com.ext_ext.mybatisext.helper.PropertyHelper Maven / Gradle / Ivy
package com.ext_ext.mybatisext.helper;
import java.io.Serializable;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import org.apache.ibatis.logging.Log;
import org.apache.ibatis.logging.LogFactory;
import org.apache.ibatis.reflection.MetaClass;
/**
* 保留list和bean的某些属性值
*
*
* @author 宋汝波
* @date 2015年3月13日
* @version 1.0.0
*/
@SuppressWarnings("rawtypes")
public class PropertyHelper {
private static Log logger = LogFactory.getLog(PropertyHelper.class);
@SuppressWarnings("unchecked")
public static T getProperty(Object obj, String propertyName) {
if (obj == null) {
return null;
}
MetaClass metaClass = MetaClass.forClass(obj.getClass());
try {
return (T) metaClass.getGetInvoker(propertyName).invoke(obj, new Object[] {});
} catch (Exception e) {
logger.error("", e);
}
return null;
}
public static Map getPropertiesValue(Object obj) {
MetaClass metaClass = MetaClass.forClass(obj.getClass());
Map result = new HashMap();
try {
String[] getters = metaClass.getGetterNames();
for (String getter : getters) {
Object value = metaClass.getGetInvoker(getter).invoke(obj, new Object[] {});
// 过滤掉null值
if (value != null) {
result.put(getter, value);
}
}
} catch (Exception e) {
logger.error("", e);
}
return result;
}
public static Map> getPropertiesType(Class cls) {
MetaClass metaClass = MetaClass.forClass(cls);
Map> result = new HashMap>();
String[] setters = metaClass.getSetterNames();
for (String setter : setters) {
Class value = metaClass.getSetterType(setter);
result.put(setter.toUpperCase(Locale.ENGLISH), value);
}
return result;
}
public static String[] getProperties(Class cls) {
MetaClass metaClass = MetaClass.forClass(cls);
String[] getters = metaClass.getGetterNames();
return getters;
}
public static void map2Object(Map map, Object newObj) {
MetaClass metaClass = MetaClass.forClass(newObj.getClass());
try {
String[] setter = metaClass.getSetterNames();
for (String set : setter) {
Object obj = map.get(set.toLowerCase());
metaClass.getSetInvoker(set).invoke(newObj, new Object[] { obj });
}
} catch (Exception e) {
logger.error("", e);
}
}
/**
* 保留属性值
*
*
* @param list
* @param property
*/
public static void reserveProperty(List list, String... property) {
if (list == null || list.size() == 0) {
return;
}
try {
Set setProperty = new HashSet(Arrays.asList(property));
MetaClass metaClass = MetaClass.forClass(list.get(0).getClass());
String[] setter = metaClass.getSetterNames();
for (String set : setter) {
// 不保留这些属性
if (!setProperty.contains(set)) {
for (Object obj : list) {
metaClass.getSetInvoker(set).invoke(obj, new Object[] { null });
}
}
}
} catch (Exception e) {
logger.error("", e);
}
}
/**
* 保留属性值
*
*
* @param object
* @param property
*/
public static void reserveProperty(Serializable object, String... property) {
if (object == null) {
return;
}
try {
Set setProperty = new HashSet(Arrays.asList(property));
MetaClass metaClass = MetaClass.forClass(object.getClass());
String[] setter = metaClass.getSetterNames();
for (String set : setter) {
// 不保留这些属性
if (!setProperty.contains(set)) {
metaClass.getSetInvoker(set).invoke(object, new Object[] { null });
}
}
} catch (Exception e) {
logger.error("", e);
}
}
/**
* 对象数据拷贝,可以全部赋值,包括null
*
*
* @param oldObj
* @param newObj
* @param isAll
*/
public static void copyProperty(Object oldObj, Object newObj, boolean isAll) {
if (oldObj == null || newObj == null) {
throw new RuntimeException("对象不能为null");
}
try {
MetaClass oldClass = MetaClass.forClass(oldObj.getClass());
MetaClass newClass = MetaClass.forClass(newObj.getClass());
String[] getter = oldClass.getGetterNames();
String[] setter = newClass.getSetterNames();
Set getProperty = new HashSet(Arrays.asList(getter));
for (String set : setter) {
if (getProperty.contains(set)) {
Object result = oldClass.getGetInvoker(set).invoke(oldObj, null);
if (isAll) {
newClass.getSetInvoker(set).invoke(newObj, new Object[] { result });
} else {
if (result != null) {
newClass.getSetInvoker(set).invoke(newObj, new Object[] { result });
}
}
}
}
} catch (Exception e) {
logger.error("", e);
}
}
/**
* 数据拷贝,默认只拷贝不是null的值,只要有相同属性就可以进行赋值操作
*
*
* @param oldObj
* @param newObj
*/
public static void copyProperty(Object oldObj, Object newObj) {
copyProperty(oldObj, newObj, false);
}
public static void main(String[] args) {
}
}