反射学习
package cn.lxl.reflect;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
public class ReflectTest1 {
public Object copy(Object obj) throws Exception {
Class<?> classType = obj.getClass();
Constructor<?> testConstructor = classType
.getConstructor(new Class[] {});
Object testInstance = testConstructor.newInstance(new Object[] {});
Field[] fields = classType.getDeclaredFields();
for (Field field : fields) {
String name = field.getName();
String firstLetter = name.substring(0, 1).toUpperCase();
String getMethodName = "get" + firstLetter + name.substring(1);
String setMethodName = "set" + firstLetter + name.substring(1);
Method getMethod = classType.getMethod(getMethodName,
new Class[] {});
Method setMethod = classType.getMethod(setMethodName,
new Class[] { field.getType() });
Object value = getMethod.invoke(obj, new Object[] {});
setMethod.invoke(testInstance, new Object[] { value });
}
return testInstance;
}
public static void main(String[] args) throws Exception {
Customer customer = new Customer("tom", 26);
customer.setId(1L);
ReflectTest1 test = new ReflectTest1();
Customer customer2 = (Customer) test.copy(customer);
System.out.println(customer2.getId() + "," + customer2.getName() + ","
+ customer2.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 Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
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;
}
}
本文出自 “Jxiaolei” 博客
补充：软件开发 , Java ,
