使用httpclient提交数据

apache httpClient 轻量级的浏览器：

使用GET方式数据步骤：

1、创建一个浏览器：

2、输入一个网址：

3、敲回车

模块代码：

package com.itheima.qqlogin;

import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import com.itheima.htmlview.utils.StreamTools;

import android.app.Activity;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {

private EditText et_name;

private EditText et_pwd;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

et_name = (EditText) findViewById(R.id.et_name);

et_pwd = (EditText) findViewById(R.id.et_pwd);

}

public void login(View view){
final String name = et_qq.getText().toString().trim();

final String pwd = et_pwd.getText().toString().trim();

if(TextUtils.isEmpty(name) || TextUtils.isEmpty(pwd)){
Toast.makeText(this, "qq和密码不能空", 0).show();
return;
}else{
new Thread(){

public void run() {

try {
String path = "http://192.168.22.136:8080/web/servlet/LoginServlet?username="+URLEncoder.encode(name,"UTF-8")+"&password="+URLEncoder.encode(pwd,"UTF-8");

//

// 1、创建一个浏览器：

HttpClient client = new DefaultHttpClient();

// 2、输入一个网址：

HttpGet httpGet = new HttpGet(path);

//

// 3、敲回车

HttpResponse response = client.execute(httpGet);

//获取服务器端返回的响应码（状态码）

int code = response.getStatusLine().getStatusCode();

// int code = conn.getResponseCode();

if(code == 200){

// （2）解析服务器返回的二进制数据，解析成一个字符串

// InputStream is = conn.getInputStream();

//获取服务器返回的二进制数据流

InputStream is = response.getEntity().getContent();

String result = StreamTools.readStream(is);
System.out.println("---------"+ result);
}

} catch (Exception e) {
e.printStackTrace();
}
};
}.start();
}
}

}

使用post方式向服务器端提交数据

1、创建一个浏览器：

2、输入一个网址：

3、敲回车

模版代码：

package com.itheima.qqlogin;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.URL;

import java.net.URLEncoder;

import java.util.ArrayList;

import java.util.List;

import org.apache.http.HttpResponse;

import org.apache.http.client.HttpClient;

import org.apache.http.client.entity.UrlEncodedFormEntity;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.message.BasicNameValuePair;

import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.text.TextUtils;

import android.view.View;

import android.widget.EditText;

import android.widget.Toast;

import com.itheima.htmlview.utils.StreamTools;

public class MainActivity extends Activity {

private EditText et_qq;

private EditText et_pwd;

private Handler handler = new Handler(){
public void handleMessage(android.os.Message msg) {

String result = (String) msg.obj;

Toast.makeText(MainActivity.this, result, 0).show();
};
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

et_qq = (EditText) findViewById(R.id.et_qq);

et_pwd = (EditText) findViewById(R.id.et_pwd);

}

public void login(View view){
final String name = et_qq.getText().toString().trim();

final String pwd = et_pwd.getText().toString().trim();

if(TextUtils.isEmpty(name) || TextUtils.isEmpty(pwd)){
Toast.makeText(this, "qq和密码不能空", 0).show();
return;
}else{
new Thread(){

public void run() {

try {
String path = "http://192.168.22.136:8080/web/servlet/LoginServlet";

// String data = “username=”+name+”&password=”+pwd;

String data = "username="+URLEncoder.encode(name,"UTF-8")+"&password="+URLEncoder.encode(pwd,"UTF-8");

// 1、创建一个浏览器：

HttpClient client = new DefaultHttpClient();

// 2、输入一个网址：

HttpPost httpPost = new HttpPost(path);

List<BasicNameValuePair> parameters = new ArrayList<BasicNameValuePair>();

BasicNameValuePair p1 = new BasicNameValuePair("username", name);

BasicNameValuePair p2 = new BasicNameValuePair("password", pwd);
parameters.add(p1);
parameters.add(p2);
//默认使用iso-8859-1编码，需要指定UTF-8
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(parameters,"UTF-8");

//

// 3、敲回车

//设置提交的数据

httpPost.setEntity(entity);

HttpResponse response = client.execute(httpPost);

// 2、服务器返回数据

// （1）判断状态码：200 ok，404 没有找到资源、503、509 服务器端错误

int code = response.getStatusLine().getStatusCode();

// int code = conn.getResponseCode();

if(code == 200){

// （2）解析服务器返回的二进制数据，解析成一个字符串

InputStream is = response.getEntity().getContent();

String result = StreamTools.readStream(is);
System.out.println("---------"+ result);

Message msg = Message.obtain();
msg.obj = result;
handler.sendMessage(msg);
}

} catch (Exception e) {
e.printStackTrace();
}
};
}.start();
}
}

}