分类学习笔记下的文章 - Lan小站-嗯，不错！

2020-10-09

2020年10月09日
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2020-10-09

2020年10月09日
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2020-10-04

汤圆创作小说检索信息采集前段时间，因为一些原因，所以需要对这个汤圆创作的小说进行检索，于是写了几行python代码解析了一下搜索出来的结果的信息。# -*- coding: utf-8 -*- """ ------------------------------------------------- @ Author ：Lan @ Blog ：www.lanol.cn @ Date ： 2020/9/30 @ Description：I'm in charge of my Code ------------------------------------------------- """ import requests import parsel for i in range(1, 10094): url = f'https://www.itangyuan.com/search/book/%E4%B8%80%20%E7%94%9F.html?page={i}' res = requests.get(url).text xpathFile = parsel.Selector(res) author = xpathFile.xpath("//p[@class='author']/a/text()").extract() name = xpathFile.xpath("//p[@class='bname']/a/text()").extract() info = xpathFile.xpath("//p[@class='rw_info']/text()").extract() for index, value in enumerate(name): if '一' in value.replace(' ', '') and '生' in value.replace(' ', ''): if int(info[index].split('阅读')[0].replace(' ', '')) < 1000: print(value, author[index], info[index].split('/')[-1]) print(f'已检测至第{i}页')大概就是搜索出所有小说名包含一和生字且阅读量小于1000的。

2020年10月04日
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2020-09-29

Django设置全局模板变量最近由于需要，之前做的一个项目需要将图片文件转移至COS对象储存，因为服务器网络不行，图片加载太慢。经过一番猛如虎的操作，目的还是达到了。但是问题来了，图片上传好了，那怎么访问呢，我一开始想的是在数据里加一个表，就是用来存一些默认的字段。但是每次都得去取一次，然后还得返回，感觉实在有点浪费，于是想着有没有全局模板变量，就像我在模板中可以直接调用request.user一样。经过百度，找到了答案。先在一个view中添加你要返回的默认值然后在settings中的Templates->OPTIONS->context_processors进行注册（大概是这样叫吧，个人理解）然后就可以直接在模板中引用这个值了。

2020年09月29日
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2020-09-26

安卓在子线程传值给主线程，通过Handler传值昨晚上在进行http请求获取数据并修改listview的时候遇到了一个问题Only the original thread that created a view hierarchy can touch its views大概意思就是：只有创建了视图层级的原始线程才可以修改这个视图于是我百度了一下，然后大概解决方案是这样子的，子线程通过handler传值给主线程，主线程接收后，再进行修改listview。Handler handler = new Handler() { @Override public void handleMessage(Message msg) { super.handleMessage(msg); if (msg.what == 1) { Bundle data = msg.getData(); String val = data.getString("value"); //设置UI tvCode.setText(val); Log.i(TAG, "请求结果:" + val); } else if (msg.what ==0) { Toast.makeText(getApplicationContext(),"请求资源不成功",Toast.LENGTH_LONG).show(); } } }; /** * 处理网络请求的线程 */ private class RequestThread extends Thread { @Override public void run() { //网络请求 String string = 请求结果 Message msg = new Message(); Bundle data = new Bundle(); //将获取到的String装载到msg中 data.putString("value", string); msg.setData(data); msg.what = 1; //发消息到主线程 handler.sendMessage(msg); } } //点击事件启动新线程 public void test(View v){ new RequestThread().start(); }解决方法原链接：https://blog.csdn.net/LJX_ahut/article/details/89432576经过实践着实有用。获取前：获取后：MainActivity.java代码package ink.cik.logininfoapp; import androidx.appcompat.app.ActionBar; import androidx.appcompat.app.AppCompatActivity; import android.annotation.SuppressLint; import android.net.wifi.aware.DiscoverySession; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.util.Log; import android.view.Menu; import android.view.View; import android.widget.Adapter; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.ListView; import android.widget.Toast; import com.google.gson.Gson; import com.google.gson.reflect.TypeToken; import java.util.ArrayList; import java.util.List; import ink.cik.logininfoapp.eneity.userInfo; import ink.cik.logininfoapp.help.httpHelper; import okhttp3.OkHttpClient; import okhttp3.Request; import okhttp3.Response; public class MainActivity extends AppCompatActivity { private final Gson gson = new Gson(); @SuppressLint("HandlerLeak") Handler handler = new Handler() { @Override public void handleMessage(Message msg) { super.handleMessage(msg); if (msg.what == 1) { Bundle data = msg.getData(); String val = data.getString("value"); List<userInfo> userInfoList = parseJson(val); ListView listView = (ListView) findViewById(R.id.listInfo); ArrayList<String> list = new ArrayList<String>();//数据源集合创建 for (userInfo userInfo : userInfoList) { list.add(userInfo.getUserName()); } ArrayAdapter<String> adapter = new ArrayAdapter<String>( MainActivity.this, android.R.layout.simple_list_item_1, list ); listView.setAdapter(adapter); } else if (msg.what == 0) { Toast.makeText(MainActivity.this, "数据获取失败，请检查网络！", Toast.LENGTH_SHORT); } } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button button = (Button) findViewById(R.id.searchButton); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { getAll(); } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.menu, menu); return true; } private void getAll() { final httpHelper httpHelper = new httpHelper(); new Thread(new Runnable() { @Override public void run() { try { String res = httpHelper.httpGet("https://api.565.ink/login/getAll?passwd=lanol666"); Log.d("结果：", res); Message msg = new Message(); Bundle data = new Bundle(); //将获取到的String装载到msg中 data.putString("value", res); msg.setData(data); msg.what = 1; handler.sendMessage(msg); } catch (Exception e) { e.printStackTrace(); } } }).start(); } private List<userInfo> parseJson(String JsonData) { Gson gson = new Gson(); List<userInfo> userInfoList = gson.fromJson(JsonData, new TypeToken<List<userInfo>>() { }.getType()); return userInfoList; } }

2020年09月26日
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2020-09-24

Android在子线程显示Toast闪退，Can"t toast on a thread that has not called Loop 新建一个类toastHelppackage ink.cik.logininfoapp.eneity; import android.content.Context; import android.os.Looper; import android.widget.Toast; public class toastHelp { static Toast toast = null; public static void show(Context context, String text) { try { if (toast != null) { toast.setText(text); } else { toast = Toast.makeText(context, text, Toast.LENGTH_SHORT); } toast.show(); } catch (Exception e) { //解决在子线程中调用Toast的异常情况处理 Looper.prepare(); Toast.makeText(context, text, Toast.LENGTH_SHORT).show(); Looper.loop(); } } }然后需要用的时候直接调用toastHelp.show(LoginActivity.this, responseInfo.getInfo());

2020年09月24日
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2020-09-24

利用okhttp3调用接口，用gson解析json数据开心，总算搞好了调用接口获取所有用户信息，然后打印出来了。MainActivity.javapackage ink.cik.logininfoapp; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; import androidx.appcompat.app.AppCompatActivity; import com.google.gson.Gson; import com.google.gson.reflect.TypeToken; import java.io.IOException; import java.util.List; import java.util.Map; import okhttp3.OkHttpClient; import okhttp3.Request; import okhttp3.Response; public class MainActivity extends AppCompatActivity { private final Gson gson = new Gson(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button button = (Button) findViewById(R.id.loginButton); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { EditText userName = findViewById(R.id.userName); EditText passWord = findViewById(R.id.passWord); Toast.makeText(MainActivity.this, userName.toString(), Toast.LENGTH_SHORT).show(); verLogin(); } }); } private void verLogin() { new Thread(new Runnable() { @Override public void run() { try { OkHttpClient client = new OkHttpClient(); Request request = new Request.Builder().url("https://api.565.ink/login/getAll?passwd=lanol666").build(); Response response = client.newCall(request).execute(); String responsedata = response.body().string(); Log.d("返回数据：", responsedata); parseJson(responsedata); } catch (IOException e) { e.printStackTrace(); } } }).start(); } private void parseJson(String JsonData) { Gson gson = new Gson(); List<userInfo> userInfoList = gson.fromJson(JsonData, new TypeToken<List<userInfo>>() { }.getType()); for (userInfo userInfo : userInfoList) { Log.d("信息：", userInfo.getUserName()); } } }userInfo.javapackage ink.cik.logininfoapp; public class userInfo { private int id; private String userName; private String passWord; private String nation; private int age; private String tel; public int getAge() { return age; } public String getNation() { return nation; } public int getId() { return id; } public String getPassWord() { return passWord; } public String getTel() { return tel; } public String getUserName() { return userName; } public void setAge(int age) { this.age = age; } public void setId(int id) { this.id = id; } public void setNation(String nation) { this.nation = nation; } public void setPassWord(String passWord) { this.passWord = passWord; } public void setTel(String tel) { this.tel = tel; } public void setUserName(String userName) { this.userName = userName; } }

2020年09月24日
1,102 阅读
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