对Map里的数据进行封装（数据类型和判空处理）_public class custommap

废话不说，直接上代码

public class CustomHashMap<K, V> extends java.util.HashMap<K, V> {

    private static final long serialVersionUID = 1864601112267440506L;

    @SuppressWarnings({ "rawtypes", "unchecked" })
    public static CustomHashMap convert(HashMap map){

        CustomHashMap result = new CustomHashMap();

        for(Object key : map.keySet()) {
            result.put(key, map.get(key));
        }

        return result;
    }

    public String getString(K key){
        Object object = get(key);
        if(object != null){
            return object.toString();
        }
        return null;
    }

    public String getString(K key, String defaultValue){
        Object object = get(key);
        if(object != null){
            return object.toString();
        }
        return defaultValue;
    }

    public Boolean getBoolean(K key){
        Object object = get(key);
        if(object != null){
            return (Boolean)object;
        }
        return false;
    }

    public int getInt(K key){
        Object object = get(key);
        if(object != null){
            return NumberUtils.toInt(object.toString());
        }
        return 0;
    }

    public Integer getInteger(K key){
        Object object = get(key);
        if(object != null){
            return NumberUtils.toInt(object.toString());
        }
        return null;
    }

    public BigInteger getBigInteger(K key){
        Object object = get(key);
        if(object != null){
            return BigInteger.valueOf(Integer.valueOf(object.toString()));
        }
        return BigInteger.ZERO;
    }

    public BigDecimal getBigDecimal(K key) {
        Object object = get(key);
        if(object != null){
            return BigDecimal.valueOf(Double.valueOf(object.toString()));
        }
        return BigDecimal.ZERO;
    }

    public Long getLong(K key){
        Object object = get(key);
        if(object != null){
            return Long.valueOf(object.toString());
        }
        return null;
    }

    public Float getFloat(K key){
        Object object = get(key);
        if(object != null){
            return Float.valueOf(object.toString());
        }
        return null;
    }

    public Double getDouble(K key){
        Object object = get(key);
        if(object != null){
            return Double.valueOf(object.toString());
        }
        return null;
    }

    public Date getDate(K key) {
        Object object = get(key);
        if(object != null){
            return (Date)object;
        }
        return null;
    }

    public Time getTime(K key) {
        Object object = get(key);
        if(object != null){
            SimpleDateFormat sdf = new SimpleDateFormat("HH:mm");
            java.util.Date date  = null;
            try {
                date = sdf.parse(object.toString());
                return new Time(date.getTime());
            } catch (ParseException e) {
                return null;
            }
        }
        return null;
    }

    @SuppressWarnings("unchecked")
    public HashMap<Object, Object> getHashMap(K key) {
        Object object = get(key);
        if(object != null){
            return (HashMap<Object, Object>)object;
        }
        return null;
    }

    @SuppressWarnings("unchecked")
    public CustomHashMap<Object, Object> getCustomHashMap(K key) {
        Object object = get(key);
        if(object != null){
            return (CustomHashMap<Object, Object>)object;
        }
        return null;
    }
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137

有什么需要改善的地方，希望大家指出来！