Android美工坊--一个QQ登录验证的小例子

客户端：

1、登录时检查网络状态

2、登录加载进度条

3、登录服务器端进行验证，如果用户名和密码存在且正确，则登录，否则失败

4、注册时将用户信息保存到服务器端数据库中(MySQL)

5、记住密码功能（还不完善，只是测试）

6、对密码信息进行md5()单向加密

服务器端：

1、接收客户端发来的登录请求，如果用户名和密码存在于MySQL数据库中则返回客户端一个响应信息"success"

2、接收客户端发来的注册请求，将用户名和密码存放到MySQL数据库中

不过目前还存在很多问题，以后有时间继续更新

下面是效果图：

完整代码下载：http://115.com/file/bexv3qlf#LoginDemo.zip

客户端代码：

登录代码：这里是使用HttpClient来进行与服务器端的交互的，密码加密部分只是简单的用了下md5()，如果正式的项目中可以选用非对称加密算法会更加安全

View Code

package com.loulijun.logindemo;import java.security.MessageDigest;
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.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.net.ConnectivityManager;
import android.net.NetworkInfo.State;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.provider.Settings;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.Toast;public class LoginDemoActivity extends Activity {/** Called when the activity is first created. */private Button loginBtn;private Button registerBtn;private EditText inputUsername;private EditText inputPassword;private CheckBox saveInfoItem;private ProgressDialog mDialog;private String responseMsg = "";private static final int REQUEST_TIMEOUT = 5*1000;//设置请求超时10秒钟  private static final int SO_TIMEOUT = 10*1000;  //设置等待数据超时时间10秒钟  private static final int LOGIN_OK = 1;private SharedPreferences sp;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.login);loginBtn = (Button)findViewById(R.id.login_btn_login);registerBtn = (Button)findViewById(R.id.login_btn_zhuce);inputUsername = (EditText)findViewById(R.id.login_edit_account);inputPassword = (EditText)findViewById(R.id.login_edit_pwd);saveInfoItem = (CheckBox)findViewById(R.id.login_cb_savepwd);sp = getSharedPreferences("userdata",0);//初始化数据
        LoadUserdata();//检查网络
        CheckNetworkState();//监听记住密码选项saveInfoItem.setOnCheckedChangeListener(new CheckBox.OnCheckedChangeListener()  {  @Override  public void onCheckedChanged(CompoundButton buttonView,  boolean isChecked) {  // TODO Auto-generated method stub  //载入用户信息
               Editor editor = sp.edit();if(saveInfoItem.isChecked()){//获取已经存在的用户名和密码String realUsername = sp.getString("username", "");String realPassword = sp.getString("password", "");editor.putBoolean("checkstatus", true);editor.commit();if((!realUsername.equals(""))&&!(realUsername==null)||(!realPassword.equals(""))||!(realPassword==null)){//清空输入框inputUsername.setText("");inputPassword.setText("");//设置已有值
                         inputUsername.setText(realUsername);inputPassword.setText(realPassword);}}else{editor.putBoolean("checkstatus", false);editor.commit();//清空输入框inputUsername.setText("");inputPassword.setText("");}}  });  //登录loginBtn.setOnClickListener(new Button.OnClickListener(){@Overridepublic void onClick(View arg0) {mDialog = new ProgressDialog(LoginDemoActivity.this);mDialog.setTitle("登陆");mDialog.setMessage("正在登陆服务器，请稍后...");mDialog.show();Thread loginThread = new Thread(new LoginThread());loginThread.start();}});registerBtn.setOnClickListener(new Button.OnClickListener(){@Overridepublic void onClick(View arg0) {Intent intent = new Intent();intent.setClass(LoginDemoActivity.this, RegisterActivity.class);startActivity(intent);}});}private boolean loginServer(String username, String password){boolean loginValidate = false;//使用apache HTTP客户端实现String urlStr = "http://192.168.1.101:8080/LoginServlet/LoginServlet";HttpPost request = new HttpPost(urlStr);//如果传递参数多的话，可以丢传递的参数进行封装List<NameValuePair> params = new ArrayList<NameValuePair>();//添加用户名和密码params.add(new BasicNameValuePair("username",username));params.add(new BasicNameValuePair("password",password));try{//设置请求参数项request.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));HttpClient client = getHttpClient();//执行请求返回相应HttpResponse response = client.execute(request);//判断是否请求成功if(response.getStatusLine().getStatusCode()==200){loginValidate = true;//获得响应信息responseMsg = EntityUtils.toString(response.getEntity());}}catch(Exception e){e.printStackTrace();}return loginValidate;}//初始化HttpClient，并设置超时public HttpClient getHttpClient(){BasicHttpParams httpParams = new BasicHttpParams();HttpConnectionParams.setConnectionTimeout(httpParams, REQUEST_TIMEOUT);HttpConnectionParams.setSoTimeout(httpParams, SO_TIMEOUT);HttpClient client = new DefaultHttpClient(httpParams);return client;}//判断是否记住密码，默认记住private boolean isRemembered() {try {if (saveInfoItem.isChecked()) {return true;}} catch (Exception e) {// TODO Auto-generated catch block
            e.printStackTrace();}return false;}//初始化用户数据private void LoadUserdata(){boolean checkstatus = sp.getBoolean("checkstatus", false);if(checkstatus){saveInfoItem.setChecked(true);//载入用户信息//获取已经存在的用户名和密码String realUsername = sp.getString("username", "");String realPassword = sp.getString("password", "");if((!realUsername.equals(""))&&!(realUsername==null)||(!realPassword.equals(""))||!(realPassword==null)){inputUsername.setText("");inputPassword.setText("");inputUsername.setText(realUsername);inputPassword.setText(realPassword);}    }else{saveInfoItem.setChecked(false);inputUsername.setText("");inputPassword.setText("");}}//检查网络状态public void CheckNetworkState(){boolean flag = false;ConnectivityManager manager = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);State mobile = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState();State wifi = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState();//如果3G、wifi、2G等网络状态是连接的，则退出，否则显示提示信息进入网络设置界面if(mobile == State.CONNECTED||mobile==State.CONNECTING)return;if(wifi == State.CONNECTED||wifi==State.CONNECTING)return;showTips();}private void showTips(){AlertDialog.Builder builder = new AlertDialog.Builder(this);builder.setIcon(android.R.drawable.ic_dialog_alert);builder.setTitle("没有可用网络");builder.setMessage("当前网络不可用，是否设置网络？");builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// 如果没有网络连接，则进入网络设置界面startActivity(new Intent(Settings.ACTION_WIRELESS_SETTINGS));}});builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.cancel();LoginDemoActivity.this.finish();}});builder.create();builder.show();}//HandlerHandler handler = new Handler(){public void handleMessage(Message msg){switch(msg.what){case 0:mDialog.cancel();Toast.makeText(getApplicationContext(), "登录成功！", Toast.LENGTH_SHORT).show();Intent intent = new Intent();intent.setClass(LoginDemoActivity.this, MainActivity.class);startActivity(intent);finish();break;case 1:mDialog.cancel();Toast.makeText(getApplicationContext(), "密码错误", Toast.LENGTH_SHORT).show();break;case 2:mDialog.cancel();Toast.makeText(getApplicationContext(), "URL验证失败", Toast.LENGTH_SHORT).show();break;}}};//LoginThread线程类class LoginThread implements Runnable{@Overridepublic void run() {String username = inputUsername.getText().toString();String password = inputPassword.getText().toString();    boolean checkstatus = sp.getBoolean("checkstatus", false);if(checkstatus){//获取已经存在的用户名和密码String realUsername = sp.getString("username", "");String realPassword = sp.getString("password", "");if((!realUsername.equals(""))&&!(realUsername==null)||(!realPassword.equals(""))||!(realPassword==null)){if(username.equals(realUsername)&&password.equals(realPassword)){username = inputUsername.getText().toString();password = inputPassword.getText().toString();}}}else{password = md5(password);}System.out.println("username="+username+":password="+password);//URL合法，但是这一步并不验证密码是否正确boolean loginValidate = loginServer(username, password);System.out.println("----------------------------bool is :"+loginValidate+"----------response:"+responseMsg);Message msg = handler.obtainMessage();if(loginValidate){if(responseMsg.equals("success")){msg.what = 0;handler.sendMessage(msg);}else{msg.what = 1;handler.sendMessage(msg);}}else{msg.what = 2;handler.sendMessage(msg);}}}/*** MD5单向加密，32位，用于加密密码，因为明文密码在信道中传输不安全，明文保存在本地也不安全  * @param str* @return*/public static String md5(String str)  {  MessageDigest md5 = null;  try  {  md5 = MessageDigest.getInstance("MD5");  }catch(Exception e)  {  e.printStackTrace();  return "";  }  char[] charArray = str.toCharArray();  byte[] byteArray = new byte[charArray.length];  for(int i = 0; i < charArray.length; i++)  {  byteArray[i] = (byte)charArray[i];  }  byte[] md5Bytes = md5.digest(byteArray);  StringBuffer hexValue = new StringBuffer();  for( int i = 0; i < md5Bytes.length; i++)  {  int val = ((int)md5Bytes[i])&0xff;  if(val < 16)  {  hexValue.append("0");  }  hexValue.append(Integer.toHexString(val));  }  return hexValue.toString();  }  }

注册代码

View Code

package com.loulijun.logindemo;import java.security.MessageDigest;
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.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;import com.loulijun.logindemo.LoginDemoActivity.LoginThread;import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;public class RegisterActivity extends Activity {private EditText newUser,newPassword,confirmPassword;private Button registerBtn, clearBtn;private ProgressDialog mDialog;private String responseMsg = "";private static final int REQUEST_TIMEOUT = 5*1000;//设置请求超时10秒钟  private static final int SO_TIMEOUT = 10*1000;  //设置等待数据超时时间10秒钟  private static final int LOGIN_OK = 1;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.register);newUser = (EditText)findViewById(R.id.newUser_input);newPassword = (EditText)findViewById(R.id.newPassword_input);confirmPassword = (EditText)findViewById(R.id.Confirm_input);registerBtn = (Button)findViewById(R.id.registerbtn);clearBtn = (Button)findViewById(R.id.clearbtn);registerBtn.setOnClickListener(new Button.OnClickListener(){@Overridepublic void onClick(View v) {String newusername = newUser.getText().toString();String newpassword = md5(newPassword.getText().toString());String confirmpwd = md5(confirmPassword.getText().toString());if(newpassword.equals(confirmpwd)){SharedPreferences sp = getSharedPreferences("userdata",0);Editor editor = sp.edit();editor.putString("username", newusername);editor.putString("password", newpassword);editor.commit();mDialog = new ProgressDialog(RegisterActivity.this);mDialog.setTitle("登陆");mDialog.setMessage("正在登陆服务器，请稍后...");mDialog.show();Thread loginThread = new Thread(new RegisterThread());loginThread.start();}else{Toast.makeText(getApplicationContext(), "您两次输入的密码不一致！", Toast.LENGTH_SHORT).show();}}});clearBtn.setOnClickListener(new Button.OnClickListener(){@Overridepublic void onClick(View v) {newUser.setText("");newPassword.setText("");confirmPassword.setText("");}});}//初始化HttpClient，并设置超时public HttpClient getHttpClient(){BasicHttpParams httpParams = new BasicHttpParams();HttpConnectionParams.setConnectionTimeout(httpParams, REQUEST_TIMEOUT);HttpConnectionParams.setSoTimeout(httpParams, SO_TIMEOUT);HttpClient client = new DefaultHttpClient(httpParams);return client;}private boolean registerServer(String username, String password){boolean loginValidate = false;//使用apache HTTP客户端实现String urlStr = "http://192.168.1.101:8080/LoginServlet/RegisterServlet";HttpPost request = new HttpPost(urlStr);//如果传递参数多的话，可以丢传递的参数进行封装List<NameValuePair> params = new ArrayList<NameValuePair>();//添加用户名和密码params.add(new BasicNameValuePair("username",username));params.add(new BasicNameValuePair("password",password));try{//设置请求参数项request.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));HttpClient client = getHttpClient();//执行请求返回相应HttpResponse response = client.execute(request);//判断是否请求成功if(response.getStatusLine().getStatusCode()==200){loginValidate = true;//获得响应信息responseMsg = EntityUtils.toString(response.getEntity());}}catch(Exception e){e.printStackTrace();}return loginValidate;}//HandlerHandler handler = new Handler(){public void handleMessage(Message msg){switch(msg.what){case 0:mDialog.cancel();showDialog("注册成功！");break;case 1:mDialog.cancel();Toast.makeText(getApplicationContext(), "注册失败", Toast.LENGTH_SHORT).show();break;case 2:mDialog.cancel();Toast.makeText(getApplicationContext(), "URL验证失败", Toast.LENGTH_SHORT).show();break;}}};//RegisterThread线程类class RegisterThread implements Runnable{@Overridepublic void run() {String username = newUser.getText().toString();String password = md5(newPassword.getText().toString());//URL合法，但是这一步并不验证密码是否正确boolean registerValidate = registerServer(username, password);//System.out.println("----------------------------bool is :"+registerValidate+"----------response:"+responseMsg);Message msg = handler.obtainMessage();if(registerValidate){if(responseMsg.equals("success")){msg.what = 0;handler.sendMessage(msg);}else{msg.what = 1;handler.sendMessage(msg);}}else{msg.what = 2;handler.sendMessage(msg);}}}private void showDialog(String str){AlertDialog.Builder builder = new AlertDialog.Builder(this);builder.setTitle("注册");builder.setMessage(str);builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.dismiss();Intent intent = new Intent();intent.setClass(RegisterActivity.this, LoginDemoActivity.class);startActivity(intent);finish();}});AlertDialog dialog = builder.create();dialog.show();}/*** MD5单向加密，32位，用于加密密码，因为明文密码在信道中传输不安全，明文保存在本地也不安全  * @param str* @return*/public static String md5(String str)  {  MessageDigest md5 = null;  try  {  md5 = MessageDigest.getInstance("MD5");  }catch(Exception e)  {  e.printStackTrace();  return "";  }  char[] charArray = str.toCharArray();  byte[] byteArray = new byte[charArray.length];  for(int i = 0; i < charArray.length; i++)  {  byteArray[i] = (byte)charArray[i];  }  byte[] md5Bytes = md5.digest(byteArray);  StringBuffer hexValue = new StringBuffer();  for( int i = 0; i < md5Bytes.length; i++)  {  int val = ((int)md5Bytes[i])&0xff;  if(val < 16)  {  hexValue.append("0");  }  hexValue.append(Integer.toHexString(val));  }  return hexValue.toString();  }  }

主界面的布局：

View Code

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/loginRoot"android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="vertical" ><LinearLayout android:id="@+id/linear1"android:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_weight="1"android:background="@drawable/default_bg"android:orientation="vertical"><RelativeLayout android:id="@+id/relativelayout2"android:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_marginLeft="15.0px"android:layout_marginRight="15.0px"android:layout_marginTop="62.0px"android:background="@drawable/login_back"android:paddingBottom="10.0px"android:paddingTop="21.0px"><ImageViewandroid:id="@+id/faceImg"android:layout_width="wrap_content"android:layout_height="wrap_content"android:background="@drawable/login_head"/><EditTextandroid:id="@+id/login_edit_account"android:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_alignParentTop="true"android:layout_marginBottom="5.0dip"android:layout_marginLeft="5.0dip"android:layout_marginTop="5.0dip"android:layout_marginRight="5.0dip"android:layout_toRightOf="@+id/faceImg"android:background="@drawable/edit_login"android:hint="@string/username_hint"android:singleLine="true"android:paddingLeft="45.0sp"android:saveEnabled="true"android:textColor="#ff3f3f3f"/><TextView android:id="@+id/textview01"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignBottom="@+id/login_edit_account"android:layout_alignLeft="@+id/login_edit_account"android:layout_alignTop="@+id/login_edit_account"android:layout_marginRight="15.0sp"android:gravity="center_vertical"android:paddingLeft="7.0sp"android:text="@string/username_input"android:textColor="#ff3f3f3f"android:textSize="16.0dip"/><ImageButton android:id="@+id/usernamespinner"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignBottom="@+id/login_edit_account"android:layout_alignRight="@+id/login_edit_account"android:layout_alignTop="@+id/login_edit_account"android:layout_marginRight="1.0dip"android:background="@drawable/more_select"/><EditTextandroid:id="@+id/login_edit_pwd"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignLeft="@+id/login_edit_account"android:layout_alignRight="@+id/login_edit_account"android:layout_below="@+id/login_edit_account"android:layout_marginRight="1.0dip"android:background="@drawable/edit_login"android:password="true"android:singleLine="true"android:paddingLeft="45.0sp"android:saveEnabled="true"android:hint="@string/password_hint"/><TextView android:id="@+id/textview02"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignBottom="@+id/login_edit_pwd"android:layout_alignRight="@+id/textview01"android:layout_alignTop="@+id/login_edit_pwd"android:gravity="center_vertical"android:paddingLeft="7.0sp"android:text="@string/password_input"android:textColor="#ff3f3f3f"android:textSize="16.0dip"                /><CheckBox android:id="@+id/login_cb_savepwd"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignBaseline="@+id/login_btn_login"android:button="@drawable/btn_check"android:paddingLeft="39.0px"android:text="@string/opt_remember"android:textColor="#ff222222"android:textSize="16.0sp"/><Buttonandroid:id="@+id/login_btn_login"android:layout_width="90.0dp"android:layout_height="wrap_content"android:layout_below="@+id/textview02"android:layout_toLeftOf="@+id/login_btn_zhuce"android:layout_marginTop="7.0px"android:text="@string/login" /><Buttonandroid:id="@+id/login_btn_zhuce"android:layout_width="90.0dp"android:layout_height="wrap_content"android:layout_alignParentRight="true"android:layout_below="@+id/textview02"android:layout_marginTop="7.0px"android:text="@string/zhuce" /></RelativeLayout></LinearLayout></LinearLayout>

服务器端：

服务器端采用的是Servlet，比较简单

需要创建一个表，MySQL的，这部分还没有放到代码中处理，数据库名：monitordb，表：username varchar(30),password(50)。注意配置一下MySQL的驱动

web.xml

<?xml version="1.0" encoding="ISO-8859-1"?><web-app xmlns="http://java.sun.com/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"version="2.5"> <servlet><servlet-name>LoginServlet</servlet-name><servlet-class>com.loulijun.login.LoginServlet</servlet-class></servlet><!-- Define the Manager Servlet Mapping --><servlet-mapping><servlet-name>LoginServlet</servlet-name><url-pattern>/LoginServlet</url-pattern></servlet-mapping><servlet><servlet-name>RegisterServlet</servlet-name><servlet-class>com.loulijun.login.RegisterServlet</servlet-class></servlet><!-- Define the Manager Servlet Mapping --><servlet-mapping><servlet-name>RegisterServlet</servlet-name><url-pattern>/RegisterServlet</url-pattern></servlet-mapping></web-app>

LoginServlet.java：用于登录信息的Servlet

View Code

package com.loulijun.login;import java.io.IOException;
import java.io.PrintWriter;
import java.sql.*;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{Connection conn;PreparedStatement sql;ResultSet rs;try{Class.forName("com.mysql.jdbc.Driver");}catch (Exception e){System.out.print(e);}String username = request.getParameter("username");String password = request.getParameter("password");response.setContentType("text/html");response.setCharacterEncoding("utf-8");PrintWriter out = response.getWriter();String msg = null;String uri = "jdbc:mysql://127.0.0.1/monitordb";String selectsql = "select username,password from user where username=? and password=?";try{conn = DriverManager.getConnection(uri, "root", "loulijun");sql = conn.prepareStatement(selectsql);if(username!=null&&password!=null){sql.setString(1,username);sql.setString(2,password);rs = sql.executeQuery();boolean bool = rs.next();if(bool == true){msg = "success";}else{msg = "failed";}}else{msg = "failed";}conn.close();}catch (SQLException e){System.out.print(e);}out.print(msg);out.flush();out.close();}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException,IOException{doGet(request, response);}}

RegisterServlet.java：用于处理注册信息的Servlet

View Code

package com.loulijun.login;import java.io.IOException;
import java.io.PrintWriter;
import java.sql.*;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class RegisterServlet extends HttpServlet
{public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException{Connection conn;PreparedStatement sql;try{Class.forName("com.mysql.jdbc.Driver");}catch (Exception e){System.out.print(e);}String username = request.getParameter("username");String password = request.getParameter("password");response.setContentType("text/html");response.setCharacterEncoding("utf-8");PrintWriter out = response.getWriter();String msg = null;if(username!=null&&password!=null){msg = "success";try{String uri = "jdbc:mysql://127.0.0.1/monitordb";String insertSql = "insert into user values(?,?)";conn = DriverManager.getConnection(uri, "root", "loulijun");sql = conn.prepareStatement(insertSql);sql.setString(1,username);sql.setString(2,password);int status = sql.executeUpdate();if(status!=0){System.out.print("添加数据成功！");}else{System.out.print("添加数据失败");}conn.close();}catch (SQLException e){System.out.print(e);}}else{msg = "failed";}out.print(msg);out.flush();out.close();}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException,IOException{doGet(request, response);}}

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