java之解析DNS的SRV记录

1、导入相应的jar包

       导入sjava-2.1.6.jar包，今天上传资源有问题，下次传了之后再补充到这里。

2、关键代码

  

   

    

     

    
    

     

       public static List<String> resoveSrv(String query) {
     
    
   

    

     

    
    

     

       // String s = "ramuh.example.com";  // the inputted string, I need to obtain the Port to be added to this
     
    
   

    

     

    
    

     

       ArrayList<String> ret = new ArrayList<String>();
     
    
   

    

     

    
    

     

       // String query = "_rdp._tcp." + s;
     
    
   

    

     

    
    

     

       try{
     
    
   

    

     

    
    

     

       Record[] records = new Lookup(query,Type.SRV).run();  // returning null
     
    
   

    

     

    
    

     

       if(records != null && records.length > 0) {
     
    
   

    

     

    
    

     

       for(Record r : records) {
     
    
   

    

     

    
    

     

       SRVRecord srv = (SRVRecord)r;
     
    
   

    

     

    
    

     

       String hostname = srv.getTarget().toString().replaceFirst("\\.$", "");
     
    
   

    

     

    
    

     

       int port = srv.getPort();
     
    
   

    

     

    
    

     

       ret.add(hostname + ":" + port);
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     

       return ret;
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     

       else{
     
    
   

    

     

    
    

     

       return null;
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     

       } catch (TextParseException e) {
     
    
   

    

     

    
    

     

       return null;
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     

       }
     
    
  
 

2、4行是注释掉的

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原文链接：chenyu.blog.csdn.net/article/details/58588545