/**
* 获取某个字段的值
*
* @param entity
* @param fieldName
* @return
*/
public static Field getFieldByColumnName(Class<?> clazz, String columnName) {
Field field = null;
if (columnName != null) {
Field[] fields = clazz.getDeclaredFields();
if (fields != null && fields.length > 0) {
if (columnName.equals(ClassUtils.getPrimaryKeyColumn(clazz)))
field = ClassUtils.getPrimaryKeyField(clazz);
if (field == null) {
for (Field f : fields) {
Property property = f.getAnnotation(Property.class);
if (property != null && columnName.equals(property.column())) {
field = f;
break;
}
ManyToOne manyToOne = f.getAnnotation(ManyToOne.class);
if (manyToOne != null && manyToOne.column().trim().length() != 0) {
field = f;
break;
}
}
}
if (field == null) {
field = getFieldByName(clazz, columnName);
}
}
}
return field;
}
/**
* 获取某个熟悉对应的 表的列
*
* @param entity
* @param fieldName
* @return
*/
public static String getColumnByField(Field field) {
Property property = field.getAnnotation(Property.class);
if (property != null && property.column().trim().length() != 0) {
return property.column();
}
ManyToOne manyToOne = field.getAnnotation(ManyToOne.class);
if (manyToOne != null && manyToOne.column().trim().length() != 0) {
return manyToOne.column();
}
OneToMany oneToMany = field.getAnnotation(OneToMany.class);
if (oneToMany != null
&& oneToMany.manyColumn() != null
&& oneToMany.manyColumn().trim().length() != 0) {
return oneToMany.manyColumn();
}
Id id = field.getAnnotation(Id.class);
if (id != null && id.column().trim().length() != 0) return id.column();
return field.getName();
}