【XML】使用javax.xml.bind包实现bean-xml互转

this.addressList = addressList;

}

public User() {

super();

}

public User(int userId, String userName, String password, Date birthday,

double money) {

super();

this.userId = userId;

this.userName = userName;

this.password = password;

this.birthday = birthday;

this.money = money;

}

public int getUserId() {

return userId;

}

public void setUserId(int userId) {

this.userId = userId;

}

public String getUserName() {

return userName;

}

public void setUserName(String userName) {

this.userName = userName;

}

public String getPassword() {

return password;

}

public void setPassword(String password) {

this.password = password;

}

public Date getBirthday() {

return birthday;

}

public void setBirthday(Date birthday) {

this.birthday = birthday;

}

public double getMoney() {

return money;

}

public void setMoney(double money) {

this.money = money;

}

@Override

public String toString() {

return "User{" +

"xmnl='" + xmnl + '\'' +

", userId=" + userId +

", userName='" + userName + '\'' +

", password='" + password + '\'' +

", birthday=" + birthday +

", money=" + money +

", addressList=" + addressList +

", computers=" + computers +

'}';

}

}

定义一个Address类

package xmlUtil;

import javax.xml.bind.annotation.XmlType;

import java.io.Serializable;

/**

* @Author: 轻狂书生FS

* @Description:

* @CreateDate: 2019/3/29 10:29

* @Version: 1.0

*/

// 控制JAXB 绑定类中属性和字段的排序

@XmlType(propOrder = {

"city",

"province",

})

public class Address implements Serializable {

private String province;

private String city;

public String getProvince() {

return province;

}

public void setProvince(String province) {

this.province = province;

}

public String getCity() {

return city;

}

public void setCity(String city) {

this.city = city;

}

public Address(String province, String city) {

this.province = province;

this.city = city;

}

public Address() {

}

}

定义一个Computer类

package xmlUtil;

import java.io.Serializable;

import java.util.Date;

import javax.xml.bind.annotation.XmlAccessType;

import javax.xml.bind.annotation.XmlAccessorType;

import javax.xml.bind.annotation.XmlRootElement;

import javax.xml.bind.annotation.XmlType;

/**

* @Author: 轻狂书生FS

* @Description:

* @CreateDate: 2019/3/29 10:44

* @Version: 1.0

*/

@XmlAccessorType(XmlAccessType.FIELD)

@XmlRootElement(name = "Computer")

@XmlType(propOrder = { "brandName", "price" })

public class Computer implements Serializable {

private static final long serialVersionUID = 1L;

// 品牌名

private String brandName;

// 价格

private double price;

public Computer() {

super();

}

public Computer( String brandName,double price) {

super();

this.brandName = brandName;

this.price = price;

}

public String getBrandName() {

return brandName;

}

public void setBrandName(String brandName) {

this.brandName = brandName;

}

public double getPrice() {

return price;

}

public void setPrice(double price) {

this.price = price;

}

@Override

public String toString() {

return "Computer{" +

"brandName='" + brandName + '\'' +

", price=" + price +

'}';

}

}

此时给出最重要的进行Java对象和XML文件相互操作的核心代码XMLUtil.java，其中有着两种方式进行转换，一种是转换成对象和string类型的xml转换，一种是对象和xml文件进行转换。

package xmlUtil;

import java.io.FileNotFoundException;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import java.io.StringReader;

import java.io.StringWriter;

import javax.xml.bind.JAXBContext;

import javax.xml.bind.JAXBException;

import javax.xml.bind.Marshaller;

import javax.xml.bind.Unmarshaller;

/**

* 封装了XML转换成object，object转换成XML的代码

*

* @author Steven

*

*/

public class XMLUtil {

/**

* 将对象直接转换成String类型的 XML输出

*

* @param obj

* @return

*/

public static String convertToXml(Object obj) {

// 创建输出流

StringWriter sw = new StringWriter();

try {

// 利用jdk中自带的转换类实现

JAXBContext context = JAXBContext.newInstance(obj.getClass());

Marshaller marshaller = context.createMarshaller();

// 格式化xml输出的格式

marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT,

Boolean.TRUE);

// 将对象转换成输出流形式的xml

marshaller.marshal(obj, sw);

} catch (JAXBException e) {

e.printStackTrace();

}

return sw.toString();

}

/**

* 将对象根据路径转换成xml文件

*

* @param obj

* @param path

* @return

*/

public static void convertToXml(Object obj, String path) {

try {

// 利用jdk中自带的转换类实现

JAXBContext context = JAXBContext.newInstance(obj.getClass());

Marshaller marshaller = context.createMarshaller();

// 格式化xml输出的格式

marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT,

Boolean.TRUE);

// 将对象转换成输出流形式的xml

// 创建输出流

FileWriter fw = null;

try {

fw = new FileWriter(path);

} catch (IOException e) {

e.printStackTrace();

}

marshaller.marshal(obj, fw);

} catch (JAXBException e) {

e.printStackTrace();

}

}

@SuppressWarnings("unchecked")

/**

* 将String类型的xml转换成对象

*/

public static Object convertXmlStrToObject(Class clazz, String xmlStr) {

Object xmlObject = null;

try {

JAXBContext context = JAXBContext.newInstance(clazz);

// 进行将Xml转成对象的核心接口

Unmarshaller unmarshaller = context.createUnmarshaller();

StringReader sr = new StringReader(xmlStr);

xmlObject = unmarshaller.unmarshal(sr);

} catch (JAXBException e) {

e.printStackTrace();

}

return xmlObject;

}

@SuppressWarnings("unchecked")

/**

* 将file类型的xml转换成对象

*/

public static Object convertXmlFileToObject(Class clazz, String xmlPath) {

Object xmlObject = null;

try {

JAXBContext context = JAXBContext.newInstance(clazz);

Unmarshaller unmarshaller = context.createUnmarshaller();

FileReader fr = null;

try {

fr = new FileReader(xmlPath);

} catch (FileNotFoundException e) {

e.printStackTrace();

}

xmlObject = unmarshaller.unmarshal(fr);

} catch (JAXBException e) {

e.printStackTrace();

}

return xmlObject;

}

}

测试类：

package xmlUtil;

import java.util.ArrayList;

import java.util.Date;

import java.util.List;

/**

* @Author: 轻狂书生FS

* @Description:

* @CreateDate: 2019/3/29 10:31

* @Version: 1.0

*/

public class Test {

public static void main(String[] args) {

// 创建需要转换的对象

User user = new User(1, "Steven", "@sun123", new Date(), 1000.0);

List