db_mcyc/xzl-admin/src/main/java/com/xzl/web/utils/CommonUtils.java

package com.xzl.web.utils;

import org.apache.commons.lang3.StringUtils;

import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.*;

/**
 * @Description:
 * @Author: gl
 * @CreateDate: 2018/9/4 11:32
 * @UpdateUser:
 * @UpdateDate: 2018/9/4 11:32
 * @UpdateRemark:
 * @Version: 1.0
 */
public class CommonUtils {
    public static void Copy(Object source, Object dest) throws Exception {
        // 获取属性
        BeanInfo sourceBean = Introspector.getBeanInfo(source.getClass(), Object.class);
        PropertyDescriptor[] sourceProperty = sourceBean.getPropertyDescriptors();

        BeanInfo destBean = Introspector.getBeanInfo(dest.getClass(), Object.class);
        PropertyDescriptor[] destProperty = destBean.getPropertyDescriptors();

        try {
            for (int i = 0; i < sourceProperty.length; i++) {

                for (int j = 0; j < destProperty.length; j++) {

                    if (sourceProperty[i].getName().equals(destProperty[j].getName()) && sourceProperty[i].getPropertyType() == destProperty[j].getPropertyType()) {
                        // 调用source的getter方法和dest的setter方法
                        destProperty[j].getWriteMethod().invoke(dest, sourceProperty[i].getReadMethod().invoke(source));
                        break;
                    }
                }
            }
        } catch (Exception e) {
            throw new Exception("属性复制失败:" + e.getMessage());
        }
    }

    public static String frontCompWithZore(int sourceDate, int formatLength) {
        /*
         * 0 指前面补充零
         * formatLength 字符总长度为 formatLength
         * d 代表为正数。
         */
        String newString = String.format("%0" + formatLength + "d", sourceDate);
        return newString;
    }

    /*将一个 JavaBean 对象转化为一个  Map*/
    @SuppressWarnings({"rawtypes", "unchecked"})
    public static Map convertBean(Object bean)
            throws IntrospectionException, IllegalAccessException, InvocationTargetException {
        Class type = bean.getClass();
        Map returnMap = new HashMap();
        BeanInfo beanInfo = Introspector.getBeanInfo(type);

        PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
        for (int i = 0; i < propertyDescriptors.length; i++) {
            PropertyDescriptor descriptor = propertyDescriptors[i];
            String propertyName = descriptor.getName();
            if (!propertyName.equals("class")) {
                Method readMethod = descriptor.getReadMethod();
                Object result = readMethod.invoke(bean, new Object[0]);
                if (result != null) {
                    returnMap.put(propertyName, result);
                } else {
                    returnMap.put(propertyName, "");
                }
            }
        }
        return returnMap;
    }

    /*将一个 Map 对象转化为一个 JavaBean*/
    @SuppressWarnings("rawtypes")
    public static Object convertMap(Class type, Map map)
            throws IntrospectionException, IllegalAccessException,
            InstantiationException, InvocationTargetException {
        BeanInfo beanInfo = Introspector.getBeanInfo(type); // 获取类属性
        Object obj = type.newInstance(); // 创建 JavaBean 对象

        // 给 JavaBean 对象的属性赋值
        PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
        for (int i = 0; i < propertyDescriptors.length; i++) {
            PropertyDescriptor descriptor = propertyDescriptors[i];
            String propertyName = descriptor.getName();

            if (map.containsKey(propertyName)) {
                // 下面一句可以 try 起来，这样当一个属性赋值失败的时候就不会影响其他属性赋值。
                Object value = map.get(propertyName);

                Object[] args = new Object[1];
                args[0] = value;

                descriptor.getWriteMethod().invoke(obj, args);
            }
        }
        return obj;
    }

    //讲map中值为“”转为null
    public static Map<String, Object> emptyToNull(Map<String, Object> map) {
        Set<String> set = map.keySet();
        if (set != null && !set.isEmpty()) {
            for (String key : set) {
                if (map.get(key) == "") {
                    map.put(key, null);
                }
            }
        }
        return map;
    }


    //生成订单号
    public static String generatOrderNo(String preOrder, String orderNo) {
        if (StringUtils.isEmpty(orderNo)) {
            return preOrder + getCurrDate() + "0001";
        } else {
            int i = Integer.parseInt(orderNo);
            i++;
            String num = String.valueOf(i);
            return preOrder + getCurrDate() + numString(num);
        }
    }

    public static String numString(String str) {//递归生成后五位字符串
        if (str.length() == 4) {
            return str;
        } else {
            return numString("0" + str);
        }
    }

    public static String getCurrDate() {
        SimpleDateFormat sf = new SimpleDateFormat("yyMMdd");
        String date = sf.format(new Date());
        return date;
    }

    public static Date addDays(Date date, int amount) {
        Calendar now = Calendar.getInstance();
        now.setTime(date);
        now.set(Calendar.DATE, now.get(Calendar.DATE) + amount);
        return now.getTime();
    }

}