Java map和bean互转常用的方法总结

        LTDemo ltDemo = BeanUtil.mapToBean(map, LTDemo.class, true, CopyOptions.create());
        Map<String, Object> demoMap = BeanUtil.beanToMap(ltDemo);
        System.out.println("输出map -> bean: " + ltDemo.toString());
        System.out.println("输出bean -> map : " + demoMap);
        System.out.println(ltDemo.getApplyTime());
        System.out.println(ltDemo.getChildren());
        ltDemo.getChildren().forEach(children -> System.out.println(children.toString()));
        ltDemo.getChildren().forEach(children -> System.out.println(children.getAddress()));

        LTDemo ltDemo = JSONObject.parseObject(JSONObject.toJSONString(map), LTDemo.class);
        Map demoMap = JSONObject.parseObject(JSONObject.toJSONString(ltDemo), Map.class);
        System.out.println("输出map -> bean: " + ltDemo.toString());
        System.out.println("输出bean -> map : " + demoMap);
        System.out.println(ltDemo.getApplyTime());
        System.out.println(ltDemo.getChildren());
        ltDemo.getChildren().forEach(children -> System.out.println(children.toString()));
        ltDemo.getChildren().forEach(children -> System.out.println(children.getAddress()));

    //-------------------    beanutils_BeanUtils  -----------------
    //map转java对象
    public static <T> T beanUtils_mapToObject(Map<String, Object> map, Class<T> clazz) throws Exception {
        if (map == null) {
            return null;
        }
        T bean = clazz.newInstance();
        BeanUtils.populate(bean, map);
        return bean;
    }

        LTDemo ltDemo = beanUtils_mapToObject(map, LTDemo.class);
        System.out.println("输出map -> bean: " + ltDemo.toString());
        System.out.println(ltDemo.getApplyTime());
        System.out.println(ltDemo.getChildren().get(0).getApplyTime());

import net.sf.cglib.beans.BeanMap;
    // -------------------   cglib BeanMap  -------------------
    //map对象转java
    public static <T> T BeanMapMapToObject(Map<String, Object> map, Class<T> beanClass) throws Exception {
        T object = beanClass.newInstance();
        BeanMap beanMap = BeanMap.create(object);
        beanMap.putAll(map);
        return object;
    }
    //java对象转map
    public static Map<String, Object> BeanMapObjectToMap(Object obj) {
        Map<String, Object> map = Maps.newHashMap();
        if (obj != null) {
            BeanMap beanMap = BeanMap.create(obj);
            for (Object key : beanMap.keySet()) {
                map.put(key + "", beanMap.get(key));
            }
        }
        return map;
    }

        LTDemo ltDemo = beanMapMapToObject(map, LTDemo.class);
        Map demoMap = beanMapObjectToMap(ltDemo);
        System.out.println("输出map -> bean: " + ltDemo.toString());
        System.out.println("输出bean -> map : " + demoMap);
        System.out.println(ltDemo.getApplyTime());
        System.out.println(ltDemo.getChildren());
        ltDemo.getChildren().forEach(children -> System.out.println(children.toString()));

    //-------------------   reflect     -------------------
    //map转java对象
    public static Object reflectMapToObject(Map<String, Object> map, Class<?> beanClass) throws Exception {
        if (map == null) {
            return null;
        }
        Object object = beanClass.newInstance();
        Field[] fields = beanClass.getDeclaredFields();
        for (Field field : fields) {
            int mod = field.getModifiers();
            if (Modifier.isFinal(mod) || Modifier.isStatic(mod)) {
                continue;
            }
            field.setAccessible(true);
            field.set(object, map.get(field.getName()));
        }
        return object;
    }
    //java对象转map
    public static Map<String, Object> reflectObjectToMap(Object obj) throws Exception {
        if (obj == null) {
            return null;
        }
        Map<String, Object> map = new HashMap<String, Object>();
        Field[] declaredFields = obj.getClass().getDeclaredFields();
        for (Field field : declaredFields) {
            field.setAccessible(true);
            map.put(field.getName(), field.get(obj));
        }
        return map;
    }

        LTDemo ltDemo = reflectMapToObject(map,LTDemo.class);
        Map demoMap = reflectObjectToMap(ltDemo);
        System.out.println("输出map -> bean: " + ltDemo.toString());
        System.out.println("输出bean -> map : " + demoMap);
        System.out.println(ltDemo.getApplyTime());
        System.out.println(ltDemo.getChildren());
        ltDemo.getChildren().forEach(children -> System.out.println(children.toString()));

import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
 //----------------- Introspector    ------------------
    //map转java对象
    public static <T> T introspector_mapToObject(Map<String, Object> map, Class<T> clazz) throws Exception {
        if (map == null) {
            return null;
        }
        T bean = clazz.newInstance();
        BeanInfo beanInfo = Introspector.getBeanInfo(bean.getClass());
        PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
        for (PropertyDescriptor property : propertyDescriptors) {
            Method setter = property.getWriteMethod();
            if (setter != null) {
                setter.invoke(bean, map.get(property.getName()));
            }
        }
        return bean;
    }
    //java对象转map
    public static Map<String, Object> introspector_objectToMap(Object obj) throws Exception {
        if (obj == null) {
            return null;
        }
        Map<String, Object> map = new HashMap<String, Object>();
        BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
        PropertyDescriptor[] propertyDescriptors = beanInfo
                .getPropertyDescriptors();
        for (PropertyDescriptor property : propertyDescriptors) {
            String key = property.getName();
            if (key.compareToIgnoreCase("class") == 0) {
                continue;
            }
            Method getter = property.getReadMethod();
            Object value = getter != null ? getter.invoke(obj) : null;
            map.put(key, value);
        }
        return map;
    }

        LTDemo ltDemo = introspector_mapToObject(map, LTDemo.class);
        Map demoMap = introspector_objectToMap(ltDemo);
        System.out.println("输出map -> bean: " + ltDemo.toString());
        System.out.println("输出bean -> map : " + demoMap);
        System.out.println(ltDemo.getApplyTime());
        System.out.println(ltDemo.getChildren());
        System.out.println(ltDemo.getChildren().get(0).toString());