一些常用反射工具类.docx

1.反射类可以将map转实体类，或者将实体类转map 将实体类转map没有什么要求将map转实体类要求实体类名称和map的key名称一致，实体类个数和map的个数可以不一致需要一个jar包 mons.beanutils.ConvertUtils;publicclass ReflectUtil {privatestatic ListString typeList = new ArrayListString();static {typeList.add(String);typeList.add(Boolean);typeList.add(Integer);typeList.add(Float);typeList.add(Double);typeList.add(Long);typeList.add(Short);}@SuppressWarnings(rawtypes)/** * 获取一个类中的泛型类型 * @param clazz * @return */publicstatic Class getGenericParmeterType(Class clazz) {Type type = clazz.getGenericSuperclass();ParameterizedType pt = (ParameterizedType) type;Type[] types = pt.getActualTypeArguments();return (Class?) types[0];}/** * map 转实体类 * * @param map * map集合 * @param obj * 转到哪一个实体类 * @return返回实体类 */publicstatic Object MapToEntity(Map map, Object obj) {Field[] field = obj.getClass().getDeclaredFields();for (Field f : field) {try {Class? type = f.getType();Object value = map.get(f.getName());if (value != null) {Method method = obj.getClass().getMethod(methodTo(set, f.getName()), f.getType());method.invoke(obj,ConvertUtils.convert(value.toString(), type));}} catch (SecurityException e) {e.printStackTrace();} catch (IllegalArgumentException e) {e.printStackTrace();} catch (IllegalAccessException e) {e.printStackTrace();} catch (InvocationTargetException e) {e.printStackTrace();} catch (NoSuchMethodException e) {e.printStackTrace();}}return obj;}/** * 构建方法字符串 * @param pre 前缀 * @param str 方方名 * @return */privatestatic String methodTo(String pre, String str) {return pre + String.valueOf(str.charAt(0)).toUpperCase()+ str.substring(1);}/** * 实体类转Map集合 * * @param obj * 对象 * @return */publicstatic Map EntityToMap(Object obj) {MapString, Object map = new HashMapString, Object();Field[] field = obj.getClass().getDeclaredFields();for (Field f : field) {try {Class? type = f.getType();String prefix = get;String t = type.getSimpleName();String full = type.getName();if (t.equals(full)) {if (!StringUtils.isEmpty(t)) {if (t.toLowerCas