标签：android style blog class code c
遇到的问题：一个条件查询与多个条件查询，所用到的方式不一样
参考文档： http://www.oschina.net/question/1160609_133366 mybatis多条件查询的一个错误
解决方案如下：
利用序列号的方式解决多个参数的查询问题。对象与数据库关系的映射层。
层次结构如下：
首先定义model层里面的Userlist类，这是和我们后台mysql里面的表是一一对应的，然后定义UserlistMapper类，这个类主要是用来封装一些个方法，比如说增删改查等。其实现通过UserlistMapper.xml来实现，这个里面主要涉及一些sql语句。
做完上面这些以后，我们就需要和客户端交互，所以定义SrvUserlist类，主要与客户端进行交互。里面有dopost与doget等方法。当然先是响应service（）的方法，然后根据客户端的请求，选择不同的方法进行响应。比如说，客户端请求的是post方法，那么服务器端就需要执行dopost方法与之对应。
dao层代码：（Data access object）包含的数据的所有操作。数据访问层：
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);
}
参见这篇帖子：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层：
package zhuxuekui.model;
public class Userlist {
public String username; public String passward;}
Service层：
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("账号： "+username);// System.out.println("密码："+passward);SqlSession session = Constants.SQLFactory().openSession();
//UserlistMapper userMapper =session.getMapper(UserlistMapper.class); // Userlist userlist = userMapper.selectUserlist(username); //加载映射 ，与 userlistMapper挂钩 ，就是一条sql语句 UserlistMapper mapper = session.getMapper(UserlistMapper.class); //从数据库当中选择一条对的语句，进行比对。返回一条记录 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("账号： "+username);
System.out.println("密码："+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, "用户名密码不正确！");}
}
}
服务器端调试界面：
客户端代码：
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("用户名");ll.addView(etName, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
etPsw = new EditText(this);
etPsw.setHint("密码");ll.addView(etPsw, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
btnLogin = new Button(this);
btnLogin.setText("登 录"); 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, "用户名密码没有填写", Toast.LENGTH_LONG)
.show();
// 用户名密码没有填写 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, "用户名密码错误",
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;}
}
改进：1）客户端：没有做注册，只做了一个登陆。后期可能需要优化。
2）服务器端：只尝试了序列号的方法，后期尝试hashmap方法。
android客户端向服务器端验证登陆方法的实现1,布布扣,bubuko.com
标签：android style blog class code c
原文地址：http://www.cnblogs.com/zhuxuekui/p/3735538.html
