08.HttpUrlconnection方式调用

package com.rl.client;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.StringReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.Iterator;
import java.util.List;

import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

public class TestHttpURLConnection {

      public static void main(String[] args) throws URLException {
        URL url = new URL("http://127.0.0.1:8080/hello?wsdl");

        URLConnection uc = url.openConnection();

        HttpURLConnection httpuc = (HttpURLConnection) uc;

        httpuc.setDoInput(true);
        httpuc.setDoOutput(true);//开启输入输出
        httpuc.setRequestMethod("POST");
        httpuc.setRequestProperty("Content-Type", "text/xml;charset=UTF-8");
        String data = "<soapenv:Envelop xmlns:soapenv=\"http://schemas.xmlsoap.org/soap\">"
                + "<soapenv:Body>"
                + "<q0:sayBye>"
                + "<arg0>wangwu</arg0>"
                + "</q0:sayBye>"
                + "</soapenv:Body>"
                + "</soapenv:Envelope>";

        OutputStream  out  = httpuc.getOutputStream();
        out.write(data.getBytes());//已经把消息给写过去了.

        if(httpuc.getResponseCode()==200){
            InputStream in = httpuc.getInputStream();//通过输入流把消息接收完
            BufferedReader br = new BufferedReader(new InputStreamReader(in));
            //写Socket的那种输入流的方式来读它
            String line  = null;
            StringBuffer sb = new StringBuffer();
            while((line = br.readLine())!=null ){
                sb.append(line);
            }
            //StringBuffer是一个可变字符串,我们要把它变成一个文档来解析
            //java代码里面解析XML
            SAXReader reader = new SAXReader();
            Document doc = reader.read(new StringReader(sb.toString()));//它的返回值是一个文档对象Document
            List<Element> eList = doc.selectNodes("//return");
            for (Element element : eList) {
                System.out.println(element.getText());
            }
        }
    }
}