

}

if (inStream != null) {

this.inStream = inStream;

DocumentBuilderFactory domfac = DocumentBuilderFactory.newInstance();

try {

DocumentBuilder domBuilder = domfac.newDocumentBuilder();

Document doc = domBuilder.parse(inStream);

root = doc.getDocumentElement();

} catch (ParserConfigurationException e) {

e.printStackTrace();

} catch (SAXException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}
}
}

/**
*
* @param nodes
* @return 单个节点多个值以分号分隔
*/
public Map<String, String> getValue(String[] nodes) {

if (inStream == null || root==null) {
return null;
}
Map<String, String> map = new HashMap<String, String>();
// 初始化每个节点的值为null
for (int i = 0; i < nodes.length; i++) {
map.put(nodes[i], null);
}
// 遍历第一节点
NodeList topNodes = root.getChildNodes();
if (topNodes != null) {
for (int i = 0; i < topNodes.getLength(); i++) {
Node book = topNodes.item(i);
if (book.getNodeType() == Node.ELEMENT_NODE) {
for (int j = 0; j < nodes.length; j++) {
for (Node node = book.getFirstChild(); node != null; node = node.getNextSibling()) {
if (node.getNodeType() == Node.ELEMENT_NODE) {
if (node.getNodeName().equals(nodes[j])) {
String val = node.getTextContent();
String temp = map.get(nodes[j]);
if (temp != null && !temp.equals("")) {
temp = temp + ";" + val;
}
4000
else {
temp = val;
}
map.put(nodes[j], temp);
}
}
}
}
}
}
}
return map;
}
/* public static void main(String[] args) throws UnsupportedEncodingException {
System.out.println("请输入您需要查询的地点:");
Scanner input = new Scanner(System.in);
String city = input.next();
String city_url = URLEncoder.encode(city, "GBK");
String link="http://php.weather.sina.com.cn/xml.php?city="+city_url+"&password=DJOYnieT8234jlsK&day=0";

URL url;

try {

url = new URL(link);
WeatherUtil parser = new WeatherUtil(url);
String[] nodes = {"city","status1","temperature1","status2","temperature2"};
Map<String, String> map = parser.getValue(nodes);
System.out.println(map.get(nodes[0])+" 今天白天："+map.get(nodes[1])+" 最高温度："+map.get(nodes[2])+"℃ 今天夜间："+map.get(nodes[3])+" 最低温度："+map.get(nodes[4])+"℃ ");
} catch (MalformedURLException e) {
e.printStackTrace();
}

}  */

}

controller中ajax方法
//天气预报(AJAX)
@RequestMapping("weather")
public void weather(HttpSession session,HttpServletResponse response) throws Exception{

String city_url = URLEncoder.encode("昆山", "GBK");       //定义需要获取天气信息的城市和编码格式
String link="http://php.weather.sina.com.cn/xml.php?city="+city_url+"&password=DJOYnieT8234jlsK&day=0";  //气象台接口地址

URL url;  //声明地址对象

try {
url = new URL(link);  //生成url
WeatherUtil parser = new WeatherUtil(url);  //将url交给工具类处理返回天气信息
String[] nodes = {"city","status1","temperature1","status2","temperature2"};  //定义一个接受天气信息的字符串数组
Map<String, String> map = parser.getValue(nodes);                             //天气信息转换为Map对象
String weather=map.get(nodes[0])+" 今天白天："+map.get(nodes[1])+" 最高温度："+map.get(nodes[2])+"℃ 今天夜间："+map.get(nodes[3])+" 最低温度："+map.get(nodes[4])+"℃ "; //便利数据生成信息字符串
//System.out.println(weather);
response.setCharacterEncoding("utf-8");
response.getWriter().println(weather);      //使用AJAX将天气信息返回
session.setAttribute("weather", weather);   //防止丢失将天气信息同时放入session中

} catch (MalformedURLException e) {
e.printStackTrace();
}

}

$(function(){

$.ajax({
url:'weather.htm',
type:"post",
async:false,
dataType:"text",
success:function(data){
document.getElementById("weather").innerHTML=data;
}

});
}