使用JAXB实现JAVA对象和XML字符串的互相转换

来源：互联网发布：企业工单管理系统源码编辑：程序博客网时间：2024/06/14 21:21

关于JAXB的介绍，见：http://blog.csdn.net/qq_32786873/article/details/71715254

测试类：

package com.solin.test;import java.util.ArrayList;import java.util.List;public class Test {public static void main(String[] args) {Student student = new Student();student.setName("邪恶小法师");student.setAge("110");student.setSex("男");List<Student.Friend> list = new ArrayList<>();Student.Friend f1 = new Student.Friend();f1.setName("德玛西亚之力");f1.setAge("888");f1.setSex("男");Student.Friend f2 = new Student.Friend();f2.setName("无双剑姬");f2.setAge("898");f2.setSex("女");list.add(f1);list.add(f2);student.setFriend(list);//将java对象转换为XML字符串String xmlStr = XmlAndJavaObjectConvert.convertToXml(student);System.out.println(xmlStr);//将xml字符串转换为java对象        System.out.println(XmlAndJavaObjectConvert.convertXmlStrToObject(Student.class, xmlStr));}}

实体类：

package com.solin.test;import java.util.List;import javax.xml.bind.annotation.XmlElementWrapper;import javax.xml.bind.annotation.XmlRootElement;import javax.xml.bind.annotation.XmlType;//XML文件中的根标识  @XmlRootElement(name = "Student") //控制JAXB 绑定类中属性和字段的排序  @XmlType(propOrder = {      "name",      "age",      "sex",      "friend"})  public class Student {private String name;private String age;private String sex;private List<Friend> friend;public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAge() {return age;}public void setAge(String age) {this.age = age;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}@XmlElementWrapper(name="friendList")public List<Friend> getFriend() {return friend;}public void setFriend(List<Friend> friend) {this.friend = friend;}@Overridepublic String toString() {return "Student [name=" + name + ", age=" + age + ", sex=" + sex + ", friendList=" + friend + "]";}public static class Friend{private String name;private String age;private String sex;public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAge() {return age;}public void setAge(String age) {this.age = age;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}@Overridepublic String toString() {return "Friend [name=" + name + ", age=" + age + ", sex=" + sex + "]";}}}

工具类：

package com.solin.test;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;public class XmlAndJavaObjectConvert {/**      * 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;      }  }

输出结果如下：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?><Student>    <name>邪恶小法师</name>    <age>110</age>    <sex>男</sex>    <friendList>        <friend>            <age>888</age>            <name>德玛西亚之力</name>            <sex>男</sex>        </friend>        <friend>            <age>898</age>            <name>无双剑姬</name>            <sex>女</sex>        </friend>    </friendList></Student>Student [name=邪恶小法师, age=110, sex=男, friendList=[Friend [name=德玛西亚之力, age=888, sex=男], Friend [name=无双剑姬, age=898, sex=女]]]

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