1 /**
2 * 使用org.apache.commons.beanutils进行转换
3 */
4 class A {
5
6 public static Object mapToObject(Map<String, Object> map, Class<?> beanClass) throws Exception {
7 if (map == null)
8 return null;
9
10 Object obj = beanClass.newInstance();
11
12 org.apache.commons.beanutils.BeanUtils.populate(obj, map);
13
14 return obj;
15 }
16
17 public static Map<?, ?> objectToMap(Object obj) {
18 if(obj == null)
19 return null;
20
21 return new org.apache.commons.beanutils.BeanMap(obj);
22 }
23
24 }
25
26 /**
27 * 使用Introspector进行转换
28 */
29 class B {
30
31 public static Object mapToObject(Map<String, Object> map, Class<?> beanClass) throws Exception {
32 if (map == null)
33 return null;
34
35 Object obj = beanClass.newInstance();
36
37 BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
38 PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
39 for (PropertyDescriptor property : propertyDescriptors) {
40 Method setter = property.getWriteMethod();
41 if (setter != null) {
42 setter.invoke(obj, map.get(property.getName()));
43 }
44 }
45
46 return obj;
47 }
48
49 public static Map<String, Object> objectToMap(Object obj) throws Exception {
50 if(obj == null)
51 return null;
52
53 Map<String, Object> map = new HashMap<String, Object>();
54
55 BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
56 PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
57 for (PropertyDescriptor property : propertyDescriptors) {
58 String key = property.getName();
59 if (key.compareToIgnoreCase("class") == 0) {
60 continue;
61 }
62 Method getter = property.getReadMethod();
63 Object value = getter!=null ? getter.invoke(obj) : null;
64 map.put(key, value);
65 }
66
67 return map;
68 }
69
70 }
71
72 /**
73 * 使用reflect进行转换
74 */
75 class C {
76
77 public static Object mapToObject(Map<String, Object> map, Class<?> beanClass) throws Exception {
78 if (map == null)
79 return null;
80
81 Object obj = beanClass.newInstance();
82
83 Field[] fields = obj.getClass().getDeclaredFields();
84 for (Field field : fields) {
85 int mod = field.getModifiers();
86 if(Modifier.isStatic(mod) || Modifier.isFinal(mod)){
87 continue;
88 }
89
90 field.setAccessible(true);
91 field.set(obj, map.get(field.getName()));
92 }
93
94 return obj;
95 }
96
97 public static Map<String, Object> objectToMap(Object obj) throws Exception {
98 if(obj == null){
99 return null;
100 }
101
102 Map<String, Object> map = new HashMap<String, Object>();
103
104 Field[] declaredFields = obj.getClass().getDeclaredFields();
105 for (Field field : declaredFields) {
106 field.setAccessible(true);
107 map.put(field.getName(), field.get(obj));
108 }
109
110 return map;
111 }
112 }
