java反射机制测试

package reflect;

import java.lang.reflect.Field;
import java.lang.reflect.Method;

public class ReflectTester {

@SuppressWarnings("unchecked")
public Object copy(Object object) throws Exception {
//获得对象类型
Class classType = object.getClass();
System.out.println(
"" + classType.getName());

//通过默认构造方法创建一个新的对象
Object objectCopy = classType.getConstructor(new Class[] {})
.newInstance(new Object[] {});

//获得对象的所有属性
Field fields[] = classType.getDeclaredFields();

for (int i = 0; i < fields.length; i++) {
Field field = fields<i>;

String fieldName = field.getName();
String firstLetter = fieldName.substring(0, 1).toUpperCase();

//获得和属性对应的getXXX()方法的名字
String getMethodName =
"get" + firstLetter + fieldName.substring(1);
//获得和属性对应的setXXX()方法的名字
String setMethodName =
"set" + firstLetter + fieldName.substring(1);

//获得和属性对应的getXXX()方法
Method getMethod = classType.getMethod(getMethodName,
new Class[] {});
//获得和属性对应的setXXX()方法
Method setMethod = classType.getMethod(setMethodName,
new Class[] { field.getType() });

//调用原对象的getXXX()方法
Object value = getMethod.invoke(object, new Object[] {});
System.out.println(fieldName +
":" + value);
//调用拷贝对象的setXXX()方法
setMethod.invoke(objectCopy, new Object[] { value });

}

return objectCopy;

}

public static void main(String[] args) throws Exception {
Customer customer = new Customer(
"lunzi",26);
customer.setId(new Long(1));

Customer customerCopy =(Customer)new ReflectTester().copy(customer);
System.out.println(
"Copy information:"+customerCopy.getName()+" "+customerCopy.getAge());


}

}

class Customer {
private long id;
private String name;
private int age;

public Customer() {

}

public Customer(String name,int age) {
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;
}

public long getId() {
return id;
}

public void setId(long id) {
this.id = id;
}

}

lunzi   2007-10-13 02:15:30 评论:0   阅读:874   引用:0

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