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keystore 
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¿ÉÐÅÈεÄÖ¤ÊéʵÌ壨trusted certificate
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ÔÚûÓÐÖÆ¶¨Éú³ÉλÖõÄÇé¿öÏ£¬keystore»á´æÔÚÓëÓû§µÄϵͳĬÈÏĿ¼£¬ 
È磺¶ÔÓÚwindow xpϵͳ£¬»áÉú³ÉÔÚϵͳµÄC:\Documents and Settings\UserName\ 
ÎļþÃûΪ“.keystore”
keystoreµÄÉú³É
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-genkey -alias tomcat -keyalg RSA   -keystore d:\mykeystore -dname
"CN=localhost, OU=localhost, O=localhost, L=SH, ST=SH, C=CN"
-keypass changeit -storepass -validity 180
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-genkey±íʾҪ´´½¨Ò»¸öеÄÃÜÔ¿ 
-dname±íʾÃÜÔ¿µÄDistinguished Names£¬ 
CN=commonName 
OU=organizationUnit 
O=organizationName 
L=localityName 
S=stateName 
C=country 
Distinguished Names±íÃ÷ÁËÃÜÔ¿µÄ·¢ÐÐÕßÉí·Ý 
-keyalgʹÓüÓÃܵÄËã·¨£¬ÕâÀïÊÇRSA 
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-storepass ´æÈ¡ÃÜÂ룬ÕâÀïÉèÖÃΪchangeit£¬Õâ¸öÃÜÂëÌṩϵͳ´ÓmykeystoreÎļþÖн«ÐÅϢȡ³ö 
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create table users(
userid int primary key,
username varchar2(20),
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);
insert into users values(1,'test','test');
insert into users values(2,'test','test');
insert into users values(3,'test','test');
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public class TextDemo {
public static void main(String[] args) {
RunnableEemo r1 = new RunnableEemo();
r1.REemo(r1);
System.out.println(r1.print());
}
}
class RunnableEemo extends ThreadRun implements Runnable {
Thread t2 = null;
public void REemo(RunnableEemo r1) {
Thread t1 = ......

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import java.io.File;
import java.io.FileInputStream;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class MD5Util
{
 private static char md5Chars[] =
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