Java利用反射获取object的属性和值代码示例

import java.lang.reflect.Field;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;public class ReflexObjectUtil {public static Map<String, Object> getKeyAndValue(Object obj) {Map<String, Object> map = new HashMap<String, Object>();// 得到类对象Class userCla = (Class) obj.getClass();Field[] fs = userCla.getDeclaredFields();for (int i = 0; i < fs.length; i++) {Field f = fs[i];f.setAccessible(true);// 设置些属性是可以访问的Object val = new Object();try {val = f.get(obj);// 得到此属性的值map.put(f.getName(), val);// 设置键值}catch (IllegalArgumentException e) {e.printStackTrace();}catch (IllegalAccessException e) {e.printStackTrace();}}System.out.println("单个对象的所有键值==反射==" + map.toString());return map;}public static Object getValueByKey(Object obj, String key) {// 得到类对象Class userCla = (Class) obj.getClass();Field[] fs = userCla.getDeclaredFields();for (int i = 0; i < fs.length; i++) {Field f = fs[i];f.setAccessible(true);// 设置些属性是可以访问的try {if (f.getName().endsWith(key)) {System.out.println("单个对象的某个键的值==反射==" + f.get(obj));return f.get(obj);}}catch (IllegalArgumentException e) {e.printStackTrace();}catch (IllegalAccessException e) {e.printStackTrace();}}// 没有查到时返回空字符串return "";}public static List<Map<String, Object>> getKeysAndValues(List<Object> object) {List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();for (Object obj : object) {Class userCla;// 得到类对象userCla = (Class) obj.getClass();Field[] fs = userCla.getDeclaredFields();Map<String, Object> listChild = new HashMap<String, Object>();for (int i = 0; i < fs.length; i++) {Field f = fs[i];f.setAccessible(true);// 设置些属性是可以访问的Object val = new Object();try {val = f.get(obj);// 得到此属性的值listChild.put(f.getName(), val);// 设置键值}catch (IllegalArgumentException e) {e.printStackTrace();}catch (IllegalAccessException e) {e.printStackTrace();}}list.add(listChild);// 将map加入到list集合中}System.out.println("多个（列表）对象的所有键值====" + list.toString());return list;}public static List<Object> getValuesByKey(List<Object> object, String key) {List<Object> list = new ArrayList<Object>();for (Object obj : object) {// 得到类对象Class userCla = (Class) obj.getClass();Field[] fs = userCla.getDeclaredFields();for (int i = 0; i < fs.length; i++) {Field f = fs[i];f.setAccessible(true);// 设置些属性是可以访问的try {if (f.getName().endsWith(key)) {list.add(f.get(obj));}}catch (IllegalArgumentException e) {e.printStackTrace();}catch (IllegalAccessException e) {e.printStackTrace();}}}System.out.println("多个（列表）对象的某个键的值列表====" + list.toString());return list;}}