JAXB学习笔记(二) - JAVA

上个例子中人说Date类型序列化出的字符串不好看啊，那我们来处理一下;
需要使用注释 @XmlJavaTypeAdapter ,并且创造一个转换类

Java代码
package cn.uyunsky.blog.xml.demo2;

import java.io.StringReader;
import java.io.StringWriter;
import java.util.Date;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;

/**
*

看个类型转换

*/
@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Persion {

private Integer userid;
private String username;

@XmlJavaTypeAdapter(value = DateXmlAdapter.class)
private Date birthday;

public Integer getUserid() {
return userid;
}

public void setUserid(Integer userid) {
this.userid = userid;
}

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}

public Date getBirthday() {
return birthday;
}

public void setBirthday(Date birthday) {
this.birthday = birthday;
}

@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("Persion [userid=");
builder.append(userid);
builder.append(", username=");
builder.append(username);

builder.append(", birthday=");
builder.append(birthday);
builder.append("]");
return builder.toString();
}

public static void main(String[] args) {
try {
JAXBContext jaxbContext = JAXBContext.newInstance(Persion.class);
Persion persion = new Persion();

persion.setUserid(112);
persion.setUsername("就不告诉你");
persion.setBirthday(new Date());

Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

StringWriter writer = new StringWriter();
marshaller.marshal(persion, writer);
String xml = writer.getBuffer().toString();
System.out.println(xml);

Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
Object bean = unmarshaller.unmarshal(new StringReader(xml));
System.out.println(bean);

} catch (JAXBException e) {
e.printStackTrace();
}
}

}

转换类

Java代码
package cn.uyunsky.blog.xml.demo2;

import java.text.SimpleDateFormat;
import java.util.Date;

import javax.xml.bind.annotation.adapters.XmlAdapter;

/**
*

日期转换类,注意看XmlAdapter源码,使用泛型很方便,否则代码中需要Object的强制类型转换


 public abstract class XmlAdapter
 {
   public abstract BoundType unmarshal(ValueType paramValueType)
     throws Exception;
  
   public abstract ValueType marshal(BoundType paramBoundType)
     throws Exception;
 }
  * 
  */ 
 public class DateXmlAdapter extends XmlAdapter { 
      
     SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd"); 
  
     /**

JAXB学习笔记(二)(一)