通过以下代码可以根据网址获取网页的html数据，安卓中获取网络数据的时候会用到，而且会用Java中的sax方式解析获取到数据。(sax解析主要是解析xml)具体代码如下：
package com.wyl; import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection; public class HttpDownloadTest {
public static void main(String[] args) {
StringBuffer sb = new StringBuffer();
try {
//创建url对象
URL url = new URL("http://www.baidu.com");
//创建connection
URLConnection conn = url.openConnection();
//使用io流读取数据
InputStream ips = conn.getInputStream();
InputStreamReader reader = new InputStreamReader(ips);
BufferedReader br = new BufferedReader(reader);
// String s = br.readLine();
while(br.readLine()!=null){
//返回读取出来的结果
sb.append(br.readLine());
}
System.out.println(sb);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
实例2：
package wyl; import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection; public class httpdownloadtest {
public static void main(String[] args) {
// getSDPath();
// System.out.println("路径:"+getSDPath());
System.out.println("xml:"+getXml("http://www.weibo.com"));
System.out.println("======");
System.out.println("xml:"+getXml("http://www.baidu.com"));
}
/**
* 获取sd卡路径
* @return
*/
// public static String getSDPath(){
// return Environment.getExternalStorageDirectory().getPath();
// }
/**
* 根据网址获取转换后的xml
* @param dizhi
* @return
*/
public static String getXml(String dizhi){
BufferedReader bufferedreader;
String xml = "";
StringBuffer sb = new StringBuffer();
try {
URL url = new URL(dizhi);
//1 获取一个连接
URLConnection conn = url.openConnection();
//2 把inputStream封装成为BufferedReader,
bufferedreader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
while(bufferedreader.readLine()!=null){
//3 从缓冲流里读出数据
sb.append(bufferedreader.readLine());
}
//4 把StringBuffer转换为String
xml = sb.toString();
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return xml;
} }