org.treeleafj.xmax.bean.FastBeanUtils Maven / Gradle / Ivy
package org.treeleafj.xmax.bean;
import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.beanutils.ConvertUtils;
import java.lang.reflect.Field;
import java.util.Map;
/**
* 提供快速操作javabean的方法
* 在apache beanutils上进行了扩展,对一些beanutils上存在的bug进行修复,比如beanutils.populate在大并发下内存泄漏的问题
*
* @author leaf
* @date 2014-3-20 下午8:59:54
*/
public class FastBeanUtils extends BeanUtils {
/**
* 缓存bean信息*
*/
private static FastBeanCache fastBeanCache = new FastBeanCache();
protected static FastBeanCache getFastBeanCache() {
return fastBeanCache;
}
/**
* 将Map的值装入指定的对象中,对象由 classz 类型决定
*
* @param classz 对象类型
* @param properties map值
* @return 返回装入后生成的对象
* @throws InstantiationException
* @throws IllegalAccessException
* @throws java.lang.reflect.InvocationTargetException
* @throws IllegalArgumentException
*/
public static T fastPopulate(Class classz, Map properties) {
try {
Object obj = classz.newInstance();
fastPopulate(obj, properties);
return (T) obj;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* 将Map的值装入指定的对象中
*
* @param obj 对象
* @param properties map值
* @throws java.lang.reflect.InvocationTargetException
* @throws IllegalAccessException
* @throws IllegalArgumentException
*/
public static void fastPopulate(Object obj, Map properties) {
Class classz = obj.getClass();
Map map = getFastBeanCache().getPropertiesEntryMap(classz);
if (map.size() > 0) {
try {
for (Map.Entry entry : properties.entrySet()) {
PropertiesEntry pe = map.get(entry.getKey());
if (pe != null) {
if (pe.getSet() != null) {
if (entry.getValue() != null) {
Object v = ConvertUtils.convert(entry.getValue(), pe.getType());
pe.getSet().invoke(obj, v);
} else {
entry.setValue(null);
}
}
}
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
/**
* 对Field进行设置,如果入参value的类型跟Field的类型不匹配,会尝试进行转换
*
* @param field
* @param obj
* @param v
*/
public static void setFieldValue(Field field, Object obj, Object v) {
field.setAccessible(true);
try {
Object value = ConvertUtils.convert(v, field.getType());
field.set(obj, value);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
}
/**
* 获取Field的值
*
* @param field
* @param obj
* @return
*/
public static Object getFieldValue(Field field, Object obj) {
field.setAccessible(true);
try {
return field.get(obj);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
}
}