map和bean转换

作者: chen1null | 来源:发表于2018-04-09 12:17 被阅读0次

    package com.test;

    import java.util.HashMap;

    import java.util.Map;

    import java.util.Map.Entry;

    import org.apache.commons.beanutils.BeanUtils;

    import org.slf4j.Logger;

    import org.slf4j.LoggerFactory;

    import com.pojo.User;

    public class TestMapBeanConvert {

        private static Logger LOGGER = LoggerFactory.getLogger(TestMapBeanConvert.class);

        // 将map转为bean

        public staticT mapToBean(Map<String, Object> map, Class clz) {

            T bean = null;

            try {

                  bean = clz.newInstance();

                // 遍历map中的key,若bean中有这个属性(key),将key对应的value赋值给bean对应的属性

                BeanUtils.populate(bean, map); // 将map转为bean

            } catch (Exception e) {

                LOGGER.info("ERROR ------> " + e.getMessage());

            }

            return bean;

        }

        // 将bean转为map

        public staticMapbeanToMap(Object bean) {

            Map<String, String> map = null;

            try {

                map = BeanUtils.describe(bean); // 将bean转为map

            } catch (Exception e) {

                  LOGGER.info("ERROR ------> " + e.getMessage());

           }

           return map;

           }

           public static void main(String[] args) {

                  Map<String, Object> map = new HashMap<String, Object>();

                  map.put("name", "六月");

                  map.put("age",6);

                  System.err.println("-------------------- from map to bean --------------------");

                  User user = mapToBean(map, User.class);System.err.println(user.toString());

                  System.err.println("-------------------- from bean to map --------------------");

                  Map<String, String> toMap = beanToMap(user);

                  for(Entry<String, String> entry:toMap.entrySet()){

                         System.out.println("key=" +entry.getKey() +" and value="+entry.getValue()); 

                  } 

           }

    }

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