json-lib包笔记
json-lib.jar开发包使用:
依赖包:
commons-beanutils.jar;
commons-httpclient.jar;
commons-lang.jar;
ezmorph.jar;不少人使用时会提示net.sf.ezmorph.xxx找不到,就是缺这个:
morph-1.0.1.jar
相关链接:
http://json-lib.sourceforge.net/
http://ezmorph.sourceforge.net/
http://morph.sourceforge.net/
使用过程中问题:
1,把bean转化为json格式时老提示如下错误:
Exception in thread "main" net.sf.json.JSONException: java.lang.NoSuchMethodException: Property 'name' has no getter method
解决:声明bean为public class xxx,必须是public,我用默认类型(class xxx)都不行
2,Exception in thread "main" java.lang.NoSuchMethodError: org.apache.commons.lang.ArrayUtils.toObject([C)[Ljava/lang/Character;
原因:定义属性如下:private char[] options = new char[] { 'a', 'f' };好像不能处理这种类型的
3, private String func1 = "function(i){ return this.options[i]; }";
和
private JSONFunction func2 = new JSONFunction(new String[] { "i" },
"return this.options[i];");
转换后显示结果差不多:
{"func1":function(i){ return this.options[i];,"func2":function(i){ return this.options[i]; }}
测试类:
1.import java.util.ArrayList;
2.import java.util.HashMap;
3.import java.util.List;
4.import java.util.Map;
5.
6.import net.sf.json.JSONArray;
7.import net.sf.json.JSONObject;
8.
9.public class Json {
10. public static void main(String[] args) {
11. Json j = new Json();
12. j.bean2json();
13. }
14.
15. public void arr2json() {
16. boolean[] boolArray = new boolean[] { true, false, true };
17. JSONArray jsonArray = JSONArray.fromObject(boolArray);
18. System.out.println(jsonArray);
19. // prints [true,false,true]
20. }
21.
22. public void list2json() {
23. List list = new ArrayList();
24. list.add("first");
25. list.add("second");
26. JSONArray jsonArray = JSONArray.fromObject(list);
27. System.out.println(jsonArray);
28. // prints ["first","second"]
29. }
30.
31. public void createJson() {
32. JSONArray jsonArray = JSONArray.fromObject("['json','is','easy']");
33. System.out.println(jsonArray);
34. // prints ["json","is","easy"]
35. }
36.
37. public void map2json() {
38. Map
39. map.put("name", "json");
40. map.put("bool", Boolean.TRUE);
41. map.put("int", new Integer(1));
42.