JSON与JAVA数据的转换_JAVA_编程开发_程序员俱乐部

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?

class="dp-j">
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"]?????

2、Map?

1. Map map =?new?HashMap();??? ??
2. ????????? map.put(?"name",?"json"?);??? ??
3. ????????? map.put(?"bool", Boolean.TRUE );??? ??
4. ????????? ??
5. ????????? map.put(?"int",?new?Integer(1) );??? ??
6. ????????? map.put(?"arr",?new?String[]{"a","b"} );??? ??
7. ????????? map.put(?"func",?"function(i){ return this.arr[i]; }"?);??? ??
8. ????????? JSONObject json = JSONObject.fromObject( map );??? ??
9. ????????? System.out.println( json );??? ??
10. ?????????//{"func":function(i){ return this.arr[i]; },"arr":["a","b"],"int":1,"name":"json","bool":true}??

3、BEAN?

1. /**
2. ????? * Bean.java
3. ???????? private String name = "json";???
4. ???????? private int pojoId = 1;???
5. ???????? private char[] options = new char[]{'a','f'};???
6. ???????? private String func1 = "function(i){ return this.options[i]; }";???
7. ???????? private JSONFunction func2 = new JSONFunction(new String[]{"i"},"return this.options[i];");
8. ???? */???
9. JSONObject jsonObject = JSONObject.fromObject(?new?JsonBean() );??? ??
10. System.out.println( jsonObject );??? ??
11. //{"func1":function(i){ return this.options[i]; },"pojoId":1,"name":"json","options":["a","f"],"func2":function(i){ return this.options[i]; }}????

4、BEANS?

1. /**
2. ?????? * private int row ;
3. ?????????? private int col ;
4. ?????????? private String value ;
5. ?????? *
6. ?????? */??
7. List list =?new?ArrayList(); ??
8. ????????? JsonBean2 jb1 =?new?JsonBean2(); ??
9. ????????? jb1.setCol(1); ??
10. ????????? jb1.setRow(1); ??
11. ????????? jb1.setValue("xx"); ??
12. ????????? ??
13. ????????? JsonBean2 jb2 =?new?JsonBean2(); ??
14. ????????? jb2.setCol(2); ??
15. ????????? jb2.setRow(2); ??
16. ????????? jb2.setValue(""); ??
17. ????????? ??
18. ????????? ??
19. ????????? list.add(jb1); ??
20. ????????? list.add(jb2); ??
21. ????????? ??
22. ????????? JSONArray ja = JSONArray.fromObject(list); ??
23. ????????? System.out.println( ja.toString() ); ??
24. ?????????//[{"value":"xx","row":1,"col":1},{"value":"","row":2,"col":2}]??

5、String to bean?

1. String json =?"{name=\"json\",bool:true,int:1,double:2.2,func:function(a){ return a; },array:[1,2]}";??? ??
2. JSONObject jsonObject = JSONObject.fromString(json);??? ??
3. Object bean = JSONObject.toBean( jsonObject );??? ??
4. assertEquals( jsonObject.get(?"name"?), PropertyUtils.getProperty( bean,?"name"?) );??? ??
5. ?? assertEquals( jsonObject.get(?"bool"?), PropertyUtils.getProperty( bean,?"bool"?) );??? ??
6. ?? assertEquals( jsonObject.get(?"int"?), PropertyUtils.getProperty( bean,?"int"?) );??? ??
7. ??? assertEquals( jsonObject.get(?"double"?), PropertyUtils.getProperty( bean,?"double"?) );??? ??
8. ??? assertEquals( jsonObject.get(?"func"?), PropertyUtils.getProperty( bean,?"func"?) );??? ??
9. ?? List expected = JSONArray.toList( jsonObject.getJSONArray(?"array"?) );??? ??
10. ?? assertEquals( expected, (List) PropertyUtils.getProperty( bean,?"array"?) );????

1. String json =?"{\"value\":\"xx\",\"row\":1,\"col\":1}";??? ??
2. JSONObject jsonObject = JSONObject.fromString(json); ??
3. ?? JsonBean2 bean = (JsonBean2) JSONObject.toBean( jsonObject, JsonBean2.class?);??? ??
4. ??? assertEquals( jsonObject.get(?"col"?),new?Integer( bean.getCol())?? );??? ??
5. ????? assertEquals( jsonObject.get(?"row"?),?new?Integer( bean.getRow() ) );??? ??
6. ????? assertEquals( jsonObject.get(?"value"?), bean.getValue() );????

6 json to xml?
1)?
JSONObject json = new JSONObject( true );?
String xml = XMLSerializer.write( json );?

<o class="object" null="true">?

2)?
JSONObject json = JSONObject.fromObject("{\"name\":\"json\",\"bool\":true,\"int\":1}");?
String xml = XMLSerializer.write( json );?
<o class="object">?
<name type="string">json</name>?
<bool type="boolean">true</bool>?
<int type="number">1</int>?
</o>?
<o class="object">?
<name type="string">json</name>?
<bool type="boolean">true</bool>?
<int type="number">1</int>?
</o>?
3)?
JSONArray json = JSONArray.fromObject("[1,2,3]");?
String xml = XMLSerializer.write( json );?
<a class="array">?
<e type="number">1</e>?
<e type="number">2</e>?
<e type="number">3</e>?
</a>?

7 、xml to json?
<a class="array">?
<e type="function" params="i,j">?
return matrix[i][j];?
</e>?
</a>?
<a class="array">?
<e type="function" params="i,j">?
return matrix[i][j];?
</e>?
</a>?

JSONArray json = (JSONArray) XMLSerializer.read( xml );?
System.out.println( json );?
// prints [function(i,j){ return matrix[i][j]; }]

出自http://falchion.javaeye.com/