android客戶端向服務器端驗證登陸方法的實現1

遇到的問題：一個條件查詢與多個條件查詢，所用到的方式不一樣

參考文檔： http://www.oschina.net/question/1160609_133366    mybatis多條件查詢的一個錯誤

解決方案如下：

利用序列號的方式解決多個參數的查詢問題。對象與數據庫關系的映射層。我們也可以用hashmap實現。

層次結構如下：

     首先定義model層里面的Userlist類，這是和我們后台mysql里面的表是一一對應的，然后定義UserlistMapper類，這個類主要是用來封裝一些個方法，比如說增刪改查等。其實現通過UserlistMapper.xml來實現，這個里面主要涉及一些sql語句。

      做完上面這些以后，我們就需要和客戶端交互，所以定義SrvUserlist類，主要與客戶端進行交互。里面有dopost與doget等方法。當然先是響應service（）的方法，然后根據客戶端的請求，選擇不同的方法進行響應。比如說，客戶端請求的是post方法，那么服務器端就需要執行dopost方法與之對應。

dao層代碼：（Data access object）包含的數據的所有操作。數據訪問層：

package zhuxuekui.data;

import java.util.List;

import org.apache.ibatis.annotations.Param;

import zhuxuekui.model.Userlist;



public interface UserlistMapper {

    Userlist selectUserlist(@Param("username")String username,@Param("passward")String passward);
}

 

參見這篇帖子：http://zhuyuehua.iteye.com/blog/1721715

配置文件：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    <mapper  namespace="zhuxuekui.data.UserlistMapper">

        <resultMap id="userResultMap"  type="Userlist">
            <result property="username" column="username"></result>
            <result property="passward" column="passward"></result>
        </resultMap>

        <select id="selectUserlist"  parameterType="Map"
            resultMap="userResultMap">
            select  * from userlist
            where username = #{username}  and passward = #{passward}
        </select>
    </mapper>

Model層：

package zhuxuekui.model;

public class Userlist {

    public String username;

    public String passward;
}

 

Service層：

package zhuxuekui.service;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.ibatis.builder.annotation.MapperAnnotationBuilder;
import org.apache.ibatis.session.SqlSession;

import zhuxuekui.data.UserlistMapper;
import zhuxuekui.model.Userlist;

public class SrvUserlist extends HttpServlet {

    private static final long serialVersionUID = 1L;

    @Override
    protected void service(HttpServletRequest req, HttpServletResponse res)
            throws ServletException, IOException {
        res.getWriter().println("Hello World｜｜｜｜!");
        super.service(req, res);
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse res)
            throws ServletException, IOException {
//         String resource = "/com/arthur/data/Configuration.xml";
//         Reader reader;
//         try {
//         reader = Resources.getResourceAsReader(resource);
//         Constants.SQL_FACTORY = new SqlSessionFactoryBuilder()
//         .build(reader);
//         } catch (Exception e) {
//         e.printStackTrace();
//         e.printStackTrace(res.getWriter());
//         }
        String username = req.getParameter("username");
        String passward = req.getParameter("passward");
//
//        System.out.println("賬號： "+username);
//        System.out.println("密碼："+passward);

        SqlSession session = Constants.SQLFactory().openSession();

        //UserlistMapper  userMapper =session.getMapper(UserlistMapper.class);
      //  Userlist userlist = userMapper.selectUserlist(username);
        //加載映射 ，與 userlistMapper掛鈎 ，就是一條sql語句
        UserlistMapper mapper = session.getMapper(UserlistMapper.class);
        //從數據庫當中選擇一條對的語句，進行比對。返回一條記錄
        Userlist userlist = mapper.selectUserlist(username,passward);
        if (userlist !=null) {
            //res.getWriter().println("there is no user with name" + username);
            String json = Constants.GSON.toJson(userlist);
            res.getWriter().println(json);
        }
        else {
            res.getWriter().println("there is new reader with name" + username);
        }

    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        this.doGet(req, resp);


        //String userName = req.getParameter("username");
        String username = req.getParameter("username");
        String passward = req.getParameter("passward");

        System.out.println("賬號： "+username);
        System.out.println("密碼："+passward);
        SqlSession session = Constants.SQLFactory().openSession();

        UserlistMapper mapper = session.getMapper(UserlistMapper.class);
        Userlist userlist = mapper.selectUserlist(username,passward);
        if (userlist != null) {
            resp.setStatus(200);
        } else {
            resp.sendError(345, "用戶名密碼不正確！");
        }
    }
}

服務器端調試界面：

客戶端代碼：

package com.buu.play.aa;

import org.apache.http.Header;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;
import android.widget.Toast;

import com.buu.play.BMapApiDemoMain;
import com.buu.play.DemoApplication;
import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.BaseJsonHttpResponseHandler;
import com.loopj.android.http.RequestParams;

public class LoginActivity extends Activity implements OnClickListener {

    static final String TAG = "ahttp";
    private EditText etName, etPsw;
    private Button btnLogin;
    AsyncHttpClient httpClient;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        httpClient = DemoApplication.instance().asyncHttpClient;

        LinearLayout ll = new LinearLayout(this);
        ll.setOrientation(LinearLayout.VERTICAL);
        ll.setPadding(25, 25, 25, 25);
        setContentView(ll);

        etName = new EditText(this);
        etName.setHint("用戶名");
        ll.addView(etName, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);

        etPsw = new EditText(this);
        etPsw.setHint("密碼");
        ll.addView(etPsw, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);

        btnLogin = new Button(this);
        btnLogin.setText("登 錄");
        btnLogin.setOnClickListener(this);
        ll.addView(btnLogin, LayoutParams.MATCH_PARENT,
                LayoutParams.WRAP_CONTENT);

    }

    @Override
    public void onClick(View v) {

        // Intent intent = new Intent(LoginActivity.this,
        // BMapApiDemoMain.class);
        // LoginActivity.this.startActivity(intent);

        if (!isValid()) {
            Toast.makeText(LoginActivity.this, "用戶名密碼沒有填寫", Toast.LENGTH_LONG)
                    .show();
            // 用戶名密碼沒有填寫
            return;
        }
        //
        // TODO do request
        RequestParams param = new RequestParams();
        param.put("username", etName.getText().toString());
        param.put("passward", etPsw.getText().toString());
        httpClient.post("http://192.168.1.106:8080/login", param,
                new BaseJsonHttpResponseHandler<Object>() {

                    @Override
                    public void onSuccess(int statusCode, Header[] headers,
                            String rawJsonResponse, Object response) {
                        Log.d(TAG, rawJsonResponse);
                        Intent intent = new Intent(LoginActivity.this,
                                BMapApiDemoMain.class);
                        LoginActivity.this.startActivity(intent);
                        finish();
                    }

                    @Override
                    public void onFailure(int statusCode, Header[] headers,
                            Throwable throwable, String rawJsonData,
                            Object errorResponse) {
                        // Intent intent = new Intent(LoginActivity.this,
                        // BMapApiDemoMain.class);
                        // LoginActivity.this.startActivity(intent);
                        // finish();
                        Toast.makeText(LoginActivity.this, "用戶名密碼錯誤",
                                Toast.LENGTH_LONG).show();
                    }

                    @Override
                    protected Object parseResponse(String rawJsonData,
                            boolean isFailure) throws Throwable {
                        Log.d(TAG, rawJsonData);
                        return rawJsonData;
                    }
                });
    }

    private boolean isValid() {
        return etName.getText().length() > 0 && etPsw.getText().length() > 0;
    }
}

改進：1）客戶端：沒有做注冊，只做了一個登陸。后期可能需要優化。

         2）服務器端：只嘗試了序列號的方法，后期嘗試hashmap方法。