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- package org.jeecg.common.util;
- import lombok.extern.slf4j.Slf4j;
- import java.lang.reflect.Field;
- import java.lang.reflect.Method;
- import java.util.*;
- import java.util.Map.Entry;
- import java.util.regex.Pattern;
- /**
- * @author 张代浩
- * @desc 通过反射来动态调用get 和 set 方法
- */
- @Slf4j
- public class ReflectHelper {
- private Class cls;
- /**
- * 传过来的对象
- */
- private Object obj;
- /**
- * 存放get方法
- */
- private Hashtable<String, Method> getMethods = null;
- /**
- * 存放set方法
- */
- private Hashtable<String, Method> setMethods = null;
- /**
- * 定义构造方法 -- 一般来说是个pojo
- *
- * @param o 目标对象
- */
- public ReflectHelper(Object o) {
- obj = o;
- initMethods();
- }
- /**
- * @desc 初始化
- */
- public void initMethods() {
- getMethods = new Hashtable<String, Method>();
- setMethods = new Hashtable<String, Method>();
- cls = obj.getClass();
- Method[] methods = cls.getMethods();
- // 定义正则表达式,从方法中过滤出getter / setter 函数.
- String gs = "get(\\w+)";
- Pattern getM = Pattern.compile(gs);
- String ss = "set(\\w+)";
- Pattern setM = Pattern.compile(ss);
- // 把方法中的"set" 或者 "get" 去掉
- String rapl = "$1";
- String param;
- for (int i = 0; i < methods.length; ++i) {
- Method m = methods[i];
- String methodName = m.getName();
- if (Pattern.matches(gs, methodName)) {
- param = getM.matcher(methodName).replaceAll(rapl).toLowerCase();
- getMethods.put(param, m);
- } else if (Pattern.matches(ss, methodName)) {
- param = setM.matcher(methodName).replaceAll(rapl).toLowerCase();
- setMethods.put(param, m);
- } else {
- // logger.info(methodName + " 不是getter,setter方法!");
- }
- }
- }
- /**
- * @desc 调用set方法
- */
- public boolean setMethodValue(String property, Object object) {
- Method m = setMethods.get(property.toLowerCase());
- if (m != null) {
- try {
- // 调用目标类的setter函数
- m.invoke(obj, object);
- return true;
- } catch (Exception ex) {
- log.info("invoke getter on " + property + " error: " + ex.toString());
- return false;
- }
- }
- return false;
- }
- /**
- * @desc 调用set方法
- */
- public Object getMethodValue(String property) {
- Object value = null;
- Method m = getMethods.get(property.toLowerCase());
- if (m != null) {
- try {
- /*
- * 调用obj类的setter函数
- */
- value = m.invoke(obj, new Object[]{});
- } catch (Exception ex) {
- log.info("invoke getter on " + property + " error: " + ex.toString());
- }
- }
- return value;
- }
- /**
- * 把map中的内容全部注入到obj中
- *
- * @param data
- * @return
- */
- public Object setAll(Map<String, Object> data) {
- if (data == null || data.keySet().size() <= 0) {
- return null;
- }
- for (Entry<String, Object> entry : data.entrySet()) {
- this.setMethodValue(entry.getKey(), entry.getValue());
- }
- return obj;
- }
- /**
- * 把map中的内容全部注入到obj中
- *
- * @param o
- * @param data
- * @return
- */
- public static Object setAll(Object o, Map<String, Object> data) {
- ReflectHelper reflectHelper = new ReflectHelper(o);
- reflectHelper.setAll(data);
- return o;
- }
- /**
- * 把map中的内容全部注入到新实例中
- *
- * @param clazz
- * @param data
- * @return
- */
- @SuppressWarnings("unchecked")
- public static <T> T setAll(Class<T> clazz, Map<String, Object> data) {
- T o = null;
- try {
- o = clazz.newInstance();
- } catch (Exception e) {
- e.printStackTrace();
- o = null;
- return o;
- }
- return (T) setAll(o, data);
- }
- /**
- * 根据传入的class将mapList转换为实体类list
- *
- * @param mapist
- * @param clazz
- * @return
- */
- public static <T> List<T> transList2Entrys(List<Map<String, Object>> mapist, Class<T> clazz) {
- List<T> list = new ArrayList<T>();
- if (mapist != null && mapist.size() > 0) {
- for (Map<String, Object> data : mapist) {
- list.add(ReflectHelper.setAll(clazz, data));
- }
- }
- return list;
- }
- /**
- * 根据属性名获取属性值
- */
- public static Object getFieldValueByName(String fieldName, Object o) {
- try {
- String firstLetter = fieldName.substring(0, 1).toUpperCase();
- String getter = "get" + firstLetter + fieldName.substring(1);
- Method method = o.getClass().getMethod(getter, new Class[]{});
- Object value = method.invoke(o, new Object[]{});
- return value;
- } catch (Exception e) {
- e.printStackTrace();
- return null;
- }
- }
- /**
- * 获取属性名数组
- */
- public static String[] getFiledName(Object o) {
- Field[] fields = o.getClass().getDeclaredFields();
- String[] fieldNames = new String[fields.length];
- for (int i = 0; i < fields.length; i++) {
- //log.info(fields[i].getType());
- fieldNames[i] = fields[i].getName();
- }
- return fieldNames;
- }
- /**
- * 获取属性类型(type),属性名(name),属性值(value)的map组成的list
- */
- public static List<Map> getFiledsInfo(Object o) {
- Field[] fields = o.getClass().getDeclaredFields();
- String[] fieldNames = new String[fields.length];
- List<Map> list = new ArrayList<Map>();
- Map<String, Object> infoMap = null;
- for (int i = 0; i < fields.length; i++) {
- infoMap = new HashMap<String, Object>();
- infoMap.put("type", fields[i].getType().toString());
- infoMap.put("name", fields[i].getName());
- infoMap.put("value", getFieldValueByName(fields[i].getName(), o));
- list.add(infoMap);
- }
- return list;
- }
- /**
- * 获取对象的所有属性值,返回一个对象数组
- */
- public static Object[] getFiledValues(Object o) {
- String[] fieldNames = getFiledName(o);
- Object[] value = new Object[fieldNames.length];
- for (int i = 0; i < fieldNames.length; i++) {
- value[i] = getFieldValueByName(fieldNames[i], o);
- }
- return value;
- }
- }
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