JSON与JAVA的数据转换
JSON-lib这个Java类包用于把bean,map和XML转换成JSON并能够把JSON转回成bean和DynaBean。
下载地址: http://json-lib.sourceforge.net/
还要需要的第3方包:
org.apache.commons(3.2以上版本)
org.apache.oro
net.sf.ezmorph(ezmorph-1.0.4.jar)
nu.xom
1、List
2、Map
3、BEAN
53.
62.
4、BEANS
63.
81.
82.
5、String to bean
6 json to xml
1)
引自： http://developer.51cto.com/art/200906/129090.htm
下载地址: http://json-lib.sourceforge.net/
还要需要的第3方包:
org.apache.commons(3.2以上版本)
org.apache.oro
net.sf.ezmorph(ezmorph-1.0.4.jar)
nu.xom
1、List
1. boolean[] boolArray = new boolean[]{true,false,true};
2. JSONArray jsonArray1 = JSONArray.fromObject( boolArray );
3. System.out.println( jsonArray1 );
4. // prints [true,false,true]
5.
6. List list = new ArrayList();
7. list.add( "first" );
8. list.add( "second" );
9. JSONArray jsonArray2 = JSONArray.fromObject( list );
10. System.out.println( jsonArray2 );
11. / prints ["first","second"]
12.
13. JSONArray jsonArray3 = JSONArray.fromObject( "['json','is','easy']" );
14. System.out.println( jsonArray3 );
15. // prints ["json","is","easy"]
16.
17. boolean[] boolArray = new boolean[]{true,false,true};
18. JSONArray jsonArray1 = JSONArray.fromObject( boolArray );
19. System.out.println( jsonArray1 );
20. // prints [true,false,true]
21.
22. List list = new ArrayList();
23. list.add( "first" );
24. list.add( "second" );
25. JSONArray jsonArray2 = JSONArray.fromObject( list );
26. System.out.println( jsonArray2 );
27. // prints ["first","second"]
28.
29. JSONArray jsonArray3 = JSONArray.fromObject( "['json','is','easy']" );
30. System.out.println( jsonArray3 );
31. // prints ["json","is","easy"]
2、Map
32. Map map = new HashMap();
33. map.put( "name", "json" );
34. map.put( "bool", Boolean.TRUE );
35.
36. map.put( "int", new Integer(1) );
37. map.put( "arr", new String[]{"a","b"} );
38. map.put( "func", "function(i){ return this.arr[i]; }" );
39. JSONObject json = JSONObject.fromObject( map );
40. System.out.println( json );
41. //{"func":function(i){ return this.arr[i]; },"arr":["a","b"],"int":1,"name":"json","bool":true}
42.
43. Map map = new HashMap();
44. map.put( "name", "json" );
45. map.put( "bool", Boolean.TRUE );
46.
47. map.put( "int", new Integer(1) );
48. map.put( "arr", new String[]{"a","b"} );
49. map.put( "func", "function(i){ return this.arr[i]; }" );
50. JSONObject json = JSONObject.fromObject( map );
51. System.out.println( json );
52. //{"func":function(i){ return this.arr[i]; },"arr":["a","b"],"int":1,"name":"json","bool":true}
3、BEAN
53.
54. JSONObject jsonObject = JSONObject.fromObject( new JsonBean() );
55. System.out.println( jsonObject );
56. //{"func1":function(i){ return this.options[i]; },"pojoId":1,"name":"json","options":["a","f"],"func2":function(i){ return this.options[i]; }}
57.
58.
59. JSONObject jsonObject = JSONObject.fromObject( new JsonBean() );
60. System.out.println( jsonObject );
61. //{"func1":function(i){ return this.options[i]; },"pojoId":1,"name":"json","options":["a","f"],"func2":function(i){ return this.options[i]; }}
62.
4、BEANS
63.
64. List list = new ArrayList();
65. JsonBean2 jb1 = new JsonBean2();
66. jb1.setCol(1);
67. jb1.setRow(1);
68. jb1.setValue("xx");
69.
70. JsonBean2 jb2 = new JsonBean2();
71. jb2.setCol(2);
72. jb2.setRow(2);
73. jb2.setValue("");
74.
75. list.add(jb1);
76. list.add(jb2);
77.
78. JSONArray ja = JSONArray.fromObject(list);
79. System.out.println( ja.toString() );
80. //[{"value":"xx","row":1,"col":1},{"value":"","row":2,"col":2}]
81.
82.
83. List list = new ArrayList();
84. JsonBean2 jb1 = new JsonBean2();
85. jb1.setCol(1);
86. jb1.setRow(1);
87. jb1.setValue("xx");
88.
89. JsonBean2 jb2 = new JsonBean2();
90. jb2.setCol(2);
91. jb2.setRow(2);
92. jb2.setValue("");
93.
94.
95. list.add(jb1);
96. list.add(jb2);
97.
98. JSONArray ja = JSONArray.fromObject(list);
99. System.out.println( ja.toString() );
100. //[{"value":"xx","row":1,"col":1},{"value":"","row":2,"col":2}]
5、String to bean
101. String json = "{name=\"json\",bool:true,int:1,double:2.2,func:function(a){ return a; },array:[1,2]}";
102. JSONObject jsonObject = JSONObject.fromString(json);
103. Object bean = JSONObject.toBean( jsonObject );
104. assertEquals( jsonObject.get( "name" ), PropertyUtils.getProperty( bean, "name" ) );
105. assertEquals( jsonObject.get( "bool" ), PropertyUtils.getProperty( bean, "bool" ) );
106. assertEquals( jsonObject.get( "int" ), PropertyUtils.getProperty( bean, "int" ) );
107. assertEquals( jsonObject.get( "double" ), PropertyUtils.getProperty( bean, "double" ) );
108. assertEquals( jsonObject.get( "func" ), PropertyUtils.getProperty( bean, "func" ) );
109. List expected = JSONArray.toList( jsonObject.getJSONArray( "array" ) );
110. assertEquals( expected, (List) PropertyUtils.getProperty( bean, "array" ) );
111.
112. String json = "{name=\"json\",bool:true,int:1,double:2.2,func:function(a){ return a; },array:[1,2]}";
113. JSONObject jsonObject = JSONObject.fromString(json);
114. Object bean = JSONObject.toBean( jsonObject );
115. assertEquals( jsonObject.get( "name" ), PropertyUtils.getProperty( bean, "name" ) );
116. assertEquals( jsonObject.get( "bool" ), PropertyUtils.getProperty( bean, "bool" ) );
117. assertEquals( jsonObject.get( "int" ), PropertyUtils.getProperty( bean, "int" ) );
118. assertEquals( jsonObject.get( "double" ), PropertyUtils.getProperty( bean, "double" ) );
119. assertEquals( jsonObject.get( "func" ), PropertyUtils.getProperty( bean, "func" ) );
120. List expected = JSONArray.toList( jsonObject.getJSONArray( "array" ) );
121. assertEquals( expected, (List) PropertyUtils.getProperty( bean, "array" ) );
122.
123. String json = "{\"value\":\"xx\",\"row\":1,\"col\":1}";
124. JSONObject jsonObject = JSONObject.fromString(json);
125. JsonBean2 bean = (JsonBean2) JSONObject.toBean( jsonObject, JsonBean2.class );
126. assertEquals( jsonObject.get( "col" ),new Integer( bean.getCol()) );
127. assertEquals( jsonObject.get( "row" ), new Integer( bean.getRow() ) );
128. assertEquals( jsonObject.get( "value" ), bean.getValue() );
129.
130. String json = "{\"value\":\"xx\",\"row\":1,\"col\":1}";
131. JSONObject jsonObject = JSONObject.fromString(json);
132. JsonBean2 bean = (JsonBean2) JSONObject.toBean( jsonObject, JsonBean2.class );
133. assertEquals( jsonObject.get( "col" ),new Integer( bean.getCol()) );
134. assertEquals( jsonObject.get( "row" ), new Integer( bean.getRow() ) );
135. assertEquals( jsonObject.get( "value" ), bean.getValue() );
6 json to xml
1)
136. JSONObject json = new JSONObject( true );
137. String xml = XMLSerializer.write( json );
138. < o class="object" null="true">
2)
139. JSONObject json = JSONObject.fromObject("{\"name\":\"json\",\"bool\":true,\"int\":1}");
140. String xml = XMLSerializer.write( json );
141. < o class="object">
142. < name type="string">json< /name>
143. < bool type="boolean">true< /bool>
144. < int type="number">1< /int>
145. < /o>
146. < o class="object">
147. < name type="string">json< /name>
148. < bool type="boolean">true< /bool>
149. < int type="number">1< /int>
150. < /o>
3)
151. JSONArray json = JSONArray.fromObject("[1,2,3]");
152. String xml = XMLSerializer.write( json );
153. < a class="array">
154. < e type="number">1< /e>
155. < e type="number">2< /e>
156. < e type="number">3< /e>
157. < /a>
7 、xml to json
158. < a class="array">
159. < e type="function" params="i,j">
160. return matrix[i][j];
161. < /e>
162. < /a>
163. < a class="array">
164. < e type="function" params="i,j">
165. return matrix[i][j];
166. < /e>
167. < /a>
168. JSONArray json = (JSONArray) XMLSerializer.read( xml );
169. System.out.println( json );
170. // prints [function(i,j){ return matrix[i][j]; }]
引自： http://developer.51cto.com/art/200906/129090.htm