2 我的第一个手机提交数据到tomcat服务器
~~~~~~~~~~~~~~~~WebProject的项目，在这里我们建为fe工程~~~~~~~
-----------------LoginServlet.java-------------
package com.csx;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class LoginServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String name = request.getParameter("name");
String password = request.getParameter("password");
if(name.equals("zz") && password.equals("123")) {
response.getOutputStream().write("success".getBytes());
} else {
response.getOutputStream().write("failed!!!!".getBytes());
}
}
}
。。。。。。web.xml。。。。。。。。。
<servlet>
<servlet-name>LoginServlet</servlet-name>
<servlet-class>com.csx.LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>LoginServlet</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
~~~~~~~~~~~~~~~~~~~Android项目~~~~~~~~~~~~~~~~~~~
----------------main.java--------------
package com.example.jn;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity {
private EditText etUserName;
private EditText etPassword;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
etUserName = (EditText) findViewById(R.id.et_username);
etPassword = (EditText) findViewById(R.id.et_password);
}
public void doGet(View v) {
final String userName = etUserName.getText().toString();
final String password = etPassword.getText().toString();
new Thread(
new Runnable() {
@Override
public void run() {
// 使用get方式抓去数据
final String state = NetUtils.loginOfGet(userName, password);
// 执行任务在主线程中
runOnUiThread(new Runnable() {
@Override
public void run() {
// 就是在主线程中操作
Toast.makeText(MainActivity.this, state, 0).show();
}
});
}
}).start();
}
public void doPost(View v) {
final String userName = etUserName.getText().toString();
final String password = etPassword.getText().toString();
new Thread(new Runnable() {
@Override
public void run() {
final String state = NetUtils.loginOfPost(userName, password);
// 执行任务在主线程中
runOnUiThread(new Runnable() {
@Override
public void run() {
// 就是在主线程中操作
Toast.makeText(MainActivity.this, state, 0).show();
}
});
}
}).start();
}
}
//javaURL方式的访问网页
---------------------NetUtils.java------------------
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import android.util.Log;
public class NetUtils {
private static final String TAG = "NetUtils";
/**
* 使用post的方式登录
* @param userName
* @param password
* @return
*/
public static String loginOfPost(String userName, String password) {
HttpURLConnection conn = null;
try {
URL url = new URL("http://192.168.137.1:8080/fe/LoginServlet");
conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST");
conn.setConnectTimeout(10000); // 连接的超时时间
conn.setReadTimeout(5000); // 读数据的超时时间
conn.setDoOutput(true);// 必须设置此方法, 允许输出
//conn.setRequestProperty("Content-Length", 234);// 设置请求头消息, 可以设置多个
// post请求的参数
String data = "name=" + userName + "&password=" + password;
// 获得一个输出流, 用于向服务器写数据, 默认情况下, 系统不允许向服务器输出内容
OutputStream out = conn.getOutputStream();
out.write(data.getBytes());
out.flush();
out.close();
int responseCode = conn.getResponseCode();
if(responseCode == 200) {
InputStream is = conn.getInputStream();
String state = getStringFromInputStream(is);
return state;
} else {
Log.i(TAG, "访问失败: " + responseCode);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if(conn != null) {
conn.disconnect();
}
}
return null;
}
/**
* 使用get的方式登录
* @param userName
* @param password
* @return 登录的状态
*/
public static String loginOfGet(String userName, String password) {
HttpURLConnection conn = null;
try {
String data = "name=" + URLEncoder.encode(userName) + "&password=" + URLEncoder.encode(password);
//由于我是通过真机连接电脑的wifi访问电脑的tomcat服务器，所以192.168.137.1为电脑发射wifi的ip地址（在手机上查则是网关地址）
URL url = new URL("http://192.168.137.1:8080/fe/LoginServlet?" + data);
conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");// get或者post必须得全大写
conn.setConnectTimeout(10000); // 连接的超时时间
conn.setReadTimeout(5000); // 读数据的超时时间
int responseCode = conn.getResponseCode();
if(responseCode == 200) {
InputStream is = conn.getInputStream();
String state = getStringFromInputStream(is);
return state;
} else {
Log.i(TAG, "访问失败: " + responseCode);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if(conn != null) {
conn.disconnect();// 关闭连接
}
}
return null;
}
/**
* 根据流返回一个字符串信息
* @param is
* @return
* @throws IOException
*/
private static String getStringFromInputStream(InputStream is) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = -1;
while((len = is.read(buffer)) != -1) {
baos.write(buffer, 0, len);
}
is.close();
String html = baos.toString();// 把流中的数据转换成字符串, 采用的编码是: utf-8
//String html = new String(baos.toByteArray(), "GBK");
baos.close();
return html;
}
}
。。。。。。。。。。。。。main.xml。。。。。。。。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<EditText
android:id="@+id/et_username"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="请输入姓名" />
<EditText
android:id="@+id/et_password"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="请输入密码" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="doGet"
android:text="Get方式提交" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="doPost"
android:text="Post方式提交" />
</LinearLayout>
、、、、、、权限、、、
<uses-permission android:name="android.permission.INTERNET"/>
//Android提供的访问网页的方式
//以下的红色字体可以代替上面的蓝色字体
----------------NetUtils2.java--------------
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import android.util.Log;
public class NetUtils2 {
private static final String TAG = "NetUtils";
/**
* 使用post的方式登录
* @param userName
* @param password
* @return
*/
public static String loginOfPost(String userName, String password) {
HttpClient client = null;
try {
// 定义一个客户端
client = new DefaultHttpClient();
// 定义post方法
HttpPost post = new HttpPost("http://192.168.137.1:8080/fe/LoginServlet");
// 定义post请求的参数
List<NameValuePair> parameters = new ArrayList<NameValuePair>();
parameters.add(new BasicNameValuePair("name", userName));
parameters.add(new BasicNameValuePair("password", password));
// 把post请求的参数包装了一层.
// 不写编码名称服务器收数据时乱码. 需要指定字符集为utf-8
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(parameters, "utf-8");
// 设置参数.
post.setEntity(entity);
// 设置请求头消息
// post.addHeader("Content-Length", "20");
// 使用客户端执行post方法
HttpResponse response = client.execute(post); // 开始执行post请求, 会返回给我们一个HttpResponse对象
// 使用响应对象, 获得状态码, 处理内容
int statusCode = response.getStatusLine().getStatusCode(); // 获得状态码
if(statusCode == 200) {
// 使用响应对象获得实体, 获得输入流
InputStream is = response.getEntity().getContent();
String text = getStringFromInputStream(is);
return text;
} else {
Log.i(TAG, "请求失败: " + statusCode);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if(client != null) {
client.getConnectionManager().shutdown(); // 关闭连接和释放资源
}
}
return null;
}
/**
* 使用get的方式登录
* @param userName
* @param password
* @return 登录的状态
*/
public static String loginOfGet(String userName, String password) {
HttpClient client = null;
try {
// 定义一个客户端
client = new DefaultHttpClient();
// 定义一个get请求方法
String data = "name=" + userName + "&password=" + password;
HttpGet get = new HttpGet("http://192.168.137.1:8080/fe/LoginServlet?" + data);
// response 服务器相应对象, 其中包含了状态信息和服务器返回的数据
HttpResponse response = client.execute(get); // 开始执行get方法, 请求网络
// 获得响应码
int statusCode = response.getStatusLine().getStatusCode();
if(statusCode == 200) {
InputStream is = response.getEntity().getContent();
String text = getStringFromInputStream(is);
return text;
} else {
Log.i(TAG, "请求失败: " + statusCode);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if(client != null) {
client.getConnectionManager().shutdown(); // 关闭连接, 和释放资源
}
}
return null;
}
/**
* 根据流返回一个字符串信息
* @param is
* @return
* @throws IOException
*/
private static String getStringFromInputStream(InputStream is) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = -1;
while((len = is.read(buffer)) != -1) {
baos.write(buffer, 0, len);
}
is.close();
String html = baos.toString(); // 把流中的数据转换成字符串, 采用的编码是: utf-8
// String html = new String(baos.toByteArray(), "GBK");
baos.close();
return html;
}
}