java socket调用webservice以及如何解决连接重置报错问题

一、写这篇记录的原因：

最近看了一些关于关于socket模拟文件服务器的文章或者视频，客户端通过浏览器访问，服务端通过socket去实现，学习之下了解到就是向socket发送制定格式的内容【http协议】，然后服务端进行解析，返回相关的数据，于是就想肯定要可以使用socket模拟调用webservice【webservice就是http协议+soap报文通过tcp协议来传输】，当然了使用httpclient去模拟发送get/post请求最方便，不过也是自己对http协议深入理解【原来的理解就知道http协议是什么样的，但是具体发送的啥内容也模糊】

二、直接贴代码：

调用部分

package com.pjf.netbase;

import com.pjf.netentity.Response; import com.pjf.netservice.ClientService;

public class WebServiceClient { public final static int BYTELEN = 1024;// 经测试64个字节以上没有问题

public static void main(String[] args) throws Exception {

long startTime = System.currentTimeMillis();
String req = /*
* "<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n" +
*/ "<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">\r\n"
+ "<soap:Body>\r\n" + "<getSupportCity xmlns=\"http://WebXml.com.cn/\">\r\n"
+ "<byProvinceName>安徽</byProvinceName>\r\n" + "</getSupportCity>\r\n" + "</soap:Body>\r\n"
+ "</soap:Envelope>\r\n";

String head = "POST /WebServices/WeatherWebService.asmx HTTP/1.1\r\n" + "Host: www.webxml.com.cn\r\n"
+ "Content-Type: text/xml; charset=utf-8\r\n" + "Content-Length:" + req.getBytes().length + "\r\n"
+ "SOAPAction: \"http://WebXml.com.cn/getSupportCity\"\r\n\r\n";
Response res=ClientService.callWebService(head, req, "www.webxml.com.cn", 80);      if(res.getStatus().equals("999")){          System.out.println("连接异常，请检查连接");       }else{          System.out.println(res.toString());         }

}

}

2.Response对象定义

package com.pjf.netentity;

import java.util.HashMap; import java.util.Iterator; import java.util.Map;

/* * @author pengjf 作为调用webservice的返回对象封装 * */ public class Response { private String status;// 状态 private String statusNum; private String version;

public Response() {         status = "-999";    }

public String getStatusNum() {      return statusNum;   }

public void setStatusNum(String statusNum) {        this.statusNum = statusNum;     }

public String getVersion() {        return version;     }

public void setVersion(String version) {        this.version = version;     }

private Map<String, String> headMap = new HashMap<String, String>();// 头节点  private String resultSoapXml = "";// 解析内容

public String getStatus() {         return status;  }

public void setStatus(String status) {      this.status = status;   }

public Map<String, String> getHeadMap() {       return headMap;     }

public void setHeadMap(Map<String, String> headMap) {       this.headMap

= headMap; }

public String getResultSoapXml() {      return resultSoapXml;   }

public void setResultSoapXml(String resultSoapXml) {        this.resultSoapXml = resultSoapXml;     }

@Override   public String toString() {      String result = "";         Iterator iter = headMap.entrySet().iterator();      while (iter.hasNext()) {            Map.Entry entry = (Map.Entry) iter.next();          result += entry.getKey() + "-->" + entry.getValue() + "\r\n";       }

return status + " " + statusNum + " " + version + "\r\n" + result + "\r\n" + resultSoapXml;     } }

3.socket调用webservice以及返回数据的处理【整个调用以及处理的核心】

package com.pjf.netservice;

import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.net.Socket; import java.net.UnknownHostException;

import com.pjf.netentity.Response;

public class ClientService { public static int BYTELEN = 1024; public static Response callWebService(String head,String request,String host,int port) throws UnknownHostException, IOException{

Socket socket = new Socket(host, port); PrintWriter pw = new PrintWriter(socket.getOutputStream()); pw.println(head + request); pw.flush(); Response res=praseInputStrem(socket); pw.close(); pw=null; return res; }

public static Response praseInputStrem(Socket socket) {         Response res = new Response();      try {           long startTime = System.currentTimeMillis();            // 接受客户端的响应             byte[] b = new byte[BYTELEN];           byte[] context = null;          byte[] headbyte = null;             InputStream is = socket.getInputStream();           int len = 0;

int start_position = 0;             int end_position = 0;           int contlen = 0;            boolean isContinue = true;          boolean isFirstLine=true;           while ((len = is.read(b)) != -1) {
System.out.println("每次读取的长度：" + len);
// 解析内容
if (isContinue) {
// 针对头部信息，防止制定的字节一个byte[len]你不够，此处进行字节数组拼接
if (headbyte == null) {
headbyte = new byte[len];
System.arraycopy(b, 0, headbyte, 0, len);

} else {
byte[] tmp = new byte[headbyte.length + len];
System.arraycopy(headbyte, 0, tmp, 0, headbyte.length);
System.arraycopy(b, 0, tmp, headbyte.length, len);
headbyte = tmp;
b = tmp;

}

for (int i = start_position; i < b.length; i++) {
if (b[i] == '\r') {
end_position = i;
String data = new String(b, start_position, end_position - start_position);
if (isFirstLine) {
isFirstLine=false;
System.out.println(data);
String[] firstLineData = data.trim().split(" ");
if (firstLineData.length != 3) {
res.setStatus("999");
return res;
} else {
res.setStatus(firstLineData[2]);
res.setStatusNum(firstLineData[1]);
res.setVersion(firstLineData[0]);
}
}
// String data = new String(b, start_position,
// end_position - start_position);
if (data.contains("Content-Length")) {
// System.out.println("----contlen"+data);
contlen = Integer.parseInt(data.split(" ")[1]);
}
if(data.contains(":")){
String[] headsplit = data.split(":");
res.getHeadMap().put(headsplit[0].trim(),headsplit[1].trim());
}

System.out.println("每次读取输出的内容：" + data);
start_position = i + 2;
i = i + 1;
if (data.equals("")) {
isContinue = false;
System.out.println("内容准备读取,跳出循环准备全部去读");
break;
}

}

}
}
// 如果头结点已经读取完毕，则进行保留内存的内容结点
if (isContinue == false) {

4000
if (context == null) {
context = new byte[b.length - start_position];
if (b.length - start_position > 0) {
System.arraycopy(b, start_position, context, 0, b.length - start_position);
}
// 需要判断是否立即结束 ----针对于一次读完的情况,加入此判断，否则可能存在问题
if (len < BYTELEN) {
break;
}
} else {
byte[] tmp = new byte[context.length + len];
System.arraycopy(context, 0, tmp, 0, context.length);
System.arraycopy(b, 0, tmp, context.length, len);
context = tmp;
System.out.println((context.length) + "-------------" + contlen);
if (context.length == contlen) {// 表示数据读取完毕
break;

}
}

}

}           long endTime = System.currentTimeMillis();          System.out.println("使用时间：" + (endTime - startTime));            res.setResultSoapXml(new String(context));          socket.shutdownInput();             socket.shutdownOutput();            is.close();             is = null;          socket = null;          System.out.println("处理完毕");         } catch (IOException e) {           System.out.println(e);      }

return res;     }

}

三、测试结果：

OK 200 HTTP/1.1

Server–>Microsoft-IIS/6.0

Cache-Control–>private, max-age=0

X-AspNet-Version–>2.0.50727

Content-Length–>838

Date–>Tue, 12 Dec 2017 15

X-Powered-By–>ASP.NET

Content-Type–>text/xml; charset=utf-8