commonmethods.java

JAVA邮件系统

		}		
		else{
		
			String url = "jdbc:odbc:"+sDB;
			
			try {
				Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
			} catch(Exception e) {
				System.err.print("ClassNotFoundException: "); 
				System.err.println(e.getMessage());
				return null;
			}
			try {
				con = DriverManager.getConnection(url,sUser, sPass);
			} catch(Exception ex) {
				System.err.println("CommonMethods SQLException1: " + ex.getMessage());
				return null;
			}
		}
		return con;	
	}


	//for out a error message in HTML out;

	
	//make html code;
	static public String makeHtmlString(String sCode)
	{
		if(sCode==null)
			return "";
		StringBuffer sReturn=new StringBuffer (1024);
		int nLength = sCode.length ();
		char chari;
		for( int i=0;i<nLength;i++ ){
			chari =  sCode.charAt(i);
			if( chari<=0x20&&chari!=0xd&&chari!=0xa )
			   sReturn.append (" ");
			if( chari==0xa )
			   sReturn.append ("<BR>");
			if( chari==0xd )
			   continue;
			if( chari=='\"' )
			   sReturn.append ("&quot;");
			else if( chari=='&' )
			   sReturn.append ("&amp;");
			else if( chari=='>' )
			   sReturn.append ("&gt;");
			else if( chari=='<' )
			   sReturn.append ("&lt;");
			else 
			   sReturn.append (chari);
			   
		}
		return sReturn.toString (); 
	}

	static public String makeHtmlString1(String sCode)
	{
		if(sCode==null)
			return "";
		StringBuffer sReturn=new StringBuffer (1024);
		sReturn.append("<p>　　"); 
		int nLength = sCode.length ();
		char chari;
		for( int i=0;i<nLength;i++ ){
			chari =  sCode.charAt(i);
			if( chari<=0x20&&chari!=0xd&&chari!=0xa )
			   sReturn.append (" ");
			if( chari==0xa )
			   sReturn.append ("<br>");
			if( chari==0xd )
			   continue;
			if( chari=='\"' )
			   sReturn.append ("&quot;");
			else if( chari=='&' )
			   sReturn.append ("&amp;");
			else if( chari=='>' )
			   sReturn.append ("&gt;");
			else if( chari=='<' )
			   sReturn.append ("&lt;");
			else 
			   sReturn.append (chari);
			   
		}
		sReturn.append("</p>"); 
		return sReturn.toString (); 
	}
	
	public static String DealWithGBCodeOfRequest(String sGB)
	{
		try {
			byte[] sReguest = sGB.getBytes("8859_1");
			if(nUseGBTypeInDB==1)
				return new String (sReguest);
			else{
				System.out.println(sGB); 
				return sGB;
			}
		}catch(Exception e){
			return sGB;
		}
	}
	
	static String readIniFile( String sFile,String sKey ){
 		FileReader freader;
		// 将模板文件读到 templateContents 中
 		try
 		{
  			freader = new FileReader(sFile);
 		}catch(Exception e)
 		{
			GlobalError.setGlobalErr ("can't read init file!");
 			return null;
 		}

 		char[] contents = new char[200000];
 		int nSize = 0;
 		try
 		{
	 		nSize = freader.read(contents,0,200000);
			freader.close ();
 		}catch(Exception e)
 		{
			GlobalError.setGlobalErr ("read init file!");
 			return null;
 		}
		

 		String templateContents = new String(contents,0,nSize); 		
		
		int nBegin ,nEnd ;
		
		nBegin = templateContents.indexOf (sKey)+sKey.length ();
		if(nBegin==-1){
			GlobalError.setGlobalErr ("read key : "+sKey+ " fail!" );
			return null;
		}
		nEnd = templateContents.indexOf("\r\n",nBegin);
		if(nEnd == -1)
			nEnd = templateContents.length ();
		String sPath = templateContents.substring (nBegin,nEnd);
		return sPath;
	}

	//for error message of the global module ;
	static int Global_ErrorID = 0;
	static int getGlobalErrID(){
		return Global_ErrorID;
	}
	static void setGlobalErrID( int nErrID ){
		Global_ErrorID = nErrID;
	}
	
	//for get number value from string

	//return number value from the string ,
	//if fail , return the default value;
	static public int GetInt(String sInt,int Default){
		try{
			return Integer.valueOf (sInt).intValue ();
		}
		catch(Exception e){
			return Default;
		}
	}
	static public double GetDouble(String sDouble,double Default){
		try{
			return Double.valueOf (sDouble).doubleValue ();
		}
		catch(Exception e){
			return Default;
		}
	}
	
	//for get parameter from http request

	//return string from the request ,
	//if fail , return null;
	static public String getParameterValue(HttpServletRequest request,String sParam)
	{
		try{
			String sResult = request.getParameter(sParam);
			if( sResult!=null ){

				return DealWithGBCodeOfRequest(sResult.trim());
			}
			return null;
		}catch(Exception e){
			return null;
		}
	}

	//return string from the resultset ,
	//if fail , return null;
	static public String getFieldValue(ResultSet rs,String sField)
	{
		try{
			String sResult = rs.getString (sField);
			if( sResult!=null ){
				return sResult.trim();
			}
			return null;
		}catch(Exception e){
			return null;
		}
	}
	
	public static boolean WriteToDisk(byte[] sData , String sFile){
		System.out.println (sFile);
		
		if( sFile==null||sFile.length () == 0 ){
			return false;
		}
		File file = new File(sFile);
		while( file.exists ()&&!file.isDirectory () ){
			sFile = addSomeToFileName(sFile);
			file = new File(sFile);
		}
		try{
			FileOutputStream tempFS = new FileOutputStream (sFile);
			int nDataLength = sData.length ;
			tempFS.write (sData,0,nDataLength);
			tempFS.close ();
		}
		catch( Exception e){
			System.out.println ("write error:"+e.toString() );
			return false;
		}
		return true;
	}

	public static boolean WriteToDisk(byte[] sData , int nLeng , String sFile){
		if( sFile==null||sFile.length () == 0 )
			return false;
		File file = new File(sFile);
		while( file.exists ()&&!file.isDirectory () ){
			sFile = addSomeToFileName(sFile);
			file = new File(sFile);
		}
		try{
			FileOutputStream tempFS = new FileOutputStream (sFile);
			tempFS.write (sData,0,nLeng);
			tempFS.close ();
		}
		catch( Exception e){
			return false;
		}
		return true;
	}

	public static String addSomeToFileName(String sPath)
	{
		if( sPath==null )
			return null;
		int nIndex = sPath.lastIndexOf (""+File.separatorChar +"");
		if( nIndex==-1 )
			return null;
		return sPath.substring (0,nIndex)+""+File.separatorChar +"_"+sPath.substring (nIndex+1,sPath.length ());
	}
	public static String FormatDouble(double value,int nTail)
	{
		String sV="";
		StringBuffer sAdd = new StringBuffer();
		sV = Double.toString (value);
		if( sV.indexOf ('e')!=-1||sV.indexOf ('E')!=-1 )
			return "0.0";
		char code;
		int nlength=sV.length ();
		int nT = 0;
		boolean bBeginTail = false;
		for( int i=0;i<nlength;i++ ){
			code = sV.charAt (i);
			if( code=='.' ){
				if( sAdd.length ()==0||sAdd.charAt (i-1 )=='-' )
					sAdd.append ('0');
				bBeginTail = true;
			}
			sAdd.append (code);

			if( bBeginTail==true )
				nT++;
			if( nT > nTail  )
				break;
		}
		if(sAdd.length ()==0)
			return "0";
		return sAdd.toString ();
	}
	public static String FormatDoubleString(String sV,int nTail)
	{
		if(sV==null)
			return "";
		StringBuffer sAdd = new StringBuffer();
		char code;
		int nlength=sV.length ();
		int nT = 0;
		boolean bBeginTail = false;
		for( int i=0;i<nlength;i++ ){
			code = sV.charAt (i);
			if( code=='.' ){
				if( sAdd.length ()==0||sAdd.charAt (i-1 )=='-' )
					sAdd.append ('0');
				bBeginTail = true;
			}
			sAdd.append (code);

			if( bBeginTail==true )
				nT++;
			if( nT > nTail  )
				break;
		}
		if(sAdd.length ()==0)
			return "0";
		return sAdd.toString ();
	}

	public static String DealWithSQLParameter(String sInfo)
	{
		if(sInfo==null)
			return "";
		StringBuffer sBuff=new StringBuffer ();
		int nLeng = sInfo.length ();
		char code;
		for( int i=0;i<nLeng;i++)
		{
			code = sInfo.charAt (i);
			if(code==0x27)
				sBuff.append ((char)0x27);
			sBuff.append (code);
		}
		return sBuff.toString ();
	}
	
	public static String sUrl365Mail =  "http://www.365do.com/cgi-bin/mail/main.pl";
	public static String GetUrl365Mail (){
		return sUrl365Mail;
	}
	
	static String sMailHost = "http://www.365do.com";
	public static String GetMailHost (){
		return sMailHost;
	}

	public static String getUserEmailFile(String user)
	{
		String sDir = CommonMethods.GetUserEmaildir();
		File   Dir = new File (sDir);
		if(Dir.exists ()==false )
			Dir.mkdir ();
		sDir = sDir+user;
		Dir = new File (sDir);
		if(Dir.exists ()==false )
			Dir.mkdir ();
		sDir = sDir+""+File.separatorChar +""+"EmailInfo";
		Dir = new File (sDir);
		if(Dir.exists ()==false )
			Dir.mkdir ();
		return sDir +""+File.separatorChar +"em.txt";
	}
	
	public static String ReadFromDisk(String FileName){
		
		if( FileName==null||FileName.length () == 0 )
			return null;
		
		File tempFile=new File(FileName);
		if( tempFile.exists ()==false || tempFile.canRead ()==false )
			return null;
		int nDataLength =(int)tempFile.length ();
		byte[] sReturn ;
		try{
			FileInputStream tempFS = new FileInputStream (FileName);
			sReturn = new byte[nDataLength];			
			tempFS.read (sReturn);
		}