bean和map转换的代码（参考）

原文：https://www.jianshu.com/p/70a626f83336

 

 1 /**
 2      * 将对象装换为map
 3      *
 4      * @param bean
 5      * @return
 6      */
 7     public static <T> Map<String, Object> beanToMap(T bean) {
 8         Map<String, Object> map = Maps.newHashMap();
 9         if (bean != null) {
10             BeanMap beanMap = BeanMap.create(bean);
11             for (Object key : beanMap.keySet()) {
12                 map.put(key + "", beanMap.get(key));
13             }
14         }
15         return map;
16     }
17 
18     /**
19      * 将map装换为javabean对象
20      *
21      * @param map
22      * @param bean
23      * @return
24      */
25     public static <T> T mapToBean(Map<String, Object> map, T bean) {
26         BeanMap beanMap = BeanMap.create(bean);
27         beanMap.putAll(map);
28         return bean;
29     }
30 
31     /**
32      * 将List<T>转换为List<Map<String, Object>>
33      *
34      * @param objList
35      * @return
36      * @throws JsonGenerationException
37      * @throws JsonMappingException
38      * @throws IOException
39      */
40     public static <T> List<Map<String, Object>> objectsToMaps(List<T> objList) {
41         List<Map<String, Object>> list = Lists.newArrayList();
42         if (objList != null && objList.size() > 0) {
43             Map<String, Object> map = null;
44             T bean = null;
45             for (int i = 0, size = objList.size(); i < size; i++) {
46                 bean = objList.get(i);
47                 map = beanToMap(bean);
48                 list.add(map);
49             }
50         }
51         return list;
52     }
53 
54     /**
55      * 将List<Map<String,Object>>转换为List<T>
56      *
57      * @param maps
58      * @param clazz
59      * @return
60      * @throws InstantiationException
61      * @throws IllegalAccessException
62      */
63     public static <T> List<T> mapsToObjects(List<Map<String, Object>> maps, Class<T> clazz)
64             throws InstantiationException, IllegalAccessException {
65         List<T> list = Lists.newArrayList();
66         if (maps != null && maps.size() > 0) {
67             Map<String, Object> map = null;
68             T bean = null;
69             for (int i = 0, size = maps.size(); i < size; i++) {
70                 map = maps.get(i);
71                 bean = clazz.newInstance();
72                 mapToBean(map, bean);
73                 list.add(bean);
74             }
75         }
76         return list;
77     }

 

posted on 2020-08-28 17:06  东方1024  阅读(266)  评论(0)    收藏  举报

导航