java socket测试webservice是否可连接

如果要事先测试webservice服务是否可用，可以用java socket连接wsdl地址,相当于模拟浏览器输入wsdl地址。
我在本机上发布了一个webservice，用于下载文件，wsdl是：
http://127.0.0.1:8080/FileWS/services/downloadFile?wsdl

Socket socket = new Socket("127.0.0.1",8080); 
         
        OutputStream os = socket.getOutputStream(); 
        InputStream is = socket.getInputStream(); 
         
        String httpSend = "POST /FileWS/services/downloadFile?wsdl  HTTP/1.1\r\n" 
                        + "Content-Type:text/xml\r\n" 
                        + "Host:127.0.0.1:8080\r\n" 
                        + "Content-Length:454\r\n" 
                        + "\r\n" 
                        + "<SOAP-ENV:Envelope xmlns:SOAP-ENV=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:SOAP-ENC=\"http://schemas.xmlsoap.org/soap/encoding/\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\">" 
                        +   "<SOAP-ENV:Body>" 
                        + " </SOAP-ENV:Body>" 
                        + "</SOAP-ENV:Envelope>"; 
        os.write(httpSend.getBytes()); 
        os.flush(); 
 
        InputStreamReader ireader = new InputStreamReader(is); 
        java.io.BufferedReader breader = new java.io.BufferedReader(ireader); 
         
        String responseLine = ""; 
         
        while(!(responseLine = breader.readLine()).equals("")) 
        { 
            System.out.println(responseLine); 
        } 
         
        System.out.println(""); 
         
        while(!(responseLine = breader.readLine()).equals("")) 
        { 
            System.out.println(responseLine); 
        } 
启动webservice，运行该代码，就会打印。如果看到http/1.1 200 ok，就连接成功了。控制台输出的内容和在浏览器输入wsdl地址得到的内容一致。如果有error，注意检查自己的wsdl是否可以在浏览器正确输出，监测发送的字符串，注意转义字符等等。