将Java对象转换成Map的键值对形式
代码:
package cn.lonelcoud.util; import com.sun.deploy.util.StringUtils; import java.lang.reflect.Field;
import java.text.SimpleDateFormat;
import java.util.*; /**
* Created by lonecloud on 17/3/12.
* 用于对Object进行解析并且转换成Map键值对的形式
*
* @author lonecloud
* @version 1.0
*/
public class ObjectUtils { private static final String JAVAP = "java.";
private static final String JAVADATESTR = "java.util.Date"; /**
* 获取利用反射获取类里面的值和名称
*
* @param obj
* @return
* @throws IllegalAccessException
*/
public static Map<String, Object> objectToMap(Object obj) throws IllegalAccessException {
Map<String, Object> map = new HashMap<>();
Class<?> clazz = obj.getClass();
System.out.println(clazz);
for (Field field : clazz.getDeclaredFields()) {
field.setAccessible(true);
String fieldName = field.getName();
Object value = field.get(obj);
map.put(fieldName, value);
}
return map;
} /**
* 利用递归调用将Object中的值全部进行获取
*
* @param timeFormatStr 格式化时间字符串默认<strong>2017-03-10 10:21</strong>
* @param obj 对象
* @param excludeFields 排除的属性
* @return
* @throws IllegalAccessException
*/
public static Map<String, String> objectToMapString(String timeFormatStr, Object obj, String... excludeFields) throws IllegalAccessException {
Map<String, String> map = new HashMap<>(); if (excludeFields.length!=0){
List<String> list = Arrays.asList(excludeFields);
objectTransfer(timeFormatStr, obj, map, list);
}else{
objectTransfer(timeFormatStr, obj, map,null);
}
return map;
} /**
* 递归调用函数
*
* @param obj 对象
* @param map map
* @param excludeFields 对应参数
* @return
* @throws IllegalAccessException
*/
private static Map<String, String> objectTransfer(String timeFormatStr, Object obj, Map<String, String> map, List<String> excludeFields) throws IllegalAccessException {
boolean isExclude=false;
//默认字符串
String formatStr = "YYYY-MM-dd HH:mm:ss";
//设置格式化字符串
if (timeFormatStr != null && !timeFormatStr.isEmpty()) {
formatStr = timeFormatStr;
}
if (excludeFields!=null){
isExclude=true;
}
Class<?> clazz = obj.getClass();
//获取值
for (Field field : clazz.getDeclaredFields()) {
String fieldName = clazz.getSimpleName() + "." + field.getName();
//判断是不是需要跳过某个属性
if (isExclude&&excludeFields.contains(fieldName)){
continue;
}
//设置属性可以被访问
field.setAccessible(true);
Object value = field.get(obj);
Class<?> valueClass = value.getClass();
if (valueClass.isPrimitive()) {
map.put(fieldName, value.toString()); } else if (valueClass.getName().contains(JAVAP)) {//判断是不是基本类型
if (valueClass.getName().equals(JAVADATESTR)) {
//格式化Date类型
SimpleDateFormat sdf = new SimpleDateFormat(formatStr);
Date date = (Date) value;
String dataStr = sdf.format(date);
map.put(fieldName, dataStr);
} else {
map.put(fieldName, value.toString());
}
} else {
objectTransfer(timeFormatStr, value, map,excludeFields);
}
}
return map;
} }
该代码共享于github中 github地址