第二阶段：团队开发Fooks第六天

今天实现了书城的书籍列表

package com.example.fooks;

import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.OrientationHelper;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.StaggeredGridLayoutManager;

import com.example.fooks.entity.Book;
import com.example.fooks.entity.Bookshelf;
import com.example.fooks.utils.BooksAdapter;
import com.example.fooks.utils.ShopsAdapter;
import com.example.fooks.utils.ViewHolder;
import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.AsyncHttpResponseHandler;
import com.loopj.android.http.RequestParams;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;

import cz.msebera.android.httpclient.Header;

public class ListActivity extends AppCompatActivity {
    private String mUsername;
    private Button mHome;
    private Button mBook;
    private Button mPerson;
    private RecyclerView  mRecyclerView;
    private EditText editText;
    private EditText editText2;
    private List<Book> mShowBooks  =new ArrayList<>();
    private List <ViewHolder> mViewHolder;
    private static String TAG="ListActivity";
    //设置返回按钮：不应该退出程序---而是返回桌面
    //复写onKeyDown事件
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {

        if (keyCode == KeyEvent.KEYCODE_BACK) {
            Intent home = new Intent(Intent.ACTION_MAIN);
            home.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            home.addCategory(Intent.CATEGORY_HOME);
            startActivity(home);
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }
    @Override
    protected void onPause() {
        overridePendingTransition(0,0);
        super.onPause();
    }
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_list);

        Intent intent =getIntent();
        mUsername =intent.getStringExtra("username");
        //
        mBook=(Button) this.findViewById(R.id.btn_book);
        mHome=(Button) this.findViewById(R.id.btn_home);

        mPerson=(Button) this.findViewById(R.id.btn_person);

        //把输入框变成分割线 by：scf
        editText=this.findViewById(R.id.editText);
        editText2=this.findViewById(R.id.editText2);
        editText.setFocusableInTouchMode(false);//不可编辑
        editText.setKeyListener(null);
        editText2.setFocusableInTouchMode(false);//不可编辑
        editText2.setKeyListener(null);

        //
        mPerson.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(ListActivity.this,UserActivity.class);
                intent.putExtra("username",mUsername);
                startActivity(intent);
                ListActivity.this.overridePendingTransition(0, 0);

            }
        });
        mHome.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(ListActivity.this,MainActivity.class);
                intent.putExtra("username",mUsername);
                startActivity(intent);
                ListActivity.this.overridePendingTransition(0, 0);

            }
        });
        mBook.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(ListActivity.this,ReadActivity.class);
                intent.putExtra("username",mUsername);
                startActivity(intent);
                ListActivity.this.overridePendingTransition(0, 0);
            }
        });

        



        initBook();

    }

    private void initBook() {
        mRecyclerView=(RecyclerView)this.findViewById(R.id.shop_booklist);

        //获取数据
        AsyncHttpClient client =new AsyncHttpClient();
        String url = "http://47.94.229.72:8080/Fooks/BookListServlet";//url组成：ip:端口 + 服务端工程名 + servlet名
        RequestParams params = new RequestParams();
        params.put("username",mUsername);
        client.post(url, params, new AsyncHttpResponseHandler() {
            @Override
            public void onSuccess(int i, Header[] headers, byte[] bytes) {
                if(i == 200) {
                    try {
                        String result = new String(bytes,"utf-8");
                        Log.e(TAG,"返回结果"+result);
                        try {
                            JSONArray jsonArray = new JSONArray(result);
                            for(int j=0;j<jsonArray.length();j++){
                                JSONObject jsonObject=jsonArray.getJSONObject(j);
                                Book book =new Book();
                                book.setId(jsonObject.getInt("id"));
                                book.setBookName(jsonObject.getString("bookName"));
                                book.setBookPath(jsonObject.getString("bookPath"));
                                book.setCreateUser(jsonObject.getString("createUser"));
                                book.setCreateDate(jsonObject.getString("createDate"));
                                mShowBooks.add(book);
                            }
                            ShopsAdapter shopsAdapter=new ShopsAdapter(mShowBooks,ListActivity.this);
                            mRecyclerView.setLayoutManager(new LinearLayoutManager(ListActivity.this));
                            mRecyclerView.setAdapter(shopsAdapter);

                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    } catch (UnsupportedEncodingException e) {
                        e.printStackTrace();
                    }

                }
            }

            @Override
            public void onFailure(int i, Header[] headers, byte[] bytes, Throwable throwable) {
                Toast.makeText(getApplicationContext(),"请求失败，请检查网络",Toast.LENGTH_LONG).show();
            }
        });
    }
}

package Servlet;

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

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

import dao.dao;
import entity.Book;
import entity.User;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;


public class BookListServlet extends HttpServlet {
    
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
        response.setCharacterEncoding("utf-8");
        response.setContentType("text/html; charset=utf-8");
        String username=request.getParameter("username");
        dao dao =new dao();
        List<Book> books=new ArrayList();
        books=dao.Query();
        
        PrintWriter out = response.getWriter();
        JSONArray jsonArray = JSONArray.fromObject(books);
        
        out.print(jsonArray.toString());
    }


    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

}