对象和Map转化gongju

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();
    }
}