Java³ÌÐòµ÷Óô洢¹ý³ÌÓ¦ÓþÙÀý
Java³ÌÐòµ÷Óô洢¹ý³ÌÑéÖ¤Óû§µÇ¼
package com.yzy.jdbc.dao;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import oracle.jdbc.OracleTypes;
public class LoginDao {
public boolean loginValidate(String username, String password) {
boolean isValid = false;
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
String url = "jdbc:oracle:thin:@127.0.0.1:1521:orcl";
Connection conn = DriverManager.getConnection(url, "scott", "yzy");
CallableStatement cstmt = null;
ResultSet rs = null;
String sql = "{ call p_validate(?,?,?) }";
cstmt = conn.prepareCall(sql);
cstmt.setString(1, username);
cstmt.setString(2, password);
cstmt.registerOutParameter(3, OracleTypes.NUMBER);
cstmt.execute();
long num = cstmt.getLong(3);
if (num > 0) {
isValid = true;
}
} catch (Exception e) {
e.printStackTrace();
}
return isValid;
}
}
Java³ÌÐòµ÷Óô洢¹ý³Ì²éѯ²¢·µ»Ø½á¹û¼¯
package com.yzy.jdbc.dao;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import oracle.jdbc.OracleTypes;
public class Demo2Dao {
public void query() {
boolean isValid = false;
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
String url = "jdbc:oracle:thin:@127.0.0.1:1521:orcl";
Connection conn = DriverManager.getConnection(url, "scott", "yzy");
CallableStatement cstmt = null;
ResultSet rs = null;
String sql = "{ call pack_res.p_g
Ïà¹ØÎĵµ£º
Properties props=System.getProperties(); //ϵͳÊôÐÔ
System.out.println("JavaµÄÔËÐл·¾³°æ±¾£º"+props.getProperty("java.version"));
System.out.println("JavaµÄÔËÐл·¾³¹©Ó¦ÉÌ£º"+props.getProperty("java.vendor"));
System.out.println("Java¹©Ó¦É̵ÄURL£º"+props.getProperty("java.vendor.url"));
Syste ......
ͻ񻣼
±¾ÎÄÕë¶Ôjava³õѧÕß»òÕßannotation³õ´ÎʹÓÃÕßÈ«ÃæµØËµÃ÷ÁËannotationµÄʹÓ÷½·¨¡¢¶¨Ò巽ʽ¡¢·ÖÀà¡£³õѧÕß¿ÉÒÔͨ¹ýÒÔÉϵÄ˵Ã÷ÖÆ×÷¼òµ¥µÄannotation³ÌÐò£¬µ«ÊǶÔÓÚһЩ¸ß¼¶µÄannotationÓ¦Óã¨ÀýÈçʹÓÃ×Ô¶¨ÒåannotationÉú³ÉjavabeanÓ³ÉäxmlÎļþ£©»¹ÐèÒª½øÒ»²½µÄÑо¿ºÍ̽ÌÖ¡£Éæ¼°µ½ÉîÈëannotationµÄÄÚÈÝ£¬×÷Õß½«ÔÚºóÎÄ¡ ......
1£©Java Language Specification, Third Edition (by James Gosling)
±¾ÊéÓÉJava¼¼ÊõµÄ·¢Ã÷Õß±àд£¬ÊÇJava TM±à³ÌÓïÑÔµÄȨÍþÐÔ¼¼ÊõÖ¸ÄÏ¡£Èç¹ûÄãÏëÖªµÀÓïÑÔÖ®¹¹ÔìµÄ¾«È·º¬Ò壬±¾ÊéÊÇ×îºÃµÄ×ÊÔ´¡£
&nbs ......
java»·¾³Ïµ÷ÓÃVC++±àдµÄ¶¯Ì¬Á´½Ó¿âÎļþ
Ò»£¬¿ª·¢Æ½Ì¨£º
MyEclipse 6.0£¬VC++6.0
¶þ£¬JNI»ù´¡ÖªÊ¶£º
JNI(java native interface)£¬JAVA±¾µØ½Ó¿Úµ÷Óã¬Ä¿µÄÊÇΪÁËJAVA¿ÉÒÔµ÷Óñ¾µØ³ÌÐò¡£
Èý£¬½»»¥¹ý³Ì£º
1£¬½¨Á¢javaÀà¡£ÀýÈ磬½¨Á¢Ò»¸öRSA¼ÓÃܽâÃܵÄÀࣺ
package zkxx.ctais2.client.common;
public class RsaE ......
ComparatorºÍComparableÔÚÅÅÐòÖеÄÓ¦ÓÃ
µ±ÐèÒªÅÅÐòµÄ¼¯ºÏ»òÊý×é²»Êǵ¥´¿µÄÊý×ÖÐÍʱ£¬Í¨³£¿ÉÒÔʹÓÃComparator»òComparable£¬ÒÔ¼òµ¥µÄ·½Ê½ÊµÏÖ¶ÔÏóÅÅÐò»ò×Ô¶¨ÒåÅÅÐò¡£
Ò»¡¢Comparator
Ç¿ÐжÔij¸ö¶ÔÏócollection½øÐÐÕûÌåÅÅÐòµÄ±È½Ïº¯Êý£¬¿ÉÒÔ½«Comparator´«µÝ¸øCollections.sort»òArrays.sort¡£
½Ó¿Ú·½·¨£º
......