net.sf.JSON

1
.
/**
2.     * 从一个JSON 对象字符格式中得到一个java对象，形如：
3.     * {"id" : idValue, "name" : nameValue, "aBean" : {"aBeanId" : aBeanIdValue, ...}}
4.     * @param object
5.     * @param clazz
6.     * @return
7.     */
8
.    
public
 
static
 Object getDTO(String jsonString, Class clazz){
9
.        JSONObject jsonObject = 
null
;
10
.        
try
{
11
.            setDataFormat2JAVA();
12
.            jsonObject = JSONObject.fromObject(jsonString);
13
.        }
catch
(Exception e){
14
.            e.printStackTrace();
15
.        }
16
.        
return
 JSONObject.toBean(jsonObject, clazz);
17
.    }
18
.
19
.    
/**
20.     * 从一个JSON 对象字符格式中得到一个java对象，其中beansList是一类的集合，形如：
21.     * {"id" : idValue, "name" : nameValue, "aBean" : {"aBeanId" : aBeanIdValue, ...},
22.     * beansList:[{}, {}, ...]}
23.     * @param jsonString
24.     * @param clazz
25.     * @param map 集合属性的类型 (key : 集合属性名, value : 集合属性类型class) eg: ("beansList" : Bean.class)
26.     * @return
27.     */
28
.    
public
 
static
 Object getDTO(String jsonString, Class clazz, Map map){
29
.        JSONObject jsonObject = 
null
;
30
.        
try
{
31
.            setDataFormat2JAVA();
32
.            jsonObject = JSONObject.fromObject(jsonString);
33
.        }
catch
(Exception e){
34
.            e.printStackTrace();
35
.        }
36
.        
return
 JSONObject.toBean(jsonObject, clazz, map);
37
.    }
38
.
39
.    
/**
40.     * 从一个JSON数组得到一个java对象数组，形如：
41.     * [{"id" : idValue, "name" : nameValue}, {"id" : idValue, "name" : nameValue}, ...]
42.     * @param object
43.     * @param clazz
44.     * @return
45.     */
46
.    
public
 
static
 Object[] getDTOArray(String jsonString, Class clazz){
47
.        setDataFormat2JAVA();
48
.        JSONArray array = JSONArray.fromObject(jsonString);
49
.        Object[] obj = 
new
 Object[array.size()];
50
.        
for
(
int
 i = 
0
; i < array.size(); i++){
51
.            JSONObject jsonObject = array.getJSONObject(i);
52
.            obj[i] = JSONObject.toBean(jsonObject, clazz);
53
.        }
54
.        
return
 obj;
55
.    }
56
.
57
.    
/**
58.     * 从一个JSON数组得到一个java对象数组，形如：
59.     * [{"id" : idValue, "name" : nameValue}, {"id" : idValue, "name" : nameValue}, ...]
60.     * @param object
61.     * @param clazz
62.     * @param map
63.     * @return
64.     */
65
.    
public
 
static
 Object[] getDTOArray(String jsonString, Class clazz, Map map){
66
.        setDataFormat2JAVA();
67
.        JSONArray array = JSONArray.fromObject(jsonString);
68
.        Object[] obj = 
new
 Object[array.size()];
69
.        
for
(
int
 i = 
0
; i < array.size(); i++){
70
.            JSONObject jsonObject = array.getJSONObject(i);
71
.            obj[i] = JSONObject.toBean(jsonObject, clazz, map);
72
.        }
73
.        
return
 obj;
74
.    }
75
.
76
.    
/**
77.     * 从一个JSON数组得到一个java对象集合
78.     * @param object
79.     * @param clazz
80.     * @return
81.     */
82
.    
public
 
static
 List getDTOList(String jsonString, Class clazz){
83
.        setDataFormat2JAVA();
84
.        JSONArray array = JSONArray.fromObject(jsonString);
85
.        List list = 
new
 ArrayList();
86
.        
for
(Iterator iter = array.iterator(); iter.hasNext();){
87
.            JSONObject jsonObject = (JSONObject)iter.next();
88
.            list.add(JSONObject.toBean(jsonObject, clazz));
89
.        }
90
.        
return
 list;
91
.    }
92
.
93
.    
/**
94.     * 从一个JSON数组得到一个java对象集合，其中对象中包含有集合属性
95.     * @param object
96.     * @param clazz
97.     * @param map 集合属性的类型
98.     * @return
99.     */
100
.    
public
 
static
 List getDTOList(String jsonString, Class clazz, Map map){
101
.        setDataFormat2JAVA();
102
.        JSONArray array = JSONArray.fromObject(jsonString);
103
.        List list = 
new
 ArrayList();
104
.        
for
(Iterator iter = array.iterator(); iter.hasNext();){
105
.            JSONObject jsonObject = (JSONObject)iter.next();
106
.            list.add(JSONObject.toBean(jsonObject, clazz, map));
107
.        }
108
.        
return
 list;
109
.    }
110
.
111
.    
/**
112.     * 从json HASH表达式中获取一个map，该map支持嵌套功能
113.     * 形如：{"id" : "johncon", "name" : "小强"}
114.     * 注意commons-collections版本，必须包含org.apache.commons.collections.map.MultiKeyMap
115.     * @param object
116.     * @return
117.     */
118
.    
public
 
static
 Map getMapFromJson(String jsonString) {
119
.        setDataFormat2JAVA();
120
.        JSONObject jsonObject = JSONObject.fromObject(jsonString);
121
.        Map map = 
new
 HashMap();
122
.        
for
(Iterator iter = jsonObject.keys(); iter.hasNext();){
123
.            String key = (String)iter.next();
124
.            map.put(key, jsonObject.get(key));
125
.        }
126
.        
return
 map;
127
.    }
128
.
129
.    
/**
130.     * 从json数组中得到相应java数组
131.     * json形如：["123", "456"]
132.     * @param jsonString
133.     * @return
134.     */
135
.    
public
 
static
 Object[] getObjectArrayFromJson(String jsonString) {
136
.        JSONArray jsonArray = JSONArray.fromObject(jsonString);
137
.        
return
 jsonArray.toArray();
138
.    }
139
.
140
.
141
.    
/**
142.     * 把数据对象转换成json字符串
143.     * DTO对象形如：{"id" : idValue, "name" : nameValue, ...}
144.     * 数组对象形如：[{}, {}, {}, ...]
145.     * map对象形如：{key1 : {"id" : idValue, "name" : nameValue, ...}, key2 : {}, ...}
146.     * @param object
147.     * @return
148.     */
149
.    
public
 
static
 String getJSONString(Object object) 
throws
 Exception{
150
.        String jsonString = 
null
;
151
.        
//日期值处理器
152
.        JsonConfig jsonConfig = 
new
 JsonConfig();
153
.        jsonConfig.registerJsonValueProcessor(java.util.Date.
class
, 
new
 JsonDateValueProcessor());
154
.        
if
(object != 
null
){
155
.            
if
(object 
instanceof
 Collection || object 
instanceof
 Object[]){
156
.                jsonString = JSONArray.fromObject(object, jsonConfig).toString();
157
.            }
else
{
158
.                jsonString = JSONObject.fromObject(object, jsonConfig).toString();
159
.            }
160
.        }
161
.        
return
 jsonString == 
null
 ? 
"{}"
 : jsonString;
162
.    }

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/madun/archive/2010/08/02/5782882.aspx

需要jar包：ezmorph-1.0
.
6
.jar，json-lib-
2.3
.jar

创建java对象：

public
 
class
 Address {
 private
 String road;
 private
 String streate;
 private
 String provience;
 private
 String no;
 public
 String getRoad() {
  return
 road;
 }
 public
 
void
 setRoad(String road) {
  this
.road = road;
 }
 public
 String getStreate() {
  return
 streate;
 }
 public
 
void
 setStreate(String streate) {
  this
.streate = streate;
 }
 public
 String getProvience() {
  return
 provience;
 }
 public
 
void
 setProvience(String provience) {
  this
.provience = provience;
 }
 public
 String getNo() {
  return
 no;
 }
 public
 
void
 setNo(String no) {
  this
.no = no;
 }
}

1
.将json对象转化为java对象

 JSONObject jsonObject = JSONObject.fromObject("{\"no\":\"104\",\"provience\":\"陕西\",\"road\":\"高新路\",\"streate\":\"\"}"
);
  Address Address  = (Address) JSONObject.toBean(jsonObject,Address.class
);
  log.info(Address.getNo());
  log.info(Address.getStreate());
  log.info(Address.getProvience());
  log.info(Address.getRoad());



2
.将java对象转化为json对象

   将java对象转化为json对象：

    Address address = new
 Address();
    address.setNo("104"
);
    address.setProvience("陕西"
);
    address.setRoad("高新路"
);
    address.setStreate(""
);
    JSONArray json = JSONArray.fromObject(address);
    log.info(json.toString());



  将java对象list转化为json对象：

  Address address = new
 Address();
  address.setNo("104"
);
  address.setProvience("陕西"
);
  address.setRoad("高新路"
);
  address.setStreate(""
);
  Address address2 = new
 Address();
  address2.setNo("105"
);
  address2.setProvience("陕西"
);
  address2.setRoad("未央路"
);
  address2.setStreate("张办"
);
  List list = new
 ArrayList();
  list.add(address);
  list.add(address2);
  JSONArray json = JSONArray.fromObject(list);
  log.info(json.toString());

3
.JSONArray转化为list

JSONObject jsonObject = JSONObject.fromObject("{\"no\":\"104\",\"provience\":\"陕西\",\"road\":\"高新路\",\"streate\":\"\"}"
);
  JSONArray jsonArray = new
 JSONArray();
  jsonArray.add("{\"no\":\"104\",\"provience\":\"陕西\",\"road\":\"高新路\",\"streate\":\"\"}"
);
  jsonArray.add("{\"no\":\"104\",\"provience\":\"陕西\",\"road\":\"高新路\",\"streate\":\"123\"}"
);
  Object object = JSONArray.toList(jsonArray,Address.class
);