使用的javax这个jar下的类，JAXB（Java Architecture for XML Binding) 这个java和xml的互转标准如果感兴趣可以自行百度这里就不介绍概念，直接上代码。
首先是工具类，这里比较简单，就没做生成实体文件，就是两个，一个对像转xml，一个xml转对像。
import javax.xml.bind.JAXBContext;
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.HashMap;
import java.util.List;
import java.util.Map;
/**
* @desc: xml 工具类
* @author: wangzhh
* @date: 2019-06-13
*/
public class XmlUtils {
/**
* Description bean对像转换为xml字符串，
* 对像属性如果不设置值，xml字符串没有节点，如果需要空节点，可以设置为空字符串
* @param obj 需要转换的对像，转换的对像需要做对应的注解
* @return java.lang.String
* @Author wangzhh
* @Date 2019-06-13
**/
public static String convertToXml(Object obj) {
// 输出流
StringWriter writer = new StringWriter();
try {
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);
//marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.FALSE);
// 设置编码集
marshaller.setProperty(Marshaller.JAXB_ENCODING, "utf-8");
// 将对象转换成输出流形式的xml
marshaller.marshal(obj, writer);
} catch (Exception e) {
e.printStackTrace();
}
return writer.toString();
}
/**
* Description xml字符串转换为bean对像
* @Author wangzhh
* @Date 2019-06-13
* @param clazz
* @param xmlStr
* @return java.lang.Object
**/
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
Unmarshaller unmarshaller = context.createUnmarshaller();
StringReader reader = new StringReader(xmlStr);
xmlObject = unmarshaller.unmarshal(reader);
} catch (Exception e) {
e.printStackTrace();
}
return xmlObject;
}
public static void main(String[] args) {
TestXmlBean t = new TestXmlBean();
t.setName("张三");
t.setAge("");
Map<String,Object> map = new HashMap<String, Object>();
map.put("map","mapValue");
t.setMsgMap(map);
List<TestListBean> listBean = new ArrayList<TestListBean>();
TestListBean t1 = new TestListBean();
t1.setAddress("一号地址");
TestListBean t2 = new TestListBean();
t2.setAddress("二号地址");
listBean.add(t1);
listBean.add(t2);
t.setListBean(listBean);
System.out.println(XmlUtils.convertToXml(t));
String xmlStr = XmlUtils.convertToXml(t);
xmlStr = "<?xml version=\"1.0\" encoding=\"utf-8\"?><test><name>张三</name><age></age><msgMap><entry><key>map</key><value>mapValue</value></entry></msgMap><listBean><address>一号地址</address></listBean><listBean><address>二号地址</address></listBean></test>\n";
TestXmlBean bean = (TestXmlBean) XmlUtils.convertXmlStrToObject(TestXmlBean.class,xmlStr);
System.out.println(bean.toString());
}
}
测试用的类，饱含集合
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
import java.io.Serializable;
import java.util.List;
import java.util.Map;
/**
* @desc: 工具类测试对像
* @author: wangzhh
* @date: 2019-06-13
*/
@XmlAccessorType(XmlAccessType.FIELD)
// 根节点
@XmlRootElement(name = "test")
// 需要转换的属性,顺序
@XmlType(propOrder = {"name","age","msgMap","listBean"})
public class TestXmlBean implements Serializable {
private static final long serialVersionUID = -6854694430588003755L;
private String name;
private String age;
private Map<String,Object> msgMap;
private List<TestListBean> listBean;
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 Map<String, Object> getMsgMap() {
return msgMap;
}
public void setMsgMap(Map<String, Object> msgMap) {
this.msgMap = msgMap;
}
public List<TestListBean> getListBean() {
return listBean;
}
public void setListBean(List<TestListBean> listBean) {
this.listBean = listBean;
}
@Override
public String toString() {
return "TestXmlBean{" +
"name='" + name + '\'' +
", age='" + age + '\'' +
", msgMap=" + msgMap +
", listBean=" + listBean +
'}';
}
}
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
/**
* @desc:
* @author: wangzhh
* @date: 2019-06-13
*/
@XmlAccessorType(XmlAccessType.FIELD)
// 根节点
@XmlRootElement(name = "listBean")
// 需要转换的属性
@XmlType(propOrder = {"address"})
public class TestListBean {
private String address;
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public String toString() {
return "TestListBean{" +
"address='" + address + '\'' +
'}';
}
}
测试结果，控制台成功输出
Connected to the target VM, address: '127.0.0.1:49443', transport: 'socket'
<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<test>
<name>张三</name>
<age></age>
<msgMap>
<entry>
<key>map</key>
<value xsi:type="xs:string" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">mapValue</value>
</entry>
</msgMap>
<listBean>
<address>一号地址</address>
</listBean>
<listBean>
<address>二号地址</address>
</listBean>
</test>
TestXmlBean{name='张三', age='', msgMap={map=[value: null]}, listBean=[TestListBean{address='一号地址'}, TestListBean{address='二号地址'}]}
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