javaBean与map类型相互转换

/**
   * 把Map键值对转化为javaBean对象
   * 
   * @param type
   * @param map
   * @return
   * @throws Exception
   */
  private Object transforMapToObject(Class<? extends Object> type, Map<String, String> map) throws Exception {
    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)) {
        try {
          Object value = map.get(propertyName);
          Object[] args = new Object[1];
          args[0] = value;
          descriptor.getWriteMethod().invoke(obj, args);
        } catch (Exception e) {
          e.printStackTrace();
        }
      }
    }
    return obj;
  }

  /**
   * 把javaBean对象转换为Map键值对
   * 
   * @param bean
   * @return
   * @throws Exception
   */
  private Map<String, String> transforObjectToMap(Object bean) throws Exception {
    Class<? extends Object> type = bean.getClass();
    Map<String, String> returnMap = new HashMap<String, String>();
    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.toString());
        }
      }
    }
    return returnMap;
  }