androidjson伺服器交互
Ⅰ 大牛們,安卓和伺服器使用json交換數據,該怎麼加密
JSONObject json = new JSONObject(); json.put(key,value); . String s = json.toString(); HttpClient client =new DefaultHttpClient(); HttpPost post = new HttpPost(url); HttpEntity entity = new StringEntity(s); post.setEntity(en
Ⅱ Android向伺服器發送json數據,伺服器怎麼把post過去的數據取出來
request取,如果是用了框架,那就直接把注入形參的內容取出來就可以了。
Ⅲ 在android網路編程里,客戶端與伺服器端採用json方式傳遞數據。伺服器端是怎麼接受和返回數據呢
int formDataLength = request.getContentLength();
// 取得ServletInputStream輸入流對象
DataInputStream dataStream = new DataInputStream(
request.getInputStream());
byte body[] = new byte[formDataLength];
int totalBytes = 0;
while (totalBytes < formDataLength) {
int bytes = dataStream.read(body, totalBytes, formDataLength);
totalBytes += bytes;
}
String json = new String(body, "ISO-8859-1");
System.out.println(json);
Ⅳ android客戶端與伺服器發之間的json數據解析
JSONArray jsonArray = new JSONArray(string); //string為返回的字元串
//數據直接為一個數組形式,所以可以直接 用android提供的框架JSONArray讀取JSON數據,轉換成Array
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject item = jsonArray.getJSONObject(i);
//每條記錄又由幾個Object對象組成
iitem.getInt("index");
// 獲取對象對應的值
item.getString("address");
}
Ⅳ android用volley怎麼給伺服器發送json
1.下載官網的android SDK(本人用的是eclipse)
2.新建一個android項目:
File->new->andriod Application project
7、下面就是具體的使用post和get請求的代碼:
A:發送get請求如下:
package com.example.xiaoyuantong;
import java.util.HashMap;
import java.util.Iterator;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.Volley;
/**
* Demo
*/
public class MainActivity extends Activity {
private RequestQueue requestQueue ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
private void init() {
TextView textView = (TextView)findViewById(R.id.textView);
requestQueue = Volley.newRequestQueue(this);
getJson();
textView.setText("hello");
}
private void getJson(){
String url = "http://192.168.20.1:8080/xiaoyuantong/userAction!register.action?pwd='測試'";
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(
Request.Method.GET, url, null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
//這里可以列印出接受到返回的json
Log.e("bbb", response.toString());
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError arg0) {
// System.out.println("sorry,Error");
Log.e("aaa", arg0.toString());
}
});
requestQueue.add(jsonObjectRequest);
}
}
B:發送post請求如下:
package com.example.xiaoyuantong;
import java.util.HashMap;
import java.util.Map;
import org.json.JSONException;
import org.json.JSONObject;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.Volley;
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.widget.TextView;
public class PostActivity extends Activity {
private RequestQueue requestQueue ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_post);
init();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.post, menu);
return true;
}
private void init() {
TextView textView = (TextView)findViewById(R.id.postView);
requestQueue = Volley.newRequestQueue(this);
getJson();
textView.setText("hellopost");
}
private void getJson(){
String url = "http://192.168.20.1:8080/xiaoyuantong/userAction!reg.action";
JsonObjectRequest jsonObjectRequest ;
JSONObject jsonObject=new JSONObject() ;
try {
jsonObject.put("name", "張三");
jsonObject.put("sex", "女");
} catch (JSONException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
//列印前台向後台要提交的post數據
Log.e("post",jsonObject.toString());
//發送post請求
try{
jsonObjectRequest = new JsonObjectRequest(
Request.Method.POST, url, jsonObject,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
//列印請求後獲取的json數據
Log.e("bbb", response.toString());
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError arg0) {
// System.out.println("sorry,Error");
Log.e("aaa", arg0.toString());
}
});
requestQueue.add(jsonObjectRequest);
} catch (Exception e) {
e.printStackTrace();
System.out.println(e + "");
}
requestQueue.start();
}
}
8、在android的logcat裡面能查看到列印的請求
(紅色的顯示的是我在後台請求到數據)
有時候logcat顯示不出數據,可能是消息被過濾了,可以在左邊點擊「減號」刪除過濾
在server端,也就是在myeclipse的建立的另一個後台工程裡面能獲取到請求:
9、後續會補充json數據的解析部分,以及過度到移動雲的部分,上面只是c/s模式下的一個簡單的基於http的請求應答例子。
Ⅵ android寫json格式介面,怎麼保證安全性
一般客戶端與伺服器的交互根據對安全的要求不同,遵循不同的加密級別 1、快速且不安全 http明文交互 2、加密驗證防惡意篡改 在http響應里加入md5驗證 3、防中間人 在http響應里加入伺服器私鑰簽名 4、安全交互 https 每種交互都有自己的應用場景,歡迎補充
Ⅶ android 在伺服器端生成json格式數據,在客戶端怎麼解析
1、生成JSON格式數據,有對應的後台類處理,如果你是做Android開發,後台提供獲取數據的介面
2、客戶端解決:
JSONArrayjsonArr=newJSONArray(json);
for(inti=0;i<jsonArr.length();i++){
JSONObjectjsonObj=jsonArr.getJSONObject(i);
booleanisChild=jsonObj.has("childrenNodes");
AreaBeanbean=newAreaBean(jsonObj.getString("id"),
jsonObj.getString("parentId"),
jsonObj.getString("name"));
mList.add(bean);
if(isChild){
mchildNodesList.add(jsonObj.getString("childrenNodes"));
}else{
mchildNodesList.add(null);
}
}
Ⅷ Android請求php伺服器的JSON問題
因為PHP會默認添加一個bom頭信息 有幾個位元組 你得去掉 一般是四個位元組
package cn.image.sky.util;
import java.io.*;
/**
* Generic unicode textreader, which will use BOM mark to identify the encoding
* to be used. If BOM is not found then use a given default or system encoding.
*/
public class UnicodeReader extends Reader {
PushbackInputStream internalIn;
InputStreamReader internalIn2 = null;
String defaultEnc;
private static final int BOM_SIZE = 4;
/**
*
* @param in
* inputstream to be read
* @param defaultEnc
* default encoding if stream does not have BOM marker. Give NULL
* to use system-level default.
*/
UnicodeReader(InputStream in, String defaultEnc) {
internalIn = new PushbackInputStream(in, BOM_SIZE);
this.defaultEnc = defaultEnc;
}
public String getDefaultEncoding() {
return defaultEnc;
}
/**
* Get stream encoding or NULL if stream is uninitialized. Call init() or
* read() method to initialize it.
*/
public String getEncoding() {
if (internalIn2 == null)
return null;
return internalIn2.getEncoding();
}
/**
* Read-ahead four bytes and check for BOM marks. Extra bytes are unread
* back to the stream, only BOM bytes are skipped.
*/
protected void init() throws IOException {
if (internalIn2 != null)
return;
String encoding;
byte bom[] = new byte[BOM_SIZE];
int n, unread;
n = internalIn.read(bom, 0, bom.length);
if ((bom[0] == (byte) 0x00) && (bom[1] == (byte) 0x00)
&& (bom[2] == (byte) 0xFE) && (bom[3] == (byte) 0xFF)) {
encoding = "UTF-32BE";
unread = n - 4;
} else if ((bom[0] == (byte) 0xFF) && (bom[1] == (byte) 0xFE)
&& (bom[2] == (byte) 0x00) && (bom[3] == (byte) 0x00)) {
encoding = "UTF-32LE";
unread = n - 4;
} else if ((bom[0] == (byte) 0xEF) && (bom[1] == (byte) 0xBB)
&& (bom[2] == (byte) 0xBF)) {
encoding = "UTF-8";
unread = n - 3;
} else if ((bom[0] == (byte) 0xFE) && (bom[1] == (byte) 0xFF)) {
encoding = "UTF-16BE";
unread = n - 2;
} else if ((bom[0] == (byte) 0xFF) && (bom[1] == (byte) 0xFE)) {
encoding = "UTF-16LE";
unread = n - 2;
} else {
// Unicode BOM mark not found, unread all bytes
encoding = defaultEnc;
unread = n;
}
// System.out.println("read=" + n + ", unread=" + unread);
if (unread > 0)
internalIn.unread(bom, (n - unread), unread);
// Use given encoding
if (encoding == null) {
internalIn2 = new InputStreamReader(internalIn);
} else {
internalIn2 = new InputStreamReader(internalIn, encoding);
}
}
public void close() throws IOException {
init();
internalIn2.close();
}
public int read(char[] cbuf, int off, int len) throws IOException {
init();
return internalIn2.read(cbuf, off, len);
}
}
這個類 你看看 可以解決你的問題
Ⅸ android客戶端與伺服器交互,傳的數據是JSON格式,請問用webservice好呢還是http好呢
http比較好,一般公司都用的是http。對應json來說已盡夠了
Ⅹ 伺服器端怎麼接收Android客戶端傳過來的Json數據
android如果是通過http post發送數據的話,可以採用以下方式接收數據:
通過request.getParameter(paraName); 獲取參數。
request對象就是表示請求對象,getParameter就是獲取參數,傳遞的參數就是參數名。
例如請求 localhost:8080/web?data=abcd 則伺服器取值,request.getParameter("data"); 。