手把手教你SOAP访问webservice并DOM解析返回的XML数据（转）

http://blog.csdn.net/u012534831/article/details/51357111

前言：
目前我们项目组还在采用webservice这种http方式，并且某些网站服务提供的对外接口还在采用webservice方式，因此就总结了一下写了这篇文章。

以soap1.2的请求为例，在例子里我们传进去用户名和密码给服务，服务返回一个xml数据。
首先我们来开一下soap1.2的request，

//wsdl,例：OrderApp.asmx
POST /******App.asmx HTTP/1.1
//这儿填写服务地址
Host: 100.100.100.100
Content-Type: application/soap+xml; charset=utf-8
Content-Length: length

<?xml version="1.0" encoding="utf-8"?>
<soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
<soap12:Body>
<Login xmlns="我的项目">
<UserName>string</UserName>
<PassWord>string</PassWord>
</Login>
</soap12:Body>
</soap12:Envelope>

接下来，我们在代码里拼接请求体：

/**
* arg1为第一个参数键，arg2为第一个参数值，arg3为第二个参数键，arg4为第二个参数值,
*method为方法名，xmlns为命名空间 */
public void initSoap(String arg1,String arg2,String arg3,String arg4,String method,String xmlns) {
String soapRequestData = "<?xml version=\"1.0\"       encoding=\"utf-8\"?>"
+ "<soap12:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\""
+ " xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\""
+ " xmlns:soap12=\"http://www.w3.org/2003/05/soap-envelope\">"
+ " <soap12:Body>"
+ "<"+method+""+"xmlns="+"\""+xmlns+"\""
//                + " <Login xmlns=\"我的项目\">"
+ "<"+arg1+">"+arg2+"</"+arg1+">"
+ "<"+arg3+">"+arg4+"</"+arg3+">"
//                + " <UserName>"+"YQPIS0670"+"</UserName>"
//                + " <PassWord>"+"YQPIS0670"+"</PassWord>"
+ " </Login>"
+ "</soap12:Body>"
+ " </soap12:Envelope>";
}

第二步，开启线程并执行访问

new Thread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
PostMethod postMethod = new PostMethod(
"服务地址，即上面request中的host+端口号+post");
// 然后把Soap请求数据添加到PostMethod中
byte[] b = null;
try {
b = soapRequestData.getBytes("utf-8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
InputStream is = new ByteArrayInputStream(b, 0, b.length);
RequestEntity re = new InputStreamRequestEntity(is,
b.length, "application/soap+xml; charset=utf-8");
postMethod.setRequestEntity(re);
// 最后生成一个HttpClient对象，并发出postMethod请求
HttpClient httpClient = new HttpClient();
try {
int statusCode = httpClient.executeMethod(postMethod);
if (statusCode == 200) {
Log.d("soapRequestData", "调用成功！");
StringBuffer buffer = new StringBuffer();
// 解析器 工厂类
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
//返回流式数据
InputStream soapResponseData = postMethod
.getResponseBodyAsStream();
Document dm = db.parse(soapResponseData);
// element和node是同一概念
// 不同的是element提供更多方法
if (dm.getElementsByTagName("Root").item(0)
.getFirstChild() != null) {
// j是Root即根节点下面节点个数
for (int j = 0; j < dm  .getElementsByTagName("Root").item(0)
.getChildNodes().getLength(); j++) {
String result3 = dm.getElementsByTagName("Root")                                 .item(0).getChildNodes().item(j).getTextContent();
buffer.append(result3);
}
}
} else {
Log.d("soapRequestData", "调用失败！错误码：" + statusCode);
}
} catch (HttpException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}).start();

大家可以看下我的xml数据：

<Root>
<Result>1</Result>
<Message>登录成功</Message>
<MemberIDCard>YQPIS0670</MemberIDCard>
<UserName>祁宏涛</UserName>
<Birthday>2010-11-04</Birthday>
<Photo>...</Photo>
<Telephone/>
<MemberState>当前会员</MemberState>
<MemberStatus>友情会籍</MemberStatus>
<MemberSex>12ee640d-a037-497e-966e-91fc2186c8b4</MemberSex>
<Nationality>175f0624-29d1-4b88-9d97-d72ebb1e6a1c</Nationality>
<MemberSexMemo>男</MemberSexMemo>
<NationalityMemo>中国</NationalityMemo>
</Root>

如果有多层节点，可以自己修改dm.getElementsByTagName(“Root”) .item(0).getChildNodes().item(j).getTextContent()
为dm.getElementsByTagName(“Root”) .item(0).getChildNodes().item(j).getChildNodes().item(k).getTextContent();即为3层节点的属性值。