java 需要帮助格式化 JAXB 输出
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/10534126/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Need help in formatting JAXB output
提问by Osama FelFel
I have some objects let's say two, A and B. These objects from the same class. I need to marshal these objects using JAXB and the output XML should be in this form:
我有一些对象，假设有两个，A 和 B。这些对象来自同一类。我需要使用 JAXB 编组这些对象，输出 XML 应采用以下形式：
<Root>
<A>
<ID> an id </ID>
</A>
<B>
<ID> an id </ID>
</B>
</Root>
<!-- Then all A and B attributes must be listed !-->
<A>
<ID> an id </ID>
<attribute1> value </attribute1>
<attribute2> value </attribute2>
</A>
<B>
<ID> an id </ID>
<attribute1> value </attribute1>
<attribute2> value </attribute2>
</B>
How to generate this format in JAXB? Any help is appreciated.
如何在 JAXB 中生成这种格式？任何帮助表示赞赏。
Update:To be more specific, Assume we have Human class like this:
更新：更具体地说，假设我们有这样的 Human 类：
@XmlRootElement
public class Human {
private String name;
private int age;
private Integer nationalID;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public Integer getNationalID() {
return nationalID;
}
public void setNationalID(Integer nationalID) {
this.nationalID = nationalID;
}
}
and our main class is:
我们的主要课程是：
public class Main3 {
public static void main(String[] args) throws JAXBException {
Human human1 = new Human();
human1.setName("John");
human1.setAge(24);
human1.setNationalID(Integer.valueOf(123456789));
JAXBContext context = JAXBContext.newInstance(Human.class);
Marshaller m = context.createMarshaller();
m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
StringWriter stringWriter = new StringWriter();
m.marshal(human1, stringWriter);
System.out.println(stringWriter.toString());
}
}
Then the output will be:
然后输出将是：
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<human>
<age>24</age>
<name>John</name>
<nationalID>123456789</nationalID>
</human>
Now I need the output to be like this:
现在我需要输出是这样的：
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<human>
<nationalID>123456789</nationalID>
</human>
<human>
<nationalID>123456789</nationalID>
<age>24</age>
<name>John</name>
</human>
And this will help me draw a tree of XML objects without the attributes (only by ID) and then but all the definitions below the tree. Is this possible using JAXB or any other implementation?
这将帮助我绘制一个没有属性的 XML 对象树（仅通过 ID），然后是树下的所有定义。这可以使用 JAXB 或任何其他实现吗？
回答by pXel
Try this:
试试这个：
import java.io.StringWriter;
import javax.xml.bind.Marshaller;
...
Object requestObject = ... // This is the object that needs to be printed with indentation
Marshaller marshaller = ...
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
StringWriter stringWriter = new StringWriter();
marshaller.marshal(requestObject, stringWriter);
System.out.println(stringWriter.toString());
回答by Ahmed Qasid
package com.namasoft.dms.gui.common.utilities;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.annotation.XmlAccessorOrder;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlElementWrapper;
import javax.xml.bind.annotation.XmlID;
import javax.xml.bind.annotation.XmlIDREF;
import javax.xml.bind.annotation.XmlRootElement;
public class JAXB
{
public static class Human
{
@XmlID
String id;
@XmlElement
String name;
@XmlElement
int age;
public Human()
{
}
public Human(String name)
{
this.id = this.name = name;
age = new Random().nextInt();
}
}
@XmlRootElement
public static class HumansList
{
@XmlElementWrapper(name = "humanObjects")
@XmlElement(name = "human")
List<Human> humanObjects = new ArrayList<>();
@XmlIDREF
@XmlElementWrapper(name = "humanIds")
@XmlElement(name = "id")
List<Human> humanIds = new ArrayList<>();
void addHuman(Human human)
{
humanObjects.add(human);
humanIds.add(human);
}
}
public static void main(String[] args) throws JAXBException
{
HumansList list = new HumansList();
Human parent1 = new Human("parent1");
list.addHuman(parent1);
Human child11 = new Human("child11");
list.addHuman(child11);
Human child12 = new Human("child12");
list.addHuman(child12);
Human parent2 = new Human("parent2");
list.addHuman(parent2);
Human child21 = new Human("child21");
list.addHuman(child21);
Human child22 = new Human("child22");
list.addHuman(child22);
JAXBContext context = JAXBContext.newInstance(HumansList.class);
Marshaller m = context.createMarshaller();
StringWriter xml = new StringWriter();
m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
m.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");
m.marshal(list, xml);
System.out.println(xml);
}
}
The output will be
输出将是
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<humansList>
<humanObjects>
<human>
<id>parent1</id>
<name>parent1</name>
<age>-486071665</age>
</human>
<human>
<id>child11</id>
<name>child11</name>
<age>920318383</age>
</human>
<human>
<id>child12</id>
<name>child12</name>
<age>-1355111983</age>
</human>
<human>
<id>parent2</id>
<name>parent2</name>
<age>-314154051</age>
</human>
<human>
<id>child21</id>
<name>child21</name>
<age>983544381</age>
</human>
<human>
<id>child22</id>
<name>child22</name>
<age>748252616</age>
</human>
</humanObjects>
<humanIds>
<id>parent1</id>
<id>child11</id>
<id>child12</id>
<id>parent2</id>
<id>child21</id>
<id>child22</id>
</humanIds>
</humansList>
