Java Map和Bean之前的转换

// Map --> Bean 2: 利用org.apache.commons.beanutils 工具类实现 Map --> Bean
public static void transMap2Bean2(Map<String, Object> map, Object obj) {
if (map == null || obj == null) {
return;
}
try {
BeanUtils.populate(obj, map);
} catch (Exception e) {
System.out.println("transMap2Bean2 Error " + e);
}
}

// Map --> Bean 1: 利用Introspector,PropertyDescriptor实现 Map --> Bean
public static void transMap2Bean(Map<String, Object> map, Object obj) {

try {
BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();

for (PropertyDescriptor property : propertyDescriptors) {
String key = property.getName();

if (map.containsKey(key)) {
Object value = map.get(key);
// 得到property对应的setter方法
Method setter = property.getWriteMethod();
setter.invoke(obj, value);
}

}

} catch (Exception e) {
System.out.println("transMap2Bean Error " + e);
}

return;

}

// Bean --> Map 1: 利用Introspector和PropertyDescriptor 将Bean --> Map
public static Map<String, Object> transBean2Map(Object obj) {

if(obj == null){
return null;
}
Map<String, Object> map = new HashMap<String, Object>();
try {
BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
for (PropertyDescriptor property : propertyDescriptors) {
String key = property.getName();

// 过滤class属性
if (!key.equals("class")) {
// 得到property对应的getter方法
Method getter = property.getReadMethod();
Object value = getter.invoke(obj);

map.put(key, value);
}

}
} catch (Exception e) {
System.out.println("transBean2Map Error " + e);
}

return map;

}