通过邮编获取城市

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;

public class Test {
public static void main(String[] args) throws IOException {
InputStreamReader isr = new InputStreamReader(System.in);
System.out.println("请输入要查询的邮政编号");
BufferedReader br = new BufferedReader(isr);
String str = br.readLine();
br.close();
URL url = new URL("http://opendata.baidu.com/post/s?wd="+str);
URLConnection hul = url.openConnection();
InputStream is = hul.getInputStream();
byte[] by = new byte[1024];
int len = 0;
String address = null;
while((len=is.read(by))!=-1){
address += new String(by,0,len,"GBK");
}
try {
System.out.println(address.substring(address.indexOf("</em>：")+6,address.indexOf("</h3>")));
} catch (Exception e) {
System.out.println("对不起，您的输入有误");
}
}

}

输入邮编可以获得对应的城市地址