如下所示：
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package com.iqbon.spider.util; import java.lang.reflect.Field; import java.lang.reflect.InvocationTargetException; import java.util.Date; import org.apache.commons.beanutils.BeanUtils; import com.mongodb.BasicDBObject; import com.mongodb.DBObject; public class BeanUtil { /** * 把實體bean對象轉(zhuǎn)換成DBObject * @param bean * @return * @throws IllegalArgumentException * @throws IllegalAccessException */ public static <T> DBObject bean2DBObject(T bean) throws IllegalArgumentException, IllegalAccessException { if (bean == null) { return null; } DBObject dbObject = new BasicDBObject(); // 獲取對象對應類中的所有屬性域 Field[] fields = bean.getClass().getDeclaredFields(); for (Field field : fields) { // 獲取屬性名 String varName = field.getName(); // 修改訪問控制權(quán)限 boolean accessFlag = field.isAccessible(); if (!accessFlag) { field.setAccessible(true); } Object param = field.get(bean); if (param == null) { continue; } else if (param instanceof Integer) {//判斷變量的類型 int value = ((Integer) param).intValue(); dbObject.put(varName, value); } else if (param instanceof String) { String value = (String) param; dbObject.put(varName, value); } else if (param instanceof Double) { double value = ((Double) param).doubleValue(); dbObject.put(varName, value); } else if (param instanceof Float) { float value = ((Float) param).floatValue(); dbObject.put(varName, value); } else if (param instanceof Long) { long value = ((Long) param).longValue(); dbObject.put(varName, value); } else if (param instanceof Boolean) { boolean value = ((Boolean) param).booleanValue(); dbObject.put(varName, value); } else if (param instanceof Date) { Date value = (Date) param; dbObject.put(varName, value); } // 恢復訪問控制權(quán)限 field.setAccessible(accessFlag); } return dbObject; } /** * 把DBObject轉(zhuǎn)換成bean對象 * @param dbObject * @param bean * @return * @throws IllegalAccessException * @throws InvocationTargetException * @throws NoSuchMethodException */ public static <T> T dbObject2Bean(DBObject dbObject, T bean) throws IllegalAccessException, InvocationTargetException, NoSuchMethodException { if (bean == null) { return null; } Field[] fields = bean.getClass().getDeclaredFields(); for (Field field : fields) { String varName = field.getName(); Object object = dbObject.get(varName); if (object != null) { BeanUtils.setProperty(bean, varName, object); } } return bean; } } |
以上就是小編為大家?guī)淼膉ava操作mongodb時,對象bean和DBObject相互轉(zhuǎn)換的方法(推薦)全部內(nèi)容了，希望大家多多支持服務器之家~
