java 反射比较两个实体类不同

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代码示例

import java.lang.reflect.Field;import java.util.HashMap;import java.util.Map;public class Compare {    public static <T> Map<String, String> compare(T obj1, T Obj2)            throws Exception {        Map<String, String> result = new HashMap<String, String>();        Field[] fs = obj1.getClass().getDeclaredFields();//获取所有属性        for (Field f : fs) {            f.setAccessible(true);//设置访问性，反射类的方法，设置为true就可以访问private修饰的东西，否则无法访问            Object v1 = f.get(obj1);            Object v2 = f.get(Obj2);            result.put(f.getName(), String.valueOf(equals(v1, v2)));        }        return result;    }    public static boolean equals(Object obj1, Object obj2) {        if (obj1 == obj2) {            return true;        }        if (obj1 == null || obj2 == null) {            return false;        }        return obj1.equals(obj2);    }    public static void main(String[] args) throws Exception {        User user1 = new User(1,"11","11");        User user2 = new User(2,"22","11");        Map<String, String> result = compare(user1,user2);        System.out.println(result);    }}

输出结果

User实体类

public class User {    private Integer id;    private String name;    private String age;   /**     * 省略Get和Set方法。。。。    */    public User(Integer id, String name, String age) {        this.id = id;        this.name = name;        this.age = age;    }

}

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