java¶ÁÎļþ
import java.io.*;
public class FileReaderSample {
public static void main(String args[]) throws IOException
{
// ½¨Á¢¿ÉÈÝÄÉ1024¸ö×Ö·ûµÄÊý×é
char data[]=new char[1024];
// ½¨Á¢¶ÔÏófr
FileReader fr=new FileReader("c:\\Java\\donkey.txt");
// ½«Êý¾Ý¶ÁÈë×Ö·ûÁбídataÄÚ
int num=fr.read(data);
// ½«×Ö·ûÁбíת»»³É×Ö·û´®
String str=new String(data,0,num);
// Êä³öÔÚ¿ØÖÆÌ¨
System.out.println("Characters read= "+num);
System.out.println(str);
fr.close();
}
}
ʾÀý¶þ£º
FileReader fr = null;
BufferedReader brd = null;
fr = new FileReader("c:\\h\\test.xml");
brd = new BufferedReader( fr );//×Ö·ûÁ÷ûÓÐÉèÖñàÂë¡£¡£¡£¡£¡£
while (brd.readLine() != null {
String fileline = brd.readLine();
out.println(fileline);
}
Ïà¹ØÎĵµ£º
Èç¹û°²×°JDKʱÌáʾÒѾ°²×°ÁËJDK£¨»òÕß°²×°µÄ°æ±¾²»ÊÇÄãÏëÒªµÄ£©£¬É¾³ýµÄ·½·¨ÈçÏ£º
# yum -y remove java-1.4.2-gcj-compat
1.°²×°JDK
Ê×ÏÈÐèÒª´ÓÍøÉÏÏÂÔØJDK°²×°Îļþ£¬Èç¹ûÎļþµÄÀàÐÍÊÇrpm.bin£¬¿ÉÒÔʹÓÃÏÂÃæµÄÃüÁî°²×°£º
# sh jdk-6u2-linux-i586-rpm.bin
Èç¹ûÎÄ ......
¡¡¡¡ÔõôÈóÌÐòÀûÓÃËÑË÷ÒýÇæÀ´ËѼ¯ÍøÖ·£¬ÕâÓÐʲôÓÃ?ºÜÓÐÓÃ!ÍøÉ϶¯éüÓÐÈ˽ÐÂôÍøÖ·Êý¾Ý¿â£¬Èç·¢²¼Èí¼þÍøÖ·¡¢ÓʼþµØÖ·¡¢ÂÛÌ³ÍøÖ·¡¢ÐÐÒµÍøÖ·£¬ÕâÐ©ÍøÖ·ÊÇÔõôÀ´µÄÄØ?²»¿ÉÄÜÊÇÈËÊÖ¹¤ÊÕ¼¯¶øÀ´µÄ£¬¶¼ÊÇÈóÌÐòÀûÓÃËÑË÷ÒýÇæÈ¡µ½µÄ£¬Èç¹ûÄúÐèҪijÀàÍøÖ·ÐÅÏ¢Êý¾Ý£¬¾Í¸ú³É¶¼ÀÊÎÖ½ÌÓýÀ´Ò»ÆðÑо¿Ò»Ï£¬·Ç³£¼òµ¥¡£
¡¡¡¡±¾ÎIJÉÓÃJavaÓïÑÔÐ ......
¹ØÓÚJavaÉú³É±³¾°Í¸Ã÷µÄpngͼƬ
×î½üÓõ½Java¶¯Ì¬Éú³É±³¾°Í¸Ã÷µÄͼƬ¹¦ÄÜ£¬´ÓgifºÍpngÖÐÑ¡ÔñÁËpng¸ñʽ£¬¸öÖÐÔµÓɾͲ»ËµÁË£¬ÓÚÊǶ¯ÊÖµ½ÍøÉÏËÑË÷ÓÐÓõĴúÂë¡£ÏÖ°ÑËÑË÷½á¹û×ܽáÈçÏ£º
1. Éú³ÉpngͼƬ
int width = 400;
int height = 300;
// ´´½¨BufferedImage¶ÔÏó
BufferedImage&nb ......
keytool -genkey -dname "CN=demo, OU=softDept, O=company,
L=puddong,S=shanghai, C=cn" -alias demo -keyalg RSA -keysize 1024
-keystore demoKeystore -validity 3650 -storepass storePwd -keypass
demoPwd
Éú³É±£´æ¹«Ô¿ºÍ˽ԿµÄÃÜÔ¿²Ö¿â£¬±£´æÔÚdemoKeystoreÎļþÖС£ÕâÀïstorepass ......
Java×Ö·û´®Ê¹ÓÃ×ܽá
ǰÑÔ£º
ÕâÆªÎÄÕµÄÄ¿µÄÊÇÌáÐÑ´ó¼Ò¶Ô×Ö·û´®ÈýÖÖÀàÐÍ×ö¸ö×ۺϵıȽϣ¬Ê¹µÃÔÚʹÓÃ×Ö·û´®ÈýÖÖÀàµÄʱºòÓиöÑ¡ÔñÒÀ¾Ý£¬ÕâÑù¿ÉÒÔ¼«´óÌá¸ß³ÌÐòÔËÐеÄЧÂÊ¡£Èç¹ûÄã¶ÔÕâ ......