请教:如何根据字符串中的内容创建对象

Question

public class CreateObj {public Object createObj(){String objName = "Person";Map fieldMap = new HashMap();fieldMap.put("name", "java.lang.String");fieldMap.put("age", "int");return null;}}上面这个类中的createObj方法能根据 objName和filedMap中的值创建一个和public class Person {private String name;private int age;}Person person1 = new Person();相同的对象?

Answer 1

不是Class.forName() 吗？

Answer 2

通过反射很容易的吧，

Answer 3

反射或者自己写注解

Answer 4

class Persion{
String name;
int age;
@XmlAttribute
public String getName() {return name};
public void setName(...){...}

@XmlAttribute
public String getAge(){return age};
public void setAge(...){...};
}

String xml = "<?xml version=\"1.0\">";

ByteArrayInputStream inStream = new ByteArrayInputStream(xml.getBytes());
JAXBContext jc = JAXBContext.newInstance(Persion.class);
StreamSource xml = new StreamSource(inputStream);
Unmarshaller unmarshaller = jc.createUnmarshaller();
JAXBElement je1 = unmarshaller.unmarshal(xml, pclass);

Persion persion = je1.getValue();

通过jaxb解析xml字符串生成对象