xml转json

<dependency>
    <groupId>net.sf.json-lib</groupId>
    <artifactId>json-lib</artifactId>
    <version>2.2.2</version>
    <classifier>jdk15</classifier>
</dependency>
<dependency>
    <groupId>xom</groupId>
    <artifactId>xom</artifactId>
    <version>1.2.5</version>
</dependency>

 public static String toJSONString(String xml){
    XMLSerializer xmlSerializer = new XMLSerializer();
    String resutStr = xmlSerializer.read(xml).toString(0);//0表示去除换行空格等，1以上表示json格式化后的数据
    return resutStr;
}

<ap>
<plain>
<mchnt_cd>0006410F0026868</mchnt_cd>
<mchnt_txn_ssn>900123456789</mchnt_txn_ssn>
<resp_code>0000</resp_code>
<resp_desc>成功</resp_desc>
<login_id>15869696969</login_id>
</plain>
<signature>auK8wfMTw</signature>
</ap>
11:03:43.935 [main] INFO net.sf.json.xml.XMLSerializer - Using default type string
{
 "plain":  {
  "mchnt_cd": "0006410F0026868",
  "mchnt_txn_ssn": "900123456789",
  "resp_code": "0000",
  "resp_desc": "成功",
  "login_id": "15869696969"
 },
 "signature": "auK8wfMTw"
}