正则表达式概念 正则表达式使用单个字符串来描述、匹配一系列符合某个句法规则的字符串。正则表达式可以用形式化语言理论的方式来表达,它由常量和算子组成,它们分别指示字符串的…
import java.util.EmptyStackException; import java.util.Stack; public class CaculateFunctio…
1 批量删除是调用sql引擎执行sql语句。批量插入有两种方式,a:自己拼接出一条sql语句 b:利用hibernate的session一级缓存,每多少条刷新缓存存入数据库 @Co…
import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import…
import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; impor…
/** * 日期工具类 */ public final class DateUtils { /** * 英文简写(默认)如:2010-12-01 */ public static …
/** * * 判断网络状态是否可用 * * @return true: 网络可用 ; false: 网络不可用 */ public boolean isConnectIntern…
/** * 人民币转成大写 * * @param value * @return String */ public static String hangeToBig(double …
自定义ListView: public class MyListView extends ListView implements OnScrollListener { public…
1、字符串数组与字符串之间的转换 一个字符串可以变为一个字符 数组,同样,也可以把一个字符数组,变为一个字符串。 在String类中提供了以下操作方法: 将字符串变为字符…
import java.sql.Timestamp; import java.text.DateFormat; import java.text.ParseException; i…
/*实现图片倒影(tested)*/ public class ButtonImageActivity extends Activity { /** Called when the…
使用AChartEngine制作Android曲线、柱状图、饼形等图表
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