通過反射將一個對象的值賦給另一個對象中對應的屬性 不需要用set、get

 

    /**
     * @method      test
     * @author      BinCain
     * @return      void
     * @date        2017/11/5 0005 2:19
     * @Description:  將srcObj對象字段的值拷貝到destObj字段（前提：兩個對象中的字段名相同時）
     *                其實就是通過反射將值先存在map中，在遍歷set進目標對象
     */
    public static  void  copyFieldToBean(Object srcObj,Object destObj){
        Map<String, Object> srcMap = new HashMap<String, Object>();
        Field[] srcFields = srcObj.getClass().getDeclaredFields();
        for (Field srcField : srcFields) {
            try {
                srcField.setAccessible(true);
                srcMap.put(srcField.getName(), srcField.get(srcObj)); //獲取屬性值
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        Field[] destFields = destObj.getClass().getDeclaredFields();
        for (Field destField : destFields) {
            destField.setAccessible(true);
            if (srcMap.get(destField.getName()) == null) {
                continue;
            }
            try {
                destField.set(destObj, srcMap.get(destField.getName())); //給屬性賦值
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

 

 

/**
 * @author BinCain
 * @version V1.0
 * @Description: 第一個測試實體類：作爲資源實體類
 * @date 2017/11/5 0005 2:08
 */
public class FirstPerson {

    private String name;
    private int age;

    //GETTER && SETTER

 

 

/**
 * @author BinCain
 * @version V1.0
 * @Description: 第二個測試實體類：作爲目標實體類

 * @date 2017/11/5 0005 2:08
 */
public class SecondPerson {

    private String name;
    private int age;
    
    //GETTER && SETTER

public static void main(String[] args) {

        FirstPerson firstPerson = new FirstPerson();
        SecondPerson secondPerson = new SecondPerson();

        firstPerson.setAge(18);
        firstPerson.setName("LiLi");

        copyFieldToBean(firstPerson,secondPerson);
        Field[] fds = secondPerson.getClass().getDeclaredFields();
        for (Field fd : fds) {
            try {
                fd.setAccessible(true);
                System.out.println(fd.getName() + "=" + fd.get(secondPerson));
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

！

測試記結果如下：（符合預想）
name=LiLi
age=18

Process finished with exit code 0