get方式提交的數據是直接拼接在url的末尾
final String path = "http://192.168.1.103/Web/servlet/CheckLogin?name=" + name + "&pass=" + pass;
發送get請求,代碼和之前一樣
URL url = new URL(path);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setReadTimeout(5000);
conn.setConnectTimeout(5000);
if(conn.getResponseCode() == 200){
}
瀏覽器在發送請求攜帶數據時會對數據進行URL編碼,我們寫代碼時也需要爲中文進行URL編碼
URLEncoder.encode(name),過時了,編碼是utf-8,這個比較方便,
URLEncoder.encode(name, “utf-8”),這個是不過時的,如果編碼不是utf-8需要使用這個。
String path = "http://192.168.1.103/Web/servlet/CheckLogin?name=" + URLEncoder.encode(name) + "&pass=" + pass;
核心代碼
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
Handler handler = new Handler(){
public void handleMessage(android.os.Message msg) {
Toast.makeText(MainActivity.this, (String)msg.obj, 0).show();
}
};
public void click(View v){
EditText et_name = (EditText) findViewById(R.id.et_name);
EditText et_pass = (EditText) findViewById(R.id.et_pass);
final String name = et_name.getText().toString();
final String pass = et_pass.getText().toString();
Thread t = new Thread(){
@Override
public void run() {
//提交的數據需要經過url編碼,英文和數字編碼後不變
@SuppressWarnings("deprecation")
String path = "http://192.168.13.13/Web2/servlet/LoginServlet?name=" + URLEncoder.encode(name) + "&pass=" + pass;
try {
URL url = new URL(path);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setConnectTimeout(5000);
conn.setReadTimeout(5000);
if(conn.getResponseCode() == 200){
InputStream is =conn.getInputStream();
String text = Utils.getTextFromStream(is);
Message msg = handler.obtainMessage();
msg.obj = text;
handler.sendMessage(msg);
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
};
t.start();
}
}
getTextFromStream
public static String getTextFromStream(InputStream is){
byte[] b = new byte[1024];
int len = 0;
//創建字節數組輸出流,讀取輸入流的文本數據時,同步把數據寫入數組輸出流
ByteArrayOutputStream bos = new ByteArrayOutputStream( );
try {
while((len = is.read(b)) != -1){
bos.write(b, 0, len);
}
//把字節數組輸出流裏的數據轉換成字節數組
String text = new String(bos.toByteArray( ));
return text;
} catch (IOException e) {
e.printStackTrace();
}
return null;
}