Java 删除文件夹以及文件夹下的子目录与文件

lshy168 — Thu, 01 Apr 2010 01:08:00 GMT

// 删除文件夹以及文件夹下的子目录与文件
private void deleteFile(File file) {
    if (file.exists()) {
        if (file.isFile()) {
            file.delete();
        } else if (file.isDirectory()) {
            File[] files = file.listFiles();
            for (File f : files) {
                this.deleteFile(f);
            }
        }
        file.delete();
    } else {
        System.out.println("所删除的" + file.getAbsolutePath() + "不存在！");
    }
}

lshy168 2010-04-01 09:08 发表评论

Java中的JDBC常用的连接字符串

lshy168 — Wed, 20 May 2009 04:58:00 GMT

1. Microsoft SQLServer(http://www.microsoft.com)

        (SqlServer 2000)
            Class.forName( "com.microsoft.jdbc.sqlserver.SQLServerDriver" );
            cn = DriverManager.getConnection( "jdbc:microsoft:sqlserver://localhost:1433;databaseName=pubs", sUsr, sPwd );

        (SqlServer 2005)
            Class.forName( "com.microsoft.sqlserver.jdbc.SQLServerDriver" );
            cn = DriverManager.getConnection( "jdbc:sqlserver://localhost:1433;databaseName=pubs", sUsr, sPwd );

2. Oracle(http://www.oracle.com/ip/deploy/database/oracle9i/)classes12.zip
        Class.forName( "oracle.jdbc.driver.OracleDriver" );
        cn = DriverManager.getConnection( "jdbc:oracle:thin:@MyDbComputerNameOrIP:1521:ORCL", sUsr, sPwd );

3. MySQL(http://www.mysql.com)mm.mysql-2.0.2-bin.jar
        Class.forName( "org.gjt.mm.mysql.Driver" );
        cn = DriverManager.getConnection( "jdbc:mysql://MyDbComputerNameOrIP:3306/myDatabaseName", sUsr, sPwd );

4. PostgreSQL(http://www.de.postgresql.org)pgjdbc2.jar
        Class.forName( "org.postgresql.Driver" );
        cn = DriverManager.getConnection( "jdbc:postgresql://MyDbComputerNameOrIP/myDatabaseName", sUsr, sPwd );

5. Sybase(http://jtds.sourceforge.net)jconn2.jar
        Class.forName( "com.sybase.jdbc2.jdbc.SybDriver" );
        cn = DriverManager.getConnection( "jdbc:sybase:Tds:MyDbComputerNameOrIP:2638", sUsr, sPwd );
        //(Default-Username/Password: "dba"/"sql")

6. Microsoft SQLServer(http://jtds.sourceforge.net)
        Class.forName( "net.sourceforge.jtds.jdbc.Driver" );
        cn = DriverManager.getConnection( "jdbc:jtds:sqlserver://MyDbComputerNameOrIP:1433/master", sUsr, sPwd );

7. ODBC
        Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
        Connection cn = DriverManager.getConnection( "jdbc:odbc:" + sDsn, sUsr, sPwd );

8.DB2(新添加)
        Class.forName("com.ibm.db2.jdbc.net.DB2Driver");
        String url="jdbc:db2://192.9.200.108:6789/SAMPLE"
        cn = DriverManager.getConnection( url, sUsr, sPwd );

9.Microsoft SQL Server series (6.5, 7.x and 2000) and Sybase 10

        JDBC Name: jTDS
        URL: http://jtds.sourceforge.net/
        Version: 0.5.1
        Download URL: http://sourceforge.net/project/showfiles.php?group_id=33291

        语法:
        Class.forName("net.sourceforge.jtds.jdbc.Driver ");
        Connection con = DriverManager.getConnection("jdbc:jtds:sqlserver://host:port/database","user","password");
        or
        Connection con = DriverManager.getConnection("jdbc:jtds:sybase://host:port/database","user","password");

10.Postgresql
        JDBC Name: PostgreSQL JDBC
        URL: http://jdbc.postgresql.org/
        Version: 7.3.3 build 110
        Download URL: http://jdbc.postgresql.org/download.html
        语法:
        Class.forName("org.postgresql.Driver");
        Connection con=DriverManager.getConnection("jdbc:postgresql://host:port/database","user","password");

11.IBM AS400主机在用的JDBC语法
        有装V4R4以上版本的Client Access Express
        可以在C:\Program Files\IBM\Client Access\jt400\lib
        找到 driver 档案 jt400.zip，并更改扩展名成为 jt400.jar
        语法:
        java.sql.DriverManager.registerDriver (new com.ibm.as400.access.AS400JDBCDriver ());
        Class.forName("com.ibm.as400.access.AS400JDBCConnection");
        con = DriverManager.getConnection("jdbc:as400://IP","user","password");

12.informix
        Class.forName("com.informix.jdbc.IfxDriver").newInstance();
        String url =
        "jdbc:informix-sqli://123.45.67.89:1533/testDB:INFORMIXSERVER=myserver;
        user=testuser;password=testpassword";
        Lib：jdbcdrv.zip<br><br>Class.forName( "com.sybase.jdbc.SybDriver" )
        url="jdbc:sybase:Tds:127.0.0.1:2638/asademo";
        SybConnection connection= (SybConnection)DriverManager.getConnection(url,"dba","sql");

13.SAP DB
        Class.forName ("com.sap.dbtech.jdbc.DriverSapDB");
        java.sql.Connection connection = java.sql.DriverManager.getConnection ( "jdbc:sapdb://" + host + "/" + database_name,user_name, password)

        14.InterBase
        String url = "jdbc:interbase://localhost/e:/testbed/database/employee.gdb";
        Class.forName("interbase.interclient.Driver");
        //Driver d = new interbase.interclient.Driver (); /* this will also work if you do not want the line above */
        Connection conn = DriverManager.getConnection( url, "sysdba", "masterkey" );

15.HSqlDB
        url:     http://hsqldb.sourceforge.net/
        driver:  org.hsqldb.jdbcDriver
        连接方式有4种，分别为：
        con-str（内存）: jdbc:hsqldb.
        con-str（本地）: jdbc:hsqldb:/path/to/the/db/dir
        con-str（http）: jdbc:hsqldb:http://dbsrv
        con-str（hsql）: jdbc:hsqldb:hsql://dbsrv

lshy168 2009-05-20 12:58 发表评论

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Java 删除文件夹以及文件夹下的子目录与文件

Java中的JDBC常用的连接字符串