Java Application Ö±½Óͨ¹ýjndiÁ¬½ÓÊý¾Ý¿â
ʹÓÃjar°ü:
commons-pool-1.5.3.jar,tomcat-naming-common.jar,commons-pool-1.5.3-bin.zip,commons-dbcp.jar
×¢Òâ:jdbc Çý¶¯ÒªÓëÊý¾Ý¿â¼æÈÝ.
package test.comm;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Hashtable;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
import org.apache.commons.dbcp.BasicDataSource;
public class DBConnector {
static private InitialContext ic = null;
static private DataSource ds = null;
static private void initContext(){
try {
BasicDataSource bds = new BasicDataSource();
bds.setUrl("jdbc:oracle:thin:@localhost:1521:test");
bds.setDriverClassName("oracle.jdbc.OracleDriver");
bds.setUsername("test");
bds.setPassword("a");
Hashtable<String, String> evn = new Hashtable<String,String>();
evn.put("java.naming.factory.initial","org.apache.naming.java.javaURLContextFactory");
ic = new InitialContext(evn);
ic.bind("mydatasource", bds);
ds = (DataSource) ic.lookup("mydatasource");
} catch (NamingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
static public Connection getConn() throws SQLException{
if (ds == null){
initContext();
}
return ds.getConnection();
}
}
²âÊÔ:
package test;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import test.comm.DBConnector;
public class wfTest {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
try {
Connection conn = DBConnector.getConn();
System.out.println("conn = "+conn);
String qSQL = "SELECT USERNAME,LOGINID from S_U_USER";
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(qSQL);
while (rs.next()){
System.out.println(rs.getString("USERNAME"));
System.out.print("
Ïà¹ØÎĵµ£º
Javaѧϰ´ÓÈëÃŵ½¾«Í¨
Ò»¡¢ JDK (Java Development Kit)
JDKÊÇÕû¸öJavaµÄºËÐÄ£¬°üÀ¨ÁËJavaÔËÐл·¾³£¨Java Runtime Envirnment£©£¬Ò»¶ÑJava¹¤¾ßºÍJava»ù´¡µÄÀà¿â(rt.jar)¡£²»ÂÛʲôJavaÓ¦Ó÷þÎñÆ÷ʵÖʶ¼ÊÇÄÚÖÃÁËij¸ö°æ±¾µÄJDK¡£Òò´ËÕÆÎÕJDKÊÇѧºÃJavaµÄµÚÒ»²½¡£×îÖ÷Á÷µÄJ ......
Java¸ß¼¶££JavaÏß³ÌÔËÐÐÕ»ÐÅÏ¢µÄ»ñÈ¡
·¢²¼Ê±¼ä£º2007.11.14 05:10 À´Ô´£ºÈüµÏÍø¼¼ÊõÉçÇø ×÷Õߣºbaocl
Ò»¡¢ÎÊÌâµÄÒýÈë
ÎÒÃÇÔÚJava³ÌÐòÖÐʹÓÃÈÕÖ¾¹¦ÄÜ£¨JDK Log»òÕßLog4J£©µÄʱºò£¬»á·¢ÏÖLogϵͳ»á×Ô¶¯°ïÎÒÃÇ´òÓ¡³ö·á¸»µÄÐÅÏ¢£¬¸ñʽһ°ãÈçÏ£º
[ÔËÐÐʱ¼ä] [µ ......
×ܽáÒ»£º
Java IOµÄÒ»°ãʹÓÃÔÔò£º
Ò»¡¢°´Êý¾ÝÀ´Ô´£¨È¥Ïò£©·ÖÀࣺ
1¡¢ÊÇÎļþ£º FileInputStream, FileOutputStream, FileReader, FileWriter
2¡¢ÊÇbyte[]£ºByteArrayInputStream, ByteArrayOutputStream
3¡¢ÊÇChar[]: CharArrayReader, CharArrayWriter
4¡¢ÊÇString: StringBufferInputStream, StringReader, StringW ......
JavaµÚÈý·½library ecosystemÊÇÒ»¸öºÜ¹ãÀ«µÄ·¶³ë¡£²»¾ÃǰÓÐÈË׫ÎÄ£ºÃ¿¸öÏîÄ¿ÖУ¬Äã±ØÐëÖªµÀµÄ11¸öJavaµÚÈý·½Àà¿â¡£
µ¥Ôª²âÊÔ
1.DBUnit
DBunitÊÇÒ»¸ö»ùÓÚjunitÀ©Õ¹µÄÊý¾Ý¿â²âÊÔ¿ò¼Ü¡£ËüÌṩÁË´óÁ¿µÄÀà¶ÔÓëÊý¾Ý¿âÏà¹ØµÄ²Ù×÷½øÐÐÁ˳éÏóºÍ·â×°¡£
2.MOckito
MockitoÊÇÒ»¸öÕë¶ÔJavaµÄmocking¿ò¼Ü¡£Äã¿ÉÒÔʹÓüò½àµÄAPI±àд³ö ......
Character Classes
[abc] Simple character class
[a-zA-Z]   ......