java的常用函数代码

import java.util.*;

import java.util.regex.Pattern;

public class StrTools {

/** * 分割字符串 * * @param str String 原始字符串 * @param splitsign String 分隔符 * @return String[] 分割后的字符串数组 */ @SuppressWarnings("unchecked") public static String[] split(String str, String splitsign) { int index; if (str == null || splitsign == null) return null; ArrayList al = new ArrayList(); while ((index = str.indexOf(splitsign)) != -1) { al.add(str.substring(0, index)); str = str.substring(index + splitsign.length()); } al.add(str); return (String[]) al.toArray(new String[0]); }

此页暂停使用。。网页编辑总出问题

}

收藏的数据库联接，csdn上的

Java code

MySQL：
String Driver="com.mysql.jdbc.Driver";    //驱动程序
String URL="jdbc:mysql://localhost:3306/db_name";    //连接的URL,db_name为数据库名
String Username="username";    //用户名
String Password="password";    //密码
Class.forName(Driver).new Instance();
Connection con=DriverManager.getConnection(URL,Username,Password);
Microsoft SQL Server 2.0驱动(3个jar的那个):
String Driver="com.microsoft.jdbc.sqlserver.SQLServerDriver";    //连接SQL数据库的方法
String URL="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=db_name";    //db_name为数据库名
String Username="username";    //用户名
String Password="password";    //密码
Class.forName(Driver).new Instance();    //加载数据可驱动
Connection con=DriverManager.getConnection(URL,UserName,Password);    //
Microsoft SQL Server 3.0驱动(1个jar的那个): // 老紫竹完善
String Driver="com.microsoft.sqlserver.jdbc.SQLServerDriver";    //连接SQL数据库的方法
String URL="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=db_name";    //db_name为数据库名
String Username="username";    //用户名
String Password="password";    //密码
Class.forName(Driver).new Instance();    //加载数据可驱动
Connection con=DriverManager.getConnection(URL,UserName,Password);    //
Sysbase:
String Driver="com.sybase.jdbc.SybDriver";    //驱动程序
String URL="jdbc:Sysbase://localhost:5007/db_name";    //db_name为数据可名
String Username="username";    //用户名
String Password="password";    //密码
Class.forName(Driver).newInstance();
Connection con=DriverManager.getConnection(URL,Username,Password);
Oracle(用thin模式):
String Driver="oracle.jdbc.driver.OracleDriver";    //连接数据库的方法
String URL="jdbc:oracle:thin:@loaclhost:1521:orcl";    //orcl为数据库的SID
String Username="username";    //用户名
String Password="password";    //密码
Class.forName(Driver).newInstance();    //加载数据库驱动
Connection con=DriverManager.getConnection(URL,Username,Password);
PostgreSQL:
String Driver="org.postgresql.Driver";    //连接数据库的方法
String URL="jdbc:postgresql://localhost/db_name";    //db_name为数据可名
String Username="username";    //用户名
String Password="password";    //密码
Class.forName(Driver).newInstance();
Connection con=DriverManager.getConnection(URL,Username,Password);
DB2：
String Driver="com.ibm.db2.jdbc.app.DB2.Driver";    //连接具有DB2客户端的Provider实例
//String Driver="com.ibm.db2.jdbc.net.DB2.Driver";    //连接不具有DB2客户端的Provider实例
String URL="jdbc:db2://localhost:5000/db_name";    //db_name为数据可名
String Username="username";    //用户名
String Password="password";    //密码
Class.forName(Driver).newInstance();
Connection con=DriverManager.getConnection(URL,Username,Password);
Informix:
String Driver="com.informix.jdbc.IfxDriver";
String URL="jdbc:Informix-sqli://localhost:1533/db_name:INFORMIXSER=myserver";    //db_name为数据可名
String Username="username";    //用户名
String Password="password";    //密码
Class.forName(Driver).newInstance();
Connection con=DriverManager.getConnection(URL,Username,Password);
JDBC-ODBC:
String Driver="sun.jdbc.odbc.JdbcOdbcDriver";
String URL="jdbc:odbc:dbsource";    //dbsource为数据源名
String Username="username";    //用户名
String Password="password";    //密码
Class.forName(Driver).newInstance();
Connection con=DriverManager.getConnection(URL,Username,Password);

简单的txt转换xml

Java code [code]
package com.liu;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.StringTokenizer;

public class TxtToXml {
private String strTxtFileName;

private String strXmlFileName;

public TxtToXml() {
strTxtFileName = new String();
strXmlFileName = new String();
}

public void createXml(String strTxt, String strXml) {
strTxtFileName = strTxt;
strXmlFileName = strXml;
String strTmp;
try {
BufferedReader inTxt = new BufferedReader(new FileReader(
strTxtFileName));
BufferedWriter outXml = new BufferedWriter(new FileWriter(
strXmlFileName));
outXml.write("<?xml version= /"1.0/" encoding=/"gb2312/"?>");
outXml.newLine();
outXml.write("<people>");
while ((strTmp = inTxt.readLine()) != null) {
StringTokenizer strToken = new StringTokenizer(strTmp, "，");
String arrTmp[];
arrTmp = new String[3];
for (int i = 0; i < 3; i++)
arrTmp[i] = new String("");
int index = 0;
outXml.newLine();
outXml.write("    <students>");
while (strToken.hasMoreElements()) {
strTmp = (String) strToken.nextElement();
strTmp = strTmp.trim();
arrTmp[index++] = strTmp;
}
outXml.newLine();
outXml.write("        <name>" + arrTmp[0] + "</name>");
outXml.newLine();
outXml.write("        <sex>" + arrTmp[1] + "</sex>");
outXml.newLine();
outXml.write("        <age>" + arrTmp[2] + "</age>");
outXml.newLine();
outXml.write("    </students>");
}
outXml.newLine();
outXml.write("</people>");
outXml.flush();
} catch (Exception e) {
e.printStackTrace();
}
}

public static void main(String[] args) {
String txtName = "testtxt.txt";
String xmlName = "testxml.xml";
TxtToXml thisClass = new TxtToXml();
thisClass.createXml(txtName, xmlName);
}
}

[/code]