一、XmlElements的應用：(可用于子類和父類之間)

package my.test.xml.aaaxml;import javax.xml.bind.JAXBContext; import javax.xml.bind.Marshaller; import javax.xml.bind.annotation.XmlAccessType; import javax.xml.bind.annotation.XmlAccessorType; import javax.xml.bind.annotation.XmlElement; import javax.xml.bind.annotation.XmlElements; import javax.xml.bind.annotation.XmlRootElement;public class Test {public static void main(String[] args) throws Exception {Address1 address1 = new Address1();address1.setCity1("beijing");Address2 address2 = new Address2();address2.setCity2("beijing");Dog dog = new Dog();dog.setName("godName");dog.setAddress(address2);JAXBContext context = JAXBContext.newInstance(Dog.class);Marshaller marshaller = context.createMarshaller();marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);marshaller.marshal(dog, System.out);}}@XmlRootElement @XmlAccessorType(XmlAccessType.FIELD) class Dog {private String name;@XmlElements({ @XmlElement(name = "address1", type = Address1.class),@XmlElement(name = "address2", type = Address2.class), })private Object address;public Object getAddress() {return address;}public void setAddress(Object address) {this.address = address;}public String getName() {return name;}public void setName(String name) {this.name = name;}}@XmlAccessorType(XmlAccessType.FIELD) class Address1 {private String city1;public String getCity1() {return city1;}public void setCity1(String city1) {this.city1 = city1;}}@XmlAccessorType(XmlAccessType.FIELD) class Address2 {private String city2;public String getCity2() {return city2;}public void setCity2(String city2) {this.city2 = city2;}}

運行結果：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?> <dog><name>godName</name><address2><city2>beijing</city2></address2> </dog>

?二、XmlElementRef、XmlSeeAlso、XmlRootElement的配合使用：(可用于子類和父類之間)

package my.test.xml.aaaxml;import javax.xml.bind.JAXBContext; import javax.xml.bind.Marshaller; import javax.xml.bind.annotation.XmlAccessType; import javax.xml.bind.annotation.XmlAccessorType; import javax.xml.bind.annotation.XmlElementRef; import javax.xml.bind.annotation.XmlRootElement; import javax.xml.bind.annotation.XmlSeeAlso;public class Test {public static void main(String[] args) throws Exception {Address1 address1 = new Address1();address1.setCity1("beijing");Address2 address2 = new Address2();address2.setCity2("beijing");Dog dog = new Dog();dog.setName("godName");dog.setAddress(address1);JAXBContext context = JAXBContext.newInstance(Dog.class);Marshaller marshaller = context.createMarshaller();marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);marshaller.marshal(dog, System.out);}}@XmlRootElement @XmlAccessorType(XmlAccessType.FIELD) class Dog {private String name;@XmlElementRefprivate AbstractAddr address;public AbstractAddr getAddress() {return address;}public void setAddress(AbstractAddr address) {this.address = address;}public String getName() {return name;}public void setName(String name) {this.name = name;}}@XmlSeeAlso({ Address1.class, Address2.class }) class AbstractAddr {}@XmlRootElement @XmlAccessorType(XmlAccessType.FIELD) class Address1 extends AbstractAddr {private String city1;public String getCity1() {return city1;}public void setCity1(String city1) {this.city1 = city1;}}@XmlRootElement @XmlAccessorType(XmlAccessType.FIELD) class Address2 extends AbstractAddr {private String city2;public String getCity2() {return city2;}public void setCity2(String city2) {this.city2 = city2;}}　　　　　　　　　　

?運行結果：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?> <dog><name>godName</name><address1><city1>beijing</city1></address1> </dog>

?三、XmlRootElement、XmlElementRef（可以用于父類和子類之間）

package my.test.xml.aaaxml;import javax.xml.bind.JAXBContext; import javax.xml.bind.Marshaller; import javax.xml.bind.annotation.XmlAccessType; import javax.xml.bind.annotation.XmlAccessorType; import javax.xml.bind.annotation.XmlElementRef; import javax.xml.bind.annotation.XmlRootElement;public class Test {public static void main(String[] args) throws Exception {Address1 address1 = new Address1();address1.setCity1("beijing");Address2 address2 = new Address2();address2.setCity2("beijing");Dog dog = new Dog();dog.setName("godName");dog.setAddress(address1);JAXBContext context = JAXBContext.newInstance(Dog.class, dog.getAddress().getClass());Marshaller marshaller = context.createMarshaller();marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);marshaller.marshal(dog, System.out);}}@XmlRootElement @XmlAccessorType(XmlAccessType.FIELD) class Dog {private String name;@XmlElementRefprivate AbstractAddr address;public AbstractAddr getAddress() {return address;}public void setAddress(AbstractAddr address) {this.address = address;}public String getName() {return name;}public void setName(String name) {this.name = name;}}// @XmlSeeAlso({ Address1.class, Address2.class }) class AbstractAddr {}@XmlRootElement @XmlAccessorType(XmlAccessType.FIELD) class Address1 extends AbstractAddr {private String city1;public String getCity1() {return city1;}public void setCity1(String city1) {this.city1 = city1;}}@XmlRootElement @XmlAccessorType(XmlAccessType.FIELD) class Address2 extends AbstractAddr {private String city2;public String getCity2() {return city2;}public void setCity2(String city2) {this.city2 = city2;}}

?

運行結果：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?> <dog><name>godName</name><address1><city1>beijing</city1></address1> </dog>

?

四、 動態的生成根節點元素名稱（JAXBElement）

package my.test.xml.aaaxml;import javax.xml.bind.JAXBContext; import javax.xml.bind.JAXBElement; import javax.xml.bind.Marshaller; import javax.xml.bind.annotation.XmlAccessType; import javax.xml.bind.annotation.XmlAccessorType; import javax.xml.bind.annotation.XmlElementRef; import javax.xml.bind.annotation.XmlRootElement; import javax.xml.bind.annotation.XmlSeeAlso; import javax.xml.namespace.QName;public class Test {public static void main(String[] args) throws Exception {Address1 address1 = new Address1();address1.setCity1("beijing");Address2 address2 = new Address2();address2.setCity2("beijing");Dog dog = new Dog();dog.setName("godName");dog.setAddress(address1);JAXBContext context = JAXBContext.newInstance(Dog.class);Marshaller marshaller = context.createMarshaller();marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);QName qName = new QName("dogas");JAXBElement<Dog> dogElement = new JAXBElement<Dog>(qName, Dog.class, dog);marshaller.marshal(dogElement, System.out);}}@XmlRootElement @XmlAccessorType(XmlAccessType.FIELD) class Dog {private String name;@XmlElementRefprivate AbstractAddr address;public AbstractAddr getAddress() {return address;}public void setAddress(AbstractAddr address) {this.address = address;}public String getName() {return name;}public void setName(String name) {this.name = name;}@Overridepublic String toString() {return "Dog [name=" + name + ", address=" + address + "]";}}@XmlSeeAlso({ Address2.class, Address1.class }) class AbstractAddr {}@XmlRootElement @XmlAccessorType(XmlAccessType.FIELD) class Address1 extends AbstractAddr {private String city1;public String getCity1() {return city1;}public void setCity1(String city1) {this.city1 = city1;}@Overridepublic String toString() {return "Address1 [city1=" + city1 + "]";}}@XmlRootElement @XmlAccessorType(XmlAccessType.FIELD) class Address2 extends AbstractAddr {private String city2;public String getCity2() {return city2;}public void setCity2(String city2) {this.city2 = city2;}@Overridepublic String toString() {return "Address2 [city2=" + city2 + "]";}}

?運行結果：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?> <dogas><name>godName</name><address1><city1>beijing</city1></address1> </dogas>

?五、動態的生成根節點元素名稱和非根節點元素名稱（JAXBElement、XmlRegistry、XmlElementRef、XmlElementDecl）

package my.test.xml.aaaxml;import javax.xml.bind.JAXBContext; import javax.xml.bind.JAXBElement; import javax.xml.bind.Marshaller; import javax.xml.bind.annotation.XmlAccessType; import javax.xml.bind.annotation.XmlAccessorType; import javax.xml.bind.annotation.XmlElementDecl; import javax.xml.bind.annotation.XmlElementRef; import javax.xml.bind.annotation.XmlRegistry; import javax.xml.bind.annotation.XmlSeeAlso; import javax.xml.namespace.QName;public class Test {public static void main(String[] args) throws Exception {Address1 address1 = new Address1();address1.setCity1("beijing");QName q1Name = new QName("addressas");JAXBElement<?> address1Element = new JAXBElement<Address1>(q1Name, Address1.class, address1);Address2 address2 = new Address2();address2.setCity2("beijing");Dog dog = new Dog();dog.setName("godName");dog.setAddress((JAXBElement<AbstractAddr>) address1Element);JAXBContext context = JAXBContext.newInstance(Dog.class, ObjectFactory.class);Marshaller marshaller = context.createMarshaller();marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);QName qName = new QName("dogas");JAXBElement<Dog> dogElement = new JAXBElement<Dog>(qName, Dog.class, dog);marshaller.marshal(dogElement, System.out);}}@XmlAccessorType(XmlAccessType.FIELD) class Dog {private String name;@XmlElementRef(name = "address")private JAXBElement<AbstractAddr> address;public JAXBElement<AbstractAddr> getAddress() {return address;}public void setAddress(JAXBElement<AbstractAddr> address) {this.address = address;}public String getName() {return name;}public void setName(String name) {this.name = name;}@Overridepublic String toString() {return "Dog [name=" + name + ", address=" + address + "]";}}@XmlRegistry class ObjectFactory {@XmlElementDecl(name = "address")public JAXBElement<AbstractAddr> createAddress() {return null;} }@XmlSeeAlso({ Address2.class, Address1.class }) class AbstractAddr {}class Address1 extends AbstractAddr {private String city1;public String getCity1() {return city1;}public void setCity1(String city1) {this.city1 = city1;}@Overridepublic String toString() {return "Address1 [city1=" + city1 + "]";}}class Address2 extends AbstractAddr {private String city2;public String getCity2() {return city2;}public void setCity2(String city2) {this.city2 = city2;}@Overridepublic String toString() {return "Address2 [city2=" + city2 + "]";}}

運行結果：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?> <dogas><name>godName</name><addressas><city1>beijing</city1></addressas> </dogas>

?

轉載于:https://www.cnblogs.com/erdanyang/p/10397438.html

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