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     Ò»Ö±ÏëʵÏÖÏñDriverManagerÄÇÑùµÄgetConnection·½·¨£¬Í¨¹ý´Ë·½·¨¾Í¿ÉÒÔ»ñµÃÁ¬½Ó£¬¶øÇÒ»¹²»ÓÃÖ¸¶¨Driver£¬µ«Ç°ÌáÊÇDriverÒѾ­Í¨¹ýClass.forName()»ònew Driver()½øÐÐÁ˼ÓÔØ¡£½ñÌìÖÕÓÚµÃÒÔʵÏÖ¡£
      package quiz;
import java.lang.reflect.Field;
public class ClassLoaderDriver {
/**
* @param args
* @throws NoSuchFieldException
* @throws SecurityException
* @throws IllegalAccessException
* @throws IllegalArgumentException
* @throws ClassNotFoundException
*/
public static void main(String[] args) throws SecurityException, NoSuchFieldException, IllegalArgumentException, IllegalAccessException, ClassNotFoundException {
Class.forName("com.mysql.jdbc.Driver");
Field field = ClassLoader.class.getDeclaredField("classes");
field.setAccessible(true);//ÉèÖøóÉÔ±±äÁ¿Îª¿É·ÃÎÊ
System.out.println(field.get(ClassLoader.getSystemClassLoader()));
}
}

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public class Base64 {
   
    //Âë±í
    static private char[] alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="
            .toCharArray();
   
&nb ......

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import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
public class TestStr {
public static void main(String[] args) {
   getDates();
}
public static void getDates() ......

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