针对JFinal中Model对象复制属性的应用场景,针对有BaseModel的情况。分享一个工具类。有需要的来取。源码如下:
import java.lang.reflect.Method; import java.util.Arrays; import java.util.Collection; import java.util.List; public class BeanKit { /** * 利用反射实现Model对象之间属性复制 * @param from * @param to */ public static void copyProperties(Object from, Object to) throws Exception { copyPropertiesExclude(from, to, null); } /** * 复制对象属性 * @param from * @param to * @param excludsArray 排除属性列表 * @throws Exception */ @SuppressWarnings("rawtypes") public static void copyPropertiesExclude(Object from, Object to, String[] excludsArray) throws Exception { List<String> excludesList = null; if(excludsArray != null && excludsArray.length > 0) { excludesList = Arrays.asList(excludsArray); //构造列表对象 } // 针对有BaseModel的情况 Method[] fromMethods = from.getClass().getSuperclass().getDeclaredMethods(); Method[] toMethods = to.getClass().getSuperclass().getDeclaredMethods(); Method fromMethod = null, toMethod = null; String fromMethodName = null, toMethodName = null; for (int i = 0; i < fromMethods.length; i++) { fromMethod = fromMethods[i]; fromMethodName = fromMethod.getName(); if (!fromMethodName.contains("get")) continue; //排除列表检测 String str = fromMethodName.substring(3); if(excludesList != null && excludesList.contains(str.substring(0,1).toLowerCase() + str.substring(1))) { continue; } toMethodName = "set" + fromMethodName.substring(3); toMethod = findMethodByName(toMethods, toMethodName); if (toMethod == null) continue; Object value = fromMethod.invoke(from, new Object[0]); if(value == null) continue; //集合类判空处理 if(value instanceof Collection) { Collection newValue = (Collection)value; if(newValue.size() <= 0) continue; } toMethod.invoke(to, new Object[] {value}); } } /** * 对象属性值复制,仅复制指定名称的属性值 * @param from * @param to * @param includsArray * @throws Exception */ @SuppressWarnings("rawtypes") public static void copyPropertiesInclude(Object from, Object to, String[] includsArray) throws Exception { List<String> includesList = null; if(includsArray != null && includsArray.length > 0) { includesList = Arrays.asList(includsArray); //构造列表对象 } else { return; } Method[] fromMethods = from.getClass().getSuperclass().getDeclaredMethods(); Method[] toMethods = to.getClass().getSuperclass().getDeclaredMethods(); Method fromMethod = null, toMethod = null; String fromMethodName = null, toMethodName = null; for (int i = 0; i < fromMethods.length; i++) { fromMethod = fromMethods[i]; fromMethodName = fromMethod.getName(); if (!fromMethodName.contains("get")) continue; //排除列表检测 String str = fromMethodName.substring(3); if(!includesList.contains(str.substring(0,1).toLowerCase() + str.substring(1))) { continue; } toMethodName = "set" + fromMethodName.substring(3); toMethod = findMethodByName(toMethods, toMethodName); if (toMethod == null) continue; Object value = fromMethod.invoke(from, new Object[0]); if(value == null) continue; //集合类判空处理 if(value instanceof Collection) { Collection newValue = (Collection)value; if(newValue.size() <= 0) continue; } toMethod.invoke(to, new Object[] {value}); } } /** * 从方法数组中获取指定名称的方法 * * @param methods * @param name * @return */ public static Method findMethodByName(Method[] methods, String name) { for (int j = 0; j < methods.length; j++) { if (methods[j].getName().equals(name)) return methods[j]; } return null; } }
实际的例子:
Button button = Button.dao.findById(id); Resource resource = new Resource(); BeanKit.copyPropertiesExclude(button, resource, new String[]{"id", "iconCls", "createTime", "createUserId", "modifyTime", "modifyUserId"}); resource.setKind(2); resource.setPid(menuId); resource.setSortOrder(sequence++); resource.setCreateUserId(createUserId); resource.setCreateTime(new Date()); flag = resource.save();
其中:
sys_resource:
sys_button: