使用反射赋值。
Class clazz = object.getClass();
Method method = clazz.getDeclaredMethod("setLastUpdateDate", Date.class);
method.invoke(object, new Date());
如:
import java.lang.reflect.Method; import java.util.Date; import javax.servlet.http.HttpSession; /** * 该类用来对系统中业务实体中的保留字段进行维护 * 提供公用的方法签名 * */ public class ObjectUtil { /** * 设置创建人的一些属性值,不需要更新创建日期 * @param object */ @SuppressWarnings("unchecked") public static void setUpdatedBy(Object object) { @SuppressWarnings("rawtypes") Class clazz = object.getClass(); HttpSession httpSession = GlobalSession.getHttpSession(); try { SysUser dbCheckUser = (SysUser) httpSession.getAttribute(SessionKeys.SESSION_SYS_USER); Long userId = dbCheckUser.getId(); Method setLastUpdateBy = clazz.getDeclaredMethod("setLastUpdateBy", Long.class); Method setLastUpdateDate = clazz.getDeclaredMethod("setLastUpdateDate", Date.class); setLastUpdateBy.invoke(object, userId); setLastUpdateDate.invoke(object, new Date()); } catch (Exception ex) { ex.printStackTrace(); } } /** * 方法名称:setCreatedBy * 功能描述: * 设置创建人的一些属性值 * @param object */ @SuppressWarnings("unchecked") public static void setCreatedBy(Object object) { // 获得类对象 @SuppressWarnings("rawtypes") Class clazz = object.getClass(); HttpSession httpSession = GlobalSession.getHttpSession(); try { SysUser dbCheckUser = (SysUser) httpSession.getAttribute(SessionKeys.SESSION_SYS_USER); Long userId = dbCheckUser.getId(); Method setCreatedBy = clazz.getDeclaredMethod("setCreatedBy", Long.class); Method setLastUpdateBy = clazz.getDeclaredMethod("setLastUpdateBy", Long.class); Method setCreatedDate = clazz.getDeclaredMethod("setCreatedDate", Date.class); Method setLastUpdateDate = clazz.getDeclaredMethod("setLastUpdateDate", Date.class); Method setEnabledFlag = clazz.getDeclaredMethod("setEnabledFlag", String.class); setCreatedBy.invoke(object, userId); setLastUpdateBy.invoke(object, userId); setCreatedDate.invoke(object, new Date()); setLastUpdateDate.invoke(object, new Date()); setEnabledFlag.invoke(object, Constants.ENABLED_FLAG_Y); } catch (Exception ex) { ex.printStackTrace(); } } }
或:
/** * * 设置target对象中名为fieldName的属性值为value * * @param target * @param fieldName * @param value * * @return target对象 * */ public static Object setValueToField(Object target, String fieldName, Object value){ Field[] fs = target.getClass().getDeclaredFields(); for(Field f : fs){ if(f.getName().equalsIgnoreCase(fieldName)){ try { f.setAccessible(true); f.set(target, value); } catch (Exception e) { logger.error("\u8bbe\u7f6e\u503c\u51fa\u9519\uff0c\u8bf7\u68c0\u67e5 [target : " + target.getClass() + "][field : " + f.getName() + "][value : " + value.getClass() + "]"); e.printStackTrace(); } break; } } return target; }
。。