package czc.superzig.modular.utils;

 import java.lang.reflect.Field;

 import java.util.HashMap;

 import java.util.Map;

 import java.util.regex.Matcher;

 import java.util.regex.Pattern;

 /** 对象转Map工具类

  * <b>

  * </b><br><br><i>Description</i> :

  * <br><br>Date: 2019/6/18 ${time}    <br>Author : dxl

  */

 public class ObjToMap {

     private static Pattern linePattern = Pattern.compile("_(\\w)");

     private static Pattern humpPattern = Pattern.compile("[A-Z]");

     /**

      * <b>对象转map

      * @date 2019年7月1日 下午2:53:33    <br><i>author</i> : dxl

      */

     public static Map<String, Object> modelToMap(Object obj) {

         Map<String, Object> map = new HashMap<String, Object>();

         // 获取f对象对应类中的所有属性域

         Field[] fields = obj.getClass().getDeclaredFields();

         for (int i = 0, len = fields.length; i < len; i++) {

             String varName = fields[i].getName();

             if("serialVersionUID".equals(varName)){

                 continue;

             }

             //将key置为小写，默认为对象的属性

              varName = humpToLine(varName).toString();

             try {

                 // 获取原来的访问控制权限

                 boolean accessFlag = fields[i].isAccessible();

                 // 修改访问控制权限

                 fields[i].setAccessible(true);

                 // 获取在对象f中属性fields[i]对应的对象中的变量

                 Object o = fields[i].get(obj);

                 if (o != null){

                     map.put(varName, o);}

                 // System.out.println("传入的对象中包含一个如下的变量：" + varName + " = " + o);

                 // 恢复访问控制权限

                 fields[i].setAccessible(accessFlag);

             } catch (IllegalArgumentException ex) {

                 ex.printStackTrace();

             } catch (IllegalAccessException ex) {

                 ex.printStackTrace();

             }

         }

         return map;

     }

     /** 下划线转驼峰 */

     public static String lineToHump(String str) {

         str = str.toLowerCase();

         Matcher matcher = linePattern.matcher(str);

         StringBuffer sb = new StringBuffer();

         while (matcher.find()) {

             matcher.appendReplacement(sb, matcher.group(1).toUpperCase());

         }

         matcher.appendTail(sb);

         return sb.toString();

     }

     /** 驼峰转下划线,效率比上面高 */

     public static String humpToLine(String str) {

         Matcher matcher = humpPattern.matcher(str);

         StringBuffer sb = new StringBuffer();

         while (matcher.find()) {

             matcher.appendReplacement(sb, "_" + matcher.group(0).toLowerCase());

         }

         matcher.appendTail(sb);

         return sb.toString();

     }

 }