fastJson在java后台转换json格式数据探究二--处理数组/List/Map

直接给代码：

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1. packagefastJson.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.JSONArray;
10. publicclassFastJsonTest1
11. {
12. /**
13. *数组转json格式字符串
14. */
15. voidarray2Json(){
16. String[]arr={"bill","green","maks","jim"};
17. StringjsonText=JSON.toJSONString(arr,true);
18. System.out.println("array2Json()方法：jsonText=="+jsonText);
19. //输出结果：jsonText==["bill","green","maks","jim"]
20. }
21. *json格式字符串转数组
22. voidjson2Array(){
23. StringjsonText="[\"bill\",\"green\",\"maks\",\"jim\"]";
24. JSONArrayjsonArr=JSON.parseArray(jsonText);
25. System.out.println("json2Array()方法：jsonArr=="+jsonArr);
26. //输出结果：jsonArr==["bill",153); font-weight:bold; background-color:inherit">voidarray2Json2(){
27. Useruser1=newUser("P001","TOM",16);
28. Useruser2=newUser("P002","JACKSON",0); background-color:inherit">21);
29. Useruser3=newUser("P003","MARTIN",0); background-color:inherit">20);
30. User[]userArr={user1,user2,user3};
31. StringjsonText=JSON.toJSONString(userArr,153); font-weight:bold; background-color:inherit">true);
32. System.out.println("array2Json2()方法：jsonText=="+jsonText);
33. //输出结果：jsonText==[{"age":16,"id":"P001","name":"TOM"},{"age":21,"id":"P002","name":"JACKSON"},{"age":20,"id":"P003","name":"MARTIN"}]
34. }
35. /**
36. *json格式字符串转数组
37. */
38. voidjson2Array2(){
39. StringjsonText="[{\"age\":16,\"id\":\"P001\",\"name\":\"TOM\"},{\"age\":21,\"id\":\"P002\",\"name\":\"JACKSON\"},{\"age\":20,\"id\":\"P003\",\"name\":\"MARTIN\"}]";
40. JSONArrayjsonArr=JSON.parseArray(jsonText);
41. System.out.println("json2Array2()方法：jsonArr=="+jsonArr);
42. //输出结果：jsonArr==[{"age":16,0); background-color:inherit">*list集合转json格式字符串
43. voidlist2Json(){
44. Listlist=newArrayList();
45. newUser("L001",108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> list.add(user1);
46. Useruser2=newUser("L002",0); background-color:inherit">21);
47. list.add(user2);
48. newUser("L003",108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> list.add(user3);
49. StringjsonText=JSON.toJSONString(list,108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> System.out.println("list2Json()方法：jsonText=="+jsonText);
50. voidlist2Json2(){
51. Addressaddress1=newAddress("广东省","深圳市","科苑南路","580053");
52. Useruser1=16,address1);
53. list.add(user1);
54. Addressaddress2=newAddress("江西省","南昌市","阳明路","330004");
55. 21,address2);
56. Addressaddress3=newAddress("陕西省","西安市","长安南路","710114");
57. Useruser3=20,address3);
58. list.add(user3);
59. StringjsonText=JSON.toJSONString(list,248)"> System.out.println("list2Json2()方法：jsonText=="+jsonText);
60. //输出结果：jsonText==[{"address":{"city":"深圳市","post":"580053","province":"广东省","street":"科苑南路"},"age":16,{"address":{"city":"南昌市","post":"330004","province":"江西省","street":"阳明路"},"age":21,{"address":{"city":"西安市","post":"710114","province":"陕西省","street":"长安南路"},"age":20,"name":"MARTIN"}]
61. *map转json格式字符串
62. voidmap2Json(){
63. Mapmap=newHashMap();
64. Addressaddress1="580053");
65. map.put("address1",address1);
66. map.put("address2",108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> Addressaddress3="710114");
67. map.put("address3",address3);
68. StringjsonText=JSON.toJSONString(map,248)"> System.out.println("map2Json()方法：jsonText=="+jsonText);
69. //输出结果：jsonText=={"address1":{"city":"深圳市","address2":{"city":"南昌市","address3":{"city":"西安市","street":"长安南路"}}
70. staticvoidmain(String[]args)
71. {
72. FastJsonTest1test=newFastJsonTest1();
73. //数组转json格式字符串
74. test.array2Json();
75. //json格式字符串转数组
76. test.json2Array();
77. test.array2Json2();
78. test.json2Array2();
79. //list集合转json格式字符串
80. test.list2Json();
81. //list集合转json格式字符串
82. test.list2Json2();
83. //map转json格式字符串
84. test.map2Json();
85. }

控制台输出结果：

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