如下所示：

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 { /** * 把实体bean对象转换成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(); // 获取对象对应类中的所有属性域 Field[] fields = bean.getClass().getDeclaredFields(); for (Field field : fields) { // 获取属性名 String varName = field.getName(); // 修改访问控制权限 boolean accessFlag = field.isAccessible(); if (!accessFlag) { field.setAccessible(true); } Object param = field.get(bean); if (param == null) { continue; } else if (param instanceof Integer) {//判断变量的类型 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); } // 恢复访问控制权限 field.setAccessible(accessFlag); } return dbObject; } /** * 把DBObject转换成bean对象 * @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; } }

以上就是小编为大家带来的java操作mongodb时,对象bean和DBObject相互转换的方法(推荐)全部内容了，希望大家多多支持查字典教程网~