java实现bean转map的BeanMapUtil工具类

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import java.util.List;
import java.util.Map;
 
import org.springframework.cglib.beans.BeanMap;
 
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
 
public class BeanMapUtil {
 
    /**
     * 将对象装换为map
     * @param bean
     * @return
     */ 
    public static <T> Map<String, Object> beanToMap(T bean) { 
        Map<String, Object> map = Maps.newHashMap(); 
        if (bean != null) { 
            BeanMap beanMap = BeanMap.create(bean); 
            for (Object key : beanMap.keySet()) { 
                map.put(key+"", beanMap.get(key)); 
            }            
        } 
        return map; 
    } 
       
    /**
     * 将map装换为javabean对象
     * @param map
     * @param bean
     * @return
     */ 
    public static <T> T mapToBean(Map<String, Object> map,T bean) { 
        BeanMap beanMap = BeanMap.create(bean); 
        beanMap.putAll(map); 
        return bean; 
    } 
       
    /**
     * 将List<T>转换为List<Map<String, Object>>
     * @param objList
     * @return
     * @throws JsonGenerationException
     * @throws JsonMappingException
     * @throws IOException
     */ 
    public static <T> List<Map<String, Object>> objectsToMaps(List<T> objList) { 
        List<Map<String, Object>> list = Lists.newArrayList(); 
        if (objList != null && objList.size() > 0) { 
            Map<String, Object> map = null; 
            T bean = null; 
            for (int i = 0,size = objList.size(); i < size; i++) { 
                bean = objList.get(i); 
                map = beanToMap(bean); 
                list.add(map); 
            } 
        } 
        return list; 
    } 
       
    /**
     * 将List<Map<String,Object>>转换为List<T>
     * @param maps
     * @param clazz
     * @return
     * @throws InstantiationException
     * @throws IllegalAccessException
     */ 
    public static <T> List<T> mapsToObjects(List<Map<String, Object>> maps,Class<T> clazz) throws InstantiationException, IllegalAccessException { 
        List<T> list = Lists.newArrayList(); 
        if (maps != null && maps.size() > 0) { 
            Map<String, Object> map = null; 
            T bean = null; 
            for (int i = 0,size = maps.size(); i < size; i++) { 
                map = maps.get(i); 
                bean = clazz.newInstance(); 
                mapToBean(map, bean); 
                list.add(bean); 
            } 
        } 
        return list;
    }
}

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