Java将一个对象的属性值copy给另一个相同的对象
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2022-05-26 14:02:54
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import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
public class CopyUtils {
public static void Copy(Object source, Object dest) throws Exception {
// 获取属性
BeanInfo sourceBean = Introspector.getBeanInfo(source.getClass(),Object.class);
PropertyDescriptor[] sourceProperty = sourceBean.getPropertyDescriptors();
BeanInfo destBean = Introspector.getBeanInfo(dest.getClass(),Object.class);
PropertyDescriptor[] destProperty = destBean.getPropertyDescriptors();
try {
for (int i = 0; i < sourceProperty.length; i++) {
for (int j = 0; j < destProperty.length; j++) {
if (sourceProperty[i].getName().equals(destProperty[j].getName()) && sourceProperty[i].getPropertyType() == destProperty[j].getPropertyType()) {
// 调用source的getter方法和dest的setter方法
destProperty[j].getWriteMethod().invoke(dest,sourceProperty[i].getReadMethod().invoke(source));
break;
}
}
}
} catch (Exception e) {
throw new Exception("属性复制失败:" + e.getMessage());
}
}
public static void main(String[] args) throws Exception{
Device device = new Device();
device.setDevId("99999");
Device devices = new Device();
CopyUtils.Copy(device,devices);
System.out.println(devices.getDevId());
}
}
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