java - 从给定的 Map 到 json 字符串(或 JSONObject)

Question

在 Java 中，我通过邮寄方式传递了这些键/值对(例如):

form_id=undefined

frmb[0][cssClass]=input_text

frmb[0][required]=checked

frmb[0][values]=First Name

frmb[1][cssClass]=input_text

frmb[1][required]=checked

frmb[1][values]=Last Name

frmb[2][cssClass]=textarea

frmb[2][required]=undefined

frmb[2][values]=Bio

frmb[3][cssClass]=checkbox

frmb[3][required]=undefined

frmb[3][title]=What's on your pizza?

frmb[3][values][2][baseline]=undefined

frmb[3][values][2][value]=Extra Cheese

frmb[3][values][3][baselise]=undefined

frmb[3][values][3][value]=Pepperoni

frmb[3][values][4][baseline]=undefined

frmb[3][values][4][value]=Beef

frmb[4][cssClass]=radio

frmb[4][required]=undefined

frmb[4][title]=Do you like pizza?

frmb[4][values][2][baseline]=checked

frmb[4][values][2][value]=Yes

frmb[4][values][3][baseline]=undefined

frmb[4][values][3][value]=No

frmb[5][cssClass]=select

frmb[5][multiple]=checked

frmb[5][required]=checked

frmb[5][title]=Select a pizza type:

frmb[5][values][2][baseline]=checked

frmb[5][values][2][value]=Margherita

frmb[5][values][3][baseline]=undefined

frmb[5][values][3][value]=Napoli

frmb[5][values][4][baseline]=undefined

frmb[5][values][4][value]=Marinara

我必须创建以下 json:

[{"cssClass":"input_text","required":"checked","values":"First Name"},{"cssClass":"input_text","required":"checked","values":"Last Name"},{"cssClass":"textarea","required":"undefined","values":"Bio"},{"cssClass":"checkbox","required":"undefined","title":"What's on your pizza?","values":{"2":{"value":"Extra Cheese","baseline":"undefined"},"3":{"value":"Pepperoni","baseline":"undefined"},"4":{"value":"Beef","baseline":"undefined"}}},{"cssClass":"radio","required":"undefined","title":"Do you like pizza?","values":{"2":{"value":"Yes","baseline":"checked"},"3":{"value":"No","baseline":"undefined"}}},{"cssClass":"select","required":"checked","multiple":"checked","title":"Select a pizza type:","values":{"2":{"value":"Margherita","baseline":"checked"},"3":{"value":"Napoli","baseline":"undefined"},"4":{"value":"Marinara","baseline":"undefined"}}}]

我该怎么办？

我没有成功地解析键，对属于同一 JSONObject 的元素进行分组。

Answer 1

您可以使用Gson为此的图书馆。它不支持嵌套映射的序列化(我假设您的输出代表嵌套映射)。您可以按照 this thread 中的说明编写自定义序列化器/反序列化器或创建您自己的序列化方法。