import java.beans.PropertyDescriptor;

import java.lang.reflect.Field;

import java.lang.reflect.Method;

public class BeanChangeUtil<T> {

    public static <T> void main(String[] args) {

        User u1 = new User("1", true, "a");

        User u2 = new User("2", false, "b");

        BeanChangeUtil<T> t = new BeanChangeUtil<>();

        String str = t.contrastObj(u1, u2);

        if (str.equals("")) {

            System.out.println("未有改变");

        } else {

            System.out.println(str);

        }

    }

    @SuppressWarnings({ "unchecked", "rawtypes" })

    public String contrastObj(Object oldBean, Object newBean) {

        StringBuilder str = new StringBuilder();

        T pojo1 = (T) oldBean;

        T pojo2 = (T) newBean;

        try {

            // 通过反射获取类的类类型及字段属性

            Class clazz = pojo1.getClass();

            Field[] fields = clazz.getDeclaredFields();

            int i = 1;

            for (Field field : fields) {

            // 排除序列化属性

                if ("serialVersionUID".equals(field.getName())) {

                    continue;

                }

                PropertyDescriptor pd = new PropertyDescriptor(field.getName(), clazz);

                // 获取对应属性值

                Method getMethod = pd.getReadMethod();

                Object o1 = getMethod.invoke(pojo1);

                Object o2 = getMethod.invoke(pojo2);

                if (o1 == null || o2 == null) {

                    continue;

                }

                if (!o1.toString().equals(o2.toString())) {

                    str.append(i + "、字段名称:" + field.getName() + ",旧值:" + o1 + ",新值:" + o2 + ";");

                    i++;

                }

            }

        } catch (Exception e) {

            e.printStackTrace();

        }

        return str.toString();

    }

    static class User {

        private String about;

        private boolean lock;

        private String name;

        public User() {

        }

        public User(String about, boolean lock, String name) {

            super();

            this.about = about;

            this.lock = lock;

            this.name = name;

        }

        /*省略get、set方法*/

    }

}