1、在jsp页面中被禁用的不会传值到后台,例如checkbox select 标签等,解决办法隐藏域
2、将以个对象的属性转为一个map(继承来的字段不能转, 如果为null 则不会放进map中,0 要放入)
/**
* 将一个类查询方式加入map(属性值为int型时,0时不加入,
* 属性值为String型或Long时为null和“”不加入)
* @param obj
* @return
*/
public static Map<String, Object> setConditionMap(Object obj) {
Map<String, Object> map = new HashMap<String, Object>();
if (obj == null) {
return null;
}
Field[] fields = obj.getClass().getDeclaredFields();
for (Field field : fields) {
String fieldName = field.getName();
if (getValueByFieldName(fieldName, obj) != null)
map.put(fieldName, getValueByFieldName(fieldName, obj));
}
return map;
}
/**
* 根据属性名获取该类此属性的值
* @param fieldName
* @param object
* @return
*/
private static Object getValueByFieldName(String fieldName, Object object) {
String firstLetter = fieldName.substring(0, 1).toUpperCase();
String getter = "get" + firstLetter + fieldName.substring(1);
try {
Method method = object.getClass().getMethod(getter, new Class[] {});
Object value = method.invoke(object, new Object[] {});
return value;
} catch (Exception e) {
return null;
}
}