java 复制一个类中的属性给另一个具有相同属性的类

转自：DlamLiu 的《java 复制一个类中的属性给另一个具有相同属性的类》

原址：https://blog.csdn.net/qq_31565213/article/details/78018866

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
 
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
 
public class AttributeTransferUtil {
    
    private static final AttributeTransferUtil service = new AttributeTransferUtil();
    
    private final Logger LOG =LoggerFactory.getLogger(this.getClass());
    
    private AttributeTransferUtil(){}
    
    public static AttributeTransferUtil example(){
        return service;
    }
    
    public Object CloneAttribute(Object clone,Object beCloned){
        Field[] fieldClone = null;
        Field[] fieldBeCloned = null;
        Map<String,Field> map = new HashMap<String,Field>();
        try {
            Class<?> classClone = clone.getClass();
            Class<?> classBecloned = beCloned.getClass();
 
            fieldClone = classClone.getDeclaredFields();
            fieldBeCloned = classBecloned.getDeclaredFields();
            
            for(int t =0;t<fieldBeCloned.length;t++){
                map.put(fieldBeCloned[t].getName(), fieldBeCloned[t]);
            }
            
            for(int i=0;i<fieldClone.length;i++){
               String fieldCloneName = fieldClone[i].getName();
               Field fie = map.get(fieldCloneName);
               if(fie!=null){
                   Method method1 = classClone.getMethod(getMethodName(fieldCloneName));
                   Method method2 = classBecloned.getMethod(setMethodName(fieldCloneName),fie.getType());
                   method2.invoke(beCloned,method1.invoke(clone));
               }
            }
        } catch (Exception e) {
            LOG.error(e.getMessage(), e);
        }finally{
            fieldClone = null;
            fieldBeCloned = null;
            map.clear();
        }
        return beCloned;
    }
    
    private String getMethodName(String fieldName){
        String head = fieldName.substring(0, 1).toUpperCase();
        String tail = fieldName.substring(1);
        return "get"+head+tail;
    }
    
    private String setMethodName(String fieldName){
        String head = fieldName.substring(0, 1).toUpperCase();
        String tail = fieldName.substring(1);
        return "set"+head+tail;
    }
}