我们在开发安卓项目的时候,经常会用到控件WebView来加载一个网页,通过这种方式加载网页面不用考虑文字美化之类的,实现的效果就是…
package test.jdbc; import java.sql.*; public class JDBCTest { private static Connection co…
二维码这个东西自从出来后就一直流行到现在,无论走到哪里,二维码都可能出现在你的眼前。现在智能手机基本上都有扫一扫功能,扫的就是二维码。那我们…
在安卓开发中,不操作数据库的情况几乎是不可能的!一般情况下我们是在启动应用后,会在本地建立数据名(DATABASE_N…
dbcp 是 apache 上的一个 java 连接池项目,也是 tomcat 使用的连接池组件。单独使用dbcp需要3个包:common-dbcp.jar ,common-poo…
做几乎每一个Android应用开发,都少不了用到一个控件,那就是ListView,用于加载多条数据,并用一定的样式展示出来。…
download_main_layout.xml: <LinearLayout xmlns:android="http://schemas.android.com/…
public class DisplayTool { //要根据实际情况获取到上下文Context,也可以在方法中加入context作为参数 private static fina…
public class RandomString { public static String randomstring(int lo, int hi){ int n = ran…
/* * 从键盘输入一个日期,格式为yyyy-M-d 要求计算该日期与1949年10月1日距离多少天 例如: 用户输入了:1949-10-2 程序输出:1 用户输入了:1949-1…
public final class SystemTool { /** * 指定格式返回当前系统时间 */ public static String getDataTime(Str…
import java.io.File; import java.io.IOException; import java.io.RandomAccessFile; import j…
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