JAXB 注解列表

注解	使用范围	描述
@XmlAccessorOrder	包、类	控制类中字段和属性的顺序。
@XmlAccessorType	包、类	此注释提供对类中属性和字段的默认序列化的控制。
@XmlRootElement	类、枚举	将类或枚举类型映射到XML元素。此注释可与以下注释一起使用：XmlType、XmlEnum、XmlAccessorType、XmlAccessorOrder。
@XmlElement	字段	将JavaBean属性映射到从属性名称派生的XML元素
@XmlElementWrapper	字段	围绕XML表示生成包装器元素。这主要用于围绕集合生成包装XML元素。此注释可与以下注释一起使用：XmlElement、XmlElements、XmlElementRef、XmlElementRefs、XmlJavaTypeAdapter。
@XmlAttribute	字段	将JavaBean属性映射到XML属性。
@XmlValue	字段	将字段或属性映射到 XML 标记上的文本值。

JAXB 注解示例

xml文件根元素的定义

import javax.xml.bind.annotation.*;
import java.io.Serializable;
import java.util.List;@XmlRootElement(name = "Root")
@XmlAccessorType(XmlAccessType.FIELD)
public class Root implements Serializable {private static final long serialVersionUID = 1L;@XmlAttribute(name = "id")private String id;@XmlElementWrapper(name = "records")@XmlElement(name = "record")private List<Record> record;public String getId() {return id;}public void setId(String id) {this.id = id;}public List<Record> getRecord() {return record;}public void setRecord(List<Record> record) {this.record = record;}
}

子节点下的类定义

import javax.xml.bind.annotation.XmlElement;
import java.io.Serializable;
import java.util.List;public class Record implements Serializable {private static final long serialVersionUID = 1L;private List<Item> item;public List<Item> getItem() {return item;}@XmlElement(name = "item")public void setItem(List<Item> item) {this.item = item;}
}

import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlValue;
import java.io.Serializable;public class Item implements Serializable {private static final long serialVersionUID = 1L;private String id;private String dataType;private String perDataProId;private String value;public String getId() {return id;}@XmlAttribute(name = "id")public void setId(String id) {this.id = id;}public String getDataType() {return dataType;}@XmlAttribute(name = "dataType")public void setDataType(String dataType) {this.dataType = dataType;}public String getPerDataProId() {return perDataProId;}@XmlAttribute(name = "perDataProId")public void setPerDataProId(String perDataProId) {this.perDataProId = perDataProId;}public String getValue() {return value;}@XmlValuepublic void setValue(String value) {this.value = value;}
}

xml数据结构格式

<Root id="Root"><records><record id=""><item id="field1" dataType="java.lang.String" perDataProId="">1</item><item id="field2" dataType="java.lang.String" perDataProId="">2</item><item id="field3" dataType="java.lang.String" perDataProId="">3</item><item id="field4" dataType="java.lang.String" perDataProId="">4</item><item id="field6" dataType="java.lang.String" perDataProId="">6</item><item id="field7" dataType="java.lang.String" perDataProId="">7</item></record></records>
</Root>

javaBean和xml转换工具类

import cn.hutool.json.JSONUtil;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.List;public class BeanXmlUtils {/*** bean转xml* @param obj 需要转换的对象* @param load 对应的class* @param config isFormat:是否需要格式[默认:false],charSet:字符集[默认:utf-8],xmlHeader:是否需要xml头部[默认:false]**/public static String beanToXml(Object obj, Class<?> load,Object... config) {String xmlStr = null;try {boolean isFormat = false;String charSet = "utf-8";boolean xmlHeader = false;if (config.length>=1){isFormat = (Boolean) config[0];if (config.length>=2){charSet =  (String)config[1];}if (config.length>=3){xmlHeader = (Boolean)config[2];}}JAXBContext context = JAXBContext.newInstance(load);Marshaller marshaller = context.createMarshaller();marshaller.setProperty(Marshaller.JAXB_FRAGMENT, xmlHeader);marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, isFormat);marshaller.setProperty(Marshaller.JAXB_ENCODING,charSet);StringWriter writer = new StringWriter();marshaller.marshal(obj, writer);xmlStr = writer.toString();} catch (JAXBException e) {e.printStackTrace();}return xmlStr;}/*** xml转bean* @param str* @param load* @return T**/public  static <T>  T  xmlToBean(String str, Class<T> load) {Object object = null;try {JAXBContext context = JAXBContext.newInstance(load);Unmarshaller unmarshaller = context.createUnmarshaller();object = unmarshaller.unmarshal(new StringReader(str));} catch (JAXBException e) {e.printStackTrace();}return  (T)object;}public static void main(String[] args) {//xmlToBean();beanToXml();}private static void xmlToBean() {String xmlStr = "<Root id=\"Root\">\n" +"<records>\n" +"\t<record id=\"\">\n" +"\t<item id=\"field1\" dataType=\"java.lang.String\" perDataProId=\"\">1</item>\n" +"\t<item id=\"field2\" dataType=\"java.lang.String\" perDataProId=\"\">2</item>\n" +"\t<item id=\"field3\" dataType=\"java.lang.String\" perDataProId=\"\">3</item>\n" +"\t<item id=\"field4\" dataType=\"java.lang.String\" perDataProId=\"\">4</item>\n" +"\t<item id=\"field5\" dataType=\"java.lang.String\" perDataProId=\"\">5</item>\n" +"\t<item id=\"field6\" dataType=\"java.lang.String\" perDataProId=\"\">6</item>\n" +"\t<item id=\"field7\" dataType=\"java.lang.String\" perDataProId=\"\">7</item>\n" +"\t</record>\n" +"</records>\n" +"</Root>";Root root = xmlToBean(xmlStr, Root.class);System.out.println(JSONUtil.toJsonPrettyStr(root));}private static void beanToXml() {Root root = new Root();root.setId("Root");List<Record> records = new ArrayList<>();List<Item> items = new ArrayList<>();Item item = new Item();item.setId("itemCode");item.setDataType("java.lang.String");item.setPerDataProId("");item.setValue("TZ0001");Item item1 = new Item();item1.setId("itemName");item1.setValue("吹风机");items.add(item);items.add(item1);Record record = new Record();record.setItem(items);records.add(record);root.setRecord(records);String xmlStr = beanToXml(root, Root.class, false);System.out.println(xmlStr);}}