Map与JavaBean实体类之间的相互转化

package com.newcapec.util.map;import java.beans.BeanInfo;import java.beans.IntrospectionException;import java.beans.Introspector;import java.beans.PropertyDescriptor;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;import java.util.HashMap;import java.util.Map;import org.apache.commons.beanutils.PropertyUtilsBean;import com.newcapec.cloudpay.dao.po.HostUserInfo;import com.newcapec.cloudpay.dao.po.WXUserInfo;/** * @Title: Java 中 Map与JavaBean实体类之间的相互转化 * @ClassName:MapBeanTransUtils.java * @Description: * * @Copyright 2016-2017  - Powered By 研发中心 * @author: FLY * @date:2016年12月23日 上午10:11:49 * @version V1.0 */public class MapBeanTransUtils {   /**    * 将一个 JavaBean 对象转化为一个 Map    *     * @param bean    *            要转化的JavaBean 对象    * @return 转化出来的 Map 对象    * @throws IntrospectionException    *             如果分析类属性失败    * @throws IllegalAccessException    *             如果实例化 JavaBean 失败    * @throws InvocationTargetException    *             如果调用属性的 setter 方法失败    */   @SuppressWarnings({ "rawtypes", "unchecked" })   public static Map bean2Map(Object bean)         throws IntrospectionException, IllegalAccessException, InvocationTargetException {      Class type = bean.getClass();      Map returnMap = new HashMap();      BeanInfo beanInfo = Introspector.getBeanInfo(type);      PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();      for (int i = 0; i < propertyDescriptors.length; i++) {         PropertyDescriptor descriptor = propertyDescriptors[i];         String propertyName = descriptor.getName();         if (!propertyName.equals("class")) {            Method readMethod = descriptor.getReadMethod();            Object result = readMethod.invoke(bean, new Object[0]);            if (result != null) {               returnMap.put(propertyName, result);            } else {               returnMap.put(propertyName, "");            }         }      }      return returnMap;   }   /**    * 将一个 Map 对象转化为一个 JavaBean    *     * @param type    *            要转化的类型    * @param map    *            包含属性值的 map    * @return 转化出来的 JavaBean 对象    * @throws IntrospectionException    *             如果分析类属性失败    * @throws IllegalAccessException    *             如果实例化 JavaBean 失败    * @throws InstantiationException    *             如果实例化 JavaBean 失败    * @throws InvocationTargetException    *             如果调用属性的 setter 方法失败    */   @SuppressWarnings("rawtypes")   public static Object map2Bean(Class type, Map map)         throws IntrospectionException, IllegalAccessException, InstantiationException, InvocationTargetException {            BeanInfo beanInfo = Introspector.getBeanInfo(type); // 获取类属性      Object obj = type.newInstance(); // 创建 JavaBean 对象      // 给 JavaBean 对象的属性赋值      PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();      for (int i = 0; i < propertyDescriptors.length; i++) {         PropertyDescriptor descriptor = propertyDescriptors[i];         String propertyName = descriptor.getName();         if (map.containsKey(propertyName)) {            // 下面一句可以 try 起来，这样当一个属性赋值失败的时候就不会影响其他属性赋值。            Object value = map.get(propertyName);            Object[] args = new Object[1];            args[0] = value;            descriptor.getWriteMethod().invoke(obj, args);         }      }      return obj;   }   // 将JAVABEAN实体类转为map类型，然后返回一个map类型的值   public static Map<String, Object> beanToMap(Object obj) {      Map<String, Object> params = new HashMap<String, Object>(0);      try {         PropertyUtilsBean propertyUtilsBean = new PropertyUtilsBean();         PropertyDescriptor[] descriptors = propertyUtilsBean.getPropertyDescriptors(obj);         for (int i = 0; i < descriptors.length; i++) {            String name = descriptors[i].getName();            if (!"class".equals(name)) {               params.put(name, propertyUtilsBean.getNestedProperty(obj, name));            }         }      } catch (Exception e) {         e.printStackTrace();      }      return params;   }      public static void main(String[] args)         throws IllegalAccessException, InstantiationException, InvocationTargetException, IntrospectionException {      // 获取分隔符      // System.out.println(System.getProperty("path.separator"));      // java对象拷贝之BeanUtils.copyProperties() 用法      WXUserInfo wxUserInfo = new WXUserInfo();      HostUserInfo hostUserInfo = new HostUserInfo();      wxUserInfo.setCustomerCode("11");      wxUserInfo.setCustomerId("id");      wxUserInfo.setCustomerName("name");      wxUserInfo.setName("aa");      wxUserInfo.setStuNo("001");      wxUserInfo.setUserId("uset");      // BeanUtils.copyProperties(wxUserInfo, hostUserInfo);      // System.out.println(hostUserInfo);      // Map<String, String> hashMap = new HashMap<String, String>();      Map convertBean = MapBeanTransUtils.bean2Map(wxUserInfo);            Map<String, Object> beanToMap = MapBeanTransUtils.beanToMap(wxUserInfo);      // MapBeanTransUtils.beanToMap(obj)      System.out.println(beanToMap);            // map 遍历            for (Map.Entry<String, Object> entry : beanToMap.entrySet()) {         System.out.println("属性名称："+entry.getKey()+"------"+"值："+entry.getValue());      }   }}