java反射机制完成List<Object>与List<Map<String, Object>>之间互相转换

编写转换帮助类

* 将JavaBean转换成Map * @param obj * @return * @throws SecurityException * @throws NoSuchMethodException * @throws InvocationTargetException * @throws IllegalArgumentException * @throws IllegalAccessException public static Map beanToMap(Object obj) throws NoSuchMethodException, SecurityException, IllegalAccessException, IllegalArgumentException, InvocationTargetException { // 创建map集合 Map map = new HashMap(); // 获取JavaBean中所有属性 Field[] fields = obj.getClass().getDeclaredFields(); for (Field fie : fields) { // 将属性第一个字母转换成大写 String frist = fie.getName().substring(0, 1).toUpperCase(); // 获取属性的类型 Class<?> type = fie.getType(); // 封装属性的get String getter = ""; if ("boolean".equals(type.getName())) { getter = "is" + frist + fie.getName().substring(1); } else { getter = "get" + frist + fie.getName().substring(1); // 获取JavaBean的方法 Method method = obj.getClass().getMethod(getter, new Class[] {}); // 调用方法,并接收返回值 Object objec = method.invoke(obj, new Object[] {}); // 判断返回值不为空 if (objec != null) { map.put(fie.getName(), objec); } else { map.put(fie.getName(), ""); return map; * 将Map转换为JavaBean * @param map * @param obj * @return * @throws SecurityException * @throws NoSuchMethodException * @throws InvocationTargetException * @throws IllegalArgumentException * @throws IllegalAccessException public static Object mapToBean(Map<String, Object> map, Object obj) throws NoSuchMethodException, SecurityException, IllegalAccessException, IllegalArgumentException, InvocationTargetException { // 获取JavaBean中的所有属性 Field[] field = obj.getClass().getDeclaredFields(); for (Field fi : field) { // 判断key值是否存在 if (map.containsKey(fi.getName())) { // 获取key的value值 String value = map.get(fi.getName()).toString(); // 将属性的第一个字母转换为大写 String frist = fi.getName().substring(0, 1).toUpperCase(); // 属性封装set方法 String setter = "set" + frist + fi.getName().substring(1); // 获取当前属性类型 Class<?> type = fi.getType(); // 获取JavaBean的方法,并设置类型 Method method = obj.getClass().getMethod(setter, type); // 判断属性为double类型 if ("java.lang.String".equals(type.getName())) { // 调用当前Javabean中set方法，并传入指定类型参数 method.invoke(obj, value); } else if ("int".equals(type.getName())) { method.invoke(obj, Integer.parseInt(value)); }else if ("double".equals(type.getName())) { method.invoke(obj, Double.valueOf(value)); } else if ("char".equals(type.getName())) { method.invoke(obj, value); return obj; * 将List<Map<String,Object>>转换成List<javaBean> * @param listm * @param obj * @return * @throws InvocationTargetException * @throws IllegalArgumentException * @throws IllegalAccessException * @throws SecurityException * @throws NoSuchMethodException public static List<Object> ListMapToListBean(List<Map<String, Object>> listm, Object obj) throws NoSuchMethodException, SecurityException, IllegalAccessException, IllegalArgumentException, InvocationTargetException { List<Object> list = new ArrayList<Object>(); // 循环遍历出map对象 for (Map<String, Object> m : listm) { // 调用将map转换为JavaBean的方法 Object objs = mapToBean(m, obj); // 添加进list集合 list.add(objs); return list; * 将list<javabean>转换为List<Map> * @param list * @return * @throws NoSuchMethodException * @throws SecurityException * @throws IllegalAccessException * @throws IllegalArgumentException * @throws InvocationTargetException public static List<Map<String, Object>> ListBeanToListMap(List<Object> list) throws NoSuchMethodException, SecurityException, IllegalAccessException, IllegalArgumentException, InvocationTargetException { List<Map<String, Object>> listmap = new ArrayList<Map<String, Object>>(); for (Object ob : list) { listmap.add(beanToMap(ob));