使用xStream实现xml和object的相互转换
官方地址:http://x-stream.github.io/index.html
1.xStream的依赖
<!-- https://mvnrepository.com/artifact/com.thoughtworks.xstream/xstream -->
<dependency>
<groupId>com.thoughtworks.xstream</groupId>
<artifactId>xstream</artifactId>
<version>1.4.11.1</version>
</dependency>
2.object到xml的转换
例如有java类如下:
// 1.Person
public class Person
{
private String name;
private int age;
private boolean sex;
private Job job;
// getter、setter省略
}
// 2. Job
public class Job
{
private String jobName;
private int jobLife;
// getter、setter省略
}
新建java对象:
Job job = new Job();
job.setJobName("it");
job.setJobLife(4);
Person p = new Person();
p.setName("zs");
p.setAge(6);
p.setSex(true);
p.setJob(job);
使用xStream生成xml:
XStream xStream =new XStream();
String xml = xStream.toXML(p);
System.out.println(xml);
得到结果:
我们看到Person类转化为xml后标签为com.app.model.Person全类名,我们希望能够简化为简单的Person标签,这时候就使用到xStream的alias(别名)设置
使用别名:
(1) xStream的别名设置方法:
类别名:xStream.alias("Person", Person.class);// 别名,类
字段别名:xStream.aliasField("jobInfo", Person.class, "job");// 别名,类,要设置别名的字段
// 解释:给Person设置别名Person,给Person类中的job属性设置别名jobInfo
(2) 注解方式:
在Person类上加注解:@XStreamAlias("Person")
在job属性上加注解:@XStreamAlias("jobInfo")
读取类中的注解:xStream.processAnnotations(Person.class);
上述两种方式均可得到结果:
3.xml到object的转换
例如有xml文件Person.xml:
<?xml version="1.0" encoding="UTF-8"?>
<Person>
<name>zs</name>
<age>6</age>
<sex>true</sex>
<jobInfo>
<jobName>it</jobName>
<jobLife>4</jobLife>
</jobInfo>
</Person>
使用xStream读取xml:
XStream xStream = new XStream();
XStream.setupDefaultSecurity(xStream);// 设置安全权限
xStream.allowTypes(new Class[] {Person.class});// 设置可转换类型
xStream.processAnnotations(Person.class);
Person p = (Person)xStream.fromXML(new File("E:/Person.xml"));
得到Person对象:
关于工具类的封装,后续给出吧