Map和Bean灵活转换工具类

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package com.td.masterdata.util;

import java.util.Iterator;
import java.util.Map;

import org.apache.commons.beanutils.PropertyUtils;

/**
 * 扩展org.apache.commons.beanutils.BeanUtils

 * 
 * @author Wesley

 * 
 */
public class BeanUtils extends org.apache.commons.beanutils.BeanUtils {
	/**
	 * 将源对象中的值覆盖到目标对象中，仅覆盖源对象中不为NULL值的属性
	 * 
	 * @param dest
	 *            目标对象，标准的JavaBean
	 * @param orig
	 *            源对象，可为Map、标准的JavaBean
	 * @throws BusinessException
	 */
	@SuppressWarnings("rawtypes")
	public static void applyIf(Object dest, Object orig) throws Exception {
		try {
			if (orig instanceof Map) {
				Iterator names = ((Map) orig).keySet().iterator();
				while (names.hasNext()) {
					String name = (String) names.next();
					if (PropertyUtils.isWriteable(dest, name)) {
						Object value = ((Map) orig).get(name);
						if (value != null) {
							PropertyUtils.setSimpleProperty(dest, name, value);
						}
					}
				}
			} else {
				java.lang.reflect.Field[] fields = orig.getClass().getDeclaredFields();
				for (int i = 0; i < fields.length; i++) {
					String name = fields[i].getName();
					if (PropertyUtils.isReadable(orig, name) && PropertyUtils.isWriteable(dest, name)) {
						Object value = PropertyUtils.getSimpleProperty(orig, name);
						if (value != null) {
							PropertyUtils.setSimpleProperty(dest, name, value);
						}
					}
				}
			}
		} catch (Exception e) {
			throw new Exception("将源对象中的值覆盖到目标对象中，仅覆盖源对象中不为NULL值的属性", e);
		}
	}

	/**
	 * 将源对象中的值覆盖到目标对象中，仅覆盖源对象中不为NULL值的属性
	 * 
	 * @param orig
	 *            源对象，标准的JavaBean
	 * @param dest
	 *            排除检查的属性，Map
	 * 
	 * @throws BusinessException
	 */
	@SuppressWarnings("rawtypes")
	public static boolean checkObjProperty(Object orig, Map dest) throws Exception {
		try {
			java.lang.reflect.Field[] fields = orig.getClass().getDeclaredFields();
			for (int i = 0; i < fields.length; i++) {
				String name = fields[i].getName();
				if (!dest.containsKey(name)) {
					if (PropertyUtils.isReadable(orig, name)) {
						Object value = PropertyUtils.getSimpleProperty(orig, name);
						if (value == null) {
							return true;
						}
					}
				}
			}
			return false;
		} catch (Exception e) {
			throw new Exception("将源对象中的值覆盖到目标对象中，仅覆盖源对象中不为NULL值的属性", e);
		}
	}
}

package com.td.masterdata.util;

import java.util.Locale;

/**
 * javaBean的基本构成字符串转换方法
 * 
 * @author Wesley
 * 
 */
public class JavaBeanUtil {

	private static final char SEPARATOR = '_';

	/**
	 * 将属性样式字符串转成驼峰样式字符串

	 * (例:branchNo -> branch_no)

	 * 
	 * @param inputString
	 * @return
	 */
	public static String toUnderlineString(String inputString) {
		if (inputString == null)
			return null;
		StringBuilder sb = new StringBuilder();
		boolean upperCase = false;
		for (int i = 0; i < inputString.length(); i++) {
			char c = inputString.charAt(i);

			boolean nextUpperCase = true;

			if (i < (inputString.length() - 1)) {
				nextUpperCase = Character.isUpperCase(inputString.charAt(i + 1));
			}

			if ((i >= 0) && Character.isUpperCase(c)) {
				if (!upperCase || !nextUpperCase) {
					if (i > 0)
						sb.append(SEPARATOR);
				}
				upperCase = true;
			} else {
				upperCase = false;
			}

			sb.append(Character.toLowerCase(c));
		}

		return sb.toString();
	}

	/**
	 * 将驼峰字段转成属性字符串

	 * (例:branch_no -> branchNo )

	 * 
	 * @param inputString
	 *            输入字符串
	 * @return
	 */
	public static String toCamelCaseString(String inputString) {
		return toCamelCaseString(inputString, false);
	}

	/**
	 * 将驼峰字段转成属性字符串

	 * (例:branch_no -> branchNo )

	 * 
	 * @param inputString
	 *            输入字符串
	 * @param firstCharacterUppercase
	 *            是否首字母大写
	 * @return
	 */
	public static String toCamelCaseString(String inputString, boolean firstCharacterUppercase) {
		if (inputString == null)
			return null;
		StringBuilder sb = new StringBuilder();
		boolean nextUpperCase = false;
		for (int i = 0; i < inputString.length(); i++) {
			char c = inputString.charAt(i);

			switch (c) {
			case '_':
			case '-':
			case '@':
			case '$':
			case '#':
			case ' ':
			case '/':
			case '&':
				if (sb.length() > 0) {
					nextUpperCase = true;
				}
				break;

			default:
				if (nextUpperCase) {
					sb.append(Character.toUpperCase(c));
					nextUpperCase = false;
				} else {
					sb.append(Character.toLowerCase(c));
				}
				break;
			}
		}

		if (firstCharacterUppercase) {
			sb.setCharAt(0, Character.toUpperCase(sb.charAt(0)));
		}

		return sb.toString();
	}

	/**
	 * 得到标准字段名称
	 * 
	 * @param inputString
	 *            输入字符串
	 * @return
	 */
	public static String getValidPropertyName(String inputString) {
		String answer;
		if (inputString == null) {
			answer = null;
		} else if (inputString.length() < 2) {
			answer = inputString.toLowerCase(Locale.US);
		} else {
			if (Character.isUpperCase(inputString.charAt(0)) && !Character.isUpperCase(inputString.charAt(1))) {
				answer = inputString.substring(0, 1).toLowerCase(Locale.US) + inputString.substring(1);
			} else {
				answer = inputString;
			}
		}
		return answer;
	}

	/**
	 * 将属性转换成标准set方法名字符串

	 * 
	 * @param property
	 * @return
	 */
	public static String getSetterMethodName(String property) {
		StringBuilder sb = new StringBuilder();

		sb.append(property);
		if (Character.isLowerCase(sb.charAt(0))) {
			if (sb.length() == 1 || !Character.isUpperCase(sb.charAt(1))) {
				sb.setCharAt(0, Character.toUpperCase(sb.charAt(0)));
			}
		}
		sb.insert(0, "set");
		return sb.toString();
	}

	/**
	 * 将属性转换成标准get方法名字符串

	 * 
	 * @param property
	 * @return
	 */
	public static String getGetterMethodName(String property) {
		StringBuilder sb = new StringBuilder();

		sb.append(property);
		if (Character.isLowerCase(sb.charAt(0))) {
			if (sb.length() == 1 || !Character.isUpperCase(sb.charAt(1))) {
				sb.setCharAt(0, Character.toUpperCase(sb.charAt(0)));
			}
		}
		sb.insert(0, "get");
		return sb.toString();
	}

	public static void main(String[] args) {
		System.out.println(JavaBeanUtil.toUnderlineString("ISOCertifiedStaff"));
		System.out.println(JavaBeanUtil.getValidPropertyName("CertifiedStaff"));
		System.out.println(JavaBeanUtil.getSetterMethodName("userID"));
		System.out.println(JavaBeanUtil.getGetterMethodName("userID"));
		System.out.println(JavaBeanUtil.toCamelCaseString("iso_certified_staff", true));
		System.out.println(JavaBeanUtil.getValidPropertyName("certified_staff"));
		System.out.println(JavaBeanUtil.toCamelCaseString("site_Id"));
	}

}

package com.td.masterdata.util;

import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Map工具类

 * 
 * @author Wesley

 * 
 */
public class MapUtils extends org.apache.commons.collections.MapUtils {

	/**
	 * 将Map转换为Object
	 * 
	 * @param clazz
	 *            目标对象的类
	 * @param map
	 *            待转换Map
	 * @return
	 * @throws InstantiationException
	 * @throws IllegalAccessException
	 * @throws InvocationTargetException
	 */
	public static  T toObject(Class clazz, Map map) throws InstantiationException, IllegalAccessException, InvocationTargetException {
		T object = clazz.newInstance();
		return toObject(object, map);
	}

	/**
	 * 将Map转换为Object
	 * 
	 * @param clazz
	 *            目标对象的类
	 * @param map
	 *            待转换Map
	 * @param toCamelCase
	 *            是否去掉下划线
	 * @return
	 * @throws InstantiationException
	 * @throws IllegalAccessException
	 * @throws InvocationTargetException
	 */
	public static  T toObject(Class clazz, Map map, boolean toCamelCase) throws InstantiationException, IllegalAccessException, InvocationTargetException {
		T object = clazz.newInstance();
		return toObject(object, map, toCamelCase);
	}

	/**
	 * 将Map转换为Object
	 * 
	 * @param object
	 *            目标对象
	 * @param map
	 *            待转换Map
	 * @return
	 * @throws InstantiationException
	 * @throws IllegalAccessException
	 * @throws InvocationTargetException
	 */
	public static  T toObject(T object, Map map) throws InstantiationException, IllegalAccessException, InvocationTargetException {
		return toObject(object, map, false);
	}

	public static  T toObject(T object, Map map, boolean toCamelCase) throws InstantiationException, IllegalAccessException, InvocationTargetException {
		if (toCamelCase)
			map = toCamelCaseMap(map);
		BeanUtils.populate(object, map);
		return object;
	}

	/**
	 * 对象转Map
	 * 
	 * @param object
	 *            目标对象
	 * @return
	 * @throws IllegalAccessException
	 * @throws InvocationTargetException
	 * @throws NoSuchMethodException
	 */
	@SuppressWarnings("unchecked")
	public static Map toMap(Object object) throws IllegalAccessException, InvocationTargetException, NoSuchMethodException {
		return BeanUtils.describe(object);
	}

	/**
	 * 转换为Collection>
	 * 
	 * @param collection
	 *            待转换对象集合
	 * @return 转换后的Collection>
	 * @throws IllegalAccessException
	 * @throws InvocationTargetException
	 * @throws NoSuchMethodException
	 */
	public static  Collection> toMapList(Collection collection) throws IllegalAccessException, InvocationTargetException, NoSuchMethodException {
		List> retList = new ArrayList>();
		if (collection != null && !collection.isEmpty()) {
			for (Object object : collection) {
				Map map = toMap(object);
				retList.add(map);
			}
		}
		return retList;
	}

	/**
	 * 转换为Collection,同时为字段做驼峰转换>
	 * 
	 * @param collection
	 *            待转换对象集合
	 * @return 转换后的Collection>
	 * @throws IllegalAccessException
	 * @throws InvocationTargetException
	 * @throws NoSuchMethodException
	 */
	public static  Collection> toMapListForFlat(Collection collection) throws IllegalAccessException, InvocationTargetException, NoSuchMethodException {
		List> retList = new ArrayList>();
		if (collection != null && !collection.isEmpty()) {
			for (Object object : collection) {
				Map map = toMapForFlat(object);
				retList.add(map);
			}
		}
		return retList;
	}

	/**
	 * 转换成Map并提供字段命名驼峰转平行
	 * 
	 * @param clazz
	 *            目标对象所在类
	 * @param object
	 *            目标对象
	 * @param map
	 *            待转换Map
	 * @throws NoSuchMethodException
	 * @throws InvocationTargetException
	 * @throws IllegalAccessException
	 */
	public static Map toMapForFlat(Object object) throws IllegalAccessException, InvocationTargetException, NoSuchMethodException {
		Map map = toMap(object);
		return toUnderlineStringMap(map);
	}

	/**
	 * 将Map的Keys去下划线

	 * (例:branch_no -> branchNo )

	 * 
	 * @param map
	 *            待转换Map
	 * @return
	 */
	public static  Map toCamelCaseMap(Map map) {
		Map newMap = new HashMap();
		for (String key : map.keySet()) {
			safeAddToMap(newMap, JavaBeanUtil.toCamelCaseString(key), map.get(key));
		}
		return newMap;
	}

	/**
	 * 将Map的Keys转译成下划线格式的

	 * (例:branchNo -> branch_no)

	 * 
	 * @param map
	 *            待转换Map
	 * @return
	 */
	public static  Map toUnderlineStringMap(Map map) {
		Map newMap = new HashMap();
		for (String key : map.keySet()) {
			newMap.put(JavaBeanUtil.toUnderlineString(key), map.get(key));
		}
		return newMap;
	}

}

• util.zip (3.6 KB)
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• commons-collections-3.2.1.jar (561.9 KB)
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• commons-lang-2.5.jar (272.6 KB)
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• commons-beanutils-1.8.0.jar (225.9 KB)
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