<dependency> <groupId>org.json</groupId> <artifactId>json</artifactId> <version>20160810</version> </dependency>

更多版本见http://mvnrepository.com/artifact/org.json/json

import org.json.JSONObject;
import org.json.XML;

作者：robinzhang13
链接：https://www.jianshu.com/p/d54e5bc34c9f
来源：简书
著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。

public static String readFile(String path) throws Exception {
    File file=new File(path);
    FileInputStream fis = new FileInputStream(file);
    FileChannel fc = fis.getChannel();
    ByteBuffer bb = ByteBuffer.allocate(new Long(file.length()).intValue());
    //fc向buffer中读入数据
    fc.read(bb);
    bb.flip();
    String str=new String(bb.array(),"UTF8");
    fc.close();
    fis.close();
    return str;

}

public static void xmlStrToJsonStr(String xml) throws Exception {

   
    String filename="C:\\Users\\admin\\Desktop\\test2.xml";
    String xmlStr2= readFile(filename);
    org.json.JSONObject jsonObj = XML.toJSONObject(xmlStr2);
    System.out.println(jsonObj);

}