Question

我需要将Java pojo封送为xml，并且pojo是API的一部分，因此我无法进行任何更改，例如添加任何jaxb注释，是否还有其他方法可以将这些Java objecta转换为xml（例如任何API，例如Jackson等。）而无需使用注释。

Answer 1

您可以使用Stax解析器。

Device级（例如）：

public class Device {

    private String name;
    private String model;

    public Device(String name, String model) {
        this.name = name;
        this.model = model;
    }

    //Getters & Setters
}

使用XMLStreamWriter将 Object 解析为 xml ：

List<Device> deviceList = ...

StringWriter stringWriter= new StringWriter();
XMLStreamWriter xmlWriter = XMLOutputFactory
            .newFactory()
            .createXMLStreamWriter(stringWriter);

xmlWriter.writeStartDocument();
xmlWriter.writeCharacters("\n");
xmlWriter.writeStartElement("devices");     // write <devices>
xmlWriter.writeCharacters("\n");

for(Device d : deviceList){
    xmlWriter.writeCharacters("\t");
    xmlWriter.writeStartElement("device");  // write <device>
    xmlWriter.writeCharacters("\n\t\t");
    xmlWriter.writeStartElement("name");    // write <name>
    xmlWriter.writeCharacters(d.getName()); // write <name> value
    xmlWriter.writeEndElement();            // write </name>
    xmlWriter.writeCharacters("\n\t\t");
    xmlWriter.writeStartElement("model");   // write <model>
    xmlWriter.writeCharacters(d.getModel());// write <model> value
    xmlWriter.writeEndElement();            // write </name>
    xmlWriter.writeCharacters("\n\t");
    xmlWriter.writeEndElement();            // write </device>
    xmlWriter.writeCharacters("\n");
 }
 xmlWriter.writeEndElement();               // write </devices>
 xmlWriter.writeEndDocument();
 xmlWriter.close();

 System.out.println(stringWriter.toString());         // print result

结果：

<?xml version="1.0" ?>
<devices>
  <device>
    <name>iPhone</name>
    <model>6s</model>
  </device>
  <device>
    <name>iPhone</name>
    <model>7</model>
  </device>
  <device>
    <name>iPad</name>
    <model>2</model>
  </device>
</devices>

从Java pojo生成xml，而无需使用注释

1 个答案: