code: @Test public void testParseUrl2(){
    String address="192.168.0.1";
    String backupAddress1="192.168.0.2";
    String backupAddress2="192.168.0.3";
    Map<String,String> parameters=new HashMap<String,String>();
    parameters.put("username","root");
    parameters.put("password","alibaba");
    parameters.put("port","10000");
    parameters.put("protocol","dubbo");
    URL url=UrlUtils.parseURL(address + "," + backupAddress1+ ","+ backupAddress2,parameters);
    assertEquals("192.168.0.1:10000",url.getAddress());
    assertEquals("root",url.getUsername());
    assertEquals("alibaba",url.getPassword());
    assertEquals(10000,url.getPort());
    assertEquals("dubbo",url.getProtocol());
    assertEquals("192.168.0.2" + "," + "192.168.0.3",url.getParameter("backup"));
  }
  