@XStreamAlias("kfpt_dept") //注意这个，后面变成了<kfpt__dept>  下划线。。。。

class Dept {

    private String deptName;

    private List<Staff> staffs;

    public String getDeptName() {

        return deptName;

    }

    public void setDeptName(String deptName) {

        this.deptName = deptName;

    }

    public List<Staff> getStaffs() {

        return staffs;

    }

    public void setStaffs(List<Staff> staffs) {

        this.staffs = staffs;

    }

    @Override

    public String toString() {

        return ToStringBuilder.reflectionToString(this, ToStringStyle.MULTI_LINE_STYLE);

    }

}

@XStreamAlias("kfpt_staffs")

class Staff {

    private String name;

    private int age;

    public Staff() {

        super();

    }

    public Staff(String name, int age) {

        super();

        this.name = name;

        this.age = age;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public int getAge() {

        return age;

    }

    public void setAge(int age) {

        this.age = age;

    }

    @Override

    public String toString() {

        return ToStringBuilder.reflectionToString(this, ToStringStyle.MULTI_LINE_STYLE);

    }

}

public class XstreamUtil {

    /**

     * 将bean转换为xml

     * @param obj 转换的bean

     * @return bean转换为xml

     */

    public static String objectToXml(Object obj) {

      //  XStream xStream = new XStream();
 XStream xStream = new XStream(new XppDriver(new XmlFriendlyNameCoder("_-", "_")));//解决下划线问题

        //xstream使用注解转换

       xStream.processAnnotations(obj.getClass());

        return xStream.toXML(obj);

    }

    /**

     * 将xml转换为bean

     * @param <T> 泛型

     * @param xml 要转换为bean的xml

     * @param cls bean对应的Class

     * @return xml转换为bean

     */

    public static <T> T xmlToObject(String xml, Class<T> cls){

        XStream xstream = new XStream(new DomDriver());

        //xstream使用注解转换

        xstream.processAnnotations(cls);

        return (T) xstream.fromXML(xml);

    }

}

public static void main(String[] args) {

        //java bean 转 xml

        Dept d = new Dept();

        List<Staff> staffs = new ArrayList<>();

        Staff s1 = new Staff("wuyun", 20);

        Staff s2 = new Staff("lilei", 22);

        staffs.add(s1);

        staffs.add(s2);

        d.setDeptName("开放平台");

        d.setStaffs(staffs);

        System.out.println(objectToXml(d));
/*

 用这个方法 XStream xStream = new XStream(); 会有下划线问题

<kfpt__dept>
<deptName>开放平台</deptName>
<staffs>
<kfpt__staffs>
<name>wuyun</name>
<age>20</age>
</kfpt__staffs>
<kfpt__staffs>
<name>lilei</name>
<age>22</age>
</kfpt__staffs>
</staffs>
</kfpt__dept>

XStream xStream = new XStream(new XppDriver(new XmlFriendlyNameCoder("_-", "_")));//可以解决下划线问题

<kfpt_dept>
<deptName>开放平台</deptName>
<staffs>
<kfpt_staffs>
<name>wuyun</name>
<age>20</age>
</kfpt_staffs>
<kfpt_staffs>
<name>lilei</name>
<age>22</age>
</kfpt_staffs>
</staffs>
</kfpt_dept>

*/

        //xml 转 java bean

        // String xml = "<kfpt__dept><deptName>开放平台</deptName><staffs><kfpt__staffs><name>wuyun</name><age>20</age></kfpt__staffs><kfpt__staffs><name>lilei</name><age>22</age></kfpt__staffs></staffs></kfpt__dept>";

        //        XStream xstream = new XStream(new DomDriver());

        //        //xstream使用注解转换

        //        xstream.processAnnotations(Dept.class);

        //        System.out.println(((Dept) xstream.fromXML(xml)).toString());

        //        System.out.println(xmlToObject(xml, Dept.class).toString());
/*

com.cmcc.open.ss.vo.req.Dept@5660d2d2[
deptName=开放平台
staffs=[com.cmcc.open.ss.vo.req.Staff@6eb1054b[
name=wuyun
age=20
], com.cmcc.open.ss.vo.req.Staff@27d2b7b3[
name=lilei
age=22
]]
]

*/


    }