如何忽略StringBuffer中的双引号

Question

I am using StringBuffer to dynamically append the string, using \\ for ignoring single double (") but the proper result is not coming. Please help

Now

       "<?xml version=\"1.0\" encoding=\"UTF-8\"?>
        <tv time=\"10\" name=\"Main Gate\" id=\"9410\" device=\"smartTV\"> 
           <playlist name=\"Welcome\" id=\"56\">
           </playlist>
        </tv>"

Expected

       "<?xml version="1.0" encoding="UTF-8"?>
        <tv time="10" name="Main Gate" id="9410" device="smartTV"> 
           <playlist name="Welcome" id="56">
           </playlist>
        </tv>"

Below in java code

     StringBuffer stringBuffer = new StringBuffer("<?xml version=\"1.0\" 
                                               encoding=\"UTF-8\"?>");
      stringBuffer.append("<tv time=\"10\" device-name=\""+ 
                   device.getName() +"\" "
            + "device-id=\""+device.getDeviceHardId()+"\" 
                   device=\""+device.getDeviceType()+"\">");

    Playlist playlist = device.getPlaylist();
    if(playlist !=  null){

        stringBuffer.append("<playlist name=\""+playlist.getName()+"\" 
                 id=\""+playlist.getId() +"\">");
        stringBuffer.append("</playlist>");
    }

    stringBuffer.append("</tv>");

Answer 1

您的代码按预期工作，转义字符串是在 xml 中获取实际引号的方法，唯一的问题是您使用什么编译器来解析字符串，Java 按预期采用转义字符，但如果您使用的是其他类型的编辑器它可以以不同的方式处理它

Answer 2

produce type should be @Produces({ MediaType.APPLICATION_XML })

convert StringBuffer into String...

Now working fine for me.

@GET
@Path("xml")
@Consumes({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
@Produces({  MediaType.APPLICATION_XML })
public String GetXMl(){
  StringBuffer sb = new StringBuffer("<tv name=\"sony\"></tv>");
  String xml =sb.toString();
  return xml;
}

Answer 3

This is not a good practice. Instead of escaping the double quote everywhere why not use replace() method provided by String Object. Replace double quote with a unique identifier like '&quot'. At the end replace '&quot' with a double quote. Below snippet will demonstrate

    StringBuffer str = new StringBuffer();
    str.append("<?xml version=&quot1.0&quot encoding=&quotUTF-8&quot?><tv time=&quot10&quot name=&quot"+ device.getName() + "&quot id=&quot" + device.getDeviceHardId() + "&quot device=&quot"+ device.getDeviceType() + "&quot>");
    Playlist playlist2 = device.getPlaylist();
    if (playlist2 != null) {
        str.append("<playlist name=&quot" + playlist2.getName() + "&quot id=&quot" + playlist2.getId()+"&quot></playlist></tv>");
    }
    System.out.println(str.toString().replace("&quot", "\"")); //Will print the desired XML

Still, if you need your implementation, below code should work.

     StringBuffer stringBuffer = new StringBuffer("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
     stringBuffer.append("<tv time=\"10\" name=\"" + device.getName() + "\" " + "id=\"" + device.getDeviceHardId() + "\" device=\"" + device.getDeviceType() + "\">");
     Playlist playlist1 = device.getPlaylist();
     if (playlist1 != null) {
         stringBuffer.append("<playlist name=\"" + playlist1.getName() + "\" id=\"" + playlist1.getId() + "\">");
         stringBuffer.append("</playlist>");
     }
     stringBuffer.append("</tv>");

Edit : It's not a solution, it's a workaround. &qout is an example. Can be any unique stringset