JSON到XML转换的Java实现
是否有现有的JAR可以从JSON转换为XML?
不是Java,而是纯XSLT 2.0实现 :
看一下FXSL 2.x库中的f:json-document()
。
使用此函数非常容易合并JSon并将其用作… XML。
例如,可以编写以下XPath表达式:
f:json-document($vstrParam)/Students/*[sex = 'Female']
让所有Students
孩子成为sex = 'Female'
这是完整的例子:
{ "teacher":{ "name": "Mr Borat", "age": "35", "Nationality": "Kazakhstan" }, "Class":{ "Semester": "Summer", "Room": null, "Subject": "Politics", "Notes": "We're happy, you happy?" }, "Students": { "Smith": {"First Name":"Mary","sex":"Female"}, "Brown": {"First Name":"John","sex":"Male"}, "Jackson": {"First Name":"Jackie","sex":"Female"} } , "Grades": { "Test": [ {"grade":"A","points":68,"grade":"B","points":25,"grade":"C","points":15}, {"grade":"C","points":2, "grade":"B","points":29, "grade":"A","points":55}, {"grade":"C","points":2, "grade":"A","points":72, "grade":"A","points":65} ] } }
将上述转换应用于任何XML文档(忽略)时,将生成正确的结果 :
Mary Female Jackie Female
您可以创建一个JSONObject ,然后使用org.json命名空间中的XML类将其转换为XML
将json字符串包装在对象中就像在构造函数中传递它一样简单
JSONObject o = new JSONObject(jsonString);
然后你可以使用XML类以XML格式获取它,如下所示:
String xml = org.json.XML.toString(o);
还有一种可能性:Jettison, http ://jettison.codehaus.org可以通过XML解析接口(stax XMLStreamReader)公开Json,它允许与只理解XML的系统集成。 它需要使用一个约定(badgerfish,或其他任何一个叫做)。
例如,XStream使用Jettison(或至少Badgerfish约定)来允许使用JSON。
但问题本身有点模糊:虽然你总是可以从一个转换到另一个(这真的是一件非常简单的事情),XML和JSON并不等同:没有一对一的无损generics映射。 因此,问题是:您打算如何处理结果,如何使用xml?
http://json-lib.sourceforge.net/
- 关于没有完全万无一失的一对一映射的上述要点是有效的,但我已经有了使用上述库将xml转换为json的良好体验。
您可能想尝试XStream。 看看http://x-stream.github.io/faq.html#JSON 。
您可以尝试https://github.com/lukas-krecan/json2xml ,它提供简单的JSON到XML转换。 它需要Jackson JSON解析器并使用它来发出SAX事件。
转换盒!!!
我正在使用Dimitre在他的回复中粘贴的JSON,并将其转换为XML。 让我们看看它是否适合你……
import org.json.me.JSONObject; import cjm.component.cb.xml.ToXML; public class Test { public static void main(String[] args) { try { JSONObject objectJSON = new JSONObject(); objectJSON.put("ROOT", (new JSONObject("{\"teacher\":{\"name\":\"Mr Borat\",\"age\":\"35\",\"Nationality\":\"Kazakhstan\"},\"Class\":{\"Semester\":\"Summer\",\"Room\":null,\"Subject\":\"Politics\",\"Notes\":\"We're happy, you happy?\"},\"Students\":{\"Smith\":{\"FirstName\":\"Mary\",\"sex\":\"Female\"},\"Brown\":{\"FirstName\":\"John\",\"sex\":\"Male\"},\"Jackson\":{\"FirstName\":\"Jackie\",\"sex\":\"Female\"}},\"Grades\":{\"Test\":[{\"grade\":\"A\",\"points\":68,\"grade\":\"B\",\"points\":25,\"grade\":\"C\",\"points\":15},{\"grade\":\"C\",\"points\":2,\"grade\":\"B\",\"points\":29,\"grade\":\"A\",\"points\":55},{\"grade\":\"C\",\"points\":2,\"grade\":\"A\",\"points\":72,\"grade\":\"A\",\"points\":65}]}}"))); System.out.println("JSON: " + objectJSON); StringBuilder xml = new ToXML().convertToXML(objectJSON, true); // Conversion Box!!!! System.out.println("XML: " + xml); } catch (Exception e) { e.printStackTrace(); } } }
输出:
JSON: {"ROOT":{"Students":{"Brown":{"FirstName":"John","sex":"Male"},"Jackson":{"FirstName":"Jackie","sex":"Female"},"Smith":{"FirstName":"Mary","sex":"Female"}},"Class":{"Subject":"Politics","Room":null,"Semester":"Summer","Notes":"We're happy, you happy?"},"Grades":{"Test":[{"points":15,"grade":"C"},{"points":55,"grade":"A"},{"points":65,"grade":"A"}]},"teacher":{"age":"35","name":"Mr Borat","Nationality":"Kazakhstan"}}} -------- JSON Detected -------- -------- XML created Successfully -------- XML: John Male Jackie Female Mary Female Politics null Summer We're happy, you happy? 15 C 55 A 65 A 35 Mr Borat Kazakhstan
StAXON可以使用带有默认模板的XSLT或StAX事件API将JSON转换为XML https://github.com/beckchr/staxon/wiki/Converting-JSON-to-XML
这是一个简单的例子:
输入文件:
{ "container":[ { "someString":"xxxxx", "someInteger":123, "someArrayElem":[ { "key":1111, "value":"One" }, { "key":2222, "value":"Two" } ] } ] }
import+代码:
import de.odysseus.staxon.json.JsonXMLConfig; import de.odysseus.staxon.json.JsonXMLConfigBuilder; import de.odysseus.staxon.json.JsonXMLInputFactory; import de.odysseus.staxon.xml.util.PrettyXMLEventWriter; import javax.xml.stream.XMLEventReader; import javax.xml.stream.XMLEventWriter; import javax.xml.stream.XMLOutputFactory; import java.io.StringWriter; StringWriter stringWriter = new StringWriter(); JsonXMLConfig config = new JsonXMLConfigBuilder().multiplePI(false).prettyPrint(false).build(); XMLEventReader reader = new JsonXMLInputFactory(config).createXMLEventReader(getClass().getClassLoader().getResourceAsStream("input.json")); XMLEventWriter writer = XMLOutputFactory.newInstance().createXMLEventWriter(stringWriter); writer = new PrettyXMLEventWriter(writer); writer.add(reader); String xml = stringWriter.getBuffer().toString();
OUTPUT:
xxxxx 123 1111 One 2222 Two
您可以使用json-lib ,它提供双向转换。