JAXB学习笔记(二)

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;

/**
* <p>看个类型转换</p>
*/
@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;

/**
* <p>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</p>
* <pre>
public abstract class XmlAdapter<ValueType, BoundType>
{
public abstract BoundType unmarshal(ValueType paramValueType)
    throws Exception;

public abstract ValueType marshal(BoundType paramBoundType)
    throws Exception;
}
* <pre>
*/
public class DateXmlAdapter extends XmlAdapter<String, Date> {

    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");

    /**
     * 将xml中的值转换为bean中的对象
     */
    @Override
    public Date unmarshal(String paramValueType) throws Exception {
        return format.parse(paramValueType);
    }

    /**
     * 将bean中的对象转换为xml字符串
     */
    @Override
    public String marshal(Date paramBoundType) throws Exception {
&nbs

补充：软件开发 , Java ,