//報文發(fā)送

<dependency>
 <groupId>com.squareup.okhttp3</groupId>
 <artifactId>okhttp</artifactId>
 <version>3.8.0</version>
</dependency>
 
//報文解析

<dependency>
 <groupId>xom</groupId>
 <artifactId>xom</artifactId>
 <version>1.2.5</version>
</dependency>

<STUDENT> 
 <AGE>18</AGE>
 <NAME>
  <XING>趙</XING>
  <MING>明玉</MING>
 </NAME>
 <NAME>
 <XING>沙</XING>
  <MING>明德</MING>
 </NAME>
</STUDENT>

 StringBuffer strBuff = new StringBuffer();
 
 strBuff.append("<STUDENT>");
 strBuff.append("<AGE>18</AGE>");
 strBuff.append("<NAME>");
 strBuff.append("<XING>趙</XING>");
 strBuff.append("<MING>明玉</MING>");
 strBuff.append("</NAME>");
 strBuff.append("<NAME>");
 strBuff.append("<XING>沙</XING>");
 strBuff.append("<MING>明德</MING>");
 strBuff.append("</NAME>");
 strBuff.append("</STUDENT>");
 
 String xmlStr = strBuff.toString;

 public String postXml(String xmlStr){
 
 //可改變請求參數(shù)體編碼GBK/UTF-8
 RequestBody body= RequestBody.create(MediaType.parse("application/xml;charset=GBK"), xmlStr);
 //url為接口地址
 Request requestOk = new Request.Builder().url("http://192.168.0.103:8007").post(body).build();
 //網(wǎng)絡(luò)請求
 OkHttpClient client = new OkHttpClient.Builder().retryOnConnectionFailure(true).build();
 //可手動設(shè)置連接時長
 OkHttpClient client = new OkHttpClient().newBuilder().connectTimeout(60000, TimeUnit.MILLISECONDS)
   .readTimeout(60000, TimeUnit.MILLISECONDS)
   .build();
 //獲取處理結(jié)果  
 Response response = null;
 try {
  response = client.newCall(requestOk).execute();
 } catch (IOException e) {
  e.printStackTrace();
 }
 //獲取響應(yīng) 
 String jsonString = response.body().string();
 return jsonString；
 }

 //STUDENT為XML最大節(jié)點
 JAXBContext context = JAXBContext.newInstance(STUDENT.class);
 Unmarshaller unmarshaller = context.createUnmarshaller();
 
 //jsonString為報文響應(yīng)
 STUDENT student = (STUDENT)unmarshaller.unmarshal(new StringReader(jsonString));

//XmlRootElement注解是將類與XML元素進行映射，XML節(jié)點與屬性大小寫保持一致

@XmlRootElement(name ="STUDENT")
public class STUDENT implements Serializable {

 private String AGE;
 private List<NAME> NAME;
 
 public String getAGE() {
 return AGE;
 }

 public void setAGE(String AGE) {
 this.AGE = AGE;
 }

 public List<NAME> getNAME() {
 return NAME;
 }

 public void setNAME(List<NAME> NAME) {
 this.NAME = NAME;
 }

 @Override
 public String toString() {
 return "Cccc{" +
  "AGE='" + AGE + '\'' +
  ", NAME=" + NAME +
  '}';
 }
}

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.ConnectException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

/**
 * 發(fā)送HTTP的一種方法
 * GaoLiang
 */
public class HttpSendUtil {

 public static String xmlPost(String urlStr, String xmlInfo) {
  try {
   URL url = new URL(urlStr);
   URLConnection con = url.openConnection();
   con.setDoOutput(true);
//   con.setRequestProperty("Pragma:", "no-cache");
//   con.setRequestProperty("Cache-Control", "no-cache");
   // 一定要設(shè)置報文格式，否則發(fā)送失敗
   con.setRequestProperty("Content-Type", "text/xml");

   OutputStreamWriter out = null;
   try {
    out = new OutputStreamWriter(con.getOutputStream());
   } catch (ConnectException e) {
//    e.printStackTrace();
    return "Connection refused";
   }
//   System.out.println("urlStr=" + urlStr);
//   System.out.println("xmlInfo=" + xmlInfo);
   out.write(new String(xmlInfo.getBytes("ISO-8859-1")));
   out.flush();
   out.close();
   BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream()));
   StringBuilder stringBuilder = new StringBuilder();
   String line = "";
   for (line = br.readLine(); line != null; line = br.readLine()) {
//    System.out.println(line);
    stringBuilder.append(line);
   }
   return stringBuilder.toString();
  } catch (MalformedURLException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  }
  return null;
 }

// 請求的xml服務(wù)地址
String url = url;
// 請求參數(shù) 由于是手動拼寫的參數(shù)很長 看起來也不美觀就不放了（手動哭臉）
String param = "" ;
// 發(fā)送請求 調(diào)用上面的靜態(tài)方法
String ret = xmlPost(url,param);
// 得到的是xml格式的返回結(jié)果 但是里面的“<”,“>”都是“&lt;”,“&gt;”顯示 所以就需要解析，具體解析見下表
ret = ret.replaceAll("&lt;", "<");
ret = ret.replaceAll("&gt;", ">");
ret = ret.replaceAll("&amp;", "&");
ret = ret.replaceAll("&quot;", "\"");
ret = ret.replaceAll("&apos;", "\'");
// 因為接口最終要返回的是json格式 所以還要把想要的值取出來解析成String
// 解析 拿到節(jié)點里想要的值
Document document = DocumentHelper.parseText(ret);
// 根節(jié)點 這里不一定要和根節(jié)點取一樣的名字 可自定義 這么寫是方便理解
Element root = document.getRootElement();
// root節(jié)點下的子節(jié)點
Element business = root.element("business");

//解析完 取到business節(jié)點下的值
String healthCode = business.getStringValue();

// 拼接返回值
Map<String,Object> thisResult = new HashMap();
thisResult.put("healthCode",healthCode);
resultList.add(thisResult);

// 統(tǒng)一返回值
Map<String,Object> returnset = new HashMap<>();

<?xml version="1.0" encoding="utf-8" ?>
<Root>
<business>我想要的值:healthCode</business >
</Root>