fastjson使用实例

转自：http://www.52php.cn/article/p-vcsszekb-yo.html

1. packagejunit.test;
3. importjava.util.ArrayList;
4. importjava.util.HashMap;
5. importjava.util.List;
6. importjava.util.Map;
8. importcom.alibaba.fastjson.JSON;
9. importcom.alibaba.fastjson.TypeReference;
10. /*
11. *这里将json的转化和解析都放在一起了，大家可以根据实际需要来转化json字符串和解析json字符串
12. */
13. publicclassTestFastJson{
14. staticclassPerson{
15. privateStringid;
16. privateStringname;
17. privateintage;
18. publicPerson(){
19. }
20. publicPerson(Stringid,Stringname,intage){
21. this.id=id;
22. this.name=name;
23. this.age=age;
24. }
25. publicStringgetId(){
26. returnid;
27. voidsetId(Stringid){
28. publicStringgetName(){
29. returnname;
30. voidsetName(Stringname){
31. this.name=name;
32. intgetAge(){
33. returnage;
34. voidsetAge( @Override
35. publicStringtoString(){
36. return"Person[age="+age+",id="+id+",name="+name+"]";
37. voidmain(String[]args){
38. method1();
39. method2();
40. method3();
41. method4();
42. voidmethod1(){
43. System.out.println("javabean转化示例开始----------");
44. Personperson=newPerson("1","fastjson",1);
45. //这里将javabean转化成json字符串
46. StringjsonString=JSON.toJSONString(person);
47. System.out.println(jsonString);
48. //这里将json字符串转化成javabean对象,
49. person=JSON.parSEObject(jsonString,Person.class);
50. System.out.println(person.toString());
51. System.out.println("javabean转化示例结束----------");
52. voidmethod2(){
53. System.out.println("List<javabean>转化示例开始----------");
54. Personperson1="fastjson1",0); background-color:inherit">1);
55. Personperson2=newPerson("2","fastjson2",0); background-color:inherit">2);
56. List<Person>persons=newArrayList<Person>();
57. persons.add(person1);
58. persons.add(person2);
59. StringjsonString=JSON.toJSONString(persons);
60. System.out.println("json字符串:"+jsonString);
61. //解析json字符串
62. List<Person>persons2=JSON.parseArray(jsonString,0); background-color:inherit">//输出解析后的person对象，也可以通过调试模式查看persons2的结构
63. System.out.println("person1对象："+persons2.get(0).toString());
64. System.out.println("person2对象："+persons2.get(1).toString());
65. System.out.println("List<javabean>转化示例结束----------");
66. voidmethod3(){
67. System.out.println("List<String>转化示例开始----------");
68. List<String>list=newArrayList<String>();
69. list.add("fastjson1");
70. list.add("fastjson2");
71. list.add("fastjson3");
72. StringjsonString=JSON.toJSONString(list);
73. List<String>list2=JSON.parSEObject(jsonString,newTypeReference<List<String>>(){});
74. System.out.println(list2.get(0)+"::"+list2.get(1)+"::"+list2.get(2));
75. System.out.println("List<String>转化示例结束----------");
76. voidmethod4(){
77. System.out.println("List<Map<String,Object>>转化示例开始----------");
78. Map<String,Object>map=newHashMap<String,Object>();
79. map.put("key1","value1");
80. map.put("key2","value2");
81. Map<String,Object>map2= map2.put("key1",108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> map2.put("key2",0); background-color:inherit">2);
82. List<Map<String,Object>>list=newArrayList<Map<String,Object>>();
83. list.add(map);
84. list.add(map2);
85. StringjsonString=JSON.toJSONString(list);
86. System.out.println("json字符串:"+jsonString);
87. newTypeReference<List<Map<String,Object>>>(){});
88. System.out.println("map的key1值"+list2.get(0).get("key1"));
89. System.out.println("map的key2值"+list2.get(0).get("key2"));
90. System.out.println("ma2p的key1值"+list2.get(1).get("key1"));
91. System.out.println("map2的key2值"+list2.get(1).get("key2"));
92. }

（编辑：李大同）

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