本篇内容主要讲解“Java Socket应答怎么实现”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“Java Socket应答怎么实现”吧!
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HTTP/1.1表示这个HTTP服务器是1.1版，200是服务器对客户请求的应答状态码，OK是对应答状态码的解释，之后是这个文档的元信息和文档正文。(相关应答状态码和元信息的解释请参阅Inetrnet标准草案:RFC2616)。
Http.java import java.net.*; import java.io.*; import java.util.Properties; import java.util.Enumeration; public class Http { protected Socket client; protected BufferedOutputStream sender; protected BufferedInputStream receiver; protected ByteArrayInputStream byteStream; protected URL target; private int responseCode=-1; private String responseMessage=""; private String serverVersion=""; private Properties header = new Properties(); public Http() { } public Http(String url) { GET(url) ; } /* GET方法根据URL，会请求文件、数据库查询结果、程序运行结果等多种内容 */ public void GET(String url) { try { checkHTTP(url); openServer(target.getHost(),target.getPort() ); String cmd = "GET "+ getURLFormat(target) +" HTTP/1.0\r\n" + getBaseHeads()+"\r\n"; sendMessage(cmd); receiveMessage(); } catch(ProtocolException p) { p.printStackTrace(); return; } catch(UnknownHostException e) { e.printStackTrace(); return; } catch(IOException i) { i.printStackTrace(); return; } } /* * HEAD方法只请求URL的元信息，不包括URL本身。若怀疑本机和服务器上的 * 文件相同，用这个方法检查最快捷有效。 */ public void HEAD(String url) { try { checkHTTP(url); openServer(target.getHost(),target.getPort() ); String cmd = "HEAD "+getURLFormat(target)+" HTTP/1.0\r\n" +getBaseHeads()+"\r\n"; sendMessage(cmd); receiveMessage(); }catch(ProtocolException p) { p.printStackTrace(); return; }catch(UnknownHostException e) { e.printStackTrace(); return; }catch(IOException i) { i.printStackTrace(); return; } } /* * POST方法是向服务器传送数据，以便服务器做出相应的处理。例如网页上常用的 * 提交表格。 */ public void POST(String url,String content) { try { checkHTTP(url); openServer(target.getHost(),target.getPort() ); String cmd = "POST "+ getURLFormat(target) +"HTTP/1.0\r\n"+getBaseHeads(); cmd += "Content-type: application/x-www-form-urlencoded\r\n"; cmd += "Content-length: " + content.length() + "\r\n\r\n"; cmd += content+"\r\n"; sendMessage(cmd); receiveMessage(); }catch(ProtocolException p) { p.printStackTrace(); return; }catch(UnknownHostException e) { e.printStackTrace(); return; }catch(IOException i) { i.printStackTrace(); return; } } protected void checkHTTP(String url) throws ProtocolException { try { URL target = new URL(url); if(target==null || !target.getProtocol().toUpperCase().equals("HTTP") ) throw new ProtocolException("这不是HTTP协议"); this.target = target; } catch(MalformedURLException m) { throw new ProtocolException("协议格式错误"); } } /* * 与Web服务器连接。若找不到Web服务器，InetAddress会引发UnknownHostException * 异常。若Socket连接失败，会引发IOException异常。 */ protected void openServer(String host,int port) throws UnknownHostException,IOException { header.clear(); responseMessage=""; responseCode=-1; try { if(client!=null) closeServer(); if(byteStream != null) { byteStream.close(); byteStream=null; } InetAddress address = InetAddress.getByName(host); client = new Socket(address,port==-1?80:port); sender = new BufferedOutputStream(client.getOutputStream()); receiver = new BufferedInputStream(client.getInputStream()); }catch(UnknownHostException u) { throw u; }catch(IOException i) { throw i; } } /* 关闭与Web服务器的连接 */ protected void closeServer() throws IOException { if(client==null) return; try { client.close(); sender.close(); receiver.close(); } catch(IOException i) { throw i; } client=null; sender=null; receiver=null; } protected String getURLFormat(URL target) { String spec = "http:// +target.getHost(); if(target.getPort()!=-1) spec+=":"+target.getPort(); return spec+=target.getFile(); } /* 向Web服务器传送数据 */ protected void sendMessage(String data) throws IOException{ sender.write(data.getBytes(),0,data.length()); sender.flush(); } /* 接收来自Web服务器的数据 */ protected void receiveMessage() throws IOException{ byte data[] = new byte[1024]; int count=0; int word=-1; // 解析***行 while( (word=receiver.read())!=-1 ) { if(word=='\r'||word=='\n') { word=receiver.read(); if(word=='\n') word=receiver.read(); break; } if(count == data.length) data = addCapacity(data); data[count++]=(byte)word; } String message = new String(data,0,count); int mark = message.indexOf(32); serverVersion = message.substring(0,mark); while( mark-1) { if(word=='\t') word=32; if(count==data.length) data = addCapacity(data); data[count++] = (byte)word; parseLine: { while( (symbol=receiver.read()) >-1 ) { switch(symbol) { case '\t': symbol=32; break; case '\r': case '\n': word = receiver.read(); if( symbol=='\r' && word=='\n') { word=receiver.read(); if(word=='\r') word=receiver.read(); } if( word=='\r' || word=='\n' || word>32) break parseLine; symbol=32; break; } if(count==data.length) data = addCapacity(data); data[count++] = (byte)symbol; } word=-1; } message = new String(data,0,count); mark = message.indexOf(':'); String key = null; if(mark>0) key = message.substring(0,mark); mark++; while( mark0) byteStream = new ByteArrayInputStream(data,0,count); data=null; closeServer(); } public String getResponseMessage() { return responseMessage; } public int getResponseCode() { return responseCode; } public String getServerVersion() { return serverVersion; } public InputStream getInputStream() { return byteStream; } public synchronized String getHeaderKey(int i) { if(i>=header.size()) return null; Enumeration enum = header.propertyNames(); String key = null; for(int j=0; j<=i; j++) key = (String)enum.nextElement(); return key; } public synchronized String getHeaderValue(int i) { if(i>=header.size()) return null; return header.getProperty(getHeaderKey(i)); } public synchronized String getHeaderValue(String key) { return header.getProperty(key); } protected String getBaseHeads() { String inf = "User-Agent: myselfHttp/1.0\r\n"+ "Accept: www/source; text/html; image/gif; */*\r\n"; return inf; } private byte[] addCapacity(byte rece[]){ byte temp[] = new byte[rece.length+1024]; System.arraycopy(rece,0,temp,0,rece.length); return temp; } public static void main(String[] args) { Http http=new Http(); //http.GET("http://192.168.1.5 ); int i; for (i=0; i<50000; i++) { http.GET("http://www.model-dl.com/modelinfo.asp?modelid=101 ); http.POST("http://www.model-dl.com/modelinfo.asp?modelid=101,"ratecontd=101&MM_insert=form1 "); } } } 到此，相信大家对“Java Socket应答怎么实现”有了更深的了解，不妨来实际操作一番吧！这里是创新互联网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！
