Android向服务器端发送json数据

Android向服务器端发送json数据

android 向服务器端发送json数据，本文讲解的知识点比较基础，如果你是大神，请直接关闭该网页，免得浪费你宝贵时间。

1.向服务器端发送json数据

关键代码：

view
sourceprint?

01.

public

void

sendJsonToServer()
{

02.

HttpClient
httpClient =

new

DefaultHttpClient();

03.

try

{

04.

05.

HttpPost
httpPost =

new

HttpPost(constant.url);

06.

HttpParams
httpParams =

new

BasicHttpParams();

07.

List<NameValuePair>
nameValuePair =

new

ArrayList<NameValuePair>();

08.

Gson
gson =

new

Gson();

09.

String
str = gson.toJson(initData());

10.

nameValuePair.add(

new

BasicNameValuePair(

"jsonString"

,
URLEncoder

11.

.encode(str,

"utf-8"

)));

12.

httpPost.setEntity(

new

UrlEncodedFormEntity(nameValuePair));

13.

httpPost.setParams(httpParams);

14.

Toast.makeText(Main.

this

,

"发送的数据：\n"

+
str.toString(),

15.

Toast.LENGTH_SHORT).show();

16.

httpClient.execute(httpPost);

17.

HttpResponse
response = httpClient.execute(httpPost);

18.

StatusLine
statusLine = response.getStatusLine();

19.

if

(statusLine
!=

null

&&
statusLine.getStatusCode() ==

200

)
{

20.

HttpEntity
entity = response.getEntity();

21.

if

(entity
!=

null

)
{

22.

Toast.makeText(

23.

Main.

this

,

24.

"服务器处理返回结果："

+
readInputStream(entity.getContent()),

25.

Toast.LENGTH_SHORT).show();

26.

}

else

{

27.

Toast.makeText(Main.

this

,

"没有返回相关数据"

,
Toast.LENGTH_SHORT)

28.

.show();

29.

}

30.

}

else

{

31.

Toast.makeText(Main.

this

,

"发送失败，可能服务器忙，请稍后再试"

,

32.

Toast.LENGTH_SHORT).show();

33.

}

34.

}

catch

(Exception
e) {

35.

throw

new

RuntimeException(e);

36.

}

37.

}

38.

39.

private

static

String
readInputStream(InputStream is)

throws

IOException
{

40.

if

(is
==

null

)

41.

return

null

;

42.

ByteArrayOutputStream
bout =

new

ByteArrayOutputStream();

43.

int

len
=

0

;

44.

byte

[]
buf =

new

byte

[

1024

];

45.

while

((len
=is.read(buf)) != -

1

)
{

46.

bout.write(buf,

0

,
len);

47.

}

48.

is.close();

49.

return

URLDecoder.decode(

new

String(bout.toByteArray()),

"utf-8"

);

50.

}

51.

/*

52.

*
填充数据源

53.

*/

54.

public

List<Product>
initData() {

55.

List<Product>
persons =

new

ArrayList<Product>();

56.

for

(

int

i
=

0

;
i <

5

;
i++) {

57.

Product
p =

new

Product();

58.

p.setLocation(

"所在位置"

);

59.

p.setName(

"名称"

+
i);

60.

persons.add(p);

61.

}

62.

return

persons;

63.

}

2.服务器端接收json数据后返回处理结果

3.利用Gson将集合转换成json形式

如果你还没有听过gson 或是对其不是很熟悉，请先参考Android解析json数据（Gson)，或是百度
谷歌之。

4.服务器端采用VS建立一个网站，新建一个页面androidtest.aspx

源码：

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sourceprint?

01.

protected

void

Page_Load(object
sender,EventArgs e)

02.

{

03.

if

(Request[

"jsonString"

]
!=

null

)

04.

{

05.

string
json = Request[

"jsonString"

].ToString().Trim();

06.

json
= HttpUtility.UrlDecode(json);

07.

try

08.

{

09.

string
str = json.Substring(

0

,
json.Length -

1

);

//去掉最后一个]

10.

str
= str.Substring(

1

);

//去掉第一个[

11.

string[]
sArray = Regex.Split(str,

"},"

);

12.

JavaScriptSerializer
jss =

new

JavaScriptSerializer();

13.

for

(

int

i
=

0

;
i <sArray.Length; i++)

14.

{

15.

if

(i
< sArray.Length -

1

)

16.

{

17.

sArray[i]
+=

"}"

;

18.

}

19.

ProductBillList
list = jss.Deserialize<ProductBillList>(sArray[i]);

20.

Response.Write(list.location
+ list.name +

"\n"

);

21.

}

22.

}

23.

catch

24.

{

25.

Response.Write(

"出现异常"

);

26.

}

27.

}

28.

else

29.

{

30.

Response.Write(

"接收数据失败"

);

31.

}

32.

}

33.

public

class

ProductBill

34.

{

35.

public

List<ProductBillList>
ProductBillLists { get; set; }

36.

}

37.

38.

public

class

ProductBillList

39.

{

40.

public

String
name { get; set; }

41.

public

String
location { get; set; }

42.

}

43.

效果：