Question

我是java XML绑定的新手。

这是我的班级

import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;

/**
 * @author Martin Burchard
 * 
 */
@XmlRootElement(name = "user")
    public class User {
    private String id;
    private String nickname;
    private String email;
    private String password;

    @XmlElement(name = "id")
    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    @XmlElement(name = "nickname")
    public String getNickName() {
        return nickname;
    }

    public void setNickName(String nickname) {
        this.nickname = nickname;
    }

    @XmlElement(name = "email")
    public String getEMail() {
        return email;
    }

    public void setEMail(String email) {
        this.email = email;
    }

    @XmlElement(name = "password")
    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

}

在创建/注册用户期间，必须提供密码，但稍后，在要求用户信息时，XML不应包含密码元素。是否可以将Element定义为writeonly？

Answer 1

注意：我是EclipseLink JAXB (MOXy)主管，是JAXB 2 (JSR-222)专家组的成员。

MOXy的扩展名为@XmlReadOnly。注释为@XmlReadOnly的字段/属性将在unmarshal（读取）期间填充，但不会在编组期间写入。

用户

package forum10208143; import javax.xml.bind.annotation.XmlElement; import javax.xml.bind.annotation.XmlRootElement; import org.eclipse.persistence.oxm.annotations.XmlReadOnly; /** * @author Martin Burchard * */ @XmlRootElement(name = "user") public class User { private String id; private String nickname; private String email; private String password; @XmlElement(name = "id") public String getId() { return id; } public void setId(String id) { this.id = id; } @XmlElement(name = "nickname") public String getNickName() { return nickname; } public void setNickName(String nickname) { this.nickname = nickname; } @XmlElement(name = "email") public String getEMail() { return email; } public void setEMail(String email) { this.email = email; } @XmlElement(name = "password") @XmlReadOnly public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } }

<强> jaxb.properites

要将MOXy指定为JAXB提供程序，您需要在与域模型相同的程序包中添加名为jaxb.properties的文件，并使用以下条目：

javax.xml.bind.context.factory = org.eclipse.persistence.jaxb.JAXBContextFactory

<强>演示

package forum10208143; import java.io.File; import javax.xml.bind.*; public class Demo { public static void main(String[] args) throws Exception { JAXBContext jc = JAXBContext.newInstance(User.class); Unmarshaller unmarshaller = jc.createUnmarshaller(); File xml = new File("src/forum10208143/input.xml"); User user = (User) unmarshaller.unmarshal(xml); System.out.println(user.getPassword()); Marshaller marshaller = jc.createMarshaller(); marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); marshaller.marshal(user, System.out); } }

<强> input.xml中

<?xml version="1.0" encoding="UTF-8"?> <user> <id>jdoe</id> <nickname>Jane</nickname> <email>jane.doe@example.com</email> <password>secret</password> </user>

<强>输出

secret <?xml version="1.0" encoding="UTF-8"?> <user> <email>jane.doe@example.com</email> <id>jdoe</id> <nickname>Jane</nickname> </user>

Answer 2

据我所知，没有这样的选项，我建议您使用类似“ReadOnlyUser”的派生类，不包括密码字段。

Answer 3

我就这样做了：

我将访问类型设置为none，以便能够注释字段和属性。
然后使用返回 * *的方法注释password属性。
然后是另一个返回未加密密码的getter。

不知道它是否全部被接受，但到目前为止它都有效......

@XmlRootElement(name = "User")
@XmlAccessorType(XmlAccessType.NONE)
public class User {

...

private String password = null;
@XmlElement(required=false, name="password")
public String getPassword() { 
    return (password == null || password.isEmpty()) ? null : "**********"; 
}

@XmlTransient
public String getUnencryptedPassword() { 
    return this.password; 
}

注释@XmlElement只写？

3 个答案: