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JAVA SE ÖеÄFile

 import java.io.File;

public class FileTest{
public static void main(String[] args){
scan("c:/file/ss");
}
public static void scan(String path){
if(path ==null)
return ;
File file = new File(path); //Éú³ÉÒ»¸öеÄÐéÄâÎļþ·¾¶
file.mkdirs(); //Èç¹û ‘c:/file/ss’·¾¶²»´æÔÚ£¬ÔòÉú³ÉеÄÎļþ¼Ð¼°Æä¸¸Îļþ¼Ð
String b = "aa.txt"; //ÔÚc:/file/ss Éú³ÉÐÂÎļþµÄÃû×Ö
File file1 = new File(file,b); //ÔÚ¸¸ÎļþÐéÄâ·¾¶ÏÂc:/file/ssÉú³ÉÒ»¸öеÄfile
//file1.mkdirs();
try{
file1.createNewFile();} //´´½¨Õâ¸öÎļþ
catch(Exception e){
e.printStackTrace();
}
}
}


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javaÖÐStringÓëStringBufferµÄÇø±ð

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1.Character ÊǽøÐе¥¸ö×Ö·û²Ù×÷µÄ£¬
 
2.String ¶ÔÒ»´®×Ö·û½øÐвÙ×÷¡£²»¿É±äÀà¡£
 
3.StringBuffer Ò²ÊǶÔÒ»´®×Ö·û½øÐвÙ×÷£¬µ«ÊǿɱäÀà¡£
 
String:
ÊǶÔÏó²»ÊÇԭʼÀàÐÍ.
Ϊ²»¿É±ä¶ÔÏó,Ò»µ©±»´´½¨,¾Í²»ÄÜÐÞ¸ÄËüµÄÖµ.
¶ÔÓÚÒѾ­´æÔÚµÄString¶ÔÏóµÄÐÞ¸ ......

Java²Ù×÷OracleÊý¾Ý¿â£¨½¨±í£¬²åÊý¾Ý£¬É¾³ý£©

ÓÃjpa²»Äܽ¨±í£¬sqlÓï¾äÊǶԵ쬲»¹ý¾ÍÊDz»Äܽ¨£¬Í¬ÑùµÄsql£¬ÔÚÏÂÃæµÄjdbcÖоͿÉÒÔ£¬¿ÉÄÜÊÇ¿ò¼ÜµÄÏÞÖÆ£¬Ï£Íû¸ßÈËÖ¸µã
import java.net.URL;
import java.sql.*;
public class Create {
public Create() {
}
public static void main(String[] args){
String url = "jdbc:oracle:thin:@10.0.1.3:1521:SDCDB" ......

JavaÖеÄtransient£¬volatileºÍstrictfp¹Ø¼ü×Ö

JavaÖеÄtransient£¬volatileºÍstrictfp¹Ø¼ü×Ö
    Èç¹ûÓÃtransientÉùÃ÷Ò»¸öʵÀý±äÁ¿£¬µ±¶ÔÏó´æ´¢Ê±£¬ËüµÄÖµ²»ÐèҪά³Ö¡£ÀýÈ磺
Java´úÂë
class T {   
   transient int a;  //²»ÐèҪά³Ö   
   int b;  ......

Java WEB¿ª·¢Ê±struts±êÇ© ÏÔʾsetÄÚÈÝ

ÔÚstrutsÖÐÓкöàµÄ±êÇ©·½±ã¿ª·¢£¬±ÈÈç<logic:iterate>±êÇ©£¬¿ÉÒԺܺõÄÏÔʾlistµÄÄÚÈÝ£º
£¨Ò»£©¶ÔListµÄÑ­»·±éÀú£º
  1.Ïȶ¨ÒåÒ»¸öUserÀࣺ
import java.io.Serializable;
public final class User implements Serializable {
private String name = null;
private String password ......

ÓÃjavaѹËõÎļþ

ѹËõÎļþ´úÂ룺
import java.io.*;
import java.util.zip.*;//ZipOutputStreamÕâ¸öÁ÷ÔÚÕâÀï
public class ZipOutputStreamTest
{
public static void main(String[] args) throws Exception
{
File f = new File("C:\\aaa.csv");
FileInputStream fis = new FileInputStream(f);
B ......
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