將Object物件轉換成Map 屬性名和值的形式

lonecloud發表於2017-03-12
Object物件

將Java物件轉換成Map的鍵值對形式

程式碼:

  1 package cn.lonelcoud.util;
  2 
  3 import com.sun.deploy.util.StringUtils;
  4 
  5 import java.lang.reflect.Field;
  6 import java.text.SimpleDateFormat;
  7 import java.util.*;
  8 
  9 /**
 10  * Created by lonecloud on 17/3/12.
 11  * 用於對Object進行解析並且轉換成Map鍵值對的形式
 12  *
 13  * @author lonecloud
 14  * @version 1.0
 15  */
 16 public class ObjectUtils {
 17 
 18     private static final String JAVAP = "java.";
 19     private static final String JAVADATESTR = "java.util.Date";
 20 
 21     /**
 22      * 獲取利用反射獲取類裡面的值和名稱
 23      *
 24      * @param obj
 25      * @return
 26      * @throws IllegalAccessException
 27      */
 28     public static Map<String, Object> objectToMap(Object obj) throws IllegalAccessException {
 29         Map<String, Object> map = new HashMap<>();
 30         Class<?> clazz = obj.getClass();
 31         System.out.println(clazz);
 32         for (Field field : clazz.getDeclaredFields()) {
 33             field.setAccessible(true);
 34             String fieldName = field.getName();
 35             Object value = field.get(obj);
 36             map.put(fieldName, value);
 37         }
 38         return map;
 39     }
 40 
 41     /**
 42      * 利用遞迴呼叫將Object中的值全部進行獲取
 43      *
 44      * @param timeFormatStr 格式化時間字串預設<strong>2017-03-10 10:21</strong>
 45      * @param obj           物件
 46      * @param excludeFields 排除的屬性
 47      * @return
 48      * @throws IllegalAccessException
 49      */
 50     public static Map<String, String> objectToMapString(String timeFormatStr, Object obj, String... excludeFields) throws IllegalAccessException {
 51         Map<String, String> map = new HashMap<>();
 52 
 53         if (excludeFields.length!=0){
 54             List<String> list = Arrays.asList(excludeFields);
 55             objectTransfer(timeFormatStr, obj, map, list);
 56         }else{
 57             objectTransfer(timeFormatStr, obj, map,null);
 58         }
 59         return map;
 60     }
 61 
 62 
 63     /**
 64      * 遞迴呼叫函式
 65      *
 66      * @param obj           物件
 67      * @param map           map
 68      * @param excludeFields 對應引數
 69      * @return
 70      * @throws IllegalAccessException
 71      */
 72     private static Map<String, String> objectTransfer(String timeFormatStr, Object obj, Map<String, String> map, List<String> excludeFields) throws IllegalAccessException {
 73         boolean isExclude=false;
 74         //預設字串
 75         String formatStr = "YYYY-MM-dd HH:mm:ss";
 76         //設定格式化字串
 77         if (timeFormatStr != null && !timeFormatStr.isEmpty()) {
 78             formatStr = timeFormatStr;
 79         }
 80         if (excludeFields!=null){
 81             isExclude=true;
 82         }
 83         Class<?> clazz = obj.getClass();
 84         //獲取值
 85         for (Field field : clazz.getDeclaredFields()) {
 86             String fieldName = clazz.getSimpleName() + "." + field.getName();
 87             //判斷是不是需要跳過某個屬性
 88             if (isExclude&&excludeFields.contains(fieldName)){
 89                 continue;
 90             }
 91             //設定屬性可以被訪問
 92             field.setAccessible(true);
 93             Object value = field.get(obj);
 94             Class<?> valueClass = value.getClass();
 95             if (valueClass.isPrimitive()) {
 96                 map.put(fieldName, value.toString());
 97 
 98             } else if (valueClass.getName().contains(JAVAP)) {//判斷是不是基本型別
 99                 if (valueClass.getName().equals(JAVADATESTR)) {
100                     //格式化Date型別
101                     SimpleDateFormat sdf = new SimpleDateFormat(formatStr);
102                     Date date = (Date) value;
103                     String dataStr = sdf.format(date);
104                     map.put(fieldName, dataStr);
105                 } else {
106                     map.put(fieldName, value.toString());
107                 }
108             } else {
109                 objectTransfer(timeFormatStr, value, map,excludeFields);
110             }
111         }
112         return map;
113     }
114 
115 }

該程式碼共享於github中 github地址

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